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 ***
Product status
82b2ea5f904b3826934df4a00f3b8806272185f6 (git) before c09e8e3f7fd432984bf5422302b093d2371dfc48
59fba11d649854134c75ad88c8adafa9304ac419 (git) before 4b9adb8d4a62ff7608d4a7d4eb42036a88f30980
21df0c2e7d195de4a3c650de9361b3037fa6c59a (git) before 8f6652ed2ad98fe6d13b903483d9257762ab2ec6
1d6d43d4805da9b3fa0f5841e8b1083c89868f35 (git) before cde7b90e0539a3b11da377e463dfd2288a162dbf
1d482e666b8e74c7555dbdfbfb77205eeed3ff2d (git) before a641240b7e071c5538dc0e7894ece833fce459dd
1d482e666b8e74c7555dbdfbfb77205eeed3ff2d (git) before 61ffe8b1ee084e5c82a4e4bbf9e7b68e0c06e464
1d482e666b8e74c7555dbdfbfb77205eeed3ff2d (git) before eb8e27c8fa9397b4a7b181c48fa58157dbe9902e
1d482e666b8e74c7555dbdfbfb77205eeed3ff2d (git) before 1556ba034b95cfd4f75ea93c1a2679ae0444bba1
1d482e666b8e74c7555dbdfbfb77205eeed3ff2d (git) before 8d61f926d42045961e6b65191c09e3678d86a9cf
5f155c4046200f067b1dc3140ea99ef56e4e0b74 (git)
a8e9111a8625dd11e70edd61f7a1ccd26c041442 (git)
76cc8e04f38c2bbfcba07f62864a011f142bd40c (git)
5.13
Any version before 5.13
4.14.322 (semver)
4.19.291 (semver)
5.4.251 (semver)
5.10.188 (semver)
5.15.121 (semver)
6.1.39 (semver)
6.3.13 (semver)
6.4.4 (semver)
6.5 (original_commit_for_fix)
References
git.kernel.org/...c/c09e8e3f7fd432984bf5422302b093d2371dfc48
git.kernel.org/...c/4b9adb8d4a62ff7608d4a7d4eb42036a88f30980
git.kernel.org/...c/8f6652ed2ad98fe6d13b903483d9257762ab2ec6
git.kernel.org/...c/cde7b90e0539a3b11da377e463dfd2288a162dbf
git.kernel.org/...c/a641240b7e071c5538dc0e7894ece833fce459dd
git.kernel.org/...c/61ffe8b1ee084e5c82a4e4bbf9e7b68e0c06e464
git.kernel.org/...c/eb8e27c8fa9397b4a7b181c48fa58157dbe9902e
git.kernel.org/...c/1556ba034b95cfd4f75ea93c1a2679ae0444bba1
git.kernel.org/...c/8d61f926d42045961e6b65191c09e3678d86a9cf
