Tracker / CVE-2023-53608
CVE-2023-53608
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential UAF of struct nilfs_sc_info in nilfs_segctor_thread() The finalization of nilfs_segctor_thread() can race with nilfs_segctor_kill_thread() which terminates that thread, potentially causing a use-after-free BUG as KASAN detected. At the end of nilfs_segctor_thread(), it assigns NULL to "sc_task" member of "struct nilfs_sc_info" to indicate the thread has finished, and then notifies nilfs_segctor_kill_thread() of this using waitqueue "sc_wait_task" on the struct nilfs_sc_info. However, here, immediately after the NULL assignment to "sc_task", it is possible that nilfs_segctor_kill_thread() will detect it and return to continue the deallocation, freeing the nilfs_sc_info structure before the thread does the notification. This fixes the issue by protecting the NULL assignment to "sc_task" and its notification, with spinlock "sc_state_lock" of the struct nilfs_sc_info. Since nilfs_segctor_kill_thread() does a final check to see if "sc_task" is NULL with "sc_state_lock" locked, this can eliminate the race.
Prodotti e versioni affette
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 2.6.30 → 4.14.313 |
| linux | linux_kernel · 4.15 → 4.19.281 |
| linux | linux_kernel · 4.20 → 5.4.241 |
| linux | linux_kernel · 5.11 → 5.15.107 |
| linux | linux_kernel · 5.16 → 6.1.24 |
| linux | linux_kernel · 5.5 → 5.10.178 |
| linux | linux_kernel · 6.2 → 6.2.11 |