diff options
author | Sergey Matyukevich <sergey.matyukevich@synopsys.com> | 2022-04-14 11:17:22 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-27 14:41:15 +0200 |
commit | 74364b41fe6a6dc4bd902ed67e952d1d08e2233b (patch) | |
tree | a92b5d798a92875caf9a28adcd33a648a1b6248a | |
parent | f13ab82aeb2fc4b21a7ca2d79256cf0ccaa76bd8 (diff) |
ARC: entry: fix syscall_trace_exit argument
commit b1c6ecfdd06907554518ec384ce8e99889d15193 upstream.
Function syscall_trace_exit expects pointer to pt_regs. However
r0 is also used to keep syscall return value. Restore pointer
to pt_regs before calling syscall_trace_exit.
Cc: <stable@vger.kernel.org>
Signed-off-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | arch/arc/kernel/entry.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arc/kernel/entry.S b/arch/arc/kernel/entry.S index dd77a0c8f740..66ba549b520f 100644 --- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -196,6 +196,7 @@ tracesys_exit: st r0, [sp, PT_r0] ; sys call return value in pt_regs ;POST Sys Call Ptrace Hook + mov r0, sp ; pt_regs needed bl @syscall_trace_exit b ret_from_exception ; NOT ret_from_system_call at is saves r0 which ; we'd done before calling post hook above |