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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2009-11-16 15:42:18 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-16 16:09:52 +0100 |
| commit | 3c93ca00eeeb774c7dd666cc7286a9e90c53e998 (patch) | |
| tree | 5f89fe4a22ab1394278e3fc4e9698b0c2327a97b /arch/x86/lib | |
| parent | 14722485830fe6baba738b91d96f06fbd6cf7a18 (diff) | |
| download | op-kernel-dev-3c93ca00eeeb774c7dd666cc7286a9e90c53e998.zip op-kernel-dev-3c93ca00eeeb774c7dd666cc7286a9e90c53e998.tar.gz | |
x86: Add missing might_fault() checks to copy_{to,from}_user()
On x86-64, copy_[to|from]_user() rely on assembly routines that
never call might_fault(), making us missing various lockdep
checks.
This doesn't apply to __copy_from,to_user() that explicitly
handle these calls, neither is it a problem in x86-32 where
copy_to,from_user() rely on the "__" prefixed versions that
also call might_fault().
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Nick Piggin <npiggin@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1258382538-30979-1-git-send-email-fweisbec@gmail.com>
[ v2: fix module export ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/lib')
| -rw-r--r-- | arch/x86/lib/copy_user_64.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/lib/copy_user_64.S b/arch/x86/lib/copy_user_64.S index 3936998..cf889d4 100644 --- a/arch/x86/lib/copy_user_64.S +++ b/arch/x86/lib/copy_user_64.S @@ -65,7 +65,7 @@ .endm /* Standard copy_to_user with segment limit checking */ -ENTRY(copy_to_user) +ENTRY(_copy_to_user) CFI_STARTPROC GET_THREAD_INFO(%rax) movq %rdi,%rcx @@ -75,7 +75,7 @@ ENTRY(copy_to_user) jae bad_to_user ALTERNATIVE_JUMP X86_FEATURE_REP_GOOD,copy_user_generic_unrolled,copy_user_generic_string CFI_ENDPROC -ENDPROC(copy_to_user) +ENDPROC(_copy_to_user) /* Standard copy_from_user with segment limit checking */ ENTRY(_copy_from_user) |
