Commit-ID: 0eadcc7a7bc03e991d2da1cf88143fb7cc0342c1
Gitweb: https://git.kernel.org/tip/0eadcc7a7bc03e991d2da1cf88143fb7cc0342c1
Author: Song Liu <songliubraving@xxxxxx>
AuthorDate: Mon, 9 Apr 2018 18:31:30 +0000
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Tue, 10 Apr 2018 07:33:10 +0200
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@xxxxxxx>
Signed-off-by: Song Liu <songliubraving@xxxxxx>
Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Fixes: e12f03d7031a ("perf/core: Implement the 'perf_kprobe' PMU")
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/trace/trace_event_perf.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c
index 94600f1f7efa..c79193e598f5 100644
--- a/kernel/trace/trace_event_perf.c
+++ b/kernel/trace/trace_event_perf.c
@@ -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') {
--
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