capability: warning: `syz-executor6' uses 32-bit capabilities (legacy support in use) audit: type=1400 audit(1519417893.368:20): avc: denied { map } for pid=5729 comm="syz-executor3" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=15477 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 ====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc2+ #325 Not tainted ------------------------------------------------------ syz-executor1/5755 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<0000000086f74dfd>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000086f74dfd>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000006cd5f70f>] 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: -> #2 (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 unregister_netdevice_notifier+0x91/0x4e0 net/core/dev.c:1673 tee_tg_destroy+0x61/0xc0 net/netfilter/xt_TEE.c:123 cleanup_entry+0x242/0x380 net/ipv6/netfilter/ip6_tables.c:673 __do_replace+0x7ac/0xa70 net/ipv6/netfilter/ip6_tables.c:1108 do_replace net/ipv6/netfilter/ip6_tables.c:1164 [inline] do_ip6t_set_ctl+0x40f/0x5f0 net/ipv6/netfilter/ip6_tables.c:1686 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x10b/0x130 net/ipv6/ipv6_sockglue.c:927 dccp_setsockopt+0x85/0xd0 net/dccp/proto.c:576 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #1 (&xt[i].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 xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1046 xt_request_find_table_lock+0x28/0xc0 net/netfilter/x_tables.c:1093 get_info+0x154/0x690 net/ipv6/netfilter/ip6_tables.c:989 do_arpt_get_ctl+0x2a9/0xa00 net/ipv4/netfilter/arp_tables.c:1481 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122 ip_getsockopt+0x15c/0x220 net/ipv4/ip_sockglue.c:1571 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3359 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2934 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #0 (sk_lock-AF_INET){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 lock_sock_nested+0xc2/0x110 net/core/sock.c:2777 lock_sock include/net/sock.h:1463 [inline] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1560 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3359 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2934 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 other info that might help us debug this: Chain exists of: sk_lock-AF_INET --> &xt[i].mutex --> rtnl_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(&xt[i].mutex); lock(rtnl_mutex); lock(sk_lock-AF_INET); *** DEADLOCK *** 1 lock held by syz-executor1/5755: #0: (rtnl_mutex){+.+.}, at: [<000000006cd5f70f>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5755 Comm: syz-executor1 Not tainted 4.16.0-rc2+ #325 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+0x194/0x24d 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:2777 lock_sock include/net/sock.h:1463 [inline] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1560 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3359 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2934 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453de9 RSP: 002b:00007fd20d329c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007fd20d32a6d4 RCX: 0000000000453de9 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000020005ffc R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000f2 R14: 00000000006f1750 R15: 0000000000000000 audit: type=1400 audit(1519417894.204:21): avc: denied { set_context_mgr } for pid=5781 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=binder permissive=1 binder: 5784 RLIMIT_NICE not set binder: 5781:5791 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 binder: BINDER_SET_CONTEXT_MGR already set binder: 5781:5793 ioctl 40046207 0 returned -16 binder: 5791 RLIMIT_NICE not set binder: 5781:5793 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=46411 sclass=netlink_route_socket pig=5923 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=46411 sclass=netlink_route_socket pig=5923 comm=syz-executor7 binder: 5936:5941 ioctl c0306201 20019fd0 returned -14 binder: 5936:5941 ioctl c0306201 20019fd0 returned -14 kernel msg: ebtables bug: please report to author: EBT_ENTRY_OR_ENTRIES shouldn't be set in distinguisher SELinux: unrecognized netlink message: protocol=4 nlmsg_type=86 sclass=netlink_tcpdiag_socket pig=6355 comm=syz-executor7 Cannot find add_set index 0 as target SELinux: unrecognized netlink message: protocol=4 nlmsg_type=86 sclass=netlink_tcpdiag_socket pig=6367 comm=syz-executor7 Cannot find add_set index 0 as target *** Guest State *** CR0: actual=0x0000000000000031, shadow=0x0000000060000011, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002050, shadow=0x0000000000000020, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x0000000000000f80 RIP = 0x0000000000000000 RFLAGS=0x00000002 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000f80 CS:RIP=0050:0000000000002810 CS: sel=0x0010, attr=0x0009b, limit=0x000fffff, base=0x0000000000000000 DS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 SS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 ES: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 FS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 GS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 GDTR: limit=0x000007ff, base=0x0000000000001000 LDTR: sel=0x0008, attr=0x04082, limit=0x000007ff, base=0x0000000000001800 IDTR: limit=0x000001ff, base=0x0000000000003800 TR: sel=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000 EFER = 0x0000000000008001 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 Interruptibility = 00000008 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811cd945 RSP = 0xffff8801d79b73b8 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007fd20d32a700 GSBase=ffff8801db200000 TRBase=fffffe0000003000 GDTBase=fffffe0000001000 IDTBase=fffffe0000000000 CR0=0000000080050033 CR3=00000001bd8ff004 CR4=00000000001626f0 Sysenter RSP=fffffe0000002200 CS:RIP=0010:ffffffff85e01e70 EFER = 0x0000000000000d01 PAT = 0x0000000000000000 *** Control State *** PinBased=0000003f CPUBased=b599edfa SecondaryExec=000000ca EntryControls=0000d1ff ExitControls=0023efff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=00000306 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffe495d88626 EPT pointer = 0x00000001c5c8001e binder: 6400:6423 transaction failed 29189/-22, size 80-16 line 2848 binder_alloc: binder_alloc_mmap_handler: 6400 20000000-20002000 already mapped failed -16 binder: 6400:6441 DecRefs 0 refcount change on invalid ref 2 ret -22 binder: 6400:6423 transaction failed 29189/-22, size 80-16 line 2848 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 x_tables: ip_tables: rpfilter match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING x_tables: ip_tables: rpfilter match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING raw_sendmsg: syz-executor7 forgot to set AF_INET. Fix it! IPVS: set_ctl: invalid protocol: 13703 39.52.93.236:60696 Ɓtpm`x/.HݼބDBC+ IPVS: set_ctl: invalid protocol: 13703 39.52.93.236:60696 Ɓtpm`x/.HݼބDBC+ ipt_ECN: new ECT codepoint 80 out of mask QAT: Invalid ioctl ipt_ECN: new ECT codepoint 80 out of mask kauditd_printk_skb: 17 callbacks suppressed audit: type=1400 audit(1519417902.891:39): avc: denied { map } for pid=6673 comm="syz-executor0" path="/dev/usbmon0" dev="devtmpfs" ino=1145 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usbmon_device_t:s0 tclass=chr_file permissive=1 QAT: Invalid ioctl x_tables: ip6_tables: TCPOPTSTRIP target: only valid in mangle table, not raw loop_reread_partitions: partition scan of loop0 ( >ό-l ) failed (rc=-13) x_tables: ip6_tables: TCPOPTSTRIP target: only valid in mangle table, not raw loop_reread_partitions: partition scan of loop0 () failed (rc=-13) audit: type=1400 audit(1519417903.142:40): avc: denied { call } for pid=6766 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=binder permissive=1 binder: send failed reply for transaction 5 to 6766:6774 audit: type=1400 audit(1519417903.144:41): avc: denied { transfer } for pid=6766 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=binder permissive=1 binder: send failed reply for transaction 9 to 6766:6774 audit: type=1400 audit(1519417903.235:42): avc: denied { ioctl } for pid=6792 comm="syz-executor3" path="socket:[18185]" dev="sockfs" ino=18185 ioctlcmd=0x8991 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_crypto_socket permissive=1 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189