====================================================== WARNING: possible circular locking dependency detected 4.14.277-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/15432 is trying to acquire lock: (&xt[i].mutex){+.+.}, at: [] target_revfn+0x43/0x210 net/netfilter/x_tables.c:354 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 rollback_registered+0xca/0x170 net/core/dev.c:7253 unregister_netdevice_queue+0x1b4/0x360 net/core/dev.c:8274 EXT4-fs error (device sda1): mb_free_blocks:1464: group 5, unregister_netdevice include/linux/netdevice.h:2444 [inline] unregister_netdev+0x18/0x20 net/core/dev.c:8315 mkiss_close+0xd7/0x1d0 drivers/net/hamradio/mkiss.c:808 tty_ldisc_close+0x8c/0xc0 drivers/tty/tty_ldisc.c:505 tty_ldisc_kill drivers/tty/tty_ldisc.c:651 [inline] tty_ldisc_release+0xe8/0x400 drivers/tty/tty_ldisc.c:818 tty_release_struct+0x20/0xe0 drivers/tty/tty_io.c:1603 tty_release+0xb3f/0x10d0 drivers/tty/tty_io.c:1776 inode 14434: __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 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 -> #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+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 -> #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 block 164960: 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 freeing already freed block (bit 1120); block bitmap corrupt. nfnetlink_rcv_msg+0x9bb/0xc00 net/netfilter/nfnetlink.c:214 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2455 nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515 EXT4-fs error (device sda1): ext4_mb_generate_buddy:754: group 5, 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 block bitmap and bg descriptor inconsistent: 19333 vs 19334 free clusters ___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 EXT4-fs (sda1): pa ffff888074ddd948: logic 0, phys. 164960, len 32 --> &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.5/15432: #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: 15432 Comm: syz-executor.5 Not tainted 4.14.277-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 EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3892: group 5, 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 target_revfn+0x43/0x210 net/netfilter/x_tables.c:354 xt_find_revision+0x15e/0x1d0 net/netfilter/x_tables.c:378 free 16, pa_free 15 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:2455 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: 0033:0x7f406d0950e9 RSP: 002b:00007f406ba0a168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f406d1a7f60 RCX: 00007f406d0950e9 RDX: 0000000000000000 RSI: 0000000020000bc0 RDI: 0000000000000003 RBP: 00007f406d0ef08d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcad94889f R14: 00007f406ba0a300 R15: 0000000000022000 EXT4-fs error (device sda1): mb_free_blocks:1464: group 7, inode 14482: block 229408:freeing already freed block (bit 32); block bitmap corrupt. EXT4-fs error (device sda1): ext4_mb_generate_buddy:754: group 7, block bitmap and bg descriptor inconsistent: 32734 vs 32735 free clusters EXT4-fs (sda1): pa ffff888074ddd798: logic 0, phys. 229408, len 32 EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3892: group 7, free 16, pa_free 15 EXT4-fs error (device sda1): mb_free_blocks:1464: group 9, inode 14485: block 294944:freeing already freed block (bit 32); block bitmap corrupt. EXT4-fs error (device sda1): ext4_mb_generate_buddy:754: group 9, block bitmap and bg descriptor inconsistent: 32734 vs 32735 free clusters EXT4-fs (sda1): pa ffff888074ddd6c0: logic 0, phys. 294944, len 32 EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3892: group 9, free 16, pa_free 15 EXT4-fs error (device sda1): mb_free_blocks:1464: group 11, inode 14461: block 362496:freeing already freed block (bit 2048); block bitmap corrupt. EXT4-fs (sda1): pa ffff8880781ad700: logic 0, phys. 362496, len 32 EXT4-fs (sda1): pa ffff888074f8bb78: logic 0, phys. 428032, len 32 EXT4-fs (sda1): pa ffff888074f8bd28: logic 0, phys. 210976, len 32 EXT4-fs (sda1): pa ffff888074f8be00: logic 0, phys. 210944, len 32 EXT4-fs (sda1): pa ffff888074f8b818: logic 0, phys. 264192, len 32 EXT4-fs (sda1): pa ffff888074f8b308: logic 0, phys. 419840, len 32 EXT4-fs (sda1): pa ffff888074f8b158: logic 0, phys. 523776, len 32 EXT4-fs: 36 callbacks suppressed EXT4-fs (sda1): Delayed block allocation failed for inode 14505 at logical offset 0 with max blocks 17 with error 28 EXT4-fs (sda1): Delayed block allocation failed for inode 14504 at logical offset 1 with max blocks 16 with error 28 EXT4-fs (sda1): Delayed block allocation failed for inode 14503 at logical offset 0 with max blocks 17 with error 28 EXT4-fs (sda1): This should not happen!! Data will be lost EXT4-fs (sda1): This should not happen!! Data will be lost EXT4-fs (sda1): This should not happen!! Data will be lost EXT4-fs (sda1): Total free blocks count 11672 EXT4-fs (sda1): Total free blocks count 27657 EXT4-fs (sda1): Total free blocks count 27657 EXT4-fs (sda1): Free/Dirty block details audit: type=1800 audit(1652013865.183:31): pid=15717 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file0" dev="loop4" ino=29 res=0 audit: type=1800 audit(1652013865.734:32): pid=15778 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="loop5" ino=31 res=0 audit: type=1800 audit(1652013865.774:33): pid=15785 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file0" dev="loop4" ino=32 res=0 Bluetooth: hci1 command 0x0409 tx timeout