linux

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Johan Hovold 55f261b73a ALSA: ua101: fix division by zero at probe Add the missing endpoint max-packet sanity check to probe() to avoid division by zero in alloc_stream_buffers() in case a malicious device has broken descriptors (or when doing descriptor fuzz testing). Note that USB core will reject URBs submitted for endpoints with zero wMaxPacketSize but that drivers doing packet-size calculations still need to handle this (cf. commit `2548288b4f` ("USB: Fix: Don't skip endpoint descriptors with maxpacket=0")). Fixes: `63978ab3e3` ("sound: add Edirol UA-101 support") Cc: stable@vger.kernel.org # 2.6.34 Signed-off-by: Johan Hovold <johan@kernel.org> Link: https://lore.kernel.org/r/20211026095401.26522-1-johan@kernel.org Signed-off-by: Takashi Iwai <tiwai@suse.de>	History 2021-10-27 08:23:30 +02:00
..
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
ua101.c	ALSA: ua101: fix division by zero at probe	2021-10-27 08:23:30 +02:00

Johan Hovold 55f261b73a ALSA: ua101: fix division by zero at probe

Add the missing endpoint max-packet sanity check to probe() to avoid
division by zero in alloc_stream_buffers() in case a malicious device
has broken descriptors (or when doing descriptor fuzz testing).

Note that USB core will reject URBs submitted for endpoints with zero
wMaxPacketSize but that drivers doing packet-size calculations still
need to handle this (cf. commit 2548288b4f ("USB: Fix: Don't skip
endpoint descriptors with maxpacket=0")).

Fixes: 63978ab3e3 ("sound: add Edirol UA-101 support")
Cc: stable@vger.kernel.org      # 2.6.34
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20211026095401.26522-1-johan@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>

History

2021-10-27 08:23:30 +02:00

Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00

ua101.c ALSA: ua101: fix division by zero at probe 2021-10-27 08:23:30 +02:00