diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2019-03-08 01:29:33 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-08 03:32:01 +0100 |
| commit | 5ac188b12e7cbdd92dee60877d1fac913fc1d074 (patch) | |
| tree | bd26bfcf5ba2bd02901fe83fd49d027330937ddb /drivers/rapidio | |
| parent | kernel: workqueue: clarify wq_worker_last_func() caller requirements (diff) | |
| download | linux-5ac188b12e7cbdd92dee60877d1fac913fc1d074.tar.xz linux-5ac188b12e7cbdd92dee60877d1fac913fc1d074.zip | |
drivers/rapidio/rio_cm.c: fix potential oops in riocm_ch_listen()
If riocm_get_channel() fails, then we should just return -EINVAL.
Calling riocm_put_channel() will trigger a NULL dereference and
generally we should call put() if the get() didn't succeed.
Link: http://lkml.kernel.org/r/20190110130230.GB27017@kadam
Fixes: b6e8d4aa1110 ("rapidio: add RapidIO channelized messaging driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Alexandre Bounine <alexandre.bounine@idt.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rapidio')
| -rw-r--r-- | drivers/rapidio/rio_cm.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/rapidio/rio_cm.c b/drivers/rapidio/rio_cm.c index bad0e0ea4f30..cf45829585cb 100644 --- a/drivers/rapidio/rio_cm.c +++ b/drivers/rapidio/rio_cm.c @@ -1215,7 +1215,9 @@ static int riocm_ch_listen(u16 ch_id) riocm_debug(CHOP, "(ch_%d)", ch_id); ch = riocm_get_channel(ch_id); - if (!ch || !riocm_cmp_exch(ch, RIO_CM_CHAN_BOUND, RIO_CM_LISTEN)) + if (!ch) + return -EINVAL; + if (!riocm_cmp_exch(ch, RIO_CM_CHAN_BOUND, RIO_CM_LISTEN)) ret = -EINVAL; riocm_put_channel(ch); return ret; |