------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: CPU: 0 PID: 18867 at kernel/locking/lockdep.c:167 hlock_class kernel/locking/lockdep.c:167 [inline]
WARNING: CPU: 0 PID: 18867 at kernel/locking/lockdep.c:167 mark_lock+0x8d2/0x1650 kernel/locking/lockdep.c:3642
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 18867 Comm: syz-executor.1 Not tainted 5.6.0-rc3-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+0x1fb/0x318 lib/dump_stack.c:118
 panic+0x264/0x7a9 kernel/panic.c:221
 __warn+0x209/0x210 kernel/panic.c:582
 report_bug+0x1b6/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0xcf/0x1c0 arch/x86/kernel/traps.c:267
 do_invalid_op+0x36/0x40 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:mark_lock+0x8d2/0x1650 kernel/locking/lockdep.c:3642
Code: 0f 85 af 02 00 00 83 3d 6f a6 0d 08 00 0f 85 7a f8 ff ff 31 db 48 c7 c7 bd aa e3 88 48 c7 c6 76 6b e8 88 31 c0 e8 ce 8a ec ff <0f> 0b e9 6e f8 ff ff 4c 69 f3 b0 00 00 00 48 c7 c0 90 08 c2 89 4c
RSP: 0018:ffffc90007d2f3a0 EFLAGS: 00010046
RAX: 089d8d07fb558500 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90004f69000 RSI: 0000000000008604 RDI: 0000000000008605
RBP: ffffc90007d2f4a0 R08: ffffffff817cb4ba R09: fffffbfff125af8f
R10: fffffbfff125af8f R11: 0000000000000000 R12: 1ffff1100854c989
R13: dffffc0000000000 R14: 0000000000000002 R15: 0000000000000004
 mark_usage kernel/locking/lockdep.c:3579 [inline]
 __lock_acquire+0x636/0x1bc0 kernel/locking/lockdep.c:3908
 lock_acquire+0x154/0x250 kernel/locking/lockdep.c:4484
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
 _raw_spin_lock_bh+0x34/0x50 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:343 [inline]
 netif_addr_lock_bh include/linux/netdevice.h:4162 [inline]
 dev_mc_seq_show+0x41/0x210 net/core/net-procfs.c:325
 seq_read+0xa59/0xdb0 fs/seq_file.c:268
 proc_reg_read+0x1d5/0x2e0 fs/proc/inode.c:223
 do_loop_readv_writev fs/read_write.c:714 [inline]
 do_iter_read+0x4a2/0x5b0 fs/read_write.c:935
 vfs_readv+0xc2/0x120 fs/read_write.c:1053
 kernel_readv fs/splice.c:365 [inline]
 default_file_splice_read+0x579/0xa40 fs/splice.c:422
 do_splice_to fs/splice.c:892 [inline]
 splice_direct_to_actor+0x3c9/0xb90 fs/splice.c:971
 do_splice_direct+0x200/0x330 fs/splice.c:1080
 do_sendfile+0x7e4/0xfd0 fs/read_write.c:1520
 __do_sys_sendfile64 fs/read_write.c:1581 [inline]
 __se_sys_sendfile64 fs/read_write.c:1567 [inline]
 __x64_sys_sendfile64+0x176/0x1b0 fs/read_write.c:1567
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c449
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f34da63bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f34da63c6d4 RCX: 000000000045c449
RDX: 0000000000000000 RSI: 000000000000000c RDI: 000000000000000b
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000001000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000008d1 R14: 00000000004cb344 R15: 000000000076bf2c
Kernel Offset: disabled
Rebooting in 86400 seconds..