Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: md: wait for behind writes before destroying bitmap __md_stop() destroyed the bitmap before calling mddev_detach(). That made mddev_detach() skip bitmap_ops->wait_behind_writes(), because the bitmap was already disconnected from mddev. This was still safe for the legacy bitmap because bitmap_destroy() waits for behind writes itself. llbitmap keeps that wait in its ->wait_behind_writes() operation instead, while ->destroy() tears down the llbitmap storage. With the old ordering, RAID1 behind-write completions could still run after llbitmap storage had been freed. Call mddev_detach() before md_bitmap_destroy() so the common detach path can wait for behind writes while the bitmap is still alive. Only destroy the bitmap after those users are gone.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 5ab829f1971dc99f2aac10846c378e67fc875abc before 73881ff7a75913f919a1ce9d9571bfaab8e8588d; affected 5ab829f1971dc99f2aac10846c378e67fc875abc before 4224dccd325a9380e8edfb66aad8bb5771c94222; affected 5ab829f1971dc99f2aac10846c378e67fc875abc before 2a79365b2278f16e163e4024086105693b421601 |
| Linux / Linux | affected 6.18; unaffected 0 before 6.18; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.