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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2018-11-28 23:20:11 +0100 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2018-12-03 19:15:32 +0100 |
| commit | 6637401c35b2f327a35d27f44bda05e327f2f017 (patch) | |
| tree | d9a2a4d3782dab5b55273a7a035500af279545f8 /arch/x86/include/asm | |
| parent | 1a4226efaf808fe9079ea3b29919883008918297 (diff) | |
| download | linux-0-day-6637401c35b2f327a35d27f44bda05e327f2f017.tar.gz linux-0-day-6637401c35b2f327a35d27f44bda05e327f2f017.tar.xz | |
x86/fpu: Add might_fault() to user_insn()
Every user of user_insn() passes an user memory pointer to this macro.
Add might_fault() to user_insn() so we can spot users which are using
this macro in sections where page faulting is not allowed.
[ bp: Space it out to make it more visible. ]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Rik van Riel <riel@surriel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: kvm ML <kvm@vger.kernel.org>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20181128222035.2996-6-bigeasy@linutronix.de
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/fpu/internal.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h index 69dcdf195b611..fa2c93cb42a27 100644 --- a/arch/x86/include/asm/fpu/internal.h +++ b/arch/x86/include/asm/fpu/internal.h @@ -106,6 +106,9 @@ extern void fpstate_sanitize_xstate(struct fpu *fpu); #define user_insn(insn, output, input...) \ ({ \ int err; \ + \ + might_fault(); \ + \ asm volatile(ASM_STAC "\n" \ "1:" #insn "\n\t" \ "2: " ASM_CLAC "\n" \ |