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| author | Takashi Iwai <tiwai@suse.de> | 2020-04-20 10:55:29 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-02 18:24:22 +0300 |
| commit | f025e57b4b50114e6041879e6626c0be3f11f60c (patch) | |
| tree | 166eba3a81ea9ba94a1c2e1cfb3de2cab2a52778 | |
| parent | e21c20cf8b532259511cbeaef0db2a690d91f92d (diff) | |
| download | linux-f025e57b4b50114e6041879e6626c0be3f11f60c.tar.xz | |
ALSA: usx2y: Fix potential NULL dereference
commit 7686e3485253635c529cdd5f416fc640abaf076f upstream.
The error handling code in usX2Y_rate_set() may hit a potential NULL
dereference when an error occurs before allocating all us->urb[].
Add a proper NULL check for fixing the corner case.
Reported-by: Lin Yi <teroincn@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200420075529.27203-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | sound/usb/usx2y/usbusx2yaudio.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sound/usb/usx2y/usbusx2yaudio.c b/sound/usb/usx2y/usbusx2yaudio.c index f93b355756e6..2dfc0abf2e37 100644 --- a/sound/usb/usx2y/usbusx2yaudio.c +++ b/sound/usb/usx2y/usbusx2yaudio.c @@ -689,6 +689,8 @@ static int usX2Y_rate_set(struct usX2Ydev *usX2Y, int rate) us->submitted = 2*NOOF_SETRATE_URBS; for (i = 0; i < NOOF_SETRATE_URBS; ++i) { struct urb *urb = us->urb[i]; + if (!urb) + continue; if (urb->status) { if (!err) err = -ENODEV; |