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perf/core: Need CAP_SYS_ADMIN to create k/uprobe with perf_event_open()

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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 <vincent.weaver@maine.edu>
Signed-off-by: Song Liu <songliubraving@fb.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 33ea4b2427 ("perf/core: Implement the 'perf_uprobe' PMU")
Fixes: e12f03d703 ("perf/core: Implement the 'perf_kprobe' PMU")
Link: http://lkml.kernel.org/r/C0B2EFB5-C403-4BDB-9046-C14B3EE66999@fb.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Song Liu 2018-04-11 18:02:37 +00:00 committed by Ingo Molnar
parent 50268a3d26
commit 32e6e967fb
1 changed files with 8 additions and 0 deletions
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8
kernel/events/core.c
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@ -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
*/