diff options
| author | Mark Brown <broonie@kernel.org> | 2018-06-01 11:40:19 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-06-01 11:40:19 +0100 |
| commit | 91983dd5325297de4a2b6e1e3f22497604b6c687 (patch) | |
| tree | 82a440219533c59dde336b383f89bcfe43da3aa5 /arch/arm64/kernel/stacktrace.c | |
| parent | c36e3982af7020ff66886b6a7d673a8a471c4eac (diff) | |
| parent | 9c465aceb29ae6033c9021cc38a7dd219d9edb43 (diff) | |
Merge branch 'linux-linaro-lsk-v4.14' into linux-linaro-lsk-v4.14-rtlsk-v4.14-18.05-rt
Diffstat (limited to 'arch/arm64/kernel/stacktrace.c')
| -rw-r--r-- | arch/arm64/kernel/stacktrace.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c index 76809ccd309c..d5718a060672 100644 --- a/arch/arm64/kernel/stacktrace.c +++ b/arch/arm64/kernel/stacktrace.c @@ -59,6 +59,11 @@ int notrace unwind_frame(struct task_struct *tsk, struct stackframe *frame) #ifdef CONFIG_FUNCTION_GRAPH_TRACER if (tsk->ret_stack && (frame->pc == (unsigned long)return_to_handler)) { + if (WARN_ON_ONCE(frame->graph == -1)) + return -EINVAL; + if (frame->graph < -1) + frame->graph += FTRACE_NOTRACE_DEPTH; + /* * This is a case where function graph tracer has * modified a return address (LR) in a stack frame |