diff options
| author | Azeem Shaikh <azeemshaikh38@gmail.com> | 2023-05-30 15:56:08 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-06-01 09:13:31 -0600 |
| commit | 20d099756b98fa6b5b838448b1ffbce46f4f3283 (patch) | |
| tree | 7395fa0c837d62973e862518c40d326844533da6 /block/elevator.c | |
| parent | 5a0ac57c48aa9380126bd9bf3ec82140aab84548 (diff) | |
block: Replace all non-returning strlcpy with strscpy
strlcpy() reads the entire source buffer first.
This read may exceed the destination size limit.
This is both inefficient and can lead to linear read
overflows if a source string is not NUL-terminated [1].
In an effort to remove strlcpy() completely [2], replace
strlcpy() here with strscpy().
No return values were used, so direct replacement is safe.
[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89
Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230530155608.272266-1-azeemshaikh38@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/elevator.c')
| -rw-r--r-- | block/elevator.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/elevator.c b/block/elevator.c index 24909069f872..8400e303fbcb 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -751,7 +751,7 @@ ssize_t elv_iosched_store(struct request_queue *q, const char *buf, if (!elv_support_iosched(q)) return count; - strlcpy(elevator_name, buf, sizeof(elevator_name)); + strscpy(elevator_name, buf, sizeof(elevator_name)); ret = elevator_change(q, strstrip(elevator_name)); if (!ret) return count; |