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perf/core: Fix perf_uprobe_init() 

Similarly to the uprobe PMU fix in perf_kprobe_init(), fix error
handling in perf_uprobe_init() as well.

Reported-by: 范龙飞 <long7573@126.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: e12f03d703 ("perf/core: Implement the 'perf_kprobe' PMU")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
hifive-unleashed-5.1
Song Liu 2018-04-09 18:31:30 +00:00 committed by Ingo Molnar
parent 5da13ab8b0
commit 0eadcc7a7b
1 changed files with 2 additions and 0 deletions
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2
kernel/trace/trace_event_perf.c
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@ -302,6 +302,8 @@ int perf_uprobe_init(struct perf_event *p_event, bool is_retprobe)
return -ENOMEM;
ret = strncpy_from_user(
path, u64_to_user_ptr(p_event->attr.uprobe_path), PATH_MAX);
if (ret == PATH_MAX)
return -E2BIG;
if (ret < 0)
goto out;
if (path[0] == '\0') {