CVE-2023-52437

Published: February 22, 2024Last modified: June 17, 2025

Description

In the Linux kernel, the following vulnerability has been resolved: Revert "md/raid5: Wait for MD_SB_CHANGE_PENDING in raid5d" This reverts commit 5e2cf333b7bd5d3e62595a44d598a254c697cd74. That commit introduced the following race and can cause system hung. md_write_start: raid5d: // mddev->in_sync == 1 set "MD_SB_CHANGE_PENDING" // running before md_write_start wakeup it waiting "MD_SB_CHANGE_PENDING" cleared >>>>>>>>> hung wakeup mddev->thread ... waiting "MD_SB_CHANGE_PENDING" cleared >>>> hung, raid5d should clear this flag but get hung by same flag. The issue reverted commit fixing is fixed by last patch in a new way.

Status

References

• https://git.kernel.org/stable/c/0de40f76d567133b871cd6ad46bb87afbce46983
• https://git.kernel.org/stable/c/84c39986fe6dd77aa15f08712339f5d4eb7dbe27
• https://git.kernel.org/stable/c/87165c64fe1a98bbab7280c58df3c83be2c98478
• https://git.kernel.org/stable/c/aab69ef769707ad987ff905d79e0bd6591812580
• https://git.kernel.org/stable/c/bed0acf330b2c50c688f6d9cfbcac2aa57a8e613
• https://git.kernel.org/stable/c/bed9e27baf52a09b7ba2a3714f1e24e17ced386d
• https://git.kernel.org/stable/c/cfa46838285814c3a27faacf7357f0a65bb5d152
• https://git.kernel.org/stable/c/e16a0bbdb7e590a6607b0d82915add738c03c069