Messages in this thread Patch in this message | | | Date | Thu, 31 Jan 2013 03:07:20 -0800 | From | tip-bot for Jan Beulich <> | Subject | [tip:x86/urgent] x86-64: Replace left over sti/ cli in ia32 audit exit code |
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Commit-ID: 40a1ef95da85843696fc3ebe5fce39b0db32669f Gitweb: http://git.kernel.org/tip/40a1ef95da85843696fc3ebe5fce39b0db32669f Author: Jan Beulich <JBeulich@suse.com> AuthorDate: Wed, 30 Jan 2013 07:55:53 +0000 Committer: Ingo Molnar <mingo@kernel.org> CommitDate: Thu, 31 Jan 2013 10:36:01 +0100
x86-64: Replace left over sti/cli in ia32 audit exit code
For some reason they didn't get replaced so far by their paravirt equivalents, resulting in code to be run with interrupts disabled that doesn't expect so (causing, in the observed case, a BUG_ON() to trigger) when syscall auditing is enabled.
David (Cc-ed) came up with an identical fix, so likely this can be taken to count as an ack from him.
Reported-by: Peter Moody <pmoody@google.com> Signed-off-by: Jan Beulich <jbeulich@suse.com> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Link: http://lkml.kernel.org/r/5108E01902000078000BA9C5@nat28.tlf.novell.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: stable@vger.kernel.org Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: David Vrabel <david.vrabel@citrix.com> Tested-by: Peter Moody <pmoody@google.com> --- arch/x86/ia32/ia32entry.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S index 102ff7c..142c4ce 100644 --- a/arch/x86/ia32/ia32entry.S +++ b/arch/x86/ia32/ia32entry.S @@ -207,7 +207,7 @@ sysexit_from_sys_call: testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT),TI_flags+THREAD_INFO(%rsp,RIP-ARGOFFSET) jnz ia32_ret_from_sys_call TRACE_IRQS_ON - sti + ENABLE_INTERRUPTS(CLBR_NONE) movl %eax,%esi /* second arg, syscall return value */ cmpl $-MAX_ERRNO,%eax /* is it an error ? */ jbe 1f @@ -217,7 +217,7 @@ sysexit_from_sys_call: call __audit_syscall_exit movq RAX-ARGOFFSET(%rsp),%rax /* reload syscall return value */ movl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT),%edi - cli + DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF testl %edi,TI_flags+THREAD_INFO(%rsp,RIP-ARGOFFSET) jz \exit
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