diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2019-09-03 16:25:44 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-27 16:51:09 +0300 |
| commit | e7728e18a728bcbd072bca82650b10e0ba55a238 (patch) | |
| tree | b4c3515708f3bedd49cbde8ba3d16ac9fe120e5e /drivers/md | |
| parent | 2404a2e35aaf74add564abfdb09273bbffae8ace (diff) | |
| download | linux-e7728e18a728bcbd072bca82650b10e0ba55a238.tar.xz | |
bcache: Fix an error code in bch_dump_read()
[ Upstream commit d66c9920c0cf984cf99cab5036fd5f3a1b7fba46 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/md')
| -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 8c53d874ada4..f6b60d5908f7 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; |