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| author |   Dan Carpenter <dan.carpenter@oracle.com> | 2019-09-03 21:25:44 +0800 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2019-09-03 08:08:29 -0600 |
| commit | d66c9920c0cf984cf99cab5036fd5f3a1b7fba46 (patch) | |
| tree | 4b94f032bb44096974c8a34a81d65be8af94e0b4 | |
| parent | bcache: add cond_resched() in __bch_cache_cmp() (diff) | |
| download | linux-dev-d66c9920c0cf984cf99cab5036fd5f3a1b7fba46.tar.xz linux-dev-d66c9920c0cf984cf99cab5036fd5f3a1b7fba46.zip | |
bcache: Fix an error code in bch_dump_read()
The copy_to_user() function returns the number of bytes remaining to be
copied, but the intention here was to return -EFAULT if the copy fails.
Fixes: cafe56359144 ("bcache: A block layer cache")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | drivers/md/bcache/debug.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c index 8b123be05254..336f43910383 100644 --- a/drivers/md/bcache/debug.c +++ b/drivers/md/bcache/debug.c @@ -178,10 +178,9 @@ static ssize_t bch_dump_read(struct file *file, char __user *buf, while (size) { struct keybuf_key *w; unsigned int bytes = min(i->bytes, size); - int err = copy_to_user(buf, i->buf, bytes); - if (err) - return err; + if (copy_to_user(buf, i->buf, bytes)) + return -EFAULT; ret += bytes; buf += bytes; |