diff options
| author | Song Liu <[email protected]> | 2018-04-11 18:02:37 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2018-04-12 09:55:50 +0200 |
| commit | 32e6e967fb36bf77ed99221ae3ce1909f045d8f9 (patch) | |
| tree | dc3142bceb925e06540b65bea06477e5219f9968 | |
| parent | 50268a3d266ecfdd6c5873d62b2758d9732fc598 (diff) | |
perf/core: Need CAP_SYS_ADMIN to create k/uprobe with perf_event_open()
Non-root user cannot create kprobe or uprobe through the text-based
interface (kprobe_events, uprobe_events),so they should not be able
to create probes via perf_event_open() either.
Reported-by: Vince Weaver <[email protected]>
Signed-off-by: Song Liu <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Fixes: 33ea4b24277b ("perf/core: Implement the 'perf_uprobe' PMU")
Fixes: e12f03d7031a ("perf/core: Implement the 'perf_kprobe' PMU")
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
| -rw-r--r-- | kernel/events/core.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index d7af82827373..2d5fe26551f8 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -8400,6 +8400,10 @@ static int perf_kprobe_event_init(struct perf_event *event) if (event->attr.type != perf_kprobe.type) return -ENOENT; + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + /* * no branch sampling for probe events */ @@ -8437,6 +8441,10 @@ static int perf_uprobe_event_init(struct perf_event *event) if (event->attr.type != perf_uprobe.type) return -ENOENT; + + if (!capable(CAP_SYS_ADMIN)) + return -EACCES; + /* * no branch sampling for probe events */ |