syzbot

------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 0 PID: 10812 at kernel/locking/lockdep.c:167 hlock_class kernel/locking/lockdep.c:167 [inline]
WARNING: CPU: 0 PID: 10812 at kernel/locking/lockdep.c:167 hlock_class kernel/locking/lockdep.c:156 [inline]
WARNING: CPU: 0 PID: 10812 at kernel/locking/lockdep.c:167 mark_lock+0x22b/0x1220 kernel/locking/lockdep.c:3643
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 10812 Comm: syz-executor912 Not tainted 5.5.0-rc5-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+0x197/0x210 lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x3e kernel/panic.c:582
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:hlock_class kernel/locking/lockdep.c:167 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:156 [inline]
RIP: 0010:mark_lock+0x22b/0x1220 kernel/locking/lockdep.c:3643
Code: d0 7c 08 84 d2 0f 85 a8 0e 00 00 44 8b 1d fd 22 21 09 45 85 db 75 b6 48 c7 c6 20 95 2b 88 48 c7 c7 60 95 2b 88 e8 94 3e eb ff <0f> 0b 31 db e9 aa fe ff ff 48 c7 c7 20 35 66 8b e8 70 4e 58 00 e9
RSP: 0018:ffffc90001e771c8 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815e8506 RDI: fffff520003cee2b
RBP: ffffc90001e77218 R08: ffff888097e98440 R09: fffffbfff1333511
R10: fffffbfff1333510 R11: ffffffff8999a883 R12: 0000000000000002
R13: ffff888097e98d28 R14: 0000000000000000 R15: 00000000000405d8
 mark_usage kernel/locking/lockdep.c:3580 [inline]
 __lock_acquire+0x1370/0x4a00 kernel/locking/lockdep.c:3909
 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4485
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:343 [inline]
 netif_addr_lock_bh include/linux/netdevice.h:4092 [inline]
 dev_mc_seq_show net/core/net-procfs.c:325 [inline]
 dev_mc_seq_show+0x3e/0x240 net/core/net-procfs.c:317
 seq_read+0xad7/0x1170 fs/seq_file.c:268
 proc_reg_read+0x1fc/0x2c0 fs/proc/inode.c:223
 do_loop_readv_writev fs/read_write.c:714 [inline]
 do_loop_readv_writev fs/read_write.c:701 [inline]
 do_iter_read+0x4a4/0x660 fs/read_write.c:935
 vfs_readv+0xf0/0x160 fs/read_write.c:997
 kernel_readv fs/splice.c:365 [inline]
 default_file_splice_read+0x4fb/0xa20 fs/splice.c:422
 do_splice_to+0x127/0x180 fs/splice.c:892
 splice_direct_to_actor+0x320/0xa30 fs/splice.c:971
 do_splice_direct+0x1da/0x2a0 fs/splice.c:1080
 do_sendfile+0x597/0xd00 fs/read_write.c:1464
 __do_sys_sendfile64 fs/read_write.c:1525 [inline]
 __se_sys_sendfile64 fs/read_write.c:1511 [inline]
 __x64_sys_sendfile64+0x1dd/0x220 fs/read_write.c:1511
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x447709
Code: e8 ec 0e 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 fb 06 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f98d03bccf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00000000006dcc98 RCX: 0000000000447709
RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000005
RBP: 00000000006dcc90 R08: 0000000000000000 R09: 0000000000000000
R10: 000000006f0a77bd R11: 0000000000000246 R12: 00000000006dcc9c
R13: 00007f98d03bcd10 R14: 00007f98d03bcd10 R15: a7ffffffffffffde
Kernel Offset: disabled
Rebooting in 86400 seconds..