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| author | Luo Meng <luomeng12@huawei.com> | 2020-11-18 22:49:31 +0900 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-11-19 11:58:16 -0800 |
| commit | 2801a5da5b25b7af9dd2addd19b2315c02d17b64 (patch) | |
| tree | dbabe546198f7e2d4386a36345730541e747ab58 /kernel/fail_function.c | |
| parent | 14d6d86c210aea1a83c19a8f6391ecabcbefed94 (diff) | |
| download | linux-2801a5da5b25b7af9dd2addd19b2315c02d17b64.tar.gz linux-2801a5da5b25b7af9dd2addd19b2315c02d17b64.tar.bz2 linux-2801a5da5b25b7af9dd2addd19b2315c02d17b64.zip | |
fail_function: Remove a redundant mutex unlock
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
Diffstat (limited to 'kernel/fail_function.c')
| -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 63b349168da7..b0b1ad93fa95 100644 --- a/kernel/fail_function.c +++ b/kernel/fail_function.c @@ -253,7 +253,7 @@ 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); @@ -307,8 +307,9 @@ 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; } |