FAT-fs (loop3): Unrecognized mount option "" or missing value ====================================================== WARNING: possible circular locking dependency detected 4.14.228-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/7996 is trying to acquire lock: (&table[i].mutex){+.+.}, at: [] ip_set_nfnl_put+0x11a/0x310 net/netfilter/ipset/ip_set_core.c:732 but task is already holding lock: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1094 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #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:2433 nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878 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 ip_set_nfnl_put+0x11a/0x310 net/netfilter/ipset/ip_set_core.c:732 set_target_v1_destroy+0xd7/0x150 net/netfilter/xt_set.c:392 cleanup_entry+0x232/0x310 net/ipv6/netfilter/ip6_tables.c:684 __do_replace+0x38d/0x580 net/ipv6/netfilter/ip6_tables.c:1105 do_replace net/ipv6/netfilter/ip6_tables.c:1161 [inline] do_ip6t_set_ctl+0x256/0x3b0 net/ipv6/netfilter/ip6_tables.c:1685 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:2828 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 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&xt[i].mutex); lock(&table[i].mutex); lock(&xt[i].mutex); lock(&table[i].mutex); *** DEADLOCK *** 1 lock held by syz-executor.0/7996: #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1094 stack backtrace: CPU: 0 PID: 7996 Comm: syz-executor.0 Not tainted 4.14.228-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 ip_set_nfnl_put+0x11a/0x310 net/netfilter/ipset/ip_set_core.c:732 set_target_v1_destroy+0xd7/0x150 net/netfilter/xt_set.c:392 cleanup_entry+0x232/0x310 net/ipv6/netfilter/ip6_tables.c:684 __do_replace+0x38d/0x580 net/ipv6/netfilter/ip6_tables.c:1105 do_replace net/ipv6/netfilter/ip6_tables.c:1161 [inline] do_ip6t_set_ctl+0x256/0x3b0 net/ipv6/netfilter/ip6_tables.c:1685 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:2828 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 RIP: 0033:0x467a9a RSP: 002b:00007fff2d0c9c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 0000000000467a9a RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 00007fff2d0c9c30 R08: 00000000000002e8 R09: 0079746972756365 R10: 0000000000542fe0 R11: 0000000000000206 R12: 00007fff2d0c9c90 R13: 0000000000000003 R14: 00007fff2d0c9c2c R15: 0000000000542f80 Bluetooth: hci4 command 0x040f tx timeout print_req_error: 3 callbacks suppressed print_req_error: I/O error, dev loop3, sector 0 device vxlan0 entered promiscuous mode kauditd_printk_skb: 7 callbacks suppressed audit: type=1800 audit(1617682238.877:26): pid=12676 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14196 res=0 device vxlan0 entered promiscuous mode audit: type=1800 audit(1617682238.997:27): pid=12676 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="bus" dev="sda1" ino=14196 res=0 IPVS: set_ctl: invalid protocol: 0 224.0.0.2:20004 IPVS: set_ctl: invalid protocol: 0 224.0.0.2:20004 9pnet: Insufficient options for proto=fd 9pnet: Insufficient options for proto=fd bond0: @ is up - this may be due to an out of date ifenslave bridge0: port 3(@) entered blocking state bridge0: port 3(@) entered disabled state device @ entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode befs: (nbd3): No write support. Marking filesystem read-only bridge0: port 3(@) entered blocking state bridge0: port 3(@) entered forwarding state block nbd3: Attempted send on invalid socket print_req_error: I/O error, dev nbd3, sector 0 befs: (nbd3): unable to read superblock overlayfs: unrecognized mount option "%upperdir=./file0GqW{@Yh$@!`?+>lzKhws(H" or missing value device @ left promiscuous mode befs: (nbd3): No write support. Marking filesystem read-only block nbd3: Attempted send on invalid socket print_req_error: I/O error, dev nbd3, sector 0 befs: (nbd3): unable to read superblock device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode bridge0: port 3(@) entered disabled state bond0: @ is up - this may be due to an out of date ifenslave bridge0: port 3(@) entered blocking state bridge0: port 3(@) entered disabled state device @ entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode bridge0: port 3(@) entered blocking state bridge0: port 3(@) entered forwarding state device @ left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode bridge0: port 3(@) entered disabled state squashfs: SQUASHFS error: Major/Minor mismatch, trying to mount newer 22.0 filesystem bond0: @ is up - this may be due to an out of date ifenslave squashfs: SQUASHFS error: Please update your kernel bridge0: port 3(@) entered blocking state bridge0: port 3(@) entered disabled state squashfs: SQUASHFS error: Major/Minor mismatch, trying to mount newer 22.0 filesystem device @ entered promiscuous mode squashfs: SQUASHFS error: Please update your kernel device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode bridge0: port 3(@) entered blocking state bridge0: port 3(@) entered forwarding state overlayfs: unrecognized mount option "%upperdir=./file0GqW{@Yh$@!`?+>lzKhws(H" or missing value Bluetooth: hci4 command 0x0419 tx timeout ldm_validate_privheads(): Disk read failed. loop3: p2 < > loop3: partition table partially beyond EOD, truncated affs: Unrecognized mount option "{%\)-{*" or missing value affs: Error parsing options libceph: resolve 'du' (ret=-3): failed libceph: parse_ips bad ip '[du:y::zn}' EXT4-fs (loop4): VFS: Can't find ext4 filesystem overlayfs: missing 'lowerdir' overlayfs: missing 'lowerdir' EXT4-fs (loop4): VFS: Can't find ext4 filesystem syz-executor.5 uses obsolete (PF_INET,SOCK_PACKET) device syzkaller1 entered promiscuous mode device syzkaller1 entered promiscuous mode bond0: macsec0 is up - this may be due to an out of date ifenslave bond0: macsec0 is up - this may be due to an out of date ifenslave audit: type=1800 audit(1617682245.427:28): pid=13336 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="bus" dev="sda1" ino=14241 res=0 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. audit: type=1800 audit(1617682246.197:29): pid=13385 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="bus" dev="sda1" ino=14241 res=0 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. tmpfs: No value for mount option 'p0000' tmpfs: No value for mount option 'p0000' xt_connbytes: cannot load conntrack support for proto=2 xt_connbytes: Forcing CT accounting to be enabled netlink: 40 bytes leftover after parsing attributes in process `syz-executor.4'. xt_connbytes: cannot load conntrack support for proto=2 block nbd0: not configured, cannot reconfigure netlink: 40 bytes leftover after parsing attributes in process `syz-executor.4'. block nbd0: not configured, cannot reconfigure IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready