============================= 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-executor5/18613: #0: (cb_lock){++++}, at: [<00000000e7e0abb0>] genl_rcv+0x19/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<0000000031e7d4e9>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<0000000031e7d4e9>] genl_rcv_msg+0x115/0x140 net/netlink/genetlink.c:622 stack backtrace: CPU: 0 PID: 18613 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:00007f9343993c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000000 RSI: 0000000020003000 RDI: 0000000000000013 RBP: 00000000000005c4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f7b00 R13: 00000000ffffffff R14: 00007f93439946d4 R15: 0000000000000000 ip6t_REJECT: TCP_RESET illegal for non-tcp ip6t_REJECT: TCP_RESET illegal for non-tcp rdma_op 0000000052a233df conn xmit_rdma (null) xt_AUDIT: Audit type out of range (valid range: 0..2) xt_AUDIT: Audit type out of range (valid range: 0..2) rdma_op 00000000628d3727 conn xmit_rdma (null) kauditd_printk_skb: 703 callbacks suppressed audit: type=1400 audit(1517213623.568:9062): avc: denied { map } for pid=18915 comm="modprobe" path="/bin/kmod" dev="sda1" ino=1440 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 audit: type=1400 audit(1517213623.568:9061): avc: denied { net_admin } for pid=18902 comm="syz-executor5" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517213623.577:9063): avc: denied { net_admin } for pid=18905 comm="syz-executor4" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517213623.602:9064): avc: denied { map } for pid=18908 comm="modprobe" path="/bin/kmod" dev="sda1" ino=1440 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 audit: type=1400 audit(1517213623.605:9065): avc: denied { net_admin } for pid=3730 comm="syz-executor0" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=24 audit_rate_limit=0 audit_backlog_limit=64 audit: backlog limit exceeded audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=25 audit_rate_limit=0 audit_backlog_limit=64 netlink: 'syz-executor4': attribute type 21 has an invalid length. netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 'syz-executor4': attribute type 21 has an invalid length. netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. binder: 19127:19137 transaction failed 29189/-22, size 0-0 line 2788 binder: 19127:19147 transaction failed 29189/-22, size 0-0 line 2788 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 ip_tunnel: non-ECT from 172.20.0.0 with TOS=0x1 ip_tunnel: non-ECT from 172.20.0.0 with TOS=0x1 can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. kauditd_printk_skb: 809 callbacks suppressed audit: type=1400 audit(1517213628.572:9838): avc: denied { prog_load } for pid=19705 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=bpf permissive=1 audit: type=1400 audit(1517213628.573:9839): avc: denied { create } for pid=19699 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 audit: type=1400 audit(1517213628.579:9840): avc: denied { net_admin } for pid=3731 comm="syz-executor3" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517213628.579:9841): avc: denied { net_admin } for pid=3731 comm="syz-executor3" capability=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1517213628.611:9842): avc: denied { map } for pid=19708 comm="modprobe" path="/bin/kmod" dev="sda1" ino=1440 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=38 audit_rate_limit=0 audit_backlog_limit=64 audit: backlog limit exceeded audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=39 audit_rate_limit=0 audit_backlog_limit=64 xt_l2tp: unknown flags: c2 xt_l2tp: unknown flags: c2 x_tables: ip_tables: .0 target: invalid size 8 (kernel) != (user) 0 x_tables: ip_tables: .0 target: invalid size 8 (kernel) != (user) 0 IPv4: Oversized IP packet from 127.0.0.1 QAT: Invalid ioctl QAT: Invalid ioctl binder: 19849 RLIMIT_NICE not set binder: 19849 RLIMIT_NICE not set binder: 19842:19861 BC_FREE_BUFFER u000000002000c000 matched unreturned buffer QAT: Invalid ioctl binder: BINDER_SET_CONTEXT_MGR already set binder: 19842:19861 ioctl 40046207 0 returned -16 QAT: Invalid ioctl binder_alloc: 19842: binder_alloc_buf, no vma binder: 19842:19874 transaction failed 29189/-3, size 0-0 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 19842:19849 transaction 68 in, still active binder: send failed reply for transaction 68 to 19842:19861 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 binder: 19932:19935 got transaction with invalid offset (0, min 0 max 0) or object. binder: 19932:19935 transaction failed 29201/-22, size 0-8 line 2966 binder: BINDER_SET_CONTEXT_MGR already set binder: 19932:19951 ioctl 40046207 0 returned -16 binder_alloc: 19932: binder_alloc_buf, no vma binder: 19932:19951 transaction failed 29189/-3, size 0-0 line 2903 binder_alloc: 19932: binder_alloc_buf, no vma binder: 19932:19936 transaction failed 29189/-3, size 0-8 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 futex_wake_op: syz-executor1 tries to shift op by -1; fix this program futex_wake_op: syz-executor1 tries to shift op by -1; fix this program xt_nfacct: accounting object with name `syz1' does not exists xt_nfacct: accounting object with name `syz1' does not exists