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Imre Deak 002668bfd4 drm/dp_mst: Verify request type in the corresponding down message reply 
[ Upstream commit 4d49e77a97 ]

After receiving the response for an MST down request message, the
response should be accepted/parsed only if the response type matches
that of the request. Ensure this by checking if the request type code
stored both in the request and the reply match, dropping the reply in
case of a mismatch.

This fixes the topology detection for an MST hub, as described in the
Closes link below, where the hub sends an incorrect reply message after
a CLEAR_PAYLOAD_TABLE -> LINK_ADDRESS down request message sequence.

Cc: Lyude Paul <lyude@redhat.com>
Cc: <stable@vger.kernel.org>
Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/12804
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241203160223.2926014-3-imre.deak@intel.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-01-09 13:28:41 +01:00
arch arm64: Ensure bits ASID[15:8] are masked out when the kernel uses 8-bit ASIDs 2025-01-09 13:28:41 +01:00
block blk-iocost: Avoid using clamp() on inuse in __propagate_weights() 2024-12-19 18:07:21 +01:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:22:01 +02:00
crypto crypto: pcrypt - Call crypto layer directly when padata_do_parallel() return -EBUSY 2024-12-14 19:50:44 +01:00
Documentation Documentation: PM: Clarify pm_runtime_resume_and_get() return value 2024-12-19 18:07:21 +01:00
drivers drm/dp_mst: Verify request type in the corresponding down message reply 2025-01-09 13:28:41 +01:00
fs ksmbd: fix Out-of-Bounds Write in ksmbd_vfs_stream_write 2025-01-09 13:28:41 +01:00
include tcp_bpf: Add sk_rmem_alloc related logic for tcp_bpf ingress redirection 2025-01-09 13:28:37 +01:00
init initramfs: avoid filename buffer overrun 2024-12-14 19:50:42 +01:00
io_uring io_uring: fix possible deadlock in io_register_iowq_max_workers() 2024-11-17 15:06:25 +01:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2022-12-08 11:28:45 +01:00
kernel bpf: Check validity of link->type in bpf_link_show_fdinfo() 2025-01-09 13:28:40 +01:00
lib lib: string_helpers: silence snprintf() output truncation warning 2024-12-14 19:51:18 +01:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm vmalloc: fix accounting with i915 2025-01-09 13:28:40 +01:00
net bpf: Check negative offsets in __bpf_skb_min_len() 2025-01-09 13:28:37 +01:00
samples samples/bpf: Fix a resource leak 2024-12-14 19:51:36 +01:00
scripts modpost: Add .irqentry.text to OTHER_SECTIONS 2024-12-14 19:51:43 +01:00
security ima: Fix use-after-free on a dentry's dname.name 2024-12-14 19:51:45 +01:00
sound ALSA: hda/conexant: fix Z60MR100 startup pop issue 2025-01-09 13:28:39 +01:00
tools objtool/x86: allow syscall instruction 2024-12-19 18:07:22 +01:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:27:15 +01:00
virt KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin() 2024-10-22 15:40:41 +02:00
.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 trace: Relocate event helper files 2024-04-10 16:19:24 +02:00
Makefile Linux 5.15.175 2024-12-19 18:07:23 +01:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

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.