Re: [PATCH 1/4] arm64: expose orig_x0 in the user_pt_regs structure
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2021-03-26 18:29:32
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lkml
On Mon, Mar 22, 2021 at 03:50:50PM -0700, Andrei Vagin wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/arm64/include/uapi/asm/ptrace.h b/arch/arm64/include/uapi/asm/ptrace.h index 758ae984ff97..3c118c5b0893 100644 --- a/arch/arm64/include/uapi/asm/ptrace.h +++ b/arch/arm64/include/uapi/asm/ptrace.h@@ -90,6 +90,7 @@ struct user_pt_regs { __u64 sp; __u64 pc; __u64 pstate; + __u64 orig_x0; };
That's a UAPI change, likely to go wrong. For example, a ptrace(PTRACE_GETREGSET, pid, REGSET_GPR, data) would write past the end of an old struct user_pt_regs in the debugger. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel