New replicast peer: 255.255.255.255 Enabled bearer , priority 10 audit: type=1400 audit(1544562561.637:41): avc: denied { read } for pid=7703 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) WARNING: CPU: 1 PID: 7702 at kernel/locking/lockdep.c:3318 __lock_acquire+0x1615/0x4c20 kernel/locking/lockdep.c:3318 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7702 Comm: ip Not tainted 4.20.0-rc6+ #151 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 panic+0x2ad/0x55c kernel/panic.c:188 __warn.cold.8+0x20/0x45 kernel/panic.c:540 report_bug+0x254/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:__lock_acquire+0x1615/0x4c20 kernel/locking/lockdep.c:3318 Code: 00 00 8b 05 9d f2 b4 08 85 c0 89 84 24 98 00 00 00 0f 85 90 f3 ff ff 48 c7 c6 40 67 2b 88 48 c7 c7 a0 3c 2b 88 e8 cb 66 e7 ff <0f> 0b e9 81 f3 ff ff 48 c7 c2 e0 97 0f 8b 48 b8 00 00 00 00 00 fc RSP: 0018:ffff8881c22aeaf0 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 00000000e6c43089 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8165e495 RDI: 0000000000000006 RBP: ffff8881c22aee78 R08: ffff8881c237e440 R09: fffffbfff12b2314 R10: fffffbfff12b2314 R11: ffffffff895918a3 R12: 0000000000000001 R13: 00000000e6c43089 R14: ffff8881c237ed0a R15: ffff8881c237ece8 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] __queue_work+0x2ff/0x1440 kernel/workqueue.c:1417 __queue_delayed_work+0x29f/0x380 kernel/workqueue.c:1522 mod_delayed_work_on+0xe3/0x260 kernel/workqueue.c:1596 mod_delayed_work include/linux/workqueue.h:542 [inline] addrconf_mod_dad_work+0x3b/0x90 net/ipv6/addrconf.c:328 addrconf_dad_start+0x73/0xa0 net/ipv6/addrconf.c:3976 inet6_addr_add+0x5c2/0x980 net/ipv6/addrconf.c:2930 inet6_rtm_newaddr+0x1201/0x1b90 net/ipv6/addrconf.c:4757 rtnetlink_rcv_msg+0x46a/0xc20 net/core/rtnetlink.c:4950 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4968 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2116 __sys_sendmsg+0x11d/0x280 net/socket.c:2154 __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg net/socket.c:2161 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f3242f6a320 Code: 02 48 83 c8 ff eb 8d 48 8b 05 14 7b 2a 00 f7 da 64 89 10 48 83 c8 ff eb c9 90 83 3d d5 d2 2a 00 00 75 10 b8 2e 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e ba 00 00 48 89 04 24 RSP: 002b:00007ffd3e5a0f78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ffd3e5a5401 RCX: 00007f3242f6a320 RDX: 0000000000000000 RSI: 00007ffd3e5a0fb0 RDI: 0000000000000003 RBP: 00007ffd3e5a0fb0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000005c102783 R13: 0000000000000000 R14: 00000000006395c0 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..