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arm64: Mark start_backtrace() notrace and NOKPROBE_SYMBOL

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[ Upstream commit 1e0924bd09916fab795fc2a21ec1d148f24299fd ]

Mark the start_backtrace() as notrace and NOKPROBE_SYMBOL
because this function is called from ftrace and lockdep to
get the caller address via return_address(). The lockdep
is used in kprobes, it should also be NOKPROBE_SYMBOL.

Fixes: b07f349966 ("arm64: stacktrace: Move start_backtrace() out of the header")
Cc: <stable@vger.kernel.org> # 5.13.x
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/164301227374.1433152.12808232644267107415.stgit@devnote2
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Masami Hiramatsu
2022-01-24 17:17:54 +09:00
committed by Greg Kroah-Hartman
parent 60e6d58ef9
commit 1921d1fd0e
1 changed files with 2 additions and 1 deletions
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3
arch/arm64/kernel/stacktrace.c
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@@ -33,7 +33,7 @@
*/
void start_backtrace(struct stackframe *frame, unsigned long fp,
notrace void start_backtrace(struct stackframe *frame, unsigned long fp,
unsigned long pc)
{
frame->fp = fp;
@@ -55,6 +55,7 @@ void start_backtrace(struct stackframe *frame, unsigned long fp,
frame->prev_fp = 0;
frame->prev_type = STACK_TYPE_UNKNOWN;
}
NOKPROBE_SYMBOL(start_backtrace);
/*
* Unwind from one frame record (A) to the next frame record (B).