====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #290 Not tainted ------------------------------------------------------ syz-executor6/19346 is trying to acquire lock: (rtnl_mutex){+.+.}, at: [<00000000e98a71d4>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 but task is already holding lock: (sk_lock-AF_INET){+.+.}, at: [<000000002138c7ac>] lock_sock include/net/sock.h:1461 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000002138c7ac>] ip_setsockopt+0x8c/0xb0 net/ipv4/ip_sockglue.c:1259 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sk_lock-AF_INET){+.+.}: 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 sctp_getsockopt+0x450/0x735a net/sctp/socket.c:7087 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 -> #0 (rtnl_mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 __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 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 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(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(rtnl_mutex); *** DEADLOCK *** 1 lock held by syz-executor6/19346: #0: (sk_lock-AF_INET){+.+.}, at: [<000000002138c7ac>] lock_sock include/net/sock.h:1461 [inline] #0: (sk_lock-AF_INET){+.+.}, at: [<000000002138c7ac>] ip_setsockopt+0x8c/0xb0 net/ipv4/ip_sockglue.c:1259 stack backtrace: CPU: 0 PID: 19346 Comm: syz-executor6 Not tainted 4.15.0+ #290 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 __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 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 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:00007efe0adbfc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00000000000005c4 R08: 00000000000002e0 R09: 0000000000000000 R10: 000000002002ccf8 R11: 0000000000000212 R12: 00000000006f7b00 R13: 00000000ffffffff R14: 00007efe0adc06d4 R15: 0000000000000000 atomic_op 000000002adf9aff conn xmit_atomic (null) atomic_op 000000003421d388 conn xmit_atomic (null) device eql entered promiscuous mode x_tables: ip6_tables: .0 target: invalid size 8 (kernel) != (user) 3 x_tables: ip6_tables: .0 target: invalid size 8 (kernel) != (user) 3 binder: 19679 RLIMIT_NICE not set binder: 19679 RLIMIT_NICE not set binder: 19671:19690 BC_FREE_BUFFER u000000002000c000 matched unreturned buffer binder: BINDER_SET_CONTEXT_MGR already set binder: 19671:19690 ioctl 40046207 0 returned -16 binder_alloc: 19671: binder_alloc_buf, no vma binder: 19671:19690 transaction failed 29189/-3, size 0-0 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 19671:19679 transaction 77 in, still active binder: send failed reply for transaction 77 to 19671:19690 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 kauditd_printk_skb: 37 callbacks suppressed audit: type=1326 audit(1517488706.538:1038): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=19714 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 sctp: [Deprecated]: syz-executor4 (pid 19722) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor4 (pid 19722) Use of int in maxseg socket option. Use struct sctp_assoc_value instead audit: type=1326 audit(1517488706.538:1039): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=19714 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=126 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517488706.538:1040): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=19714 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517488706.539:1041): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=19714 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=111 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517488706.539:1042): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=19714 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517488706.540:1043): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=19714 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=143 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517488706.540:1044): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=19714 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517488706.542:1045): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=19714 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=203 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517488706.542:1046): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=19714 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517488706.569:1047): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=19714 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=9 compat=0 ip=0x453299 code=0x7ffc0000 binder: BINDER_SET_CONTEXT_MGR already set binder: 19812:19818 ioctl 40046207 0 returned -16 binder: 19812:19818 IncRefs 0 refcount change on invalid ref 2 ret -22 binder_alloc: 19812: binder_alloc_buf, no vma binder: 19812:19814 transaction failed 29189/-3, size 80-16 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 19812:19814 transaction 80 out, still active binder: unexpected work type, 4, not freed binder: unexpected work type, 4, not freed binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 80, target dead atomic_op 00000000511c6891 conn xmit_atomic (null) QAT: Invalid ioctl QAT: Invalid ioctl device eql entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! sock: sock_set_timeout: `syz-executor3' (pid 20575) tries to set negative timeout sock: sock_set_timeout: `syz-executor3' (pid 20582) tries to set negative timeout kauditd_printk_skb: 62 callbacks suppressed audit: type=1400 audit(1517488711.635:1110): avc: denied { map } for pid=20592 comm="syz-executor4" path="/dev/dsp7" dev="devtmpfs" ino=48601 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:device_t:s0 tclass=file permissive=1 *** Guest State *** CR0: actual=0xffffffff9ffffffc, shadow=0xfffffffffffffffc, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002060, shadow=0x0000000000000020, gh_mask=ffffffffffffe871 CR3 = 0x0000000000000000 PDPTR0 = 0x0200000000000003 PDPTR1 = 0x0000000000000000 PDPTR2 = 0x0000000000000000 PDPTR3 = 0x0000000000000000 RSP = 0x0000000000000000 RIP = 0x0000000000008000 RFLAGS=0x00010002 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 CS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 DS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 SS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 ES: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 FS: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 GS: sel=0x0009, attr=0x10000, limit=0x00000000, base=0x0000000000000000 GDTR: limit=0x00000000, base=0x0000000000000000 LDTR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 IDTR: limit=0x00000000, base=0x0000000000000000 TR: sel=0x0000, attr=0x10000, limit=0x00000000, base=0x0000000000000000 EFER = 0x0000000000000000 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 Interruptibility = 00000008 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811bdff4 RSP = 0xffff8801c39bf508 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f4cdadbd700 GSBase=ffff8801db400000 TRBase=fffffe0000034000 GDTBase=fffffe0000032000 IDTBase=fffffe0000000000 CR0=0000000080050033 CR3=00000001bf8ae004 CR4=00000000001626f0 Sysenter RSP=fffffe0000033200 CS:RIP=0010:ffffffff85a01b70 EFER = 0x0000000000000d01 PAT = 0x0000000000000000 *** Control State *** PinBased=0000003f CPUBased=b6986dfa SecondaryExec=000000c2 EntryControls=0000d1ff ExitControls=0023efff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=80000306 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000003 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffb5956f831d EPT pointer = 0x00000001c53ac01e audit: type=1326 audit(1517488714.300:1111): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=20792 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517488714.331:1112): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=20792 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=290 compat=0 ip=0x453299 code=0x7ffc0000