diff options
| author | Luo Meng <luomeng12@huawei.com> | 2020-11-18 22:49:31 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-24 13:27:23 +0100 |
| commit | 730b192ad262545a269483609f52d29bff503507 (patch) | |
| tree | f54dc5269bccfe2ad925c6a91184629db6b55250 /kernel | |
| parent | edca48315fc31107f541c10da796e591fc50765b (diff) | |
fail_function: Remove a redundant mutex unlock
[ Upstream commit 2801a5da5b25b7af9dd2addd19b2315c02d17b64 ]
Fix a mutex_unlock() issue where before copy_from_user() is
not called mutex_locked.
Fixes: 4b1a29a7f542 ("error-injection: Support fault injection framework")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Luo Meng <luomeng12@huawei.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Link: https://lore.kernel.org/bpf/160570737118.263807.8358435412898356284.stgit@devnote2
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/fail_function.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/fail_function.c b/kernel/fail_function.c index bc80a4e268c0..a52151a2291f 100644 --- a/kernel/fail_function.c +++ b/kernel/fail_function.c @@ -261,7 +261,7 @@ static ssize_t fei_write(struct file *file, const char __user *buffer, if (copy_from_user(buf, buffer, count)) { ret = -EFAULT; - goto out; + goto out_free; } buf[count] = '\0'; sym = strstrip(buf); @@ -315,8 +315,9 @@ static ssize_t fei_write(struct file *file, const char __user *buffer, ret = count; } out: - kfree(buf); mutex_unlock(&fei_lock); +out_free: + kfree(buf); return ret; } |