====================================================== WARNING: possible circular locking dependency detected 4.14.282-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/14454 is trying to acquire lock: (&xt[i].mutex){+.+.}, at: [] match_revfn+0x43/0x210 net/netfilter/x_tables.c:332 but task is already holding lock: (&table[i].mutex){+.+.}, at: [] nfnl_lock net/netfilter/nfnetlink.c:61 [inline] (&table[i].mutex){+.+.}, at: [] nfnetlink_rcv_msg+0x726/0xc00 net/netfilter/nfnetlink.c:209 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&table[i].mutex){+.+.}: __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+0x765/0xbb0 net/core/dev.c:7211 unregister_netdevice_many.part.0+0x18/0x2e0 net/core/dev.c:8293 unregister_netdevice_many+0x36/0x50 net/core/dev.c:8292 EXT4-fs (loop3): Test dummy encryption mount option ignored rtnl_newlink+0x13fd/0x1830 net/core/rtnetlink.c:2773 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2454 netlink_unicast_kernel net/netlink/af_netlink.c:1296 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1322 netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1893 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x326/0x800 net/socket.c:2062 __sys_sendmmsg+0x129/0x330 net/socket.c:2152 SYSC_sendmmsg net/socket.c:2183 [inline] SyS_sendmmsg+0x2f/0x50 net/socket.c:2178 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #1 (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+0x232/0x310 net/ipv6/netfilter/ip6_tables.c:685 __do_replace+0x38d/0x580 net/ipv6/netfilter/ip6_tables.c:1106 do_replace net/ipv6/netfilter/ip6_tables.c:1162 [inline] do_ip6t_set_ctl+0x256/0x3b0 net/ipv6/netfilter/ip6_tables.c:1688 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x5f/0xb0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0xc0/0x120 net/ipv6/ipv6_sockglue.c:937 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 -> #0 (&xt[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 match_revfn+0x43/0x210 net/netfilter/x_tables.c:332 xt_find_revision+0x8d/0x1d0 net/netfilter/x_tables.c:380 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:2454 nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515 netlink_unicast_kernel net/netlink/af_netlink.c:1296 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1322 netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1893 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 other info that might help us debug this: Chain exists of: &xt[i].mutex --> rtnl_mutex --> &table[i].mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&table[i].mutex); lock(rtnl_mutex); lock(&table[i].mutex); lock(&xt[i].mutex); *** DEADLOCK *** 1 lock held by syz-executor.5/14454: #0: (&table[i].mutex){+.+.}, at: [] nfnl_lock net/netfilter/nfnetlink.c:61 [inline] #0: (&table[i].mutex){+.+.}, at: [] nfnetlink_rcv_msg+0x726/0xc00 net/netfilter/nfnetlink.c:209 stack backtrace: CPU: 0 PID: 14454 Comm: syz-executor.5 Not tainted 4.14.282-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 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 match_revfn+0x43/0x210 net/netfilter/x_tables.c:332 xt_find_revision+0x8d/0x1d0 net/netfilter/x_tables.c:380 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:2454 nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515 netlink_unicast_kernel net/netlink/af_netlink.c:1296 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1322 netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1893 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 RIP: 0033:0x7f532708e109 RSP: 002b:00007f5325a03168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f53271a0f60 RCX: 00007f532708e109 RDX: 0000000000000000 RSI: 0000000020000380 RDI: 0000000000000003 RBP: 00007f53270e80ad R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff80c0a6af R14: 00007f5325a03300 R15: 0000000000022000 EXT4-fs (loop4): Test dummy encryption mount option ignored EXT4-fs (loop0): bad s_want_extra_isize: 19067 EXT4-fs (loop3): mounted filesystem without journal. Opts: journal_dev=0x0000000000000a17,max_dir_size_kb=0x0000000000000000,test_dummy_encryption,,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: journal_dev=0x0000000000000a17,max_dir_size_kb=0x0000000000000000,test_dummy_encryption,,errors=continue EXT4-fs (loop0): bad s_want_extra_isize: 19067 EXT4-fs (loop3): Test dummy encryption mount option ignored EXT4-fs (loop4): Test dummy encryption mount option ignored EXT4-fs (loop3): mounted filesystem without journal. Opts: journal_dev=0x0000000000000a17,max_dir_size_kb=0x0000000000000000,test_dummy_encryption,,errors=continue EXT4-fs (loop4): mounted filesystem without journal. Opts: journal_dev=0x0000000000000a17,max_dir_size_kb=0x0000000000000000,test_dummy_encryption,,errors=continue EXT4-fs (loop0): bad s_want_extra_isize: 19067 EXT4-fs (loop3): Test dummy encryption mount option ignored EXT4-fs (loop0): bad s_want_extra_isize: 19067 EXT4-fs (loop3): mounted filesystem without journal. Opts: journal_dev=0x0000000000000a17,max_dir_size_kb=0x0000000000000000,test_dummy_encryption,,errors=continue EXT4-fs (loop4): Test dummy encryption mount option ignored print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read EXT4-fs (loop4): mounted filesystem without journal. Opts: journal_dev=0x0000000000000a17,max_dir_size_kb=0x0000000000000000,test_dummy_encryption,,errors=continue print_req_error: I/O error, dev loop0, sector 0 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.4'. (syz-executor.3,14954,0):ocfs2_parse_options:1498 ERROR: Invalid heartbeat mount options (syz-executor.3,14954,0):ocfs2_fill_super:1217 ERROR: status = -22 (syz-executor.3,14971,0):ocfs2_parse_options:1498 ERROR: Invalid heartbeat mount options (syz-executor.3,14971,0):ocfs2_fill_super:1217 ERROR: status = -22 (syz-executor.3,15004,0):ocfs2_parse_options:1498 ERROR: Invalid heartbeat mount options (syz-executor.3,15004,0):ocfs2_fill_super:1217 ERROR: status = -22 (syz-executor.3,15023,0):ocfs2_parse_options:1498 ERROR: Invalid heartbeat mount options (syz-executor.3,15023,0):ocfs2_fill_super:1217 ERROR: status = -22 audit: type=1800 audit(1655140498.931:142): pid=15224 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file0" dev="sda1" ino=14541 res=0 audit: type=1804 audit(1655140498.931:143): pid=15224 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir4266521470/syzkaller.mkl3Dt/213/file0" dev="sda1" ino=14541 res=1 audit: type=1800 audit(1655140499.781:144): pid=15318 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file0" dev="sda1" ino=14161 res=0 Bluetooth: hci1 command 0x0406 tx timeout audit: type=1804 audit(1655140499.791:145): pid=15318 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir4266521470/syzkaller.mkl3Dt/214/file0" dev="sda1" ino=14161 res=1 Bluetooth: hci5 command 0x0406 tx timeout Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci0 command 0x0406 tx timeout audit: type=1800 audit(1655140500.361:146): pid=15332 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=14019 res=0 Bluetooth: hci4 command 0x0406 tx timeout audit: type=1800 audit(1655140500.561:147): pid=15333 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="file0" dev="sda1" ino=14034 res=0 audit: type=1804 audit(1655140500.611:148): pid=15332 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir4140518813/syzkaller.NRGKK0/224/file0" dev="sda1" ino=14019 res=1