WARNING: suspicious RCU usage binder: BINDER_SET_CONTEXT_MGR already set binder: 7630:7653 ioctl 40046207 0 returned -16 binder: 7630:7653 DecRefs 0 refcount change on invalid ref 3 ret -22 binder: 7630:7653 got reply transaction with no transaction stack binder: 7630:7653 transaction failed 29201/-71, size 0-0 line 2703 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-executor7/7642: #0: (cb_lock){++++}, at: [<0000000075563f6f>] genl_rcv+0x19/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000007a6836cb>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000007a6836cb>] genl_rcv_msg+0x115/0x140 net/netlink/genetlink.c:622 stack backtrace: CPU: 0 PID: 7642 Comm: syz-executor7 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:00007f25a9610c58 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: 00007f25a96116d4 R15: 0000000000000000 binder: 7675:7689 ERROR: BC_REGISTER_LOOPER called without request binder: 7675:7689 ERROR: BC_REGISTER_LOOPER called without request binder: 7675:7689 IncRefs 0 refcount change on invalid ref 3 ret -22 binder: 7689 RLIMIT_NICE not set binder: 7689 RLIMIT_NICE not set binder_alloc: binder_alloc_mmap_handler: 7675 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 7675:7689 ioctl 40046207 0 returned -16 binder: 7675:7689 ERROR: BC_REGISTER_LOOPER called without request binder: 7675:7697 ERROR: BC_REGISTER_LOOPER called without request binder: 7675:7697 IncRefs 0 refcount change on invalid ref 3 ret -22 binder: 7697 RLIMIT_NICE not set binder: release 7675:7689 transaction 17 in, still active binder: send failed reply for transaction 17 to 7675:7697 binder: unexpected work type, 4, not freed binder: unexpected work type, 4, not freed binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 QAT: Invalid ioctl sock: sock_set_timeout: `syz-executor7' (pid 7759) tries to set negative timeout QAT: Invalid ioctl sock: sock_set_timeout: `syz-executor7' (pid 7769) tries to set negative timeout capability: warning: `syz-executor2' uses deprecated v2 capabilities in a way that may be insecure IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 xt_cgroup: invalid path, errno=-2 xt_cgroup: invalid path, errno=-2 openvswitch: netlink: Message has 4 unknown bytes. QAT: Invalid ioctl openvswitch: netlink: Message has 4 unknown bytes. kauditd_printk_skb: 201 callbacks suppressed audit: type=1400 audit(1517211660.220:338): avc: denied { dac_override } for pid=8231 comm="syz-executor6" capability=1 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(1517211660.233:339): avc: denied { net_admin } for pid=3732 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 binder: 8242:8249 ioctl c0306201 20000000 returned -14 binder: 8242:8264 ioctl c0306201 20000000 returned -14 audit: type=1400 audit(1517211660.391:340): avc: denied { net_raw } for pid=8267 comm="syz-executor5" capability=13 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(1517211660.442:341): avc: denied { prog_load } for pid=8279 comm="syz-executor3" 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=1326 audit(1517211660.569:342): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8302 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517211660.570:343): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8302 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1400 audit(1517211660.588:344): avc: denied { map } for pid=8317 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=1326 audit(1517211660.595:345): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8302 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=122 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517211660.596:346): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8302 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517211660.596:347): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8302 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 netlink: 'syz-executor5': attribute type 16 has an invalid length. ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP syz-executor0 (8506) used greatest stack depth: 14608 bytes left binder: 8729:8736 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 8729:8756 Release 1 refcount change on invalid ref 0 ret -22 dccp_v4_rcv: dropped packet with invalid checksum dccp_v4_rcv: dropped packet with invalid checksum binder: 8975:8976 got new transaction with bad transaction stack, transaction 27 has target 8975:0 binder: 8975:8976 transaction failed 29201/-71, size 0-8 line 2815 Cannot find add_set index 0 as target Cannot find add_set index 0 as target binder_alloc: binder_alloc_mmap_handler: 8975 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 8975:8986 ioctl 40046207 0 returned -16 binder_alloc: 8975: binder_alloc_buf, no vma binder: 8975:8986 transaction failed 29189/-3, size 40-8 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 8975:8976 transaction 27 out, still active binder: unexpected work type, 4, not freed binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29201 binder: send failed reply for transaction 27, target dead tmpfs: No value for mount option ',4' kauditd_printk_skb: 155 callbacks suppressed audit: type=1400 audit(1517211665.545:503): avc: denied { name_bind } for pid=9292 comm="syz-executor1" src=20004 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 audit: type=1400 audit(1517211665.545:504): avc: denied { node_bind } for pid=9292 comm="syz-executor1" src=20004 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:node_t:s0 tclass=dccp_socket permissive=1 dccp_invalid_packet: P.type (REQUEST) not Data || [Data]Ack, while P.X == 0 dccp_invalid_packet: P.type (REQUEST) not Data || [Data]Ack, while P.X == 0 kvm: apic: phys broadcast and lowest prio netlink: 'syz-executor1': attribute type 10 has an invalid length. netlink: 'syz-executor1': attribute type 10 has an invalid length. QAT: Invalid ioctl audit: type=1400 audit(1517211666.387:505): avc: denied { getopt } for pid=9469 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 audit: type=1400 audit(1517211666.388:506): avc: denied { accept } for pid=9469 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 netlink: 16 bytes leftover after parsing attributes in process `syz-executor1'. QAT: Invalid ioctl