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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-09-07 09:48:59 +1000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-09-07 09:48:59 +1000 |
| commit | fff34b3412b9401a76ba9d021db1bd91cb0e02b6 (patch) | |
| tree | 870ed2d1555004e7939d15b5099017aae61c97b8 /kernel/events/callchain.c | |
| parent | 28e1e58fb668e262648fb8ee8a24154633f40507 (diff) | |
| parent | 636802ef96eebe279b22ad9f9dacfe29291e45c7 (diff) | |
Merge branch 'merge' into next
Brings in various bug fixes from 3.6-rcX
Diffstat (limited to 'kernel/events/callchain.c')
| -rw-r--r-- | kernel/events/callchain.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/kernel/events/callchain.c b/kernel/events/callchain.c index 6581a040f399..98d4597f43d6 100644 --- a/kernel/events/callchain.c +++ b/kernel/events/callchain.c @@ -153,7 +153,8 @@ put_callchain_entry(int rctx) put_recursion_context(__get_cpu_var(callchain_recursion), rctx); } -struct perf_callchain_entry *perf_callchain(struct pt_regs *regs) +struct perf_callchain_entry * +perf_callchain(struct perf_event *event, struct pt_regs *regs) { int rctx; struct perf_callchain_entry *entry; @@ -178,6 +179,12 @@ struct perf_callchain_entry *perf_callchain(struct pt_regs *regs) } if (regs) { + /* + * Disallow cross-task user callchains. + */ + if (event->ctx->task && event->ctx->task != current) + goto exit_put; + perf_callchain_store(entry, PERF_CONTEXT_USER); perf_callchain_user(entry, regs); } |