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| author | David S. Miller <davem@davemloft.net> | 2018-02-24 00:04:20 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-02-24 00:04:20 -0500 |
| commit | f74290fdb363665538743d14c4f00aeacdb68d87 (patch) | |
| tree | a5c8f6332f06550e935d1e557ac927302f7f63c4 /arch/arm64/kernel/stacktrace.c | |
| parent | 1b71af6053af1bd2f849e9fda4f71c1e3f145dcf (diff) | |
| parent | 9cb9c07d6b0c5fd97d83b8ab14d7e308ba4b612f (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
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 |