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THREATINT
PUBLISHED

CVE-2024-26775

aoe: avoid potential deadlock at set_capacity



Description

In the Linux kernel, the following vulnerability has been resolved: aoe: avoid potential deadlock at set_capacity Move set_capacity() outside of the section procected by (&d->lock). To avoid possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- [1] lock(&bdev->bd_size_lock); local_irq_disable(); [2] lock(&d->lock); [3] lock(&bdev->bd_size_lock); <Interrupt> [4] lock(&d->lock); *** DEADLOCK *** Where [1](&bdev->bd_size_lock) hold by zram_add()->set_capacity(). [2]lock(&d->lock) hold by aoeblk_gdalloc(). And aoeblk_gdalloc() is trying to acquire [3](&bdev->bd_size_lock) at set_capacity() call. In this situation an attempt to acquire [4]lock(&d->lock) from aoecmd_cfg_rsp() will lead to deadlock. So the simplest solution is breaking lock dependency [2](&d->lock) -> [3](&bdev->bd_size_lock) by moving set_capacity() outside.

Reserved 2024-02-19 | Published 2024-04-03 | Updated 2024-12-19 | Assigner Linux

Product status

Default status
unaffected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2d623c94fbba3554f4446ba6f3c764994e8b0d26
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 673629018ba04906899dcb631beec34d871f709c
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 19a77b27163820f793b4d022979ffdca8f659b77
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e169bd4fb2b36c4b2bee63c35c740c85daeb2e86
affected

Default status
affected

6.1.80
unaffected

6.6.19
unaffected

6.7.7
unaffected

6.8
unaffected

References

git.kernel.org/...c/2d623c94fbba3554f4446ba6f3c764994e8b0d26

git.kernel.org/...c/673629018ba04906899dcb631beec34d871f709c

git.kernel.org/...c/19a77b27163820f793b4d022979ffdca8f659b77

git.kernel.org/...c/e169bd4fb2b36c4b2bee63c35c740c85daeb2e86

cve.org (CVE-2024-26775)

nvd.nist.gov (CVE-2024-26775)

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