WARNING: locking bug in ipv6

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING: locking bug in ipv6_setsockopt (2) net	syz	error	done	1	790d	1032d	0/26	closed as invalid on 2022/10/12 16:59

------------[ cut here ]------------ WARNING: CPU: 1 PID: 11501 at kernel/locking/lockdep.c:854 look_up_lock_class kernel/locking/lockdep.c:853 [inline] WARNING: CPU: 1 PID: 11501 at kernel/locking/lockdep.c:854 register_lock_class+0x225/0x1520 kernel/locking/lockdep.c:1201 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 11501 Comm: syz-executor.0 Not tainted 5.9.0-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+0x1d6/0x29e lib/dump_stack.c:118 panic+0x2c0/0x800 kernel/panic.c:231 __warn+0x227/0x250 kernel/panic.c:600 report_bug+0x1b1/0x2e0 lib/bug.c:198 handle_bug+0x42/0x80 arch/x86/kernel/traps.c:234 exc_invalid_op+0x16/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:853 [inline] RIP: 0010:register_lock_class+0x225/0x1520 kernel/locking/lockdep.c:1201 Code: 0f 84 cb 0a 00 00 43 80 3c 2f 00 48 8b 5c 24 08 74 08 48 89 df e8 fb fd 5a 00 48 c7 c0 30 a4 da 8a 48 39 03 0f 84 a7 0a 00 00 <0f> 0b e9 a0 0a 00 00 e8 8f d4 d1 06 48 c7 c7 9c a4 09 89 89 de 31 RSP: 0018:ffffc900169c7898 EFLAGS: 00010002 RAX: ffffffff8adaa430 RBX: ffff888094f2a0e0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888094f2a0e0 RBP: ffffffff8b00c308 R08: 0000000000000001 R09: 0000000000000000 R10: fffffbfff131e2e6 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffffff8929b0db R15: 1ffff110129e541c __lock_acquire+0xfd/0x2ae0 kernel/locking/lockdep.c:4305 lock_acquire+0x140/0x6f0 kernel/locking/lockdep.c:5006 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:359 [inline] lock_sock_nested+0x43/0x110 net/core/sock.c:3048 lock_sock include/net/sock.h:1583 [inline] do_ipv6_setsockopt net/ipv6/ipv6_sockglue.c:418 [inline] ipv6_setsockopt+0x40e/0x5460 net/ipv6/ipv6_sockglue.c:1003 __sys_setsockopt+0x4a9/0x870 net/socket.c:2132 __do_sys_setsockopt net/socket.c:2143 [inline] __se_sys_setsockopt net/socket.c:2140 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2140 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa40ab02c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000002f140 RCX: 000000000045d5b9 RDX: 0000000000000039 RSI: 0000000000000029 RDI: 0000000000000005 RBP: 000000000118d030 R08: 0000000000000018 R09: 0000000000000000 R10: 0000000020000040 R11: 0000000000000246 R12: 000000000118cfec R13: 00007fff2a874c1f R14: 00007fa40ab039c0 R15: 000000000118cfec Kernel Offset: disabled Rebooting in 86400 seconds..