On Wed, Mar 25, 2015 at 10:18 AM, Denys Vlasenko <[email protected]> wrote: > The $AUDIT_ARCH_X86_64 parameter to syscall_trace_enter_phase1/2 > is a 32-bit constant, loading it with 32-bit MOV produces 5-byte insn > instead of 10-byte one.
Acked-by: Andy Lutomirski <[email protected]> > > Signed-off-by: Denys Vlasenko <[email protected]> > CC: Linus Torvalds <[email protected]> > CC: Steven Rostedt <[email protected]> > CC: Ingo Molnar <[email protected]> > CC: Borislav Petkov <[email protected]> > CC: "H. Peter Anvin" <[email protected]> > CC: Andy Lutomirski <[email protected]> > CC: Oleg Nesterov <[email protected]> > CC: Frederic Weisbecker <[email protected]> > CC: Alexei Starovoitov <[email protected]> > CC: Will Drewry <[email protected]> > CC: Kees Cook <[email protected]> > CC: [email protected] > CC: [email protected] > --- > arch/x86/kernel/entry_64.S | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S > index 11b7339..23aa43e 100644 > --- a/arch/x86/kernel/entry_64.S > +++ b/arch/x86/kernel/entry_64.S > @@ -306,7 +306,7 @@ system_call_fastpath: > /* Do syscall entry tracing */ > tracesys: > movq %rsp, %rdi > - movq $AUDIT_ARCH_X86_64, %rsi > + movl $AUDIT_ARCH_X86_64, %esi > call syscall_trace_enter_phase1 > test %rax, %rax > jnz tracesys_phase2 /* if needed, run the slow path */ > @@ -317,7 +317,7 @@ tracesys: > tracesys_phase2: > SAVE_EXTRA_REGS > movq %rsp, %rdi > - movq $AUDIT_ARCH_X86_64, %rsi > + movl $AUDIT_ARCH_X86_64, %esi > movq %rax,%rdx > call syscall_trace_enter_phase2 > > -- > 1.8.1.4 > -- Andy Lutomirski AMA Capital Management, LLC -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
