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authorSong Liu <songliubraving@fb.com>2018-04-11 18:02:37 +0000
committerIngo Molnar <mingo@kernel.org>2018-04-12 09:55:50 +0200
commit32e6e967fb36bf77ed99221ae3ce1909f045d8f9 (patch)
treedc3142bceb925e06540b65bea06477e5219f9968 /kernel
parent50268a3d266ecfdd6c5873d62b2758d9732fc598 (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 <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: 33ea4b24277b ("perf/core: Implement the 'perf_uprobe' PMU") Fixes: e12f03d7031a ("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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/events/core.c8
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
*/