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| author | Takashi Iwai <tiwai@suse.de> | 2019-10-22 17:45:14 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-11-12 19:27:29 +0100 |
| commit | d2f49f58b40e1680650bc36f9b5d3de626f57b09 (patch) | |
| tree | 9969d00572795612419fff2129d3d37762e050fa /sound | |
| parent | aa07532bc86bd94b7cdafd3042d3e268a34f4cbe (diff) | |
| download | linux-stable-d2f49f58b40e1680650bc36f9b5d3de626f57b09.tar.gz linux-stable-d2f49f58b40e1680650bc36f9b5d3de626f57b09.tar.bz2 linux-stable-d2f49f58b40e1680650bc36f9b5d3de626f57b09.zip | |
ALSA: usb-audio: Fix copy&paste error in the validator
commit ba8bf0967a154796be15c4983603aad0b05c3138 upstream.
The recently introduced USB-audio descriptor validator had a stupid
copy&paste error that may lead to an unexpected overlook of too short
descriptors for processing and extension units. It's likely the cause
of the report triggered by syzkaller fuzzer. Let's fix it.
Fixes: 57f8770620e9 ("ALSA: usb-audio: More validations of descriptor units")
Reported-by: syzbot+0620f79a1978b1133fd7@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/s5hsgnkdbsl.wl-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/usb/validate.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/usb/validate.c b/sound/usb/validate.c index 3c8f73a0eb12..a5e584b60dcd 100644 --- a/sound/usb/validate.c +++ b/sound/usb/validate.c @@ -75,7 +75,7 @@ static bool validate_processing_unit(const void *p, if (d->bLength < sizeof(*d)) return false; - len = d->bLength < sizeof(*d) + d->bNrInPins; + len = sizeof(*d) + d->bNrInPins; if (d->bLength < len) return false; switch (v->protocol) { |