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| author | Richard Weinberger <richard@nod.at> | 2016-06-12 22:03:16 +0200 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2016-08-04 00:17:58 +0200 |
| commit | 57a05d83b16710aff30510c33768df7ab17e0b4a (patch) | |
| tree | b8535f4cb6462564b41c8e8deedde84868991874 /arch/um | |
| parent | 5609a3d309836d047eb60275db69d82d47268283 (diff) | |
| download | linux-57a05d83b16710aff30510c33768df7ab17e0b4a.tar.gz linux-57a05d83b16710aff30510c33768df7ab17e0b4a.tar.xz | |
um: Fix possible deadlock in sig_handler_common()
We are in atomic context and must not sleep.
Sleeping here is possible since malloc() maps
to kmalloc() with GFP_KERNEL.
Cc: stable@vger.kernel.org
Fixes: b6024b21 ("um: extend fpstate to _xstate to support YMM registers")
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/os-Linux/signal.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c index 8acaf4e384c0..a86d7cc2c2d8 100644 --- a/arch/um/os-Linux/signal.c +++ b/arch/um/os-Linux/signal.c @@ -15,6 +15,7 @@ #include <kern_util.h> #include <os.h> #include <sysdep/mcontext.h> +#include <um_malloc.h> void (*sig_info[NSIG])(int, struct siginfo *, struct uml_pt_regs *) = { [SIGTRAP] = relay_signal, @@ -32,7 +33,7 @@ static void sig_handler_common(int sig, struct siginfo *si, mcontext_t *mc) struct uml_pt_regs *r; int save_errno = errno; - r = malloc(sizeof(struct uml_pt_regs)); + r = uml_kmalloc(sizeof(struct uml_pt_regs), UM_GFP_ATOMIC); if (!r) panic("out of memory"); @@ -91,7 +92,7 @@ static void timer_real_alarm_handler(mcontext_t *mc) { struct uml_pt_regs *regs; - regs = malloc(sizeof(struct uml_pt_regs)); + regs = uml_kmalloc(sizeof(struct uml_pt_regs), UM_GFP_ATOMIC); if (!regs) panic("out of memory"); |