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-executor2/8926: #0: (cb_lock){++++}, at: [<00000000340ee701>] genl_rcv+0x19/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<00000000d8d1fdc0>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<00000000d8d1fdc0>] genl_rcv_msg+0x115/0x140 net/netlink/genetlink.c:622 stack backtrace: CPU: 1 PID: 8926 Comm: syz-executor2 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:00007f4ab078bc58 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: 00007f4ab078c6d4 R15: 0000000000000000 netlink: 'syz-executor0': attribute type 33 has an invalid length. netlink: 'syz-executor0': attribute type 33 has an invalid length. netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 1 has an invalid length. kauditd_printk_skb: 133 callbacks suppressed audit: type=1400 audit(1517209037.098:376): avc: denied { map } for pid=9418 comm="syz-executor6" path="/dev/loop0" dev="devtmpfs" ino=9109 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:fixed_disk_device_t:s0 tclass=blk_file permissive=1 audit: type=1400 audit(1517209037.141:377): avc: denied { map } for pid=9424 comm="syz-executor7" path="socket:[22068]" dev="sockfs" ino=22068 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=rawip_socket permissive=1 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready audit: type=1326 audit(1517209037.725:378): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9569 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517209037.752:379): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9569 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=83 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517209037.756:380): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9569 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517209037.764:381): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9569 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=2 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517209037.765:382): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9569 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517209037.767:383): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9569 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=258 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517209037.768:384): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9569 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517209037.768:385): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9569 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 QAT: Invalid ioctl QAT: Invalid ioctl binder: 9635:9636 Release 1 refcount change on invalid ref 0 ret -22 binder_alloc: binder_alloc_mmap_handler: 9635 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 9635:9636 ioctl 40046207 0 returned -16 binder_alloc: 9635: binder_alloc_buf, no vma binder: 9635:9654 transaction failed 29189/-3, size 40-8 line 2903 binder_alloc: 9635: binder_alloc_buf, no vma binder: 9635:9636 transaction failed 29189/-3, size 40-0 line 2903 binder: BINDER_SET_CONTEXT_MGR already set binder: 9660:9664 ioctl 40046207 0 returned -16 binder_alloc: 9635: binder_alloc_buf, no vma binder: 9660:9664 transaction failed 29189/-3, size 0--630 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 9635:9636 transaction 21 out, still active binder: send failed reply for transaction 21, target dead binder: undelivered transaction 24, process died. binder: 9660:9667 transaction failed 29201/-28, size 0--630 line 2903 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 QAT: Invalid ioctl QAT: Invalid ioctl netlink: 'syz-executor3': attribute type 21 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 'syz-executor3': attribute type 21 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. pit: kvm: requested 5866 ns i8254 timer period limited to 500000 ns sock: sock_set_timeout: `syz-executor1' (pid 10147) tries to set negative timeout sock: sock_set_timeout: `syz-executor1' (pid 10147) tries to set negative timeout netlink: 'syz-executor2': attribute type 1 has an invalid length. ptrace attach of "/root/syz-executor6"[3733] was attempted by "/root/syz-executor6"[10310] ptrace attach of "/root/syz-executor6"[3733] was attempted by "/root/syz-executor6"[10310] binder: release 10447:10451 transaction 31 out, still active binder: unexpected work type, 4, not freed binder: undelivered TRANSACTION_COMPLETE binder_alloc: binder_alloc_mmap_handler: 10447 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 10447:10467 ioctl 40046207 0 returned -16 binder_alloc: 10447: binder_alloc_buf, no vma binder: 10447:10485 transaction failed 29189/-3, size 40-8 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: send failed reply for transaction 31, target dead netlink: 'syz-executor0': attribute type 1 has an invalid length. netlink: 'syz-executor0': attribute type 1 has an invalid length. QAT: Invalid ioctl device eql entered promiscuous mode netlink: 'syz-executor4': attribute type 21 has an invalid length. QAT: Invalid ioctl netlink: 'syz-executor4': attribute type 21 has an invalid length. QAT: Invalid ioctl QAT: Invalid ioctl xt_l2tp: missing protocol rule (udp|l2tpip) IPVS: ftp: loaded support on port[0] = 21 QAT: failed to copy from user. kauditd_printk_skb: 191 callbacks suppressed audit: type=1326 audit(1517209044.750:577): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=10950 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000