-stable review patch. If anyone has any objections, please let us know.
------------------
From: Andi Kleen <[email protected]>
This fixes a regression from the earlier DOS fix for non canonical
IRET addresses. It broke UML.
int_ret_from_syscall already does syscall exit tracing, so
no need to do it again in the caller.
This caused problems for UML and some other special programs doing
syscall interception.
Signed-off-by: Andi Kleen <[email protected]>
Signed-off-by: Chris Wright <[email protected]>
---
arch/x86_64/kernel/entry.S | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
--- linux-2.6.16.19.orig/arch/x86_64/kernel/entry.S
+++ linux-2.6.16.19/arch/x86_64/kernel/entry.S
@@ -281,12 +281,7 @@ tracesys:
ja 1f
movq %r10,%rcx /* fixup for C */
call *sys_call_table(,%rax,8)
- movq %rax,RAX-ARGOFFSET(%rsp)
-1: SAVE_REST
- movq %rsp,%rdi
- call syscall_trace_leave
- RESTORE_TOP_OF_STACK %rbx
- RESTORE_REST
+1: movq %rax,RAX-ARGOFFSET(%rsp)
/* Use IRET because user could have changed frame */
jmp int_ret_from_sys_call
CFI_ENDPROC
--
-
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