CVE

CVE-2024-27023

Date: (C)2024-06-19   (M)2024-06-20

In the Linux kernel, the following vulnerability has been resolved: md: Fix missing release of 'active_io' for flush submit_flushes atomic_set(&mddev->flush_pending, 1); rdev_for_each_rcu(rdev, mddev) atomic_inc(&mddev->flush_pending); bi->bi_end_io = md_end_flush submit_bio(bi); /* flush io is done first */ md_end_flush if (atomic_dec_and_test(&mddev->flush_pending)) percpu_ref_put(&mddev->active_io) -> active_io is not released if (atomic_dec_and_test(&mddev->flush_pending)) -> missing release of active_io For consequence, mddev_suspend() will wait for 'active_io' to be zero forever. Fix this problem by releasing 'active_io' in submit_flushes() if 'flush_pending' is decreased to zero.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:		CVSS V2 Severity:
CVSS Score : 5.5		CVSS Score :
Exploit Score:		Exploit Score:
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CVSS V3 Metrics:		CVSS V2 Metrics:
Attack Vector:		Access Vector:
Attack Complexity:		Access Complexity:
Privileges Required:		Authentication:
User Interaction:		Confidentiality:
Scope:		Integrity:
Confidentiality:		Availability:
Integrity:
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Reference:

https://git.kernel.org/stable/c/02dad157ba11064d073f5499dc33552b227d5d3a

https://git.kernel.org/stable/c/11f81438927f84edfaaeb5d5f10856c3a1c1fc82

https://git.kernel.org/stable/c/6b2ff10390b19a2364af622b6666b690443f9f3f

https://git.kernel.org/stable/c/855678ed8534518e2b428bcbcec695de9ba248e8