| Commit message (Collapse) | Author | Age | Files | Lines |
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git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips
Pull MIPS fixes from James Hogan:
- fix build with DEBUG_ZBOOT and MACH_JZ4770 (4.16)
- include xilfpga FDT in fitImage and stop generating dtb.o (4.15)
- fix software IO coherence on CM SMP systems (4.8)
- ptrace: Fix PEEKUSR/POKEUSR to o32 FGRs (3.14)
- ptrace: Expose FIR register through FP regset (3.13)
- fix typo in KVM debugfs file name (3.10)
* tag 'mips_fixes_4.17_2' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips:
MIPS: Fix ptrace(2) PTRACE_PEEKUSR and PTRACE_POKEUSR accesses to o32 FGRs
MIPS: xilfpga: Actually include FDT in fitImage
MIPS: xilfpga: Stop generating useless dtb.o
KVM: Fix spelling mistake: "cop_unsuable" -> "cop_unusable"
MIPS: ptrace: Expose FIR register through FP regset
MIPS: Fix build with DEBUG_ZBOOT and MACH_JZ4770
MIPS: c-r4k: Fix data corruption related to cache coherence
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Check the TIF_32BIT_FPREGS task setting of the tracee rather than the
tracer in determining the layout of floating-point general registers in
the floating-point context, correcting access to odd-numbered registers
for o32 tracees where the setting disagrees between the two processes.
Fixes: 597ce1723e0f ("MIPS: Support for 64-bit FP with O32 binaries")
Signed-off-by: Maciej W. Rozycki <macro@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.14+
Signed-off-by: James Hogan <jhogan@kernel.org>
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Commit b35565bb16a5 ("MIPS: generic: Add support for MIPSfpga") added
and its.S file for xilfpga but forgot to add it to
arch/mips/generic/Platform so it is never used.
Fixes: b35565bb16a5 ("MIPS: generic: Add support for MIPSfpga")
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 4.15+
Patchwork: https://patchwork.linux-mips.org/patch/19245/
Signed-off-by: James Hogan <jhogan@kernel.org>
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A dtb.o is generated from nexys4ddr.dts but this is never used since it
has been moved to mips/generic with commit b35565bb16a5 ("MIPS: generic:
Add support for MIPSfpga").
Fixes: b35565bb16a5 ("MIPS: generic: Add support for MIPSfpga")
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 4.15+
Patchwork: https://patchwork.linux-mips.org/patch/19244/
Signed-off-by: James Hogan <jhogan@kernel.org>
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Trivial fix to spelling mistake in debugfs_entries text.
Fixes: 669e846e6c4e ("KVM/MIPS32: MIPS arch specific APIs for KVM")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kernel-janitors@vger.kernel.org
Cc: <stable@vger.kernel.org> # 3.10+
Signed-off-by: James Hogan <jhogan@kernel.org>
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Correct commit 7aeb753b5353 ("MIPS: Implement task_user_regset_view.")
and expose the FIR register using the unused 4 bytes at the end of the
NT_PRFPREG regset. Without that register included clients cannot use
the PTRACE_GETREGSET request to retrieve the complete FPU register set
and have to resort to one of the older interfaces, either PTRACE_PEEKUSR
or PTRACE_GETFPREGS, to retrieve the missing piece of data. Also the
register is irreversibly missing from core dumps.
This register is architecturally hardwired and read-only so the write
path does not matter. Ignore data supplied on writes then.
Fixes: 7aeb753b5353 ("MIPS: Implement task_user_regset_view.")
Signed-off-by: James Hogan <jhogan@kernel.org>
Signed-off-by: Maciej W. Rozycki <macro@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.13+
Patchwork: https://patchwork.linux-mips.org/patch/19273/
Signed-off-by: James Hogan <jhogan@kernel.org>
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The debug definitions were missing for MACH_JZ4770, resulting in a build
failure when DEBUG_ZBOOT was set.
Since the UART addresses are the same across all Ingenic SoCs, we just
use a #ifdef CONFIG_MACH_INGENIC instead of checking for individual
Ingenic SoCs.
Additionally, I added a #define for the UART0 address in-code and
dropped the <asm/mach-jz4740/base.h> include, for the reason that this
include file is slowly being phased out as the whole platform is being
moved to devicetree.
Fixes: 9be5f3e92ed5 ("MIPS: ingenic: Initial JZ4770 support")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 4.16
Patchwork: https://patchwork.linux-mips.org/patch/18957/
Signed-off-by: James Hogan <jhogan@kernel.org>
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When DMA will be performed to a MIPS32 1004K CPS, the L1-cache for the
range needs to be flushed and invalidated first.
The code currently takes one of two approaches.
1/ If the range is less than the size of the dcache, then HIT type
requests flush/invalidate cache lines for the particular addresses.
HIT-type requests a globalised by the CPS so this is safe on SMP.
2/ If the range is larger than the size of dcache, then INDEX type
requests flush/invalidate the whole cache. INDEX type requests affect
the local cache only. CPS does not propagate them in any way. So this
invalidation is not safe on SMP CPS systems.
Data corruption due to '2' can quite easily be demonstrated by
repeatedly "echo 3 > /proc/sys/vm/drop_caches" and then sha1sum a file
that is several times the size of available memory. Dropping caches
means that large contiguous extents (large than dcache) are more likely.
This was not a problem before Linux-4.8 because option 2 was never used
if CONFIG_MIPS_CPS was defined. The commit which removed that apparently
didn't appreciate the full consequence of the change.
We could, in theory, globalize the INDEX based flush by sending an IPI
to other cores. These cache invalidation routines can be called with
interrupts disabled and synchronous IPI require interrupts to be
enabled. Asynchronous IPI may not trigger writeback soon enough. So we
cannot use IPI in practice.
We can already test if IPI would be needed for an INDEX operation with
r4k_op_needs_ipi(R4K_INDEX). If this is true then we mustn't try the
INDEX approach as we cannot use IPI. If this is false (e.g. when there
is only one core and hence one L1 cache) then it is safe to use the
INDEX approach without IPI.
This patch avoids options 2 if r4k_op_needs_ipi(R4K_INDEX), and so
eliminates the corruption.
Fixes: c00ab4896ed5 ("MIPS: Remove cpu_has_safe_index_cacheops")
Signed-off-by: NeilBrown <neil@brown.name>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 4.8+
Patchwork: https://patchwork.linux-mips.org/patch/19259/
Signed-off-by: James Hogan <jhogan@kernel.org>
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Pull networking fixes from David Miller:
1) Fix refcounting bug for connections in on-packet scheduling mode of
IPVS, from Julian Anastasov.
2) Set network header properly in AF_PACKET's packet_snd, from Willem
de Bruijn.
3) Fix regressions in 3c59x by converting to generic DMA API. It was
relying upon the hack that the PCI DMA interfaces would accept NULL
for EISA devices. From Christoph Hellwig.
4) Remove RDMA devices before unregistering netdev in QEDE driver, from
Michal Kalderon.
5) Use after free in TUN driver ptr_ring usage, from Jason Wang.
6) Properly check for missing netlink attributes in SMC_PNETID
requests, from Eric Biggers.
7) Set DMA mask before performaing any DMA operations in vmxnet3
driver, from Regis Duchesne.
8) Fix mlx5 build with SMP=n, from Saeed Mahameed.
9) Classifier fixes in bcm_sf2 driver from Florian Fainelli.
10) Tuntap use after free during release, from Jason Wang.
11) Don't use stack memory in scatterlists in tls code, from Matt
Mullins.
12) Not fully initialized flow key object in ipv4 routing code, from
David Ahern.
13) Various packet headroom bug fixes in ip6_gre driver, from Petr
Machata.
14) Remove queues from XPS maps using correct index, from Amritha
Nambiar.
15) Fix use after free in sock_diag, from Eric Dumazet.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (64 commits)
net: ip6_gre: fix tunnel metadata device sharing.
cxgb4: fix offset in collecting TX rate limit info
net: sched: red: avoid hashing NULL child
sock_diag: fix use-after-free read in __sk_free
sh_eth: Change platform check to CONFIG_ARCH_RENESAS
net: dsa: Do not register devlink for unused ports
net: Fix a bug in removing queues from XPS map
bpf: fix truncated jump targets on heavy expansions
bpf: parse and verdict prog attach may race with bpf map update
bpf: sockmap update rollback on error can incorrectly dec prog refcnt
net: test tailroom before appending to linear skb
net: ip6_gre: Fix ip6erspan hlen calculation
net: ip6_gre: Split up ip6gre_changelink()
net: ip6_gre: Split up ip6gre_newlink()
net: ip6_gre: Split up ip6gre_tnl_change()
net: ip6_gre: Split up ip6gre_tnl_link_config()
net: ip6_gre: Fix headroom request in ip6erspan_tunnel_xmit()
net: ip6_gre: Request headroom in __gre6_xmit()
selftests/bpf: check return value of fopen in test_verifier.c
erspan: fix invalid erspan version.
...
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Currently ip6gre and ip6erspan share single metadata mode device,
using 'collect_md_tun'. Thus, when doing:
ip link add dev ip6gre11 type ip6gretap external
ip link add dev ip6erspan12 type ip6erspan external
RTNETLINK answers: File exists
simply fails due to the 2nd tries to create the same collect_md_tun.
The patch fixes it by adding a separate collect md tunnel device
for the ip6erspan, 'collect_md_tun_erspan'. As a result, a couple
of places need to refactor/split up in order to distinguish ip6gre
and ip6erspan.
First, move the collect_md check at ip6gre_tunnel_{unlink,link} and
create separate function {ip6gre,ip6ersapn}_tunnel_{link_md,unlink_md}.
Then before link/unlink, make sure the link_md/unlink_md is called.
Finally, a separate ndo_uninit is created for ip6erspan. Tested it
using the samples/bpf/test_tunnel_bpf.sh.
Fixes: ef7baf5e083c ("ip6_gre: add ip6 erspan collect_md mode")
Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Correct the indirect register offsets in collecting TX rate limit info
in UP CIM logs.
Also, T5 doesn't support these indirect register offsets, so remove
them from collection logic.
Fixes: be6e36d916b1 ("cxgb4: collect TX rate limit info in UP CIM logs")
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Hangbin reported an Oops triggered by the syzkaller qdisc rules:
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] SMP KASAN PTI
Modules linked in: sch_red
CPU: 0 PID: 28699 Comm: syz-executor5 Not tainted 4.17.0-rc4.kcov #1
Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
RIP: 0010:qdisc_hash_add+0x26/0xa0
RSP: 0018:ffff8800589cf470 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff824ad971
RDX: 0000000000000007 RSI: ffffc9000ce9f000 RDI: 000000000000003c
RBP: 0000000000000001 R08: ffffed000b139ea2 R09: ffff8800589cf4f0
R10: ffff8800589cf50f R11: ffffed000b139ea2 R12: ffff880054019fc0
R13: ffff880054019fb4 R14: ffff88005c0af600 R15: ffff880054019fb0
FS: 00007fa6edcb1700(0000) GS:ffff88005ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000740 CR3: 000000000fc16000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
red_change+0x2d2/0xed0 [sch_red]
qdisc_create+0x57e/0xef0
tc_modify_qdisc+0x47f/0x14e0
rtnetlink_rcv_msg+0x6a8/0x920
netlink_rcv_skb+0x2a2/0x3c0
netlink_unicast+0x511/0x740
netlink_sendmsg+0x825/0xc30
sock_sendmsg+0xc5/0x100
___sys_sendmsg+0x778/0x8e0
__sys_sendmsg+0xf5/0x1b0
do_syscall_64+0xbd/0x3b0
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x450869
RSP: 002b:00007fa6edcb0c48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa6edcb16b4 RCX: 0000000000450869
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000008778 R14: 0000000000702838 R15: 00007fa6edcb1700
Code: e9 0b fe ff ff 0f 1f 44 00 00 55 53 48 89 fb 89 f5 e8 3f 07 f3 fe 48 8d 7b 3c 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 51
RIP: qdisc_hash_add+0x26/0xa0 RSP: ffff8800589cf470
When a red qdisc is updated with a 0 limit, the child qdisc is left
unmodified, no additional scheduler is created in red_change(),
the 'child' local variable is rightfully NULL and must not add it
to the hash table.
This change addresses the above issue moving qdisc_hash_add() right
after the child qdisc creation. It additionally removes unneeded checks
for noop_qdisc.
Reported-by: Hangbin Liu <liuhangbin@gmail.com>
Fixes: 49b499718fa1 ("net: sched: make default fifo qdiscs appear in the dump")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We must not call sock_diag_has_destroy_listeners(sk) on a socket
that has no reference on net structure.
BUG: KASAN: use-after-free in sock_diag_has_destroy_listeners include/linux/sock_diag.h:75 [inline]
BUG: KASAN: use-after-free in __sk_free+0x329/0x340 net/core/sock.c:1609
Read of size 8 at addr ffff88018a02e3a0 by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.17.0-rc5+ #54
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1b9/0x294 lib/dump_stack.c:113
print_address_description+0x6c/0x20b mm/kasan/report.c:256
kasan_report_error mm/kasan/report.c:354 [inline]
kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
sock_diag_has_destroy_listeners include/linux/sock_diag.h:75 [inline]
__sk_free+0x329/0x340 net/core/sock.c:1609
sk_free+0x42/0x50 net/core/sock.c:1623
sock_put include/net/sock.h:1664 [inline]
reqsk_free include/net/request_sock.h:116 [inline]
reqsk_put include/net/request_sock.h:124 [inline]
inet_csk_reqsk_queue_drop_and_put net/ipv4/inet_connection_sock.c:672 [inline]
reqsk_timer_handler+0xe27/0x10e0 net/ipv4/inet_connection_sock.c:739
call_timer_fn+0x230/0x940 kernel/time/timer.c:1326
expire_timers kernel/time/timer.c:1363 [inline]
__run_timers+0x79e/0xc50 kernel/time/timer.c:1666
run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692
__do_softirq+0x2e0/0xaf5 kernel/softirq.c:285
invoke_softirq kernel/softirq.c:365 [inline]
irq_exit+0x1d1/0x200 kernel/softirq.c:405
exiting_irq arch/x86/include/asm/apic.h:525 [inline]
smp_apic_timer_interrupt+0x17e/0x710 arch/x86/kernel/apic/apic.c:1052
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
</IRQ>
RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:54
RSP: 0018:ffff8801d9ae7c38 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: dffffc0000000000 RBX: 1ffff1003b35cf8a RCX: 0000000000000000
RDX: 1ffffffff11a30d0 RSI: 0000000000000001 RDI: ffffffff88d18680
RBP: ffff8801d9ae7c38 R08: ffffed003b5e46c3 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: ffff8801d9ae7cf0 R14: ffffffff897bef20 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]
default_idle+0xc2/0x440 arch/x86/kernel/process.c:354
arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:345
default_idle_call+0x6d/0x90 kernel/sched/idle.c:93
cpuidle_idle_call kernel/sched/idle.c:153 [inline]
do_idle+0x395/0x560 kernel/sched/idle.c:262
cpu_startup_entry+0x104/0x120 kernel/sched/idle.c:368
start_secondary+0x426/0x5b0 arch/x86/kernel/smpboot.c:269
secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:242
Allocated by task 4557:
save_stack+0x43/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:490
kmem_cache_alloc+0x12e/0x760 mm/slab.c:3554
kmem_cache_zalloc include/linux/slab.h:691 [inline]
net_alloc net/core/net_namespace.c:383 [inline]
copy_net_ns+0x159/0x4c0 net/core/net_namespace.c:423
create_new_namespaces+0x69d/0x8f0 kernel/nsproxy.c:107
unshare_nsproxy_namespaces+0xc3/0x1f0 kernel/nsproxy.c:206
ksys_unshare+0x708/0xf90 kernel/fork.c:2408
__do_sys_unshare kernel/fork.c:2476 [inline]
__se_sys_unshare kernel/fork.c:2474 [inline]
__x64_sys_unshare+0x31/0x40 kernel/fork.c:2474
do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 69:
save_stack+0x43/0xd0 mm/kasan/kasan.c:448
set_track mm/kasan/kasan.c:460 [inline]
__kasan_slab_free+0x11a/0x170 mm/kasan/kasan.c:521
kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528
__cache_free mm/slab.c:3498 [inline]
kmem_cache_free+0x86/0x2d0 mm/slab.c:3756
net_free net/core/net_namespace.c:399 [inline]
net_drop_ns.part.14+0x11a/0x130 net/core/net_namespace.c:406
net_drop_ns net/core/net_namespace.c:405 [inline]
cleanup_net+0x6a1/0xb20 net/core/net_namespace.c:541
process_one_work+0xc1e/0x1b50 kernel/workqueue.c:2145
worker_thread+0x1cc/0x1440 kernel/workqueue.c:2279
kthread+0x345/0x410 kernel/kthread.c:240
ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412
The buggy address belongs to the object at ffff88018a02c140
which belongs to the cache net_namespace of size 8832
The buggy address is located 8800 bytes inside of
8832-byte region [ffff88018a02c140, ffff88018a02e3c0)
The buggy address belongs to the page:
page:ffffea0006280b00 count:1 mapcount:0 mapping:ffff88018a02c140 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffff88018a02c140 0000000000000000 0000000100000001
raw: ffffea00062a1320 ffffea0006268020 ffff8801d9bdde40 0000000000000000
page dumped because: kasan: bad access detected
Fixes: b922622ec6ef ("sock_diag: don't broadcast kernel sockets")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Craig Gallek <kraig@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since commit 9b5ba0df4ea4f940 ("ARM: shmobile: Introduce ARCH_RENESAS")
is CONFIG_ARCH_RENESAS a more appropriate platform check than the legacy
CONFIG_ARCH_SHMOBILE, hence use the former.
Renesas SuperH SH-Mobile SoCs are still covered by the CONFIG_CPU_SH4
check.
This will allow to drop ARCH_SHMOBILE on ARM and ARM64 in the near
future.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Even if commit 1d27732f411d ("net: dsa: setup and teardown ports") indicated
that registering a devlink instance for unused ports is not a problem, and this
is true, this can be confusing nonetheless, so let's not do it.
Fixes: 1d27732f411d ("net: dsa: setup and teardown ports")
Reported-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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While removing queues from the XPS map, the individual CPU ID
alone was used to index the CPUs map, this should be changed to also
factor in the traffic class mapping for the CPU-to-queue lookup.
Fixes: 184c449f91fe ("net: Add support for XPS with QoS via traffic classes")
Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
Acked-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Daniel Borkmann says:
====================
pull-request: bpf 2018-05-18
The following pull-request contains BPF updates for your *net* tree.
The main changes are:
1) Fix two bugs in sockmap, a use after free in sockmap's error path
from sock_map_ctx_update_elem() where we mistakenly drop a reference
we didn't take prior to that, and in the same function fix a race
in bpf_prog_inc_not_zero() where we didn't use the progs from prior
READ_ONCE(), from John.
2) Reject program expansions once we figure out that their jump target
which crosses patchlet boundaries could otherwise get truncated in
insn->off space, from Daniel.
3) Check the return value of fopen() in BPF selftest's test_verifier
where we determine whether unpriv BPF is disabled, and iff we do
fail there then just assume it is disabled. This fixes a segfault
when used with older kernels, from Jesper.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Recently during testing, I ran into the following panic:
[ 207.892422] Internal error: Accessing user space memory outside uaccess.h routines: 96000004 [#1] SMP
[ 207.901637] Modules linked in: binfmt_misc [...]
[ 207.966530] CPU: 45 PID: 2256 Comm: test_verifier Tainted: G W 4.17.0-rc3+ #7
[ 207.974956] Hardware name: FOXCONN R2-1221R-A4/C2U4N_MB, BIOS G31FB18A 03/31/2017
[ 207.982428] pstate: 60400005 (nZCv daif +PAN -UAO)
[ 207.987214] pc : bpf_skb_load_helper_8_no_cache+0x34/0xc0
[ 207.992603] lr : 0xffff000000bdb754
[ 207.996080] sp : ffff000013703ca0
[ 207.999384] x29: ffff000013703ca0 x28: 0000000000000001
[ 208.004688] x27: 0000000000000001 x26: 0000000000000000
[ 208.009992] x25: ffff000013703ce0 x24: ffff800fb4afcb00
[ 208.015295] x23: ffff00007d2f5038 x22: ffff00007d2f5000
[ 208.020599] x21: fffffffffeff2a6f x20: 000000000000000a
[ 208.025903] x19: ffff000009578000 x18: 0000000000000a03
[ 208.031206] x17: 0000000000000000 x16: 0000000000000000
[ 208.036510] x15: 0000ffff9de83000 x14: 0000000000000000
[ 208.041813] x13: 0000000000000000 x12: 0000000000000000
[ 208.047116] x11: 0000000000000001 x10: ffff0000089e7f18
[ 208.052419] x9 : fffffffffeff2a6f x8 : 0000000000000000
[ 208.057723] x7 : 000000000000000a x6 : 00280c6160000000
[ 208.063026] x5 : 0000000000000018 x4 : 0000000000007db6
[ 208.068329] x3 : 000000000008647a x2 : 19868179b1484500
[ 208.073632] x1 : 0000000000000000 x0 : ffff000009578c08
[ 208.078938] Process test_verifier (pid: 2256, stack limit = 0x0000000049ca7974)
[ 208.086235] Call trace:
[ 208.088672] bpf_skb_load_helper_8_no_cache+0x34/0xc0
[ 208.093713] 0xffff000000bdb754
[ 208.096845] bpf_test_run+0x78/0xf8
[ 208.100324] bpf_prog_test_run_skb+0x148/0x230
[ 208.104758] sys_bpf+0x314/0x1198
[ 208.108064] el0_svc_naked+0x30/0x34
[ 208.111632] Code: 91302260 f9400001 f9001fa1 d2800001 (29500680)
[ 208.117717] ---[ end trace 263cb8a59b5bf29f ]---
The program itself which caused this had a long jump over the whole
instruction sequence where all of the inner instructions required
heavy expansions into multiple BPF instructions. Additionally, I also
had BPF hardening enabled which requires once more rewrites of all
constant values in order to blind them. Each time we rewrite insns,
bpf_adj_branches() would need to potentially adjust branch targets
which cross the patchlet boundary to accommodate for the additional
delta. Eventually that lead to the case where the target offset could
not fit into insn->off's upper 0x7fff limit anymore where then offset
wraps around becoming negative (in s16 universe), or vice versa
depending on the jump direction.
Therefore it becomes necessary to detect and reject any such occasions
in a generic way for native eBPF and cBPF to eBPF migrations. For
the latter we can simply check bounds in the bpf_convert_filter()'s
BPF_EMIT_JMP helper macro and bail out once we surpass limits. The
bpf_patch_insn_single() for native eBPF (and cBPF to eBPF in case
of subsequent hardening) is a bit more complex in that we need to
detect such truncations before hitting the bpf_prog_realloc(). Thus
the latter is split into an extra pass to probe problematic offsets
on the original program in order to fail early. With that in place
and carefully tested I no longer hit the panic and the rewrites are
rejected properly. The above example panic I've seen on bpf-next,
though the issue itself is generic in that a guard against this issue
in bpf seems more appropriate in this case.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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In the sockmap design BPF programs (SK_SKB_STREAM_PARSER,
SK_SKB_STREAM_VERDICT and SK_MSG_VERDICT) are attached to the sockmap
map type and when a sock is added to the map the programs are used by
the socket. However, sockmap updates from both userspace and BPF
programs can happen concurrently with the attach and detach of these
programs.
To resolve this we use the bpf_prog_inc_not_zero and a READ_ONCE()
primitive to ensure the program pointer is not refeched and
possibly NULL'd before the refcnt increment. This happens inside
a RCU critical section so although the pointer reference in the map
object may be NULL (by a concurrent detach operation) the reference
from READ_ONCE will not be free'd until after grace period. This
ensures the object returned by READ_ONCE() is valid through the
RCU criticl section and safe to use as long as we "know" it may
be free'd shortly.
Daniel spotted a case in the sock update API where instead of using
the READ_ONCE() program reference we used the pointer from the
original map, stab->bpf_{verdict|parse|txmsg}. The problem with this
is the logic checks the object returned from the READ_ONCE() is not
NULL and then tries to reference the object again but using the
above map pointer, which may have already been NULL'd by a parallel
detach operation. If this happened bpf_porg_inc_not_zero could
dereference a NULL pointer.
Fix this by using variable returned by READ_ONCE() that is checked
for NULL.
Fixes: 2f857d04601a ("bpf: sockmap, remove STRPARSER map_flags and add multi-map support")
Reported-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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If the user were to only attach one of the parse or verdict programs
then it is possible a subsequent sockmap update could incorrectly
decrement the refcnt on the program. This happens because in the
rollback logic, after an error, we have to decrement the program
reference count when its been incremented. However, we only increment
the program reference count if the user has both a verdict and a
parse program. The reason for this is because, at least at the
moment, both are required for any one to be meaningful. The problem
fixed here is in the rollback path we decrement the program refcnt
even if only one existing. But we never incremented the refcnt in
the first place creating an imbalance.
This patch fixes the error path to handle this case.
Fixes: 2f857d04601a ("bpf: sockmap, remove STRPARSER map_flags and add multi-map support")
Reported-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Commit 0a6748740368 ("selftests/bpf: Only run tests if !bpf_disabled")
forgot to check return value of fopen.
This caused some confusion, when running test_verifier (from
tools/testing/selftests/bpf/) on an older kernel (< v4.4) as it will
simply seqfault.
This fix avoids the segfault and prints an error, but allow program to
continue. Given the sysctl was introduced in 1be7f75d1668 ("bpf:
enable non-root eBPF programs"), we know that the running kernel
cannot support unpriv, thus continue with unpriv_disabled = true.
Fixes: 0a6748740368 ("selftests/bpf: Only run tests if !bpf_disabled")
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
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Device features may change during transmission. In particular with
corking, a device may toggle scatter-gather in between allocating
and writing to an skb.
Do not unconditionally assume that !NETIF_F_SG at write time implies
that the same held at alloc time and thus the skb has sufficient
tailroom.
This issue predates git history.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Petr Machata says:
====================
net: ip6_gre: Fixes in headroom handling
This series mends some problems in headroom management in ip6_gre
module. The current code base has the following three closely-related
problems:
- ip6gretap tunnels neglect to ensure there's enough writable headroom
before pushing GRE headers.
- ip6erspan does this, but assumes that dev->needed_headroom is primed.
But that doesn't happen until ip6_tnl_xmit() is called later. Thus for
the first packet, ip6erspan actually behaves like ip6gretap above.
- ip6erspan shares some of the code with ip6gretap, including
calculations of needed header length. While there is custom
ERSPAN-specific code for calculating the headroom, the computed
values are overwritten by the ip6gretap code.
The first two issues lead to a kernel panic in situations where a packet
is mirrored from a veth device to the device in question. They are
fixed, respectively, in patches #1 and #2, which include the full panic
trace and a reproducer.
The rest of the patchset deals with the last issue. In patches #3 to #6,
several functions are split up into reusable parts. Finally in patch #7
these blocks are used to compose ERSPAN-specific callbacks where
necessary to fix the hlen calculation.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Even though ip6erspan_tap_init() sets up hlen and tun_hlen according to
what ERSPAN needs, it goes ahead to call ip6gre_tnl_link_config() which
overwrites these settings with GRE-specific ones.
Similarly for changelink callbacks, which are handled by
ip6gre_changelink() calls ip6gre_tnl_change() calls
ip6gre_tnl_link_config() as well.
The difference ends up being 12 vs. 20 bytes, and this is generally not
a problem, because a 12-byte request likely ends up allocating more and
the extra 8 bytes are thus available. However correct it is not.
So replace the newlink and changelink callbacks with an ERSPAN-specific
ones, reusing the newly-introduced _common() functions.
Fixes: 5a963eb61b7c ("ip6_gre: Add ERSPAN native tunnel support")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Extract from ip6gre_changelink() a reusable function
ip6gre_changelink_common(). This will allow introduction of
ERSPAN-specific _changelink() function with not a lot of code
duplication.
Fixes: 5a963eb61b7c ("ip6_gre: Add ERSPAN native tunnel support")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Extract from ip6gre_newlink() a reusable function
ip6gre_newlink_common(). The ip6gre_tnl_link_config() call needs to be
made customizable for ERSPAN, thus reorder it with calls to
ip6_tnl_change_mtu() and dev_hold(), and extract the whole tail to the
caller, ip6gre_newlink(). Thus enable an ERSPAN-specific _newlink()
function without a lot of duplicity.
Fixes: 5a963eb61b7c ("ip6_gre: Add ERSPAN native tunnel support")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Split a reusable function ip6gre_tnl_copy_tnl_parm() from
ip6gre_tnl_change(). This will allow ERSPAN-specific code to
reuse the common parts while customizing the behavior for ERSPAN.
Fixes: 5a963eb61b7c ("ip6_gre: Add ERSPAN native tunnel support")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The function ip6gre_tnl_link_config() is used for setting up
configuration of both ip6gretap and ip6erspan tunnels. Split the
function into the common part and the route-lookup part. The latter then
takes the calculated header length as an argument. This split will allow
the patches down the line to sneak in a custom header length computation
for the ERSPAN tunnel.
Fixes: 5a963eb61b7c ("ip6_gre: Add ERSPAN native tunnel support")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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dev->needed_headroom is not primed until ip6_tnl_xmit(), so it starts
out zero. Thus the call to skb_cow_head() fails to actually make sure
there's enough headroom to push the ERSPAN headers to. That can lead to
the panic cited below. (Reproducer below that).
Fix by requesting either needed_headroom if already primed, or just the
bare minimum needed for the header otherwise.
[ 190.703567] kernel BUG at net/core/skbuff.c:104!
[ 190.708384] invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
[ 190.714007] Modules linked in: act_mirred cls_matchall ip6_gre ip6_tunnel tunnel6 gre sch_ingress vrf veth x86_pkg_temp_thermal mlx_platform nfsd e1000e leds_mlxcpld
[ 190.728975] CPU: 1 PID: 959 Comm: kworker/1:2 Not tainted 4.17.0-rc4-net_master-custom-139 #10
[ 190.737647] Hardware name: Mellanox Technologies Ltd. "MSN2410-CB2F"/"SA000874", BIOS 4.6.5 03/08/2016
[ 190.747006] Workqueue: ipv6_addrconf addrconf_dad_work
[ 190.752222] RIP: 0010:skb_panic+0xc3/0x100
[ 190.756358] RSP: 0018:ffff8801d54072f0 EFLAGS: 00010282
[ 190.761629] RAX: 0000000000000085 RBX: ffff8801c1a8ecc0 RCX: 0000000000000000
[ 190.768830] RDX: 0000000000000085 RSI: dffffc0000000000 RDI: ffffed003aa80e54
[ 190.776025] RBP: ffff8801bd1ec5a0 R08: ffffed003aabce19 R09: ffffed003aabce19
[ 190.783226] R10: 0000000000000001 R11: ffffed003aabce18 R12: ffff8801bf695dbe
[ 190.790418] R13: 0000000000000084 R14: 00000000000006c0 R15: ffff8801bf695dc8
[ 190.797621] FS: 0000000000000000(0000) GS:ffff8801d5400000(0000) knlGS:0000000000000000
[ 190.805786] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 190.811582] CR2: 000055fa929aced0 CR3: 0000000003228004 CR4: 00000000001606e0
[ 190.818790] Call Trace:
[ 190.821264] <IRQ>
[ 190.823314] ? ip6erspan_tunnel_xmit+0x5e4/0x1982 [ip6_gre]
[ 190.828940] ? ip6erspan_tunnel_xmit+0x5e4/0x1982 [ip6_gre]
[ 190.834562] skb_push+0x78/0x90
[ 190.837749] ip6erspan_tunnel_xmit+0x5e4/0x1982 [ip6_gre]
[ 190.843219] ? ip6gre_tunnel_ioctl+0xd90/0xd90 [ip6_gre]
[ 190.848577] ? debug_check_no_locks_freed+0x210/0x210
[ 190.853679] ? debug_check_no_locks_freed+0x210/0x210
[ 190.858783] ? print_irqtrace_events+0x120/0x120
[ 190.863451] ? sched_clock_cpu+0x18/0x210
[ 190.867496] ? cyc2ns_read_end+0x10/0x10
[ 190.871474] ? skb_network_protocol+0x76/0x200
[ 190.875977] dev_hard_start_xmit+0x137/0x770
[ 190.880317] ? do_raw_spin_trylock+0x6d/0xa0
[ 190.884624] sch_direct_xmit+0x2ef/0x5d0
[ 190.888589] ? pfifo_fast_dequeue+0x3fa/0x670
[ 190.892994] ? pfifo_fast_change_tx_queue_len+0x810/0x810
[ 190.898455] ? __lock_is_held+0xa0/0x160
[ 190.902422] __qdisc_run+0x39e/0xfc0
[ 190.906041] ? _raw_spin_unlock+0x29/0x40
[ 190.910090] ? pfifo_fast_enqueue+0x24b/0x3e0
[ 190.914501] ? sch_direct_xmit+0x5d0/0x5d0
[ 190.918658] ? pfifo_fast_dequeue+0x670/0x670
[ 190.923047] ? __dev_queue_xmit+0x172/0x1770
[ 190.927365] ? preempt_count_sub+0xf/0xd0
[ 190.931421] __dev_queue_xmit+0x410/0x1770
[ 190.935553] ? ___slab_alloc+0x605/0x930
[ 190.939524] ? print_irqtrace_events+0x120/0x120
[ 190.944186] ? memcpy+0x34/0x50
[ 190.947364] ? netdev_pick_tx+0x1c0/0x1c0
[ 190.951428] ? __skb_clone+0x2fd/0x3d0
[ 190.955218] ? __copy_skb_header+0x270/0x270
[ 190.959537] ? rcu_read_lock_sched_held+0x93/0xa0
[ 190.964282] ? kmem_cache_alloc+0x344/0x4d0
[ 190.968520] ? cyc2ns_read_end+0x10/0x10
[ 190.972495] ? skb_clone+0x123/0x230
[ 190.976112] ? skb_split+0x820/0x820
[ 190.979747] ? tcf_mirred+0x554/0x930 [act_mirred]
[ 190.984582] tcf_mirred+0x554/0x930 [act_mirred]
[ 190.989252] ? tcf_mirred_act_wants_ingress.part.2+0x10/0x10 [act_mirred]
[ 190.996109] ? __lock_acquire+0x706/0x26e0
[ 191.000239] ? sched_clock_cpu+0x18/0x210
[ 191.004294] tcf_action_exec+0xcf/0x2a0
[ 191.008179] tcf_classify+0xfa/0x340
[ 191.011794] __netif_receive_skb_core+0x8e1/0x1c60
[ 191.016630] ? debug_check_no_locks_freed+0x210/0x210
[ 191.021732] ? nf_ingress+0x500/0x500
[ 191.025458] ? process_backlog+0x347/0x4b0
[ 191.029619] ? print_irqtrace_events+0x120/0x120
[ 191.034302] ? lock_acquire+0xd8/0x320
[ 191.038089] ? process_backlog+0x1b6/0x4b0
[ 191.042246] ? process_backlog+0xc2/0x4b0
[ 191.046303] process_backlog+0xc2/0x4b0
[ 191.050189] net_rx_action+0x5cc/0x980
[ 191.053991] ? napi_complete_done+0x2c0/0x2c0
[ 191.058386] ? mark_lock+0x13d/0xb40
[ 191.062001] ? clockevents_program_event+0x6b/0x1d0
[ 191.066922] ? print_irqtrace_events+0x120/0x120
[ 191.071593] ? __lock_is_held+0xa0/0x160
[ 191.075566] __do_softirq+0x1d4/0x9d2
[ 191.079282] ? ip6_finish_output2+0x524/0x1460
[ 191.083771] do_softirq_own_stack+0x2a/0x40
[ 191.087994] </IRQ>
[ 191.090130] do_softirq.part.13+0x38/0x40
[ 191.094178] __local_bh_enable_ip+0x135/0x190
[ 191.098591] ip6_finish_output2+0x54d/0x1460
[ 191.102916] ? ip6_forward_finish+0x2f0/0x2f0
[ 191.107314] ? ip6_mtu+0x3c/0x2c0
[ 191.110674] ? ip6_finish_output+0x2f8/0x650
[ 191.114992] ? ip6_output+0x12a/0x500
[ 191.118696] ip6_output+0x12a/0x500
[ 191.122223] ? ip6_route_dev_notify+0x5b0/0x5b0
[ 191.126807] ? ip6_finish_output+0x650/0x650
[ 191.131120] ? ip6_fragment+0x1a60/0x1a60
[ 191.135182] ? icmp6_dst_alloc+0x26e/0x470
[ 191.139317] mld_sendpack+0x672/0x830
[ 191.143021] ? igmp6_mcf_seq_next+0x2f0/0x2f0
[ 191.147429] ? __local_bh_enable_ip+0x77/0x190
[ 191.151913] ipv6_mc_dad_complete+0x47/0x90
[ 191.156144] addrconf_dad_completed+0x561/0x720
[ 191.160731] ? addrconf_rs_timer+0x3a0/0x3a0
[ 191.165036] ? mark_held_locks+0xc9/0x140
[ 191.169095] ? __local_bh_enable_ip+0x77/0x190
[ 191.173570] ? addrconf_dad_work+0x50d/0xa20
[ 191.177886] ? addrconf_dad_work+0x529/0xa20
[ 191.182194] addrconf_dad_work+0x529/0xa20
[ 191.186342] ? addrconf_dad_completed+0x720/0x720
[ 191.191088] ? __lock_is_held+0xa0/0x160
[ 191.195059] ? process_one_work+0x45d/0xe20
[ 191.199302] ? process_one_work+0x51e/0xe20
[ 191.203531] ? rcu_read_lock_sched_held+0x93/0xa0
[ 191.208279] process_one_work+0x51e/0xe20
[ 191.212340] ? pwq_dec_nr_in_flight+0x200/0x200
[ 191.216912] ? get_lock_stats+0x4b/0xf0
[ 191.220788] ? preempt_count_sub+0xf/0xd0
[ 191.224844] ? worker_thread+0x219/0x860
[ 191.228823] ? do_raw_spin_trylock+0x6d/0xa0
[ 191.233142] worker_thread+0xeb/0x860
[ 191.236848] ? process_one_work+0xe20/0xe20
[ 191.241095] kthread+0x206/0x300
[ 191.244352] ? process_one_work+0xe20/0xe20
[ 191.248587] ? kthread_stop+0x570/0x570
[ 191.252459] ret_from_fork+0x3a/0x50
[ 191.256082] Code: 14 3e ff 8b 4b 78 55 4d 89 f9 41 56 41 55 48 c7 c7 a0 cf db 82 41 54 44 8b 44 24 2c 48 8b 54 24 30 48 8b 74 24 20 e8 16 94 13 ff <0f> 0b 48 c7 c7 60 8e 1f 85 48 83 c4 20 e8 55 ef a6 ff 89 74 24
[ 191.275327] RIP: skb_panic+0xc3/0x100 RSP: ffff8801d54072f0
[ 191.281024] ---[ end trace 7ea51094e099e006 ]---
[ 191.285724] Kernel panic - not syncing: Fatal exception in interrupt
[ 191.292168] Kernel Offset: disabled
[ 191.295697] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---
Reproducer:
ip link add h1 type veth peer name swp1
ip link add h3 type veth peer name swp3
ip link set dev h1 up
ip address add 192.0.2.1/28 dev h1
ip link add dev vh3 type vrf table 20
ip link set dev h3 master vh3
ip link set dev vh3 up
ip link set dev h3 up
ip link set dev swp3 up
ip address add dev swp3 2001:db8:2::1/64
ip link set dev swp1 up
tc qdisc add dev swp1 clsact
ip link add name gt6 type ip6erspan \
local 2001:db8:2::1 remote 2001:db8:2::2 oseq okey 123
ip link set dev gt6 up
sleep 1
tc filter add dev swp1 ingress pref 1000 matchall skip_hw \
action mirred egress mirror dev gt6
ping -I h1 192.0.2.2
Fixes: e41c7c68ea77 ("ip6erspan: make sure enough headroom at xmit.")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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__gre6_xmit() pushes GRE headers before handing over to ip6_tnl_xmit()
for generic IP-in-IP processing. However it doesn't make sure that there
is enough headroom to push the header to. That can lead to the panic
cited below. (Reproducer below that).
Fix by requesting either needed_headroom if already primed, or just the
bare minimum needed for the header otherwise.
[ 158.576725] kernel BUG at net/core/skbuff.c:104!
[ 158.581510] invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
[ 158.587174] Modules linked in: act_mirred cls_matchall ip6_gre ip6_tunnel tunnel6 gre sch_ingress vrf veth x86_pkg_temp_thermal mlx_platform nfsd e1000e leds_mlxcpld
[ 158.602268] CPU: 1 PID: 16 Comm: ksoftirqd/1 Not tainted 4.17.0-rc4-net_master-custom-139 #10
[ 158.610938] Hardware name: Mellanox Technologies Ltd. "MSN2410-CB2F"/"SA000874", BIOS 4.6.5 03/08/2016
[ 158.620426] RIP: 0010:skb_panic+0xc3/0x100
[ 158.624586] RSP: 0018:ffff8801d3f27110 EFLAGS: 00010286
[ 158.629882] RAX: 0000000000000082 RBX: ffff8801c02cc040 RCX: 0000000000000000
[ 158.637127] RDX: 0000000000000082 RSI: dffffc0000000000 RDI: ffffed003a7e4e18
[ 158.644366] RBP: ffff8801bfec8020 R08: ffffed003aabce19 R09: ffffed003aabce19
[ 158.651574] R10: 000000000000000b R11: ffffed003aabce18 R12: ffff8801c364de66
[ 158.658786] R13: 000000000000002c R14: 00000000000000c0 R15: ffff8801c364de68
[ 158.666007] FS: 0000000000000000(0000) GS:ffff8801d5400000(0000) knlGS:0000000000000000
[ 158.674212] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.680036] CR2: 00007f4b3702dcd0 CR3: 0000000003228002 CR4: 00000000001606e0
[ 158.687228] Call Trace:
[ 158.689752] ? __gre6_xmit+0x246/0xd80 [ip6_gre]
[ 158.694475] ? __gre6_xmit+0x246/0xd80 [ip6_gre]
[ 158.699141] skb_push+0x78/0x90
[ 158.702344] __gre6_xmit+0x246/0xd80 [ip6_gre]
[ 158.706872] ip6gre_tunnel_xmit+0x3bc/0x610 [ip6_gre]
[ 158.711992] ? __gre6_xmit+0xd80/0xd80 [ip6_gre]
[ 158.716668] ? debug_check_no_locks_freed+0x210/0x210
[ 158.721761] ? print_irqtrace_events+0x120/0x120
[ 158.726461] ? sched_clock_cpu+0x18/0x210
[ 158.730572] ? sched_clock_cpu+0x18/0x210
[ 158.734692] ? cyc2ns_read_end+0x10/0x10
[ 158.738705] ? skb_network_protocol+0x76/0x200
[ 158.743216] ? netif_skb_features+0x1b2/0x550
[ 158.747648] dev_hard_start_xmit+0x137/0x770
[ 158.752010] sch_direct_xmit+0x2ef/0x5d0
[ 158.755992] ? pfifo_fast_dequeue+0x3fa/0x670
[ 158.760460] ? pfifo_fast_change_tx_queue_len+0x810/0x810
[ 158.765975] ? __lock_is_held+0xa0/0x160
[ 158.770002] __qdisc_run+0x39e/0xfc0
[ 158.773673] ? _raw_spin_unlock+0x29/0x40
[ 158.777781] ? pfifo_fast_enqueue+0x24b/0x3e0
[ 158.782191] ? sch_direct_xmit+0x5d0/0x5d0
[ 158.786372] ? pfifo_fast_dequeue+0x670/0x670
[ 158.790818] ? __dev_queue_xmit+0x172/0x1770
[ 158.795195] ? preempt_count_sub+0xf/0xd0
[ 158.799313] __dev_queue_xmit+0x410/0x1770
[ 158.803512] ? ___slab_alloc+0x605/0x930
[ 158.807525] ? ___slab_alloc+0x605/0x930
[ 158.811540] ? memcpy+0x34/0x50
[ 158.814768] ? netdev_pick_tx+0x1c0/0x1c0
[ 158.818895] ? __skb_clone+0x2fd/0x3d0
[ 158.822712] ? __copy_skb_header+0x270/0x270
[ 158.827079] ? rcu_read_lock_sched_held+0x93/0xa0
[ 158.831903] ? kmem_cache_alloc+0x344/0x4d0
[ 158.836199] ? skb_clone+0x123/0x230
[ 158.839869] ? skb_split+0x820/0x820
[ 158.843521] ? tcf_mirred+0x554/0x930 [act_mirred]
[ 158.848407] tcf_mirred+0x554/0x930 [act_mirred]
[ 158.853104] ? tcf_mirred_act_wants_ingress.part.2+0x10/0x10 [act_mirred]
[ 158.860005] ? __lock_acquire+0x706/0x26e0
[ 158.864162] ? mark_lock+0x13d/0xb40
[ 158.867832] tcf_action_exec+0xcf/0x2a0
[ 158.871736] tcf_classify+0xfa/0x340
[ 158.875402] __netif_receive_skb_core+0x8e1/0x1c60
[ 158.880334] ? nf_ingress+0x500/0x500
[ 158.884059] ? process_backlog+0x347/0x4b0
[ 158.888241] ? lock_acquire+0xd8/0x320
[ 158.892050] ? process_backlog+0x1b6/0x4b0
[ 158.896228] ? process_backlog+0xc2/0x4b0
[ 158.900291] process_backlog+0xc2/0x4b0
[ 158.904210] net_rx_action+0x5cc/0x980
[ 158.908047] ? napi_complete_done+0x2c0/0x2c0
[ 158.912525] ? rcu_read_unlock+0x80/0x80
[ 158.916534] ? __lock_is_held+0x34/0x160
[ 158.920541] __do_softirq+0x1d4/0x9d2
[ 158.924308] ? trace_event_raw_event_irq_handler_exit+0x140/0x140
[ 158.930515] run_ksoftirqd+0x1d/0x40
[ 158.934152] smpboot_thread_fn+0x32b/0x690
[ 158.938299] ? sort_range+0x20/0x20
[ 158.941842] ? preempt_count_sub+0xf/0xd0
[ 158.945940] ? schedule+0x5b/0x140
[ 158.949412] kthread+0x206/0x300
[ 158.952689] ? sort_range+0x20/0x20
[ 158.956249] ? kthread_stop+0x570/0x570
[ 158.960164] ret_from_fork+0x3a/0x50
[ 158.963823] Code: 14 3e ff 8b 4b 78 55 4d 89 f9 41 56 41 55 48 c7 c7 a0 cf db 82 41 54 44 8b 44 24 2c 48 8b 54 24 30 48 8b 74 24 20 e8 16 94 13 ff <0f> 0b 48 c7 c7 60 8e 1f 85 48 83 c4 20 e8 55 ef a6 ff 89 74 24
[ 158.983235] RIP: skb_panic+0xc3/0x100 RSP: ffff8801d3f27110
[ 158.988935] ---[ end trace 5af56ee845aa6cc8 ]---
[ 158.993641] Kernel panic - not syncing: Fatal exception in interrupt
[ 159.000176] Kernel Offset: disabled
[ 159.003767] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---
Reproducer:
ip link add h1 type veth peer name swp1
ip link add h3 type veth peer name swp3
ip link set dev h1 up
ip address add 192.0.2.1/28 dev h1
ip link add dev vh3 type vrf table 20
ip link set dev h3 master vh3
ip link set dev vh3 up
ip link set dev h3 up
ip link set dev swp3 up
ip address add dev swp3 2001:db8:2::1/64
ip link set dev swp1 up
tc qdisc add dev swp1 clsact
ip link add name gt6 type ip6gretap \
local 2001:db8:2::1 remote 2001:db8:2::2
ip link set dev gt6 up
sleep 1
tc filter add dev swp1 ingress pref 1000 matchall skip_hw \
action mirred egress mirror dev gt6
ping -I h1 192.0.2.2
Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Acked-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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ERSPAN only support version 1 and 2. When packets send to an
erspan device which does not have proper version number set,
drop the packet. In real case, we observe multicast packets
sent to the erspan pernet device, erspan0, which does not have
erspan version configured.
Reported-by: Greg Rose <gvrose8192@gmail.com>
Signed-off-by: William Tu <u9012063@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Thomas Falcon says:
====================
ibmvnic: Fix bugs and memory leaks
This is a small patch series fixing up some bugs and memory leaks
in the ibmvnic driver. The first fix frees up previously allocated
memory that should be freed in case of an error. The second fixes
a reset case that was failing due to TX/RX queue IRQ's being
erroneously disabled without being enabled again. The final patch
fixes incorrect reallocated of statistics buffers during a device
reset, resulting in loss of statistics information and a memory leak.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Move initialization of statistics buffers from ibmvnic_init function
into ibmvnic_probe. In the current state, ibmvnic_init will be called
again during a device reset, resulting in the allocation of new
buffers without freeing the old ones.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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It is not necessary to disable interrupt lines here during a reset
to handle a non-fatal firmware error. Move that call within the code
block that handles the other cases that do require interrupts to be
disabled and re-enabled.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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If the firmware map fails for whatever reason, remember to free
up the memory after.
Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Updating the FIB tracepoint for the recent change to allow rules using
the protocol and ports exposed a few places where the entries in the flow
struct are not initialized.
For __fib_validate_source add the call to fib4_rules_early_flow_dissect
since it is invoked for the input path. For netfilter, add the memset on
the flow struct to avoid future problems like this. In ip_route_input_slow
need to set the fields if the skb dissection does not happen.
Fixes: bfff4862653b ("net: fib_rules: support for match on ip_proto, sport and dport")
Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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scatterlist code expects virt_to_page() to work, which fails with
CONFIG_VMAP_STACK=y.
Fixes: c46234ebb4d1e ("tls: RX path for ktls")
Signed-off-by: Matt Mullins <mmullins@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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After commit b196d88aba8a ("tun: fix use after free for ptr_ring") we
need clean up tx ring during release(). But unfortunately, it tries to
do the cleanup blindly after socket were destroyed which will lead
another use-after-free. Fix this by doing the cleanup before dropping
the last reference of the socket in __tun_detach().
Reported-by: Andrei Vagin <avagin@virtuozzo.com>
Acked-by: Andrei Vagin <avagin@virtuozzo.com>
Fixes: b196d88aba8a ("tun: fix use after free for ptr_ring")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Michal Kalderon says:
====================
qed: LL2 fixes
This series fixes some issues in ll2 related to synchronization
and resource freeing
====================
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Stress on qedi/qedr load unload lead to list_del corruption.
This is due to ll2 connection terminate freeing resources without
verifying that no more ll2 processing will occur.
This patch unregisters the ll2 status block before terminating
the connection to assure this race does not occur.
Fixes: 1d6cff4fca4366 ("qed: Add iSCSI out of order packet handling")
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The ll2 flows of flushing the txq/rxq need to be synchronized with the
regular fp processing. Caused list corruption during load/unload stress
tests.
Fixes: 0a7fb11c23c0f ("qed: Add Light L2 support")
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Driver should free all pending isles once it gets a FLUSH cqe from FW.
Part of iSCSI out of order flow.
Fixes: 1d6cff4fca4366 ("qed: Add iSCSI out of order packet handling")
Signed-off-by: Ariel Elior <Ariel.Elior@cavium.com>
Signed-off-by: Michal Kalderon <Michal.Kalderon@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Similarly to what was done with commit a52956dfc503 ("net sched actions:
fix refcnt leak in skbmod"), fix the error path of tcf_vlan_init() to avoid
refcnt leaks when wrong value of TCA_VLAN_PUSH_VLAN_PROTOCOL is given.
Fixes: 5026c9b1bafc ("net sched: vlan action fix late binding")
CC: Roman Mashak <mrv@mojatatu.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The configuration settings for RBTX4927 were accidentally removed,
leading to a silently broken network interface.
Re-add the missing settings to fix this.
Fixes: 8eb97ff5a4ec941d ("net: 8390: remove m32r specific bits")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Florian Fainelli says:
====================
net: dsa: bcm_sf2: CFP fixes
This patch series fixes a number of usability issues with the SF2 Compact Field
Processor code:
- we would not be properly bound checking the location when we let the kernel
automatically place rules with RX_CLS_LOC_ANY
- when using IPv6 rules and user space specifies a location identifier we
would be off by one in what the chain ID (within the Broadcom tag) indicates
- it would be possible to delete one of the two slices of an IPv6 while leaving
the other one programming leading to various problems
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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It was possible to delete only one half of an IPv6, which would leave
the second half still programmed and possibly in use. Instead of
checking for the unused bitmap, we need to check the unique bitmap, and
refuse any deletion that does not match that criteria. We also need to
move that check from bcm_sf2_cfp_rule_del_one() into its caller:
bcm_sf2_cfp_rule_del() otherwise we would not be able to delete second
halves anymore that would not pass the first test.
Fixes: ba0696c22e7c ("net: dsa: bcm_sf2: Add support for IPv6 CFP rules")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We had several issues that would make the programming of IPv6 rules both
inconsistent and error prone:
- the chain ID that we would be asking the hardware to put in the
packet's Broadcom tag would be off by one, it would return one of the
two indexes, but not the one user-space specified
- when an user specified a particular location to insert a CFP rule at,
we would not be returning the same index, which would be confusing if
nothing else
- finally, like IPv4, it would be possible to overflow the last entry by
re-programming it
Fix this by swapping the usage of rule_index[0] and rule_index[1] where
relevant in order to return a consistent and correct user-space
experience.
Fixes: ba0696c22e7c ("net: dsa: bcm_sf2: Add support for IPv6 CFP rules")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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When we let the kernel pick up a rule location with RX_CLS_LOC_ANY, we
would be able to overwrite the last rules because of a number of issues.
The IPv4 code path would not be checking that rule_index is within
bounds, and it would also only be allowed to pick up rules from range
0..126 instead of the full 0..127 range. This would lead us to allow
overwriting the last rule when we let the kernel pick-up the location.
Fixes: 3306145866b6 ("net: dsa: bcm_sf2: Move IPv4 CFP processing to specific functions")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The micrel KSZ9031 phy has a optional clock pin (CLK125_NDO) which can be
used as reference clock for the MAC unit. The clock signal must meet the
RGMII requirements to ensure the correct data transmission between the
MAC and the PHY. The KSZ9031 phy does not fulfill the duty cycle
requirement if the phy is configured as slave. For a complete
describtion look at the errata sheets: DS80000691D or DS80000692D.
The errata sheet recommends to force the phy into master mode whenever
there is a 1000Base-T link-up as work around. Only set the
"micrel,force-master" property if you use the phy reference clock provided
by CLK125_NDO pin as MAC reference clock in your application.
Attenation, this workaround is only usable if the link partner can
be configured to slave mode for 1000Base-T.
Signed-off-by: Markus Niebel <Markus.Niebel@tqs.de>
[m.felsch@pengutronix.de: fix dt-binding documentation]
[m.felsch@pengutronix.de: use already existing result var for read/write]
[m.felsch@pengutronix.de: add error handling]
[m.felsch@pengutronix.de: add more comments]
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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syzkaller found a reliable way to crash the host, hitting a BUG()
in __tcp_retransmit_skb()
Malicous MSG_FASTOPEN is the root cause. We need to purge write queue
in tcp_connect_init() at the point we init snd_una/write_seq.
This patch also replaces the BUG() by a less intrusive WARN_ON_ONCE()
kernel BUG at net/ipv4/tcp_output.c:2837!
invalid opcode: 0000 [#1] SMP KASAN
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in:
CPU: 0 PID: 5276 Comm: syz-executor0 Not tainted 4.17.0-rc3+ #51
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__tcp_retransmit_skb+0x2992/0x2eb0 net/ipv4/tcp_output.c:2837
RSP: 0000:ffff8801dae06ff8 EFLAGS: 00010206
RAX: ffff8801b9fe61c0 RBX: 00000000ffc18a16 RCX: ffffffff864e1a49
RDX: 0000000000000100 RSI: ffffffff864e2e12 RDI: 0000000000000005
RBP: ffff8801dae073a0 R08: ffff8801b9fe61c0 R09: ffffed0039c40dd2
R10: ffffed0039c40dd2 R11: ffff8801ce206e93 R12: 00000000421eeaad
R13: ffff8801ce206d4e R14: ffff8801ce206cc0 R15: ffff8801cd4f4a80
FS: 0000000000000000(0000) GS:ffff8801dae00000(0063) knlGS:00000000096bc900
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000020000000 CR3: 00000001c47b6000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
tcp_retransmit_skb+0x2e/0x250 net/ipv4/tcp_output.c:2923
tcp_retransmit_timer+0xc50/0x3060 net/ipv4/tcp_timer.c:488
tcp_write_timer_handler+0x339/0x960 net/ipv4/tcp_timer.c:573
tcp_write_timer+0x111/0x1d0 net/ipv4/tcp_timer.c:593
call_timer_fn+0x230/0x940 kernel/time/timer.c:1326
expire_timers kernel/time/timer.c:1363 [inline]
__run_timers+0x79e/0xc50 kernel/time/timer.c:1666
run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692
__do_softirq+0x2e0/0xaf5 kernel/softirq.c:285
invoke_softirq kernel/softirq.c:365 [inline]
irq_exit+0x1d1/0x200 kernel/softirq.c:405
exiting_irq arch/x86/include/asm/apic.h:525 [inline]
smp_apic_timer_interrupt+0x17e/0x710 arch/x86/kernel/apic/apic.c:1052
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
Fixes: cf60af03ca4e ("net-tcp: Fast Open client - sendmsg(MSG_FASTOPEN)")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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