sd 0:0:1:0: [sg0] tag#7495 CDB[30]: 87 d2 6e 65 2b 6d 89 94 54 ====================================================== WARNING: possible circular locking dependency detected 4.14.275-syzkaller #0 Not tainted ------------------------------------------------------ kworker/0:0/3 is trying to acquire lock: (&table[i].mutex){+.+.}, at: [] nf_tables_netdev_event+0x10d/0x4d0 net/netfilter/nf_tables_netdev.c:122 but task is already holding lock: (rtnl_mutex){+.+.}, at: [] ser_release+0xe9/0x240 drivers/net/caif/caif_serial.c:317 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (rtnl_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 unregister_netdevice_notifier+0x5e/0x2b0 net/core/dev.c:1630 tee_tg_destroy+0x5c/0xb0 net/netfilter/xt_TEE.c:123 cleanup_entry+0x1fd/0x2d0 net/ipv4/netfilter/ip_tables.c:666 __do_replace+0x38d/0x570 net/ipv4/netfilter/ip_tables.c:1086 do_replace net/ipv4/netfilter/ip_tables.c:1142 [inline] do_ipt_set_ctl+0x256/0x3a0 net/ipv4/netfilter/ip_tables.c:1676 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x5f/0xb0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x94/0xb0 net/ipv4/ip_sockglue.c:1240 tcp_setsockopt+0x7b/0xc0 net/ipv4/tcp.c:2830 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x110/0x1e0 net/socket.c:1844 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #1 (&xt[i].mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 target_revfn+0x43/0x210 net/netfilter/x_tables.c:354 xt_find_revision+0x15e/0x1d0 net/netfilter/x_tables.c:378 nfnl_compat_get+0x1f7/0x870 net/netfilter/nft_compat.c:678 nfnetlink_rcv_msg+0x9bb/0xc00 net/netfilter/nfnetlink.c:214 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2446 nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515 netlink_unicast_kernel net/netlink/af_netlink.c:1294 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1320 netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #0 (&table[i].mutex){+.+.}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 nf_tables_netdev_event+0x10d/0x4d0 net/netfilter/nf_tables_netdev.c:122 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1667 [inline] call_netdevice_notifiers net/core/dev.c:1683 [inline] rollback_registered_many+0x765/0xba0 net/core/dev.c:7211 rollback_registered+0xca/0x170 net/core/dev.c:7253 unregister_netdevice_queue+0x1b4/0x360 net/core/dev.c:8274 unregister_netdevice include/linux/netdevice.h:2444 [inline] ser_release+0x16f/0x240 drivers/net/caif/caif_serial.c:320 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 other info that might help us debug this: Chain exists of: &table[i].mutex --> &xt[i].mutex --> rtnl_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(&xt[i].mutex); lock(rtnl_mutex); lock(&table[i].mutex); *** DEADLOCK *** 3 locks held by kworker/0:0/3: #0: ("events"){+.+.}, at: [] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: (ser_release_work){+.+.}, at: [] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 #2: (rtnl_mutex){+.+.}, at: [] ser_release+0xe9/0x240 drivers/net/caif/caif_serial.c:317 stack backtrace: CPU: 0 PID: 3 Comm: kworker/0:0 Not tainted 4.14.275-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events ser_release Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 nf_tables_netdev_event+0x10d/0x4d0 net/netfilter/nf_tables_netdev.c:122 notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93 call_netdevice_notifiers_info net/core/dev.c:1667 [inline] call_netdevice_notifiers net/core/dev.c:1683 [inline] rollback_registered_many+0x765/0xba0 net/core/dev.c:7211 rollback_registered+0xca/0x170 net/core/dev.c:7253 unregister_netdevice_queue+0x1b4/0x360 net/core/dev.c:8274 unregister_netdevice include/linux/netdevice.h:2444 [inline] ser_release+0x16f/0x240 drivers/net/caif/caif_serial.c:320 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 sd 0:0:1:0: [sg0] tag#7470 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#7470 CDB: Receive copy failure details(LID1) sd 0:0:1:0: [sg0] tag#7470 CDB[00]: 84 04 3d 86 ab 45 ec 52 ab 64 77 a3 43 75 0f 23 sd 0:0:1:0: [sg0] tag#7470 CDB[10]: 89 9b 7d db 29 aa 79 44 5c fe c6 6f 9e e2 70 5f sd 0:0:1:0: [sg0] tag#7470 CDB[20]: 83 0b a0 35 7f bd 52 1c 5d e4 53 59 b8 e1 f2 33 sd 0:0:1:0: [sg0] tag#7470 CDB[30]: 87 d2 6e 65 2b 6d 89 94 54 sd 0:0:1:0: [sg0] tag#7470 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#7470 CDB: Receive copy failure details(LID1) sd 0:0:1:0: [sg0] tag#7470 CDB[00]: 84 04 3d 86 ab 45 ec 52 ab 64 77 a3 43 75 0f 23 sd 0:0:1:0: [sg0] tag#7470 CDB[10]: 89 9b 7d db 29 aa 79 44 5c fe c6 6f 9e e2 70 5f sd 0:0:1:0: [sg0] tag#7470 CDB[20]: 83 0b a0 35 7f bd 52 1c 5d e4 53 59 b8 e1 f2 33 sd 0:0:1:0: [sg0] tag#7470 CDB[30]: 87 d2 6e 65 2b 6d 89 94 54 BTRFS: device fsid 5fb0fab3-7c4b-461e-bb1f-587512e1a79b devid 1 transid 7 /dev/loop2 sd 0:0:1:0: [sg0] tag#7495 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#7495 CDB: Receive copy failure details(LID1) sd 0:0:1:0: [sg0] tag#7495 CDB[00]: 84 04 3d 86 ab 45 ec 52 ab 64 77 a3 43 75 0f 23 sd 0:0:1:0: [sg0] tag#7495 CDB[10]: 89 9b 7d db 29 aa 79 44 5c fe c6 6f 9e e2 70 5f sd 0:0:1:0: [sg0] tag#7495 CDB[20]: 83 0b a0 35 7f bd 52 1c 5d e4 53 59 b8 e1 f2 33 sd 0:0:1:0: [sg0] tag#7495 CDB[30]: 87 d2 6e 65 2b 6d 89 94 54 BTRFS error (device loop2): unsupported checksum algorithm 1 BTRFS error (device loop2): superblock checksum mismatch BTRFS error (device loop2): open_ctree failed sd 0:0:1:0: [sg0] tag#7470 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#7470 CDB: Receive copy failure details(LID1) sd 0:0:1:0: [sg0] tag#7470 CDB[00]: 84 04 3d 86 ab 45 ec 52 ab 64 77 a3 43 75 0f 23 sd 0:0:1:0: [sg0] tag#7470 CDB[10]: 89 9b 7d db 29 aa 79 44 5c fe c6 6f 9e e2 70 5f sd 0:0:1:0: [sg0] tag#7470 CDB[20]: 83 0b a0 35 7f bd 52 1c 5d e4 53 59 b8 e1 f2 33 sd 0:0:1:0: [sg0] tag#7470 CDB[30]: 87 d2 6e 65 2b 6d 89 94 54 sd 0:0:1:0: [sg0] tag#7495 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#7495 CDB: Receive copy failure details(LID1) sd 0:0:1:0: [sg0] tag#7495 CDB[00]: 84 04 3d 86 ab 45 ec 52 ab 64 77 a3 43 75 0f 23 sd 0:0:1:0: [sg0] tag#7495 CDB[10]: 89 9b 7d db 29 aa 79 44 5c fe c6 6f 9e e2 70 5f sd 0:0:1:0: [sg0] tag#7495 CDB[20]: 83 0b a0 35 7f bd 52 1c 5d e4 53 59 b8 e1 f2 33 sd 0:0:1:0: [sg0] tag#7495 CDB[30]: 87 d2 6e 65 2b 6d 89 94 54 EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue syz-executor.2 (10278) used greatest stack depth: 24816 bytes left usb usb9: usbfs: interface 0 claimed by hub while 'syz-executor.4' sets config #0 usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.4' sets config #1 input: syz0 as /devices/virtual/input/input5 new mount options do not match the existing superblock, will be ignored input: syz0 as /devices/virtual/input/input6 new mount options do not match the existing superblock, will be ignored hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue input: syz0 as /devices/virtual/input/input7 new mount options do not match the existing superblock, will be ignored overlayfs: unrecognized mount option "xino=auto" or missing value overlayfs: fs on '.' does not support file handles, falling back to index=off. new mount options do not match the existing superblock, will be ignored input: syz0 as /devices/virtual/input/input8 new mount options do not match the existing superblock, will be ignored usb usb9: usbfs: interface 0 claimed by hub while 'syz-executor.4' sets config #0 new mount options do not match the existing superblock, will be ignored EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.4' sets config #1 overlayfs: unrecognized mount option "xino=auto" or missing value overlayfs: fs on '.' does not support file handles, falling back to index=off. overlayfs: unrecognized mount option "xino=auto" or missing value overlayfs: fs on '.' does not support file handles, falling back to index=off. hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected usb usb9: usbfs: interface 0 claimed by hub while 'syz-executor.0' sets config #0 EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue overlayfs: unrecognized mount option "xino=auto" or missing value usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.3' sets config #1 overlayfs: fs on '.' does not support file handles, falling back to index=off. usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.0' sets config #1 overlayfs: unrecognized mount option "xino=auto" or missing value usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.4' sets config #0 overlayfs: fs on '.' does not support file handles, falling back to index=off. usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.1' sets config #0 usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.3' sets config #0 usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.0' sets config #0 usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.4' sets config #1 usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.1' sets config #1 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.3' sets config #1 EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue overlayfs: unrecognized mount option "xino=auto" or missing value usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.0' sets config #1 overlayfs: unrecognized mount option "xino=auto" or missing value overlayfs: fs on '.' does not support file handles, falling back to index=off. usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.4' sets config #1 overlayfs: fs on '.' does not support file handles, falling back to index=off. hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected usb usb9: usbfs: interface 0 claimed by usbfs while 'syz-executor.4' sets config #1 EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue F2FS-fs (loop0): Magic Mismatch, valid(0xf2f52010) - read(0x0) F2FS-fs (loop0): Can't find valid F2FS filesystem in 2th superblock F2FS-fs (loop0): invalid crc value