diff options
| author | Josh Poimboeuf <[email protected]> | 2016-08-24 11:50:14 -0500 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2016-09-08 08:58:40 +0200 |
| commit | 019e579d395733d14097c2d29c8c43226dad1617 (patch) | |
| tree | 9f8183696df0afc107577b49c9d52a9fb8fa2a08 | |
| parent | 1d723de7396c1c028a091a37b2211ff6892c7f52 (diff) | |
perf/x86: Check perf_callchain_store() error
Add a check to perf_callchain_kernel() so that it returns early if the
callchain entry array is already full.
Signed-off-by: Josh Poimboeuf <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Byungchul Park <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Nilay Vaish <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/dce6d60bab08be2600efd90021d9b85620646161.1472057064.git.jpoimboe@redhat.com
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | arch/x86/events/core.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index d0efb5cb1b00..c1319ac19ebb 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -2277,7 +2277,8 @@ perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *re return; } - perf_callchain_store(entry, regs->ip); + if (perf_callchain_store(entry, regs->ip)) + return; dump_trace(NULL, regs, NULL, 0, &backtrace_ops, entry); } |