diff options
| author | Mark Rutland <mark.rutland@arm.com> | 2025-05-21 12:09:59 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2025-06-20 13:10:09 +0100 |
| commit | beecfd6a88a675e20987e70ec532ba734b230fa4 (patch) | |
| tree | 69419b3c9f084552550c48b6b429e4aa9b518a7c | |
| parent | 91b89a634487d5614e51ee773a889ed57f5551ca (diff) | |
arm64: stacktrace: Check kretprobe_find_ret_addr() return value
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>
| -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 1d9d51d7627fd..f6494c0942144 100644 --- a/arch/arm64/kernel/stacktrace.c +++ b/arch/arm64/kernel/stacktrace.c @@ -152,6 +152,8 @@ 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; state->flags.kretprobe = 1; } |