Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: netlink: fix potential deadlock in netlink_set_err() syzbot reported a possible deadlock in netlink_set_err() [1] A similar issue was fixed in commit 1d482e666b8e ("netlink: disable IRQs for netlink_lock_table()") in netlink_lock_table() This patch adds IRQ safety to netlink_set_err() and __netlink_diag_dump() which were not covered by cited commit. [1] WARNING: possible irq lock inversion dependency detected 6.4.0-rc6-syzkaller-00240-g4e9f0ec38852 #0 Not tainted syz-executor.2/23011 just changed the state of lock: ffffffff8e1a7a58 (nl_table_lock){.+.?}-{2:2}, at: netlink_set_err+0x2e/0x3a0 net/netlink/af_netlink.c:1612 but this lock was taken by another, SOFTIRQ-safe lock in the past: (&local->queue_stop_reason_lock){..-.}-{2:2} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(nl_table_lock); local_irq_disable(); lock(&local->queue_stop_reason_lock); lock(nl_table_lock); <Interrupt> lock(&local->queue_stop_reason_lock); *** DEADLOCK ***
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 82b2ea5f904b3826934df4a00f3b8806272185f6 before c09e8e3f7fd432984bf5422302b093d2371dfc48; affected 59fba11d649854134c75ad88c8adafa9304ac419 before 4b9adb8d4a62ff7608d4a7d4eb42036a88f30980; affected 21df0c2e7d195de4a3c650de9361b3037fa6c59a before 8f6652ed2ad98fe6d13b903483d9257762ab2ec6; affected 1d6d43d4805da9b3fa0f5841e8b1083c89868f35 before cde7b90e0539a3b11da377e463dfd2288a162dbf; affected 1d482e666b8e74c7555dbdfbfb77205eeed3ff2d before a641240b7e071c5538dc0e7894ece833fce459dd; affected 1d482e666b8e74c7555dbdfbfb77205eeed3ff2d before 61ffe8b1ee084e5c82a4e4bbf9e7b68e0c06e464; affected 1d482e666b8e74c7555dbdfbfb77205eeed3ff2d before eb8e27c8fa9397b4a7b181c48fa58157dbe9902e; affected 1d482e666b8e74c7555dbdfbfb77205eeed3ff2d before 1556ba034b95cfd4f75ea93c1a2679ae0444bba1; affected 1d482e666b8e74c7555dbdfbfb77205eeed3ff2d before 8d61f926d42045961e6b65191c09e3678d86a9cf; affected 5f155c4046200f067b1dc3140ea99ef56e4e0b74; affected a8e9111a8625dd11e70edd61f7a1ccd26c041442; affected 76cc8e04f38c2bbfcba07f62864a011f142bd40c; affected 4.14.237 before 4.14.322; affected 4.19.195 before 4.19.291; affected 5.4.126 before 5.4.251; affected 5.10.44 before 5.10.188; affected 4.4.273 before 4.5; affected 4.9.273 before 4.10; affected 5.12.11 before 5.13 |
| Linux / Linux | affected 5.13; unaffected 0 before 5.13; unaffected 4.14.322 through 4.14.*; unaffected 4.19.291 through 4.19.*; unaffected 5.4.251 through 5.4.*; unaffected 5.10.188 through 5.10.*; unaffected 5.15.121 through 5.15.*; unaffected 6.1.39 through 6.1.*; unaffected 6.3.13 through 6.3.*; unaffected 6.4.4 through 6.4.*; unaffected 6.5 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c09e8e3f7fd432984bf5422302b093d2371dfc48
- https://git.kernel.org/stable/c/4b9adb8d4a62ff7608d4a7d4eb42036a88f30980
- https://git.kernel.org/stable/c/8f6652ed2ad98fe6d13b903483d9257762ab2ec6
- https://git.kernel.org/stable/c/cde7b90e0539a3b11da377e463dfd2288a162dbf
- https://git.kernel.org/stable/c/a641240b7e071c5538dc0e7894ece833fce459dd
- https://git.kernel.org/stable/c/61ffe8b1ee084e5c82a4e4bbf9e7b68e0c06e464
- https://git.kernel.org/stable/c/eb8e27c8fa9397b4a7b181c48fa58157dbe9902e
- https://git.kernel.org/stable/c/1556ba034b95cfd4f75ea93c1a2679ae0444bba1
- https://git.kernel.org/stable/c/8d61f926d42045961e6b65191c09e3678d86a9cf