CVSS 5.5 · Medium EPSS 0,21%
Kerentanan pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: quota: flush quota_release_work upon quota writeback One of the paths quota writeback is called from is: freeze_super() sync_filesystem() ext4_sync_fs() dquot_writeback_dquots() Since we currently don't always flush the quota_release_work queue in this path, we can end up with the following race: 1. dquot are added to releasing_dquots list during regular operations. 2. FS Freeze starts, however, this does not flush the quota_release_work queue. 3. Freeze completes. 4. Kernel eventually tries to flush the workqueue while FS is frozen which hits a WARN_ON since transaction gets started during frozen state: ext4_journal_check_start+0x28/0x110 [ext4] (unreliable) __ext4_journal_start_sb+0x64/0x1c0 [ext4] ext4_release_dquot+0x90/0x1d0 [ext4] quota_release_workfn+0x43c/0x4d0 Which is the following line: WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE); Which ultimately results in generic/390 failing due to dmesg noise. This was detected on powerpc machine 15 cores. To avoid this, make sure to flush the workqueue during dquot_writeback_dquots() so we dont have any pending workitems after freeze.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 4.19.295 hingga sebelum 4.20 |
| linux | linux kernel | Versi 5.4.257 hingga sebelum 5.4.287 |
| linux | linux kernel | Versi 5.10.195 hingga sebelum 5.10.231 |
| linux | linux kernel | Versi 5.15.132 hingga sebelum 5.15.174 |
| linux | linux kernel | Versi 6.1.53 hingga sebelum 6.1.120 |
| linux | linux kernel | Versi 6.4.16 hingga sebelum 6.5 |
| linux | linux kernel | Versi 6.5.3 hingga sebelum 6.6.64 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.12.4 |
| linux | linux kernel | Versi 6.13 rc1 |