Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: quota: Fix potential NULL pointer dereference Below race may cause NULL pointer dereference P1 P2 dquot_free_inode quota_off drop_dquot_ref remove_dquot_ref dquots = i_dquot(inode) dquots = i_dquot(inode) srcu_read_lock dquots[cnt]) != NULL (1) dquots[type] = NULL (2) spin_lock(&dquots[cnt]->dq_dqb_lock) (3) .... If dquot_free_inode(or other routines) checks inode's quota pointers (1) before quota_off sets it to NULL(2) and use it (3) after that, NULL pointer dereference will be triggered. So let's fix it by using a temporary pointer to avoid this issue.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac before 8514899c1a4edf802f03c408db901063aa3f05a1; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac before 49669f8e7eb053f91d239df7b1bfb4500255a9d0; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac before 61380537aa6dd32d8a723d98b8f1bd1b11d8fee0; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac before 1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac before 7f9e833fc0f9b47be503af012eb5903086939754; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac before 40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac before f2649d98aa9ca8623149b3cb8df00c944f5655c7; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac before 6afc9f4434fa8063aa768c2bf5bf98583aee0877; affected 7b9ca4c61bc278b771fb57d6290a31ab1fc7fdac before d0aa72604fbd80c8aabb46eda00535ed35570f1f |
| Linux / Linux | affected 4.14; unaffected 0 before 4.14; unaffected 4.19.311 through 4.19.*; unaffected 5.4.273 through 5.4.*; unaffected 5.10.214 through 5.10.*; unaffected 5.15.153 through 5.15.*; unaffected 6.1.83 through 6.1.*; unaffected 6.6.23 through 6.6.*; unaffected 6.7.11 through 6.7.*; unaffected 6.8.2 through 6.8.*; unaffected 6.9 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1
- https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0
- https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0
- https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25
- https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754
- https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5
- https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7
- https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877
- https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f
ADP enrichment
No English description supplied.
- https://git.kernel.org/stable/c/8514899c1a4edf802f03c408db901063aa3f05a1
- https://git.kernel.org/stable/c/49669f8e7eb053f91d239df7b1bfb4500255a9d0
- https://git.kernel.org/stable/c/61380537aa6dd32d8a723d98b8f1bd1b11d8fee0
- https://git.kernel.org/stable/c/1ca72a3de915f87232c9a4cb9bebbd3af8ed3e25
- https://git.kernel.org/stable/c/7f9e833fc0f9b47be503af012eb5903086939754
- https://git.kernel.org/stable/c/40a673b4b07efd6f74ff3ab60f38b26aa91ee5d5
- https://git.kernel.org/stable/c/f2649d98aa9ca8623149b3cb8df00c944f5655c7
- https://git.kernel.org/stable/c/6afc9f4434fa8063aa768c2bf5bf98583aee0877
- https://git.kernel.org/stable/c/d0aa72604fbd80c8aabb46eda00535ed35570f1f
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
No English description supplied.
No references supplied.
No English description supplied.