linux-cve-announce - CVE-2022-50164: wifi: iwlwifi: mvm: fix double list_add at iwl_mvm_mac_wake_tx

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Message-ID: <2025061826-CVE-2022-50164-878e@gregkh>
Date: Wed, 18 Jun 2025 13:03:49 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2022-50164: wifi: iwlwifi: mvm: fix double list_add at iwl_mvm_mac_wake_tx_queue

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

wifi: iwlwifi: mvm: fix double list_add at iwl_mvm_mac_wake_tx_queue

After successfull station association, if station queues are disabled for
some reason, the related lists are not emptied. So if some new element is
added to the list in iwl_mvm_mac_wake_tx_queue, it can match with the old
one and produce a BUG like this:

[   46.535263] list_add corruption. prev->next should be next (ffff94c1c318a360), but was 0000000000000000. (prev=ffff94c1d02d3388).
[   46.535283] ------------[ cut here ]------------
[   46.535284] kernel BUG at lib/list_debug.c:26!
[   46.535290] invalid opcode: 0000 [#1] PREEMPT SMP PTI
[   46.585304] CPU: 0 PID: 623 Comm: wpa_supplicant Not tainted 5.19.0-rc3+ #1
[   46.592380] Hardware name: Dell Inc. Inspiron 660s/0478VN       , BIOS A07 08/24/2012
[   46.600336] RIP: 0010:__list_add_valid.cold+0x3d/0x3f
[   46.605475] Code: f2 4c 89 c1 48 89 fe 48 c7 c7 c8 40 67 93 e8 20 cc fd ff 0f 0b 48 89 d1 4c 89 c6 4c 89 ca 48 c7 c7 70 40 67 93 e8 09 cc fd ff <0f> 0b 48 89 fe 48 c7 c7 00 41 67 93 e8 f8 cb fd ff 0f 0b 48 89 d1
[   46.624469] RSP: 0018:ffffb20800ab76d8 EFLAGS: 00010286
[   46.629854] RAX: 0000000000000075 RBX: ffff94c1c318a0e0 RCX: 0000000000000000
[   46.637105] RDX: 0000000000000201 RSI: ffffffff9365e100 RDI: 00000000ffffffff
[   46.644356] RBP: ffff94c1c5f43370 R08: 0000000000000075 R09: 3064316334396666
[   46.651607] R10: 3364323064316334 R11: 39666666663d7665 R12: ffff94c1c5f43388
[   46.658857] R13: ffff94c1d02d3388 R14: ffff94c1c318a360 R15: ffff94c1cf2289c0
[   46.666108] FS:  00007f65634ff7c0(0000) GS:ffff94c1da200000(0000) knlGS:0000000000000000
[   46.674331] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   46.680170] CR2: 00007f7dfe984460 CR3: 000000010e894003 CR4: 00000000000606f0
[   46.687422] Call Trace:
[   46.689906]  <TASK>
[   46.691950]  iwl_mvm_mac_wake_tx_queue+0xec/0x15c [iwlmvm]
[   46.697601]  ieee80211_queue_skb+0x4b3/0x720 [mac80211]
[   46.702973]  ? sta_info_get+0x46/0x60 [mac80211]
[   46.707703]  ieee80211_tx+0xad/0x110 [mac80211]
[   46.712355]  __ieee80211_tx_skb_tid_band+0x71/0x90 [mac80211]
...

In order to avoid this problem, we must also remove the related lists when
station queues are disabled.

The Linux kernel CVE team has assigned CVE-2022-50164 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 5.1 with commit cfbc6c4c5b91c7725ef14465b98ac347d31f2334 and fixed in 5.4.211 with commit 5cca5f714fe6cedd2df9d8451ad8df21e6464f62
	Issue introduced in 5.1 with commit cfbc6c4c5b91c7725ef14465b98ac347d31f2334 and fixed in 5.10.137 with commit 38d71acc15a2e72806b516380af0adb3830d4639
	Issue introduced in 5.1 with commit cfbc6c4c5b91c7725ef14465b98ac347d31f2334 and fixed in 5.15.61 with commit 4a40af2b0b9517fca7ae2a030c9c0a16836303c0
	Issue introduced in 5.1 with commit cfbc6c4c5b91c7725ef14465b98ac347d31f2334 and fixed in 5.18.18 with commit ff068c25bf90d26f0aee1751553f18076b797e8d
	Issue introduced in 5.1 with commit cfbc6c4c5b91c7725ef14465b98ac347d31f2334 and fixed in 5.19.2 with commit 182d3c1385f44ba7c508bf5b1292a7fe96ad4e9e
	Issue introduced in 5.1 with commit cfbc6c4c5b91c7725ef14465b98ac347d31f2334 and fixed in 6.0 with commit 14a3aacf517a9de725dd3219dbbcf741e31763c4

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2022-50164
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/net/wireless/intel/iwlwifi/mvm/sta.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/5cca5f714fe6cedd2df9d8451ad8df21e6464f62
	https://git.kernel.org/stable/c/38d71acc15a2e72806b516380af0adb3830d4639
	https://git.kernel.org/stable/c/4a40af2b0b9517fca7ae2a030c9c0a16836303c0
	https://git.kernel.org/stable/c/ff068c25bf90d26f0aee1751553f18076b797e8d
	https://git.kernel.org/stable/c/182d3c1385f44ba7c508bf5b1292a7fe96ad4e9e
	https://git.kernel.org/stable/c/14a3aacf517a9de725dd3219dbbcf741e31763c4