loop5: rw=1, want=71, limit=6
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 15036 Comm: syz-executor.4 Not tainted 4.14.231-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 register_lock_class+0x32b/0x1320 kernel/locking/lockdep.c:768
 __lock_acquire+0x167/0x3f20 kernel/locking/lockdep.c:3378
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160
 skb_dequeue+0x1c/0x180 net/core/skbuff.c:2831
 skb_queue_purge+0x21/0x30 net/core/skbuff.c:2869
 l2cap_chan_del+0x56d/0x950 net/bluetooth/l2cap_core.c:637
 l2cap_chan_close+0x103/0x870 net/bluetooth/l2cap_core.c:757
 l2cap_sock_shutdown+0x2e7/0xc20 net/bluetooth/l2cap_sock.c:1160
 l2cap_sock_release+0x77/0x280 net/bluetooth/l2cap_sock.c:1203
 __sock_release+0xcd/0x2b0 net/socket.c:602
 sock_close+0x15/0x20 net/socket.c:1139
 __fput+0x25f/0x7a0 fs/file_table.c:210
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 get_signal+0x18a3/0x1ca0 kernel/signal.c:2234
 do_signal+0x7c/0x1550 arch/x86/kernel/signal.c:792
 exit_to_usermode_loop+0x160/0x200 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x466459
RSP: 002b:00007f53e8ce7188 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: fffffffffffffffc RBX: 000000000056c0b0 RCX: 0000000000466459
RDX: 000000000000000e RSI: 0000000020000100 RDI: 0000000000000004
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0
R13: 00007ffcef01b89f R14: 00007f53e8ce7300 R15: 0000000000022000
Cannot find add_set index 0 as target
FAT-fs (loop5): Directory bread(block 6) failed
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
Cannot find add_set index 0 as target
attempt to access beyond end of device
loop5: rw=1, want=71, limit=6
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
Bluetooth: hci0 command 0x0406 tx timeout
Bluetooth: hci2 command 0x0406 tx timeout
Bluetooth: hci5 command 0x0406 tx timeout
Bluetooth: hci1 command 0x0406 tx timeout
Bluetooth: hci3 command 0x0406 tx timeout
Bluetooth: hci4 command 0x0406 tx timeout
Cannot find add_set index 0 as target
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (60935!=0)
EXT4-fs (loop5): orphan cleanup on readonly fs
EXT4-fs error (device loop5): ext4_quota_enable:5716: inode #3: comm syz-executor.5: iget: bad i_size value: -4294934784
EXT4-fs (loop5): Remounting filesystem read-only
EXT4-fs error (device loop5): ext4_quota_enable:5718: comm syz-executor.5: Bad quota inode # 3
EXT4-fs warning (device loop5): ext4_enable_quotas:5758: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix.
EXT4-fs (loop5): Cannot turn on quotas: error -117
EXT4-fs (loop5): mounted filesystem without journal. Opts: errors=remount-ro,
Cannot find add_set index 0 as target
TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (60935!=0)
EXT4-fs (loop5): orphan cleanup on readonly fs
EXT4-fs error (device loop5): ext4_quota_enable:5716: inode #3: comm syz-executor.5: iget: bad i_size value: -4294934784
EXT4-fs (loop5): Remounting filesystem read-only
EXT4-fs error (device loop5): ext4_quota_enable:5718: comm syz-executor.5: Bad quota inode # 3
EXT4-fs warning (device loop5): ext4_enable_quotas:5758: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor.0'.
EXT4-fs (loop5): Cannot turn on quotas: error -117
netlink: 3 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor.0'.
EXT4-fs (loop5): mounted filesystem without journal. Opts: errors=remount-ro,
netlink: 3 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 3 bytes leftover after parsing attributes in process `syz-executor.0'.
EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (60935!=0)
EXT4-fs (loop5): orphan cleanup on readonly fs
netlink: 3 bytes leftover after parsing attributes in process `syz-executor.0'.
EXT4-fs error (device loop5): ext4_quota_enable:5716: inode #3: comm syz-executor.5: iget: bad i_size value: -4294934784
netlink: 3 bytes leftover after parsing attributes in process `syz-executor.0'.
EXT4-fs (loop5): Remounting filesystem read-only
EXT4-fs error (device loop5): ext4_quota_enable:5718: comm syz-executor.5: Bad quota inode # 3
EXT4-fs warning (device loop5): ext4_enable_quotas:5758: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'.
EXT4-fs (loop5): Cannot turn on quotas: error -117
EXT4-fs (loop5): mounted filesystem without journal. Opts: errors=remount-ro,
netlink: 3 bytes leftover after parsing attributes in process `syz-executor.0'.
EXT4-fs (loop5): ext4_check_descriptors: Checksum for group 0 failed (60935!=0)
EXT4-fs (loop5): orphan cleanup on readonly fs
EXT4-fs error (device loop5): ext4_quota_enable:5716: inode #3: comm syz-executor.5: iget: bad i_size value: -4294934784
EXT4-fs (loop5): Remounting filesystem read-only
EXT4-fs error (device loop5): ext4_quota_enable:5718: comm syz-executor.5: Bad quota inode # 3
EXT4-fs warning (device loop5): ext4_enable_quotas:5758: Failed to enable quota tracking (type=-1, err=-117). Please run e2fsck to fix.
EXT4-fs (loop5): Cannot turn on quotas: error -117
EXT4-fs (loop5): mounted filesystem without journal. Opts: errors=remount-ro,
device batadv0 entered promiscuous mode
device batadv0 left promiscuous mode
device batadv0 entered promiscuous mode
device batadv0 left promiscuous mode
device batadv0 entered promiscuous mode
device batadv0 left promiscuous mode
device batadv0 entered promiscuous mode
device batadv0 left promiscuous mode
device batadv0 entered promiscuous mode
device batadv0 left promiscuous mode
EXT4-fs (loop4): VFS: Can't find ext4 filesystem