============================= WARNING: suspicious RCU usage 4.15.0-rc9+ #284 Not tainted ----------------------------- net/tipc/bearer.c:177 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by syz-executor5/28696: #0: (cb_lock){++++}, at: [<0000000042048c45>] genl_rcv+0x19/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<00000000e80b611b>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<00000000e80b611b>] genl_rcv_msg+0x115/0x140 net/netlink/genetlink.c:622 stack backtrace: CPU: 0 PID: 28696 Comm: syz-executor5 Not tainted 4.15.0-rc9+ #284 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 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4587 tipc_bearer_find+0x2b4/0x3b0 net/tipc/bearer.c:177 tipc_nl_compat_link_set+0x329/0x9f0 net/tipc/netlink_compat.c:729 __tipc_nl_compat_doit net/tipc/netlink_compat.c:288 [inline] tipc_nl_compat_doit+0x15b/0x670 net/tipc/netlink_compat.c:335 tipc_nl_compat_handle net/tipc/netlink_compat.c:1119 [inline] tipc_nl_compat_recv+0x1135/0x18f0 net/tipc/netlink_compat.c:1201 genl_family_rcv_msg+0x7b7/0xfb0 net/netlink/genetlink.c:599 genl_rcv_msg+0xb2/0x140 net/netlink/genetlink.c:624 netlink_rcv_skb+0x14b/0x380 net/netlink/af_netlink.c:2409 genl_rcv+0x28/0x40 net/netlink/genetlink.c:635 netlink_unicast_kernel net/netlink/af_netlink.c:1275 [inline] netlink_unicast+0x4ee/0x700 net/netlink/af_netlink.c:1301 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1864 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg+0xca/0x110 net/socket.c:648 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2028 __sys_sendmsg+0xe5/0x210 net/socket.c:2062 SYSC_sendmsg net/socket.c:2073 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2069 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fd6a343ec58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000000 RSI: 0000000020003000 RDI: 0000000000000014 RBP: 000000000000032f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f3d08 R13: 00000000ffffffff R14: 00007fd6a343f6d4 R15: 0000000000000000 IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready kauditd_printk_skb: 116 callbacks suppressed audit: type=1326 audit(1517213241.824:2101): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=28932 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 device eql entered promiscuous mode --map-set only usable from mangle table audit: type=1326 audit(1517213242.729:2102): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=29141 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 device eql entered promiscuous mode audit: type=1326 audit(1517213242.730:2103): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=29141 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517213242.732:2104): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=29141 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=196 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517213242.732:2105): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=29141 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517213242.734:2106): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=29141 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=157 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517213242.734:2107): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=29141 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517213242.734:2108): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=29141 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=291 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517213242.735:2109): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=29141 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517213242.735:2110): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=29141 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=9 compat=0 ip=0x453299 code=0x7ffc0000 netlink: 'syz-executor1': attribute type 3 has an invalid length. netlink: 'syz-executor1': attribute type 3 has an invalid length. device eql entered promiscuous mode device eql entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl TCP: request_sock_TCP: Possible SYN flooding on port 20021. Sending cookies. Check SNMP counters. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl binder: 29729:29743 transaction failed 29189/-22, size 0-0 line 2788 binder: 29729:29754 transaction failed 29189/-22, size 0-0 line 2788 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 sock: process `syz-executor2' is using obsolete getsockopt SO_BSDCOMPAT binder: 29878:29880 got transaction with invalid offset (0, min 0 max 0) or object. binder: 29878:29880 transaction failed 29201/-22, size 0-8 line 2966 binder: 29878:29880 got transaction with invalid offsets size, 286 device eql entered promiscuous mode binder_alloc: binder_alloc_mmap_handler: 29878 20265000-20279000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 29878:29896 ioctl 40046207 0 returned -16 binder_alloc: 29878: binder_alloc_buf, no vma binder: 29878:29896 transaction failed 29189/-3, size 0-8 line 2903 binder_alloc: 29878: binder_alloc_buf, no vma binder: 29878:29896 transaction failed 29189/-3, size 0-286 line 2903 binder: 29878:29880 transaction failed 29201/-22, size 0-286 line 2939 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 9pnet_virtio: no channels available for device ./file0 9pnet_virtio: no channels available for device ./file0 binder: BINDER_SET_CONTEXT_MGR already set binder: 29978:29979 ioctl 40046207 0 returned -16 binder: release 29978:29979 transaction 179 out, still active binder: send failed reply for transaction 179, target dead binder: BINDER_SET_CONTEXT_MGR already set binder: 30128:30131 ioctl 40046207 0 returned -16 binder_alloc: 30128: binder_alloc_buf, no vma binder: 30128:30131 transaction failed 29189/-3, size 0-0 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: send failed reply for transaction 181 to 30128:30130 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=30176 comm=syz-executor2 IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready binder: undelivered death notification, 0000000000000000 binder: BINDER_SET_CONTEXT_MGR already set binder: 30392:30399 ioctl 40046207 0 returned -16 could not allocate digest TFM handle îOvÜü%íâe*uälxþ’­V^‹«guL“`Y}Þ=!+‹s°Âd¢ device eql entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl binder: undelivered death notification, 0000000000000000 binder: binder_mmap: 30458 2000c000-2000e000 bad vm_flags failed -1 binder_alloc: 30458: binder_alloc_buf, no vma kauditd_printk_skb: 97 callbacks suppressed