| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 64/86] ARC: entry: fix syscall_trace_exit argument | Date | Tue, 26 Apr 2022 10:21:32 +0200 |
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From: Sergey Matyukevich <sergey.matyukevich@synopsys.com>
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> --- arch/arc/kernel/entry.S | 1 + 1 file changed, 1 insertion(+)
--- a/arch/arc/kernel/entry.S +++ b/arch/arc/kernel/entry.S @@ -199,6 +199,7 @@ 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
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