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Takashi Iwai fa01973bb7 ALSA: usb-audio: Add sanity check for OOB writes at silencing
[ Upstream commit fba2105a15 ]

At silencing the playback URB packets in the implicit fb mode before
the actual playback, we blindly assume that the received packets fit
with the buffer size.  But when the setup in the capture stream
differs from the playback stream (e.g. due to the USB core limitation
of max packet size), such an inconsistency may lead to OOB writes to
the buffer, resulting in a crash.

For addressing it, add a sanity check of the transfer buffer size at
prepare_silent_urb(), and stop the data copy if the received data
overflows.  Also, report back the transfer error properly from there,
too.

Note that this doesn't fix the root cause of the playback error
itself, but this merely covers the kernel Oops.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=221076
Link: https://patch.msgid.link/20260216141209.1849200-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-03-04 07:20:20 -05:00
arch ARM: 9467/1: mm: Don't use %pK through printk 2026-03-04 07:20:19 -05:00
block blk-mq-debugfs: add missing debugfs_mutex in blk_mq_debugfs_register_hctxs() 2026-03-04 07:19:59 -05:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:22:01 +02:00
crypto crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec 2026-02-06 16:41:53 +01:00
Documentation PCI: endpoint: Automatically create a function specific attributes group 2026-02-19 16:21:46 +01:00
drivers drm/radeon: Add HAINAN clock adjustment 2026-03-04 07:20:20 -05:00
fs fs/ntfs3: avoid calling run_get_entry() when run == NULL in ntfs_read_run_nb_ra() 2026-03-04 07:20:18 -05:00
include include: uapi: netfilter_bridge.h: Cover for musl libc 2026-03-04 07:20:19 -05:00
init init: handle bootloader identifier in kernel parameters 2025-10-19 16:21:45 +02:00
io_uring io_uring: fix filename leak in __io_openat_prep() 2026-01-19 13:09:54 +01:00
ipc ipc: fix to protect IPCS lookups using RCU 2025-06-27 11:05:26 +01:00
kernel tracing: Fix false sharing in hwlat get_sample() 2026-03-04 07:20:14 -05:00
lib lib/crypto: aes: Fix missing MMU protection for AES S-box 2026-01-19 13:10:13 +01:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm/kfence: randomize the freelist on initialization 2026-02-11 13:35:27 +01:00
net libceph: define and enforce CEPH_MAX_KEY_LEN 2026-03-04 07:20:19 -05:00
samples samples: mei: Fix building on musl libc 2025-08-28 16:24:07 +02:00
scripts modpost: Amend ppc64 save/restfpr symnames for -Os build 2026-03-04 07:20:06 -05:00
security apparmor: fix invalid deref of rawdata when export_binary is unset 2026-03-04 07:19:53 -05:00
sound ALSA: usb-audio: Add sanity check for OOB writes at silencing 2026-03-04 07:20:20 -05:00
tools tools/power cpupower: Reset errno before strtoull() 2026-03-04 07:19:57 -05:00
usr kbuild: hdrcheck: fix cross build with clang 2025-06-27 11:05:22 +01:00
virt KVM: Don't clobber irqfd routing type when deassigning irqfd 2026-02-11 13:35:27 +01:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Remove *.orig pattern from .gitignore 2024-10-17 15:11:10 +02:00
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Move Daniel Drake to credits 2021-09-21 08:34:58 +03:00
Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS staging: rtl8712: Remove driver using deprecated API wext 2025-12-07 06:09:36 +09:00
Makefile Linux 5.15.201 2026-02-19 16:21:47 +01:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.