diff options
| author | Mark Rutland <mark.rutland@arm.com> | 2025-05-21 12:09:59 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-20 18:30:36 +0200 |
| commit | a2bdd6e3e5ab525bcbadef177041a15621c9a9bf (patch) | |
| tree | df8359abe1b47b222bd85e96ebf57b2f114db4aa | |
| parent | c500a13fd6cff0cf047c672da126b386e6d32740 (diff) | |
arm64: stacktrace: Check kretprobe_find_ret_addr() return value
[ Upstream commit beecfd6a88a675e20987e70ec532ba734b230fa4 ]
If kretprobe_find_ret_addr() fails to find the original return address,
it returns 0. Check for this case so that a reliable stacktrace won't
silently ignore it.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Andrea della Porta <andrea.porta@suse.com>
Cc: Breno Leitao <leitao@debian.org>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Miroslav Benes <mbenes@suse.cz>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Song Liu <song@kernel.org>
Cc: Will Deacon <will@kernel.org>
Reviewed-and-tested-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20250521111000.2237470-2-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | arch/arm64/kernel/stacktrace.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c index 2729faaee4b4..1d60a08a2184 100644 --- a/arch/arm64/kernel/stacktrace.c +++ b/arch/arm64/kernel/stacktrace.c @@ -123,6 +123,8 @@ kunwind_recover_return_address(struct kunwind_state *state) orig_pc = kretprobe_find_ret_addr(state->task, (void *)state->common.fp, &state->kr_cur); + if (!orig_pc) + return -EINVAL; state->common.pc = orig_pc; } #endif /* CONFIG_KRETPROBES */ |