Commit-ID: 019e579d395733d14097c2d29c8c43226dad1617 Gitweb: http://git.kernel.org/tip/019e579d395733d14097c2d29c8c43226dad1617 Author: Josh Poimboeuf <jpoim...@redhat.com> AuthorDate: Wed, 24 Aug 2016 11:50:14 -0500 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Thu, 8 Sep 2016 08:58:40 +0200
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 <jpoim...@redhat.com> Cc: Andy Lutomirski <l...@amacapital.net> Cc: Brian Gerst <brge...@gmail.com> Cc: Byungchul Park <byungchul.p...@lge.com> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Kees Cook <keesc...@chromium.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Nilay Vaish <nilayva...@gmail.com> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Steven Rostedt <rost...@goodmis.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/dce6d60bab08be2600efd90021d9b85620646161.1472057064.git.jpoim...@redhat.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/events/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index d0efb5c..c1319ac 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); }
