WARNING: possible circular locking dependency detected 4.15.0+ #290 Not tainted ------------------------------------------------------ syz-executor0/29975 is trying to acquire lock: (rtnl_mutex){+.+.}, at: [<00000000e63b9545>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 but task is already holding lock: (sk_lock-AF_INET){+.+.}, at: [<00000000bdbfd7eb>] lock_sock include/net/sock.h:1461 [inline] (sk_lock-AF_INET){+.+.}, at: [<00000000bdbfd7eb>] 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_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 -> #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-executor0/29975: #0: (sk_lock-AF_INET){+.+.}, at: [<00000000bdbfd7eb>] lock_sock include/net/sock.h:1461 [inline] #0: (sk_lock-AF_INET){+.+.}, at: [<00000000bdbfd7eb>] ip_setsockopt+0x8c/0xb0 net/ipv4/ip_sockglue.c:1259 stack backtrace: CPU: 0 PID: 29975 Comm: syz-executor0 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:00007f5895d4ac58 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: 00007f5895d4b6d4 R15: 0000000000000000 Cannot find add_set index 0 as target SELinux: unrecognized netlink message: protocol=4 nlmsg_type=17 sclass=netlink_tcpdiag_socket pig=30062 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=17 sclass=netlink_tcpdiag_socket pig=30082 comm=syz-executor7 syz0: Invalid MTU 0 requested, hw min 68 syz0: Invalid MTU 0 requested, hw min 68 netlink: 20 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 20 bytes leftover after parsing attributes in process `syz-executor7'. futex_wake_op: syz-executor0 tries to shift op by -1; fix this program futex_wake_op: syz-executor0 tries to shift op by -1; fix this program xt_hashlimit: overflow, rate too high: 0 xt_hashlimit: overflow, rate too high: 0 ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP tmpfs: No value for mount option '±' TCP: request_sock_TCPv6: Possible SYN flooding on port 20026. Sending cookies. Check SNMP counters. netlink: 'syz-executor0': attribute type 16 has an invalid length. kauditd_printk_skb: 61 callbacks suppressed audit: type=1400 audit(1517486173.550:2345): avc: denied { map } for pid=30800 comm="syz-executor1" path="/dev/vcs" dev="devtmpfs" ino=9006 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:tty_device_t:s0 tclass=chr_file permissive=1 audit: type=1400 audit(1517486173.796:2346): avc: denied { map } for pid=30853 comm="syz-executor2" path="/dev/sg0" dev="devtmpfs" ino=1144 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:scsi_generic_device_t:s0 tclass=chr_file permissive=1 audit: type=1400 audit(1517486173.799:2347): avc: denied { map } for pid=30850 comm="syz-executor3" path="/dev/ppp" dev="devtmpfs" ino=9103 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ppp_device_t:s0 tclass=chr_file permissive=1 xt_l2tp: invalid flags combination: 0 binder_alloc: binder_alloc_mmap_handler: 31007 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 31007:31018 ioctl 40046207 0 returned -16 binder_alloc: 31007: binder_alloc_buf, no vma binder: 31007:31018 transaction failed 29189/-3, size 0-0 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_COMPLETE binder: undelivered transaction 149, process died. audit: type=1326 audit(1517486174.551:2348): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=31076 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffb0000 device syz6 entered promiscuous mode device syz6 left promiscuous mode audit: type=1326 audit(1517486174.599:2349): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=31076 comm="syz-executor7" exe="/root/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffb0000 QAT: Invalid ioctl QAT: Invalid ioctl FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 0 PID: 31159 Comm: syz-executor4 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:418 [inline] slab_alloc mm/slab.c:3364 [inline] kmem_cache_alloc_trace+0x4b/0x750 mm/slab.c:3604 kmalloc include/linux/slab.h:499 [inline] kzalloc include/linux/slab.h:688 [inline] alloc_pipe_info+0xb1/0x350 fs/pipe.c:628 splice_direct_to_actor+0x64a/0x820 fs/splice.c:920 do_splice_direct+0x29b/0x3c0 fs/splice.c:1061 do_sendfile+0x5c9/0xe80 fs/read_write.c:1413 SYSC_sendfile64 fs/read_write.c:1468 [inline] SyS_sendfile64+0xbd/0x160 fs/read_write.c:1460 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fa61d6e2c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fa61d6e2950 RCX: 0000000000453299 RDX: 00000000206c7000 RSI: 0000000000000013 RDI: 0000000000000013 RBP: 00007fa61d6e2940 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000002a R11: 0000000000000212 R12: 00000000004b7d7d R13: 00007fa61d6e2ac8 R14: 00000000004b7d8f R15: 0000000000000000 audit: type=1326 audit(1517486175.393:2350): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=31177 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517486175.425:2351): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=31177 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=235 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517486175.426:2352): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=31177 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517486175.427:2353): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=31177 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=257 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517486175.427:2354): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=31177 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl binder: 31418:31425 ERROR: BC_REGISTER_LOOPER called without request irq bypass consumer (token 00000000401a0607) registration fails: -16 binder: 31425 RLIMIT_NICE not set binder: 31425 RLIMIT_NICE not set binder: 31418:31425 got transaction with invalid offset (0, min 0 max 0) or object. binder: 31418:31425 transaction failed 29201/-22, size 0-8 line 2966 binder_alloc: binder_alloc_mmap_handler: 31418 20000000-20002000 already mapped failed -16 binder: 31418:31440 ERROR: BC_REGISTER_LOOPER called without request binder: BINDER_SET_CONTEXT_MGR already set binder: 31418:31425 ioctl 40046207 0 returned -16 binder_alloc: 31418: binder_alloc_buf, no vma binder: 31418:31425 transaction failed 29189/-3, size 0-0 line 2903 binder_alloc: 31418: binder_alloc_buf, no vma binder: 31418:31440 transaction failed 29189/-3, size 0-8 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 31418:31425 transaction 152 in, still active binder: send failed reply for transaction 152 to 31418:31440 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 1 has an invalid length. device eql entered promiscuous mode sctp: [Deprecated]: syz-executor3 (pid 31737) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor3 (pid 31737) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead xt_LED: No 'id' parameter given. xt_LED: No 'id' parameter given. binder: 31988 RLIMIT_NICE not set binder: 31988 RLIMIT_NICE not set binder: release 31982:31988 transaction 158 out, still active binder: release 31982:31988 transaction 157 in, still active binder: undelivered TRANSACTION_COMPLETE binder: release 31982:31997 transaction 157 out, still active binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 158, target dead binder: send failed reply for transaction 157, target dead sctp: [Deprecated]: syz-executor2 (pid 32042) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor2 (pid 32042) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead binder: 32113:32115 ERROR: BC_REGISTER_LOOPER called without request binder: 32115 RLIMIT_NICE not set Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! binder: 32113:32129 got reply transaction with bad transaction stack, transaction 160 has target 32113:0 binder: 32113:32129 transaction failed 29201/-71, size 0-0 line 2718 binder: BINDER_SET_CONTEXT_MGR already set binder: 32113:32129 ioctl 40046207 0 returned -16 binder: 32113:32129 ERROR: BC_REGISTER_LOOPER called without request binder: 32129 RLIMIT_NICE not set binder_alloc: 32113: binder_alloc_buf, no vma binder: 32113:32134 transaction failed 29189/-3, size 0-0 line 2903 binder: 32115 RLIMIT_NICE not set binder: release 32113:32115 transaction 160 in, still active binder: send failed reply for transaction 160 to 32113:32129 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 kauditd_printk_skb: 92 callbacks suppressed audit: type=1326 audit(1517486178.917:2447): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=32151 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517486178.918:2448): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=32151 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517486178.924:2449): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=32151 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=2 compat=0 ip=0x40d591 code=0x7ffc0000 audit: type=1326 audit(1517486178.924:2450): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=32151 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=1017 sclass=netlink_tcpdiag_socket pig=32196 comm=syz-executor1 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=1017 sclass=netlink_tcpdiag_socket pig=32197 comm=syz-executor1 audit: type=1326 audit(1517486178.924:2451): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=32151 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517486178.955:2452): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=32151 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=63 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517486178.955:2453): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=32151 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517486178.955:2454): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=32151 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1400 audit(1517486178.957:2455): avc: denied { map } for pid=32161 comm="syz-executor7" path="/root/syz-executor7" dev="sda1" ino=16480 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 audit: type=1326 audit(1517486178.958:2456): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=32151 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=9 compat=0 ip=0x453299 code=0x7ffc0000