bisecting fixing commit since 2f166cdcf8a92fcf85524f2b5526cb28e16f0a60
building syzkaller on abf9ba4fc75d9b29af15625d44dcfc1360fad3b7
testing commit 2f166cdcf8a92fcf85524f2b5526cb28e16f0a60 with gcc (GCC) 8.1.0
kernel signature: 1eeee5e8f9c80cc543576cb6e838a283741f6e6d2ee0720a6218ecc057665568
all runs: crashed: BUG: looking up invalid subclass: 8
testing current HEAD c196b3a9c83ae3491280b739d231d02b3cb9d041
testing commit c196b3a9c83ae3491280b739d231d02b3cb9d041 with gcc (GCC) 8.1.0
kernel signature: 81ce0c18c4fb3ee80fbe84e82ff876ece1ca672b647a6e9dacbc221e3256f8d0
all runs: crashed: BUG: looking up invalid subclass: 8
revisions tested: 2, total time: 40m36.137782391s (build: 20m15.057936666s, test: 19m46.745270846s)
the crash still happens on HEAD
commit msg: Linux 4.14.210
crash: BUG: looking up invalid subclass: 8
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
8021q: VLANs not supported on hsr0
8021q: VLANs not supported on hsr0
8021q: VLANs not supported on ipvlan1
8021q: VLANs not supported on ipvlan1
BUG: looking up invalid subclass: 8
turning off the locking correctness validator.
CPU: 0 PID: 25487 Comm: syz-executor999 Not tainted 4.14.210-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x14b/0x1f1 lib/dump_stack.c:58
 look_up_lock_class kernel/locking/lockdep.c:673 [inline]
 register_lock_class+0x77d/0x19a0 kernel/locking/lockdep.c:756
 __lockdep_init_map+0x271/0x550 kernel/locking/lockdep.c:3277
 lockdep_init_map+0x9/0x10 kernel/locking/lockdep.c:3287
 vlan_dev_set_lockdep_class net/8021q/vlan_dev.c:509 [inline]
 vlan_dev_init+0x75d/0xba0 net/8021q/vlan_dev.c:604
 register_netdevice+0x255/0xe50 net/core/dev.c:7590
 register_vlan_dev+0x24f/0x650 net/8021q/vlan.c:168
 vlan_newlink+0x366/0x4d0 net/8021q/vlan_netlink.c:165
 rtnl_newlink+0xc2b/0x13a0 net/core/rtnetlink.c:2728
 rtnetlink_rcv_msg+0x34c/0x9e0 net/core/rtnetlink.c:4316
 netlink_rcv_skb+0x12f/0x3b0 net/netlink/af_netlink.c:2433
 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:4328
 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline]
 netlink_unicast+0x40b/0x610 net/netlink/af_netlink.c:1313
 netlink_sendmsg+0x657/0xc60 net/netlink/af_netlink.c:1878
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xac/0xf0 net/socket.c:656
 ___sys_sendmsg+0x625/0x920 net/socket.c:2062
 __sys_sendmsg+0xc1/0x140 net/socket.c:2096
 SYSC_sendmsg net/socket.c:2107 [inline]
 SyS_sendmsg+0xd/0x20 net/socket.c:2103
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x4496f9
RSP: 002b:00007f98c1d4bdb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000006dec48 RCX: 00000000004496f9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 00000000006dec40 R08: 0000000000000018 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 00000000006dec4c
R13: 00007ffeccfcaa9f R14: 00007f98c1d4c9c0 R15: 00000000006dec4c
Dead loop on virtual device vlan926, fix it urgently!
Dead loop on virtual device vlan928, fix it urgently!
Dead loop on virtual device vlan930, fix it urgently!
Dead loop on virtual device vlan928, fix it urgently!
Dead loop on virtual device vlan932, fix it urgently!
Dead loop on virtual device vlan934, fix it urgently!
Dead loop on virtual device vlan936, fix it urgently!
Dead loop on virtual device vlan938, fix it urgently!
Dead loop on virtual device vlan940, fix it urgently!
Dead loop on virtual device vlan934, fix it urgently!
net_ratelimit: 1423 callbacks suppressed
Dead loop on virtual device vlan1166, fix it urgently!
Dead loop on virtual device vlan1086, fix it urgently!
Dead loop on virtual device vlan1002, fix it urgently!
Dead loop on virtual device vlan992, fix it urgently!
Dead loop on virtual device vlan998, fix it urgently!
Dead loop on virtual device vlan1088, fix it urgently!
Dead loop on virtual device vlan1006, fix it urgently!
Dead loop on virtual device vlan1016, fix it urgently!
Dead loop on virtual device vlan1010, fix it urgently!
Dead loop on virtual device vlan1162, fix it urgently!