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Date: Sun, 7 Aug 2022 21:38:58 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Francis Laniel <flaniel@...ux.microsoft.com>, Will Deacon <will@...nel.org>, Sasha Levin <sashal@...nel.org>, catalin.marinas@....com, broonie@...nel.org, keescook@...omium.org, peterz@...radead.org, christophe.leroy@...roup.eu, mark.rutland@....com, linux-arm-kernel@...ts.infradead.org Subject: [PATCH AUTOSEL 4.19 01/16] arm64: Do not forget syscall when starting a new thread. From: Francis Laniel <flaniel@...ux.microsoft.com> [ Upstream commit de6921856f99c11d3986c6702d851e1328d4f7f6 ] Enable tracing of the execve*() system calls with the syscalls:sys_exit_execve tracepoint by removing the call to forget_syscall() when starting a new thread and preserving the value of regs->syscallno across exec. Signed-off-by: Francis Laniel <flaniel@...ux.microsoft.com> Link: https://lore.kernel.org/r/20220608162447.666494-2-flaniel@linux.microsoft.com Signed-off-by: Will Deacon <will@...nel.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- arch/arm64/include/asm/processor.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h index 773ea8e0e442..f81074c68ff3 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -172,8 +172,9 @@ void tls_preserve_current_state(void); static inline void start_thread_common(struct pt_regs *regs, unsigned long pc) { + s32 previous_syscall = regs->syscallno; memset(regs, 0, sizeof(*regs)); - forget_syscall(regs); + regs->syscallno = previous_syscall; regs->pc = pc; } -- 2.35.1
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