First published: Wed Apr 17 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Software | Affected Version | How to fix |
---|---|---|
redhat/kernel | <4.19.311 | 4.19.311 |
redhat/kernel | <5.4.273 | 5.4.273 |
redhat/kernel | <5.10.214 | 5.10.214 |
redhat/kernel | <5.15.153 | 5.15.153 |
redhat/kernel | <6.1.83 | 6.1.83 |
redhat/kernel | <6.6.23 | 6.6.23 |
redhat/kernel | <6.7.11 | 6.7.11 |
redhat/kernel | <6.8.2 | 6.8.2 |
redhat/kernel | <6.9 | 6.9 |
debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.11.10-1 |
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