gre0: Master is either lo or non-ether device netlink: 64 bytes leftover after parsing attributes in process `syz-executor.2'. gre0: Master is either lo or non-ether device netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'. ====================================================== WARNING: possible circular locking dependency detected 4.14.228-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/23462 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 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: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 cleanup_match net/ipv4/netfilter/ip_tables.c:473 [inline] cleanup_entry+0x117/0x2d0 net/ipv4/netfilter/ip_tables.c:658 __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:1674 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: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.2/23462: #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1094 stack backtrace: CPU: 0 PID: 23462 Comm: syz-executor.2 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 cleanup_match net/ipv4/netfilter/ip_tables.c:473 [inline] cleanup_entry+0x117/0x2d0 net/ipv4/netfilter/ip_tables.c:658 __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:1674 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: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: 0033:0x466459 RSP: 002b:00007f72009ac188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000466459 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004bf9fb R08: 0000000000000358 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffd1038f8cf R14: 00007f72009ac300 R15: 0000000000022000 gre0: Master is either lo or non-ether device netlink: 64 bytes leftover after parsing attributes in process `syz-executor.2'. ip_tables: iptables: counters copy to user failed while replacing table Cannot find del_set index 2 as target Cannot find del_set index 2 as target --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: osf match: only valid for protocol 6 x_tables: ip_tables: osf match: only valid for protocol 6 x_tables: ip_tables: sctp match: only valid for protocol 132 --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table caif:caif_disconnect_client(): nothing to disconnect --map-set only usable from mangle table caif:caif_disconnect_client(): nothing to disconnect x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table x_tables: ip_tables: icmp match: only valid for protocol 1 --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: socket match: used from hooks OUTPUT, but only valid from PREROUTING/INPUT --map-set only usable from mangle table x_tables: ip_tables: icmp match: only valid for protocol 1 x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: socket match: used from hooks OUTPUT, but only valid from PREROUTING/INPUT --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 gre0: Master is either lo or non-ether device --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table --map-set only usable from mangle table gre0: Master is either lo or non-ether device --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 gre0: Master is either lo or non-ether device x_tables: ip_tables: rpfilter match: used from hooks PREROUTING/INPUT, but only valid from PREROUTING x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! gre0: Master is either lo or non-ether device --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 nla_parse: 30 callbacks suppressed netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 44 bytes leftover after parsing attributes in process `syz-executor.5'. x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 44 bytes leftover after parsing attributes in process `syz-executor.5'. --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. x_tables: ip_tables: osf match: only valid for protocol 6 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'. Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.5'. x_tables: ip_tables: udplite match: only valid for protocol 136 x_tables: ip_tables: udplite match: only valid for protocol 136 x_tables: ip_tables: udplite match: only valid for protocol 136 x_tables: ip_tables: udplite match: only valid for protocol 136 x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! befs: Unrecognized mount option "[[\}" or missing value befs: (loop4): cannot parse mount options befs: Unrecognized mount option "[[\}" or missing value befs: (loop4): cannot parse mount options Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 4 Buffer I/O error on dev loop4, logical block 2, async page read print_req_error: I/O error, dev loop4, sector 6 Buffer I/O error on dev loop4, logical block 3, async page read gfs2: gfs2 mount does not exist x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 4 Buffer I/O error on dev loop4, logical block 2, async page read print_req_error: I/O error, dev loop4, sector 6 Buffer I/O error on dev loop4, logical block 3, async page read x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! gre0: Master is either lo or non-ether device x_tables: ip_tables: udplite match: only valid for protocol 136 gre0: Master is either lo or non-ether device Can't find ip_set type hash:let,net --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! x_tables: ip_tables: ah match: only valid for protocol 51 --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 x_tables: ip_tables: ah match: only valid for protocol 51 Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table hpfs: bad mount options. x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! hpfs: bad mount options. Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 --map-set only usable from mangle table --map-set only usable from mangle table ip_tables: iptables: counters copy to user failed while replacing table x_tables: ip_tables: udplite match: only valid for protocol 136 x_tables: ip_tables: udplite match: only valid for protocol 136 ip_tables: iptables: counters copy to user failed while replacing table Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 ip_tables: iptables: counters copy to user failed while replacing table nla_parse: 48 callbacks suppressed netlink: 68 bytes leftover after parsing attributes in process `syz-executor.4'. Protocol error: SET target dimension is over the limit! netlink: 68 bytes leftover after parsing attributes in process `syz-executor.4'. --map-set only usable from mangle table Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136 Protocol error: SET target dimension is over the limit! x_tables: ip_tables: udplite match: only valid for protocol 136