bisecting fixing commit since a1b977b49b66c75e6c51a515f6700371ae720217
building syzkaller on 6e262c73cd452097096f0b4d5d96f5ae496bc021
testing commit a1b977b49b66c75e6c51a515f6700371ae720217 with gcc (GCC) 8.4.1 20210217
kernel signature: ff7c191e2886fcc13c4a7c740f5356d1d88a5763272b3b8312a2b2313c58395f
all runs: crashed: BUG: looking up invalid subclass: 8
testing current HEAD 2965db2e004cf9c92b87c1f559e9812c0ae878c1
testing commit 2965db2e004cf9c92b87c1f559e9812c0ae878c1 with gcc (GCC) 8.4.1 20210217
kernel signature: 6430822cd1bd4d4eb8e6dd4640255ce04cc8151874959d85e9f548062b612b36
all runs: crashed: BUG: looking up invalid subclass: 8
revisions tested: 2, total time: 36m37.91315025s (build: 17m43.177893528s, test: 18m30.621316116s)
the crash still happens on HEAD
commit msg: Linux 4.19.188
crash: BUG: looking up invalid subclass: 8
team0 (unregistering): Port device team_slave_0 removed
bond0 (unregistering): Releasing backup interface bond_slave_1
bond0 (unregistering): Releasing backup interface bond_slave_0
bond0 (unregistering): Released all slaves
BUG: looking up invalid subclass: 8
turning off the locking correctness validator.
CPU: 0 PID: 27623 Comm: syz-executor053 Not tainted 4.19.188-syzkaller #0
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+0x17c/0x226 lib/dump_stack.c:118
 look_up_lock_class kernel/locking/lockdep.c:662 [inline]
 register_lock_class+0x730/0x1b10 kernel/locking/lockdep.c:748
 __lockdep_init_map+0x271/0x590 kernel/locking/lockdep.c:3214
 lockdep_init_map+0x9/0x10 kernel/locking/lockdep.c:3223
 vlan_dev_set_lockdep_class net/8021q/vlan_dev.c:511 [inline]
 vlan_dev_init+0x75d/0xba0 net/8021q/vlan_dev.c:606
 register_netdevice+0x269/0xfa0 net/core/dev.c:8652
 register_vlan_dev+0x253/0x690 net/8021q/vlan.c:172
 vlan_newlink+0x3f2/0x680 net/8021q/vlan_netlink.c:189
 rtnl_newlink+0xce2/0x1360 net/core/rtnetlink.c:3141
 rtnetlink_rcv_msg+0x34f/0x950 net/core/rtnetlink.c:4778
 netlink_rcv_skb+0x13e/0x3d0 net/netlink/af_netlink.c:2455
 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:4796
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x443/0x660 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x667/0xc60 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xac/0xf0 net/socket.c:632
 ___sys_sendmsg+0x647/0x950 net/socket.c:2115
 __sys_sendmsg+0xd9/0x180 net/socket.c:2153
 __do_sys_sendmsg net/socket.c:2162 [inline]
 __se_sys_sendmsg net/socket.c:2160 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2160
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440dd9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 41 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd92c91cf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000440dd9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000064daa
R13: 00007ffd92c91d50 R14: 00007ffd92c91d40 R15: 00007ffd92c91d14