WARNING: locking bug in ip6_datagram

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	WARNING: locking bug in ip6_datagram_connect	4				1	1635d	1635d	0/1	auto-closed as invalid on 2021/09/13 10:50
upstream	WARNING: locking bug in ip6_datagram_connect net	4	syz	inconclusive	inconclusive	12	1033d	1801d	0/29	auto-obsoleted due to no activity on 2023/05/08 01:15

WARNING: CPU: 0 PID: 1051 at kernel/locking/lockdep.c:698 arch_local_save_flags arch/x86/include/asm/paravirt.h:784 [inline] WARNING: CPU: 0 PID: 1051 at kernel/locking/lockdep.c:698 look_up_lock_class kernel/locking/lockdep.c:689 [inline] WARNING: CPU: 0 PID: 1051 at kernel/locking/lockdep.c:698 register_lock_class+0x77b/0x11c0 kernel/locking/lockdep.c:749 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 1051 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 __warn.cold+0x20/0x5a kernel/panic.c:541 report_bug+0x262/0x2b0 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:look_up_lock_class kernel/locking/lockdep.c:698 [inline] RIP: 0010:register_lock_class+0x77b/0x11c0 kernel/locking/lockdep.c:749 Code: 8b 05 c9 63 ec 0b 85 c0 0f 85 17 ff ff ff 48 c7 c6 e0 1b 6a 88 48 c7 c7 40 19 6a 88 e8 c3 29 a8 06 0f 0b e9 fd fe ff ff 0f 0b <0f> 0b e9 b3 fa ff ff 48 8d 70 01 48 69 c0 50 01 00 00 48 89 35 ac RSP: 0018:ffff8880507c7a30 EFLAGS: 00010087 RAX: dffffc0000000000 RBX: ffff8880946560e0 RCX: 0000000000000000 RDX: 1ffff110128cac1f RSI: 0000000000000000 RDI: ffff8880946560f8 RBP: 0000000000000000 R08: 0000000000000000 R09: 1ffff1100a0f8f4e R10: ffffffff8d243760 R11: 0000000000000000 R12: ffffffff8cdd43d0 R13: ffffffff894c35a0 R14: 1ffff1100a0f8f4e R15: 0000000000000000 __lock_acquire+0x17d/0x3ff0 kernel/locking/lockdep.c:3304 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:168 spin_lock_bh include/linux/spinlock.h:334 [inline] release_sock+0x1b/0x1b0 net/core/sock.c:2899 ip6_datagram_connect+0x36/0x40 net/ipv6/datagram.c:276 inet_dgram_connect+0x14a/0x2d0 net/ipv4/af_inet.c:571 __sys_connect+0x265/0x2c0 net/socket.c:1775 __do_sys_connect net/socket.c:1786 [inline] __se_sys_connect net/socket.c:1783 [inline] __x64_sys_connect+0x6f/0xb0 net/socket.c:1783 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f891ede83c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f891d73c168 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f891eefb050 RCX: 00007f891ede83c9 RDX: 000000000000001c RSI: 0000000020000040 RDI: 0000000000000006 RBP: 00007f891ee4333f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffc9eb310f R14: 00007f891d73c300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..