| Assigner | Linux |
| Reserved | 2024-02-19 |
| Published | 2024-02-24 |
| Updated | 2024-06-04 |
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: regenerate buddy after block freeing failed if under fc replay This mostly reverts commit 6bd97bf273bd ("ext4: remove redundant mb_regenerate_buddy()") and reintroduces mb_regenerate_buddy(). Based on code in mb_free_blocks(), fast commit replay can end up marking as free blocks that are already marked as such. This causes corruption of the buddy bitmap so we need to regenerate it in that case.
Product status
0983142c5f17 before 94ebf71bddbc
6bd97bf273bd before c1317822e2de
6bd97bf273bd before 78327acd4cdc
6bd97bf273bd before ea42d6cffb0d
6bd97bf273bd before 6b0d48647935
6bd97bf273bd before c9b528c35795
5.11
Any version before 5.11
5.10.211
5.15.150
6.1.78
6.6.17
6.7.5
6.8
References
https://git.kernel.org/stable/c/94ebf71bddbcd4ab1ce43ae32c6cb66396d2d51a
https://git.kernel.org/stable/c/c1317822e2de80e78f137d3a2d99febab1b80326
https://git.kernel.org/stable/c/78327acd4cdc4a1601af718b781eece577b6b7d4
https://git.kernel.org/stable/c/ea42d6cffb0dd27a417f410b9d0011e9859328cb
https://git.kernel.org/stable/c/6b0d48647935e4b8c7b75d1eccb9043fcd4ee581
https://git.kernel.org/stable/c/c9b528c35795b711331ed36dc3dbee90d5812d4e
