CVE-2024-57946

virtio-blk: don't keep queue frozen during system suspend

State: Published
Severity: 5.5 Medium
Published: Jan 21, 2025
Updated: May 23, 2026
Reserved: Jan 19, 2025

Description

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

virtio-blk: don't keep queue frozen during system suspend

Commit 4ce6e2db00de ("virtio-blk: Ensure no requests in virtqueues before deleting vqs.") replaces queue quiesce with queue freeze in virtio-blk's PM callbacks. And the motivation is to drain inflight IOs before suspending.

block layer's queue freeze looks very handy, but it is also easy to cause deadlock, such as, any attempt to call into bio_queue_enter() may run into deadlock if the queue is frozen in current context. There are all kinds of ->suspend() called in suspend context, so keeping queue frozen in the whole suspend context isn't one good idea. And Marek reported lockdep warning[1] caused by virtio-blk's freeze queue in virtblk_freeze().

[1] https://lore.kernel.org/linux-block/ca16370e-d646-4eee-b9cc-87277c89c43c@samsung.com/

Given the motivation is to drain in-flight IOs, it can be done by calling freeze & unfreeze, meantime restore to previous behavior by keeping queue quiesced during suspend.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-667 Improper Locking

Affected Products

Product	Versions
LinuxLinux	b7bfaea8f5ecd290864f5ae4c69859b89832b4dc to before d738f3215bb4f88911ff4579780a44960c8e0ca5Affected 5fe446b245ba61ddc924d7db280bcd987c39357a to before 9ca428c6397abaa8c38f5c69133a2299e1efbbf2Affected 2a52590ac52394540351d8289cc2af0b83cf7d31 to before 6dea8e3de59928974bf157dd0499d3958d744ae4Affected db48acce75d73dfe51c43d56893cce067b73cf08 to before 9e323f856cf4963120e0e3892a84ef8bd764a0e4Affected 8946924ff324853df6b7c525a7467d964dfd11c3 to before 12c0ddd6c551c1e438b087f874b4f1223a75f7eaAffected 4ce6e2db00de8103a0687fb0f65fd17124a51aaa to before 92d5139b91147ab372a17daf5dc27a5b9278e516Affected 4ce6e2db00de8103a0687fb0f65fd17124a51aaa to before 7678abee0867e6b7fb89aa40f6e9f575f755fb37Affected 2b5128c714d863cd8d259aa9d87bed2d6aa6a5a8Affected c67ed40b1b4a66e3a13b21bdfbd0151639da5240Affected 5.4.270 to before 5.4.289Affected 5.10.211 to before 5.10.233Affected 5.15.150 to before 5.15.176Affected 6.1.80 to before 6.1.123Affected 6.6.19 to before 6.6.69Affected 4.19.308 to before 4.20Affected 6.7.7 to before 6.8Affected
LinuxLinux	6.8Affected before 6.8Not affected 5.4.289 through 5.4.Not affected 5.10.233 through 5.10.Not affected 5.15.176 through 5.15.Not affected 6.1.123 through 6.1.Not affected 6.6.69 through 6.6.Not affected 6.12.8 through 6.12.Not affected 6.13 and laterNot affected

Product

Versions

LinuxLinux

b7bfaea8f5ecd290864f5ae4c69859b89832b4dc to before d738f3215bb4f88911ff4579780a44960c8e0ca5Affected
5fe446b245ba61ddc924d7db280bcd987c39357a to before 9ca428c6397abaa8c38f5c69133a2299e1efbbf2Affected
2a52590ac52394540351d8289cc2af0b83cf7d31 to before 6dea8e3de59928974bf157dd0499d3958d744ae4Affected
db48acce75d73dfe51c43d56893cce067b73cf08 to before 9e323f856cf4963120e0e3892a84ef8bd764a0e4Affected
8946924ff324853df6b7c525a7467d964dfd11c3 to before 12c0ddd6c551c1e438b087f874b4f1223a75f7eaAffected
4ce6e2db00de8103a0687fb0f65fd17124a51aaa to before 92d5139b91147ab372a17daf5dc27a5b9278e516Affected
4ce6e2db00de8103a0687fb0f65fd17124a51aaa to before 7678abee0867e6b7fb89aa40f6e9f575f755fb37Affected
2b5128c714d863cd8d259aa9d87bed2d6aa6a5a8Affected
c67ed40b1b4a66e3a13b21bdfbd0151639da5240Affected
5.4.270 to before 5.4.289Affected
5.10.211 to before 5.10.233Affected
5.15.150 to before 5.15.176Affected
6.1.80 to before 6.1.123Affected
6.6.19 to before 6.6.69Affected
4.19.308 to before 4.20Affected
6.7.7 to before 6.8Affected

LinuxLinux

6.8Affected
before 6.8Not affected
5.4.289 through 5.4.*Not affected
5.10.233 through 5.10.*Not affected
5.15.176 through 5.15.*Not affected
6.1.123 through 6.1.*Not affected
6.6.69 through 6.6.*Not affected
6.12.8 through 6.12.*Not affected
6.13 and laterNot affected

References

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