====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #292 Not tainted ------------------------------------------------------ syz-executor3/5595 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<00000000aa3908f5>] lock_sock include/net/sock.h:1461 [inline] (sk_lock-AF_INET){+.+.}, at: [<00000000aa3908f5>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000004df85669>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (rtnl_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 register_netdevice_notifier+0xad/0x860 net/core/dev.c:1607 clusterip_config_init net/ipv4/netfilter/ipt_CLUSTERIP.c:261 [inline] clusterip_tg_check+0xeb9/0x1570 net/ipv4/netfilter/ipt_CLUSTERIP.c:478 xt_check_target+0x22c/0x7d0 net/netfilter/x_tables.c:845 check_target net/ipv4/netfilter/ip_tables.c:513 [inline] find_check_entry.isra.8+0x8c8/0xcb0 net/ipv4/netfilter/ip_tables.c:554 translate_table+0xed1/0x1610 net/ipv4/netfilter/ip_tables.c:725 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline] do_ipt_set_ctl+0x370/0x5f0 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0xa1/0xb0 net/ipv4/ip_sockglue.c:1260 sctp_setsockopt+0x2b6/0x61d0 net/sctp/socket.c:4104 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #0 (sk_lock-AF_INET){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 lock_sock_nested+0xc2/0x110 net/core/sock.c:2780 lock_sock include/net/sock.h:1461 [inline] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1252 tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2905 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); *** DEADLOCK *** 1 lock held by syz-executor3/5595: #0: (rtnl_mutex){+.+.}, at: [<000000004df85669>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5595 Comm: syz-executor3 Not tainted 4.15.0+ #292 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+0x194/0x257 lib/dump_stack.c:53 print_circular_bug.isra.38+0x2cd/0x2dc kernel/locking/lockdep.c:1223 check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2417 [inline] __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3431 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 lock_sock_nested+0xc2/0x110 net/core/sock.c:2780 lock_sock include/net/sock.h:1461 [inline] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1252 tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2905 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fbf1f0cec58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000030 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00000000000005c9 R08: 0000000000000098 R09: 0000000000000000 R10: 0000000020123a18 R11: 0000000000000212 R12: 00000000006f7b78 R13: 00000000ffffffff R14: 00007fbf1f0cf6d4 R15: 0000000000000000 sit: non-ECT from 0.0.0.0 with TOS=0x3 sit: non-ECT from 0.0.0.0 with TOS=0x3 binder: 5653 RLIMIT_NICE not set binder: 5653 RLIMIT_NICE not set binder: release 5651:5653 transaction 8 out, still active binder: release 5651:5653 transaction 7 in, still active binder: undelivered TRANSACTION_COMPLETE binder: release 5651:5667 transaction 7 out, still active binder: 5667 RLIMIT_NICE not set binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 8, target dead binder: send failed reply for transaction 7, target dead binder: release 5651:5653 transaction 10 out, still active binder: undelivered TRANSACTION_COMPLETE binder: release 5651:5667 transaction 11 out, still active binder: undelivered TRANSACTION_COMPLETE Unknown options in mask 4 binder: send failed reply for transaction 10, target dead binder: send failed reply for transaction 11, target dead Unknown options in mask 4 QAT: Invalid ioctl QAT: Invalid ioctl SELinux: policydb version 680972831 does not match my version range 15-31 SELinux: failed to load policy SELinux: policydb version 680972831 does not match my version range 15-31 SELinux: failed to load policy xt_CT: You must specify a L4 protocol, and not use inversions on it. device eql entered promiscuous mode netlink: 'syz-executor3': attribute type 3 has an invalid length. device eql entered promiscuous mode netlink: 'syz-executor3': attribute type 3 has an invalid length. device eql entered promiscuous mode capability: warning: `syz-executor3' uses deprecated v2 capabilities in a way that may be insecure kauditd_printk_skb: 25 callbacks suppressed audit: type=1400 audit(1517576498.779:55): avc: denied { ipc_lock } for pid=6229 comm="syz-executor6" capability=14 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1326 audit(1517576498.920:56): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6249 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517576498.948:57): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6249 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=17 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517576498.948:58): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6249 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517576498.949:59): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6249 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=9 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517576498.951:60): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6249 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517576498.952:61): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6249 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=41 compat=0 ip=0x453299 code=0x7ffc0000 tmpfs: No value for mount option '±' audit: type=1326 audit(1517576498.953:62): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6249 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517576498.953:63): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6249 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517576498.954:64): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=6249 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 tmpfs: No value for mount option '±' netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 'syz-executor6': attribute type 21 has an invalid length. netlink: 'syz-executor6': attribute type 21 has an invalid length. encrypted_key: insufficient parameters specified encrypted_key: insufficient parameters specified syz-executor2 (6900) used greatest stack depth: 16672 bytes left Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable 8021q: VLANs not supported on lo 8021q: VLANs not supported on lo ptrace attach of "/root/syz-executor3"[4091] was attempted by "/root/syz-executor3"[7302] ptrace attach of "/root/syz-executor3"[4091] was attempted by "/root/syz-executor3"[7305] binder: 7325 RLIMIT_NICE not set binder: 7325 RLIMIT_NICE not set binder: 7319:7325 BC_DEAD_BINDER_DONE 0000000000000003 not found binder: 7325 RLIMIT_NICE not set binder: 7319:7362 BC_DEAD_BINDER_DONE 0000000000000003 not found binder: undelivered death notification, 0000000000000000 binder: undelivered death notification, 0000000000000000 mmap: syz-executor4 (7393) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. kauditd_printk_skb: 292 callbacks suppressed audit: type=1400 audit(1517576503.783:357): avc: denied { net_raw } for pid=7670 comm="syz-executor1" capability=13 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517576503.789:358): avc: denied { net_admin } for pid=4086 comm="syz-executor7" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517576503.789:359): avc: denied { net_admin } for pid=4086 comm="syz-executor7" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 xt_limit: Overflow, try lower: 4294967293/4294962286 audit: type=1400 audit(1517576503.870:360): avc: denied { net_admin } for pid=4085 comm="syz-executor6" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517576503.876:361): avc: denied { net_admin } for pid=4085 comm="syz-executor6" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517576503.882:362): avc: denied { net_admin } for pid=4088 comm="syz-executor2" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517576503.896:363): avc: denied { net_admin } for pid=4084 comm="syz-executor1" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517576503.902:364): avc: denied { net_admin } for pid=4090 comm="syz-executor4" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517576503.903:365): avc: denied { net_admin } for pid=4090 comm="syz-executor4" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517576503.909:366): avc: denied { map_create } for pid=7703 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 binder: BINDER_SET_CONTEXT_MGR already set binder: 7809:7832 ioctl 40046207 0 returned -16 binder: 7809:7839 Release 1 refcount change on invalid ref 0 ret -22