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| author | Anton Blanchard | 2015-04-13 23:51:03 +0200 |
|---|---|---|
| committer | Michael Ellerman | 2015-04-14 08:21:16 +0200 |
| commit | 9a5cbce421a283e6aea3c4007f141735bf9da8c3 (patch) | |
| tree | 90dffd2ba5a0ca50e266d41100c8909cc70aebe0 | |
| parent | powerpc/perf/hv-24x7: Fail 24x7 initcall if create_events_from_catalog() fails (diff) | |
| download | kernel-qcow2-linux-9a5cbce421a283e6aea3c4007f141735bf9da8c3.tar.gz kernel-qcow2-linux-9a5cbce421a283e6aea3c4007f141735bf9da8c3.tar.xz kernel-qcow2-linux-9a5cbce421a283e6aea3c4007f141735bf9da8c3.zip | |
powerpc/perf: Cap 64bit userspace backtraces to PERF_MAX_STACK_DEPTH
We cap 32bit userspace backtraces to PERF_MAX_STACK_DEPTH
(currently 127), but we forgot to do the same for 64bit backtraces.
Cc: stable@vger.kernel.org
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -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 2396dda282cd..ead55351b254 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; |