diff options
| author | Anton Blanchard <anton@samba.org> | 2015-04-14 07:51:03 +1000 |
|---|---|---|
| committer | Zefan Li <lizefan@huawei.com> | 2015-09-18 09:20:30 +0800 |
| commit | 3e6102f91bb7073fb07aaf11068595d1a284c7a8 (patch) | |
| tree | 111119b3b05e1620330422669bf1b7d374a5143a /arch | |
| parent | c9ff0e39da0903f48ef93983f84338674192936b (diff) | |
powerpc/perf: Cap 64bit userspace backtraces to PERF_MAX_STACK_DEPTH
commit 9a5cbce421a283e6aea3c4007f141735bf9da8c3 upstream.
We cap 32bit userspace backtraces to PERF_MAX_STACK_DEPTH
(currently 127), but we forgot to do the same for 64bit backtraces.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Zefan Li <lizefan@huawei.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/perf/callchain.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/perf/callchain.c b/arch/powerpc/perf/callchain.c index e8a18d1cc7c9..a9bd794652c9 100644 --- a/arch/powerpc/perf/callchain.c +++ b/arch/powerpc/perf/callchain.c @@ -243,7 +243,7 @@ static void perf_callchain_user_64(struct perf_callchain_entry *entry, sp = regs->gpr[1]; perf_callchain_store(entry, next_ip); - for (;;) { + while (entry->nr < PERF_MAX_STACK_DEPTH) { fp = (unsigned long __user *) sp; if (!valid_user_sp(sp, 1) || read_user_stack_64(fp, &next_sp)) return; |