CVE-2023-53731
Description
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 ***
How to fix
- Linux Linuxc09e8e3f7fd432984bf5422302b093d2371dfc48, 4b9adb8d4a62ff7608d4a7d4eb42036a88f30980, 8f6652ed2ad98fe6d13b903483d9257762ab2ec6, cde7b90e0539a3b11da377e463dfd2288a162dbf, a641240b7e071c5538dc0e7894ece833fce459dd, 61ffe8b1ee084e5c82a4e4bbf9e7b68e0c06e464, eb8e27c8fa9397b4a7b181c48fa58157dbe9902e, 1556ba034b95cfd4f75ea93c1a2679ae0444bba1, 8d61f926d42045961e6b65191c09e3678d86a9cf, 4.14.322, 4.19.291, 5.4.251, 5.10.188, 4.5, 4.10, 5.13 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 82b2ea5f904b3826934df4a00f3b8806272185f6 ≤ v < c09e8e3f7fd432984bf5422302b093d2371dfc48, 59fba11d649854134c75ad88c8adafa9304ac419 ≤ v < 4b9adb8d4a62ff7608d4a7d4eb42036a88f30980, 21df0c2e7d195de4a3c650de9361b3037fa6c59a ≤ v < 8f6652ed2ad98fe6d13b903483d9257762ab2ec6, 1d6d43d4805da9b3fa0f5841e8b1083c89868f35 ≤ v < cde7b90e0539a3b11da377e463dfd2288a162dbf, 1d482e666b8e74c7555dbdfbfb77205eeed3ff2d ≤ v < a641240b7e071c5538dc0e7894ece833fce459dd, 1d482e666b8e74c7555dbdfbfb77205eeed3ff2d ≤ v < 61ffe8b1ee084e5c82a4e4bbf9e7b68e0c06e464, 1d482e666b8e74c7555dbdfbfb77205eeed3ff2d ≤ v < eb8e27c8fa9397b4a7b181c48fa58157dbe9902e, 1d482e666b8e74c7555dbdfbfb77205eeed3ff2d ≤ v < 1556ba034b95cfd4f75ea93c1a2679ae0444bba1, 1d482e666b8e74c7555dbdfbfb77205eeed3ff2d ≤ v < 8d61f926d42045961e6b65191c09e3678d86a9cf, 5f155c4046200f067b1dc3140ea99ef56e4e0b74, a8e9111a8625dd11e70edd61f7a1ccd26c041442, 76cc8e04f38c2bbfcba07f62864a011f142bd40c, 4.14.237 ≤ v < 4.14.322, 4.19.195 ≤ v < 4.19.291, 5.4.126 ≤ v < 5.4.251, 5.10.44 ≤ v < 5.10.188, 4.4.273 ≤ v < 4.5, 4.9.273 ≤ v < 4.10, 5.12.11 ≤ v < 5.13, 5.13 | c09e8e3f7fd432984bf5422302b093d2371dfc48, 4b9adb8d4a62ff7608d4a7d4eb42036a88f30980, 8f6652ed2ad98fe6d13b903483d9257762ab2ec6, cde7b90e0539a3b11da377e463dfd2288a162dbf, a641240b7e071c5538dc0e7894ece833fce459dd, 61ffe8b1ee084e5c82a4e4bbf9e7b68e0c06e464, eb8e27c8fa9397b4a7b181c48fa58157dbe9902e, 1556ba034b95cfd4f75ea93c1a2679ae0444bba1, 8d61f926d42045961e6b65191c09e3678d86a9cf, 4.14.322, 4.19.291, 5.4.251, 5.10.188, 4.5, 4.10, 5.13 |
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