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ALSA: usb-audio: Fix NULL dereference in create_fixed_stream_quirk()
authorTakashi Iwai <tiwai@suse.de>
Tue, 15 Mar 2016 11:09:10 +0000 (12:09 +0100)
committerTakashi Iwai <tiwai@suse.de>
Wed, 16 Mar 2016 11:42:16 +0000 (12:42 +0100)
commit0f886ca12765d20124bd06291c82951fd49a33be
tree77a2f29035f4d41e9cd614645baf1534c291cac0tree | snapshot
parentb62232d429fa8b1dcf5d8503aa5a5397a03e646acommit | diff
ALSA: usb-audio: Fix NULL dereference in create_fixed_stream_quirk()

create_fixed_stream_quirk() may cause a NULL-pointer dereference by
accessing the non-existing endpoint when a USB device with a malformed
USB descriptor is used.

This patch avoids it simply by adding a sanity check of bNumEndpoints
before the accesses.

Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=971125
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
sound/usb/quirks.c diff | blob | history
Domain: System / Kernel;