INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 0 PID: 32580 Comm: syz-executor.4 Not tainted 4.19.181-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+0x1fc/0x2ef lib/dump_stack.c:118 assign_lock_key kernel/locking/lockdep.c:727 [inline] register_lock_class+0xe76/0x11c0 kernel/locking/lockdep.c:753 __lock_acquire+0x17d/0x3ff0 kernel/locking/lockdep.c:3303 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3907 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:152 skb_dequeue+0x1c/0x180 net/core/skbuff.c:2834 skb_queue_purge+0x21/0x30 net/core/skbuff.c:2872 l2cap_chan_del+0x690/0xa50 net/bluetooth/l2cap_core.c:637 l2cap_chan_close+0x1b5/0x950 net/bluetooth/l2cap_core.c:757 l2cap_sock_shutdown+0x339/0xe10 net/bluetooth/l2cap_sock.c:1159 l2cap_sock_release+0x77/0x290 net/bluetooth/l2cap_sock.c:1202 __sock_release+0xcd/0x2a0 net/socket.c:579 sock_close+0x15/0x20 net/socket.c:1140 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x41926b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffc482168a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000041926b RDX: ffffffffffffffbc RSI: 0000000008c9f276 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2ca2212c R10: 00007ffc48216990 R11: 0000000000000293 R12: 00000000000b6e69 R13: 00000000000003e8 R14: 000000000056bf60 R15: 00000000000b6e4e FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) audit: type=1804 audit(1616147242.754:124): pid=811 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir718768312/syzkaller.sj4Sok/152/file0/bus" dev="loop5" ino=36 res=1 audit: type=1804 audit(1616147242.824:125): pid=799 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir718768312/syzkaller.sj4Sok/152/file0/bus" dev="loop5" ino=36 res=1 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) audit: type=1804 audit(1616147243.354:126): pid=851 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir718768312/syzkaller.sj4Sok/153/file0/bus" dev="loop5" ino=38 res=1 FAT-fs (loop3): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) audit: type=1804 audit(1616147243.804:127): pid=890 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir718768312/syzkaller.sj4Sok/154/file0/bus" dev="loop5" ino=40 res=1 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) audit: type=1804 audit(1616147244.254:128): pid=920 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir718768312/syzkaller.sj4Sok/155/file0/bus" dev="loop5" ino=41 res=1 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) audit: type=1804 audit(1616147244.544:129): pid=962 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir338324683/syzkaller.PMHLSK/349/bus" dev="sda1" ino=15115 res=1 audit: type=1804 audit(1616147244.754:130): pid=964 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir718768312/syzkaller.sj4Sok/156/file0/bus" dev="loop5" ino=42 res=1 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) audit: type=1804 audit(1616147245.174:131): pid=1009 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir269666725/syzkaller.NlzrrU/606/file0/bus" dev="sda1" ino=15116 res=1 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) audit: type=1804 audit(1616147245.464:132): pid=1034 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir718768312/syzkaller.sj4Sok/157/file0/bus" dev="loop5" ino=43 res=1 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) audit: type=1804 audit(1616147245.664:133): pid=1065 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir338324683/syzkaller.PMHLSK/350/bus" dev="sda1" ino=15108 res=1 IPVS: ftp: loaded support on port[0] = 21 FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) IPVS: ftp: loaded support on port[0] = 21 FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)