Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d40c192e119892799dd4ddf94f5cea6fa93775ef before a5abba5e0e586e258ded3e798fe5f69c66fec198; affected 86d89987f0998c98f57d641e308b40452a994045 before 6f3821acd7c3143145999248087de5fb4b48cf26; affected 89602de9a2d7080b7a4029d5c1bf8f78d295ff5f before ab6cfcf8ed2c7496f55d020b65b1d8cd55d9a2cb; affected 3027e200dd58d5b437f16634dbbd355b29ffe0a6 before 3e6ff207cd5bd924ad94cd1a7c633bcdac0ba1cb; affected dabc8b20756601b9e1cc85a81d47d3f98ed4d13a before bcacb52a985f1b6d280f698a470b873dfe52728a; affected dabc8b20756601b9e1cc85a81d47d3f98ed4d13a before 8ea87e34792258825d290f4dc5216276e91cb224; affected dabc8b20756601b9e1cc85a81d47d3f98ed4d13a before ac6f420291b3fee1113f21d612fa88b628afab5b; affected f3e9a2bbdeb8987508dd6bb2b701dea911d4daec; affected 903fc5d8cb48b0d2de7095ef40e39fd32bb27bd0; affected 31bed65eecbc5ce57592cfe31947eaa64e3d678e; affected 5.4.257 before 5.4.287; affected 5.10.195 before 5.10.231; affected 5.15.132 before 5.15.174; affected 6.1.53 before 6.1.120; affected 4.19.295 before 4.20; affected 6.4.16 before 6.5; affected 6.5.3 before 6.6 |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 5.4.287 through 5.4.*; unaffected 5.10.231 through 5.10.*; unaffected 5.15.174 through 5.15.*; unaffected 6.1.120 through 6.1.*; unaffected 6.6.64 through 6.6.*; unaffected 6.12.4 through 6.12.*; unaffected 6.13 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a5abba5e0e586e258ded3e798fe5f69c66fec198
- https://git.kernel.org/stable/c/6f3821acd7c3143145999248087de5fb4b48cf26
- https://git.kernel.org/stable/c/ab6cfcf8ed2c7496f55d020b65b1d8cd55d9a2cb
- https://git.kernel.org/stable/c/3e6ff207cd5bd924ad94cd1a7c633bcdac0ba1cb
- https://git.kernel.org/stable/c/bcacb52a985f1b6d280f698a470b873dfe52728a
- https://git.kernel.org/stable/c/8ea87e34792258825d290f4dc5216276e91cb224
- https://git.kernel.org/stable/c/ac6f420291b3fee1113f21d612fa88b628afab5b
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
No English description supplied.