====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #292 Not tainted ------------------------------------------------------ syz-executor6/6384 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<000000007e500263>] lock_sock include/net/sock.h:1461 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000007e500263>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1335 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000d5685599>] 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 tee_tg_check+0x1a0/0x280 net/netfilter/xt_TEE.c:106 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_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1335 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1566 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3359 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2937 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 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-executor6/6384: #0: (rtnl_mutex){+.+.}, at: [<00000000d5685599>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 6384 Comm: syz-executor6 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_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1335 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1566 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3359 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2937 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f08eb710c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000014 RBP: 000000000000055e R08: 0000000020745000 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000212 R12: 00000000006f7170 R13: 00000000ffffffff R14: 00007f08eb7116d4 R15: 0000000000000000 ip_tables: iptables: counters copy to user failed while replacing table ip_tables: iptables: counters copy to user failed while replacing table TCP: request_sock_TCP: Possible SYN flooding on port 20030. Sending cookies. Check SNMP counters. QAT: Invalid ioctl QAT: Invalid ioctl device syz2 entered promiscuous mode device eql entered promiscuous mode device eql entered promiscuous mode netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 'syz-executor6': attribute type 5 has an invalid length. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 'syz-executor6': attribute type 5 has an invalid length. QAT: Invalid ioctl QAT: Invalid ioctl netlink: 'syz-executor3': attribute type 1 has an invalid length. openvswitch: netlink: Flow actions attr not present in new flow. openvswitch: netlink: Flow actions attr not present in new flow. SELinux: failed to load policy SELinux: policydb magic number 0x3a58fbeb does not match expected magic number 0xf97cff8c SELinux: failed to load policy NFS: bad mount option value specified: vs SELinux: failed to load policy SELinux: policydb magic number 0x3a58fbeb does not match expected magic number 0xf97cff8c SELinux: failed to load policy NFS: bad mount option value specified: vs PPPIOCDETACH file->f_count=2 PPPIOCDETACH file->f_count=2 device syz6 entered promiscuous mode kauditd_printk_skb: 60 callbacks suppressed audit: type=1400 audit(1517586539.688:141): avc: denied { bind } for pid=7099 comm="syz-executor2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 device eql entered promiscuous mode audit: type=1326 audit(1517586539.927:142): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7171 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0 audit: type=1326 audit(1517586540.011:143): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7171 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0 audit: type=1326 audit(1517586540.089:144): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7219 comm="syz-executor5" exe="/root/syz-executor5" sig=9 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0 audit: type=1326 audit(1517586540.580:145): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7232 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517586540.580:146): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7232 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=149 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517586540.580:147): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7232 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517586540.580:148): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7232 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=321 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517586540.580:149): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7232 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517586540.580:150): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7232 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=64 compat=0 ip=0x453299 code=0x7ffc0000 QAT: Invalid ioctl xt_SECMARK: invalid mode: 0 xt_SECMARK: invalid mode: 0 rfkill: input handler disabled rfkill: input handler enabled SELinux: unrecognized netlink message: protocol=9 nlmsg_type=18 sclass=netlink_audit_socket pig=7555 comm=syz-executor2 *** Guest State *** CR0: actual=0x0000000000000031, shadow=0x0000000060000011, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000242459, shadow=0x0000000000240409, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x0000000000000f80 RIP = 0x0000000000000000 RFLAGS=0x00000002 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000f80 CS:RIP=0030:0000000000002810 CS: sel=0x0030, attr=0x0409b, limit=0x000fffff, base=0x0000000000000000 DS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 SS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 *** Guest State *** ES: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 CR0: actual=0x0000000000000031, shadow=0x0000000060000011, gh_mask=fffffffffffffff7 FS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 CR4: actual=0x0000000000242459, shadow=0x0000000000240409, gh_mask=ffffffffffffe871 GS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 GDTR: limit=0x000007ff, base=0x0000000000001000 LDTR: sel=0x0008, attr=0x04082, limit=0x000007ff, base=0x0000000000001800 CR3 = 0x00000000fffbc000 IDTR: limit=0x000001ff, base=0x0000000000003800 TR: sel=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000 RSP = 0x0000000000000f80 RIP = 0x0000000000000000 RFLAGS=0x00000002 DR7 = 0x0000000000000400 EFER = 0x0000000000000001 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 Sysenter RSP=0000000000000f80 CS:RIP=0030:0000000000002810 *** Host State *** RIP = 0xffffffff811bdff4 RSP = 0xffff8801ca17f508 CS: sel=0x0030, attr=0x0409b, limit=0x000fffff, base=0x0000000000000000 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 DS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 FSBase=00007fd4a0c63700 GSBase=ffff8801db500000 TRBase=fffffe0000034000 GDTBase=fffffe0000032000 IDTBase=fffffe0000000000 SS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 CR0=0000000080050033 CR3=00000001ca230002 CR4=00000000001626e0 ES: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 Sysenter RSP=fffffe0000033200 CS:RIP=0010:ffffffff85a01b70 FS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 EFER = 0x0000000000000d01 PAT = 0x0000000000000000 *** Control State *** GS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 PinBased=0000003f CPUBased=b699edfa SecondaryExec=000000ca EntryControls=0000d1ff ExitControls=0023efff GDTR: limit=0x000007ff, base=0x0000000000001000 ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 LDTR: sel=0x0008, attr=0x04082, limit=0x000007ff, base=0x0000000000001800 VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 IDTR: limit=0x000001ff, base=0x0000000000003800 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffdf6f0ef751 EPT pointer = 0x00000001c40da01e TR: sel=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000 EFER = 0x0000000000000001 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811bdff4 RSP = 0xffff8801d4257508 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007fd4a0c20700 GSBase=ffff8801db400000 TRBase=fffffe0000003000 GDTBase=fffffe0000001000 IDTBase=fffffe0000000000 CR0=0000000080050033 CR3=00000001ca230001 CR4=00000000001626f0 Sysenter RSP=fffffe0000002200 CS:RIP=0010:ffffffff85a01b70 EFER = 0x0000000000000d01 PAT = 0x0000000000000000 *** Control State *** PinBased=0000003f CPUBased=b699edfa SecondaryExec=000000ca EntryControls=0000d1ff ExitControls=0023efff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffdf65220ff6 EPT pointer = 0x00000001b205701e IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 binder: 7842:7853 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 7842:7853 ioctl c0306201 2000a000 returned -11 binder: 7842:7869 Acquire 1 refcount change on invalid ref 0 ret -22 netlink: 204 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 204 bytes leftover after parsing attributes in process `syz-executor2'. syz-executor4 (8035): /proc/8034/oom_adj is deprecated, please use /proc/8034/oom_score_adj instead. kauditd_printk_skb: 51 callbacks suppressed audit: type=1400 audit(1517586545.084:202): avc: denied { shutdown } for pid=8050 comm="syz-executor6" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 *** Guest State *** CR0: actual=0x0000000000000030, shadow=0x0000000060000010, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002050, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x0000000000000000 RIP = 0x000000000000fff0 RFLAGS=0x00000002 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 CS: sel=0xf000, attr=0x0009b, limit=0x0000ffff, base=0x00000000ffff0000 DS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 SS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 ES: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 FS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 GS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 GDTR: limit=0x0000ffff, base=0x0000000000000000 LDTR: sel=0x0000, attr=0x00082, limit=0x0000ffff, base=0x0000000000000000 IDTR: limit=0x0000ffff, base=0x0000000000000000 TR: sel=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000 EFER = 0x0000000000000000 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 Interruptibility = 00000001 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811bdff4 RSP = 0xffff8801ccc0f508 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007fb946362700 GSBase=ffff8801db400000 TRBase=fffffe0000003000 GDTBase=fffffe0000001000 IDTBase=fffffe0000000000 CR0=0000000080050033 CR3=00000001c735e005 CR4=00000000001626f0 Sysenter RSP=fffffe0000002200 CS:RIP=0010:ffffffff85a01b70 EFER = 0x0000000000000d01 PAT = 0x0000000000000000 *** Control State *** PinBased=0000003f CPUBased=b699edfe SecondaryExec=000000c2 EntryControls=0000d1ff ExitControls=0023efff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffdde520b627 EPT pointer = 0x00000001d729901e audit: type=1326 audit(1517586546.395:203): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8276 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0 QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1326 audit(1517586546.492:204): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8276 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x0 audit: type=1326 audit(1517586546.549:205): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8315 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517586546.553:206): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8315 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=257 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517586546.554:207): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8315 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517586546.554:208): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8315 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517586546.556:209): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8315 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=16 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517586546.556:210): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8315 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000