============================= WARNING: suspicious RCU usage 4.15.0-rc9+ #284 Not tainted netlink: 'syz-executor0': attribute type 1 has an invalid length. ----------------------------- 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-executor2/10462: #0: (cb_lock){++++}, at: [<00000000fd38615d>] genl_rcv+0x19/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<000000008826ac99>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<000000008826ac99>] genl_rcv_msg+0x115/0x140 net/netlink/genetlink.c:622 stack backtrace: CPU: 0 PID: 10462 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:00007f97aa708c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000000 RSI: 0000000020003000 RDI: 0000000000000013 RBP: 00000000000002b7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f31c8 R13: 00000000ffffffff R14: 00007f97aa7096d4 R15: 0000000000000000 netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. binder_alloc: binder_alloc_mmap_handler: 10560 20000000-20002000 already mapped failed -16 netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. binder: BINDER_SET_CONTEXT_MGR already set binder: 10560:10617 ioctl 40046207 0 returned -16 binder_alloc: 10560: binder_alloc_buf, no vma binder: 10560:10570 transaction failed 29189/-3, size 40-8 line 2903 binder: 10560:10570 BC_ACQUIRE_DONE uffffffffffffffff no match binder: release 10560:10570 transaction 44 out, still active binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 44, target dead netlink: 'syz-executor7': attribute type 1 has an invalid length. netlink: 'syz-executor7': attribute type 1 has an invalid length. IPv6: Can't replace route, no match found IPv6: Can't replace route, no match found binder: 10755:10757 transaction failed 29189/-22, size 0-0 line 2788 binder: 10755:10771 transaction failed 29189/-22, size 0-0 line 2788 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 could not allocate digest TFM handle OC/KO~Ek@Z}Ys could not allocate digest TFM handle OC/KO~Ek@Z}Ys encrypted_key: insufficient parameters specified do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app encrypted_key: insufficient parameters specified do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready kauditd_printk_skb: 134 callbacks suppressed audit: type=1400 audit(1517211548.581:502): avc: denied { map } for pid=11111 comm="syz-executor5" path="/dev/usbmon0" dev="devtmpfs" ino=149 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:usbmon_device_t:s0 tclass=chr_file permissive=1 device syz6 entered promiscuous mode netlink: 'syz-executor7': attribute type 1 has an invalid length. netlink: 'syz-executor7': attribute type 1 has an invalid length. binder: 11214:11221 transaction failed 29189/-22, size 40-16 line 2788 binder: 11214:11222 transaction failed 29189/-22, size 40-16 line 2788 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=11287 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=24 sclass=netlink_tcpdiag_socket pig=11300 comm=syz-executor7 hrtimer: interrupt took 41857 ns IPv6: Can't replace route, no match found IPv6: Can't replace route, no match found FAULT_FLAG_ALLOW_RETRY missing 30 CPU: 0 PID: 11289 Comm: syz-executor4 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 handle_userfault+0x12fa/0x24c0 fs/userfaultfd.c:427 do_anonymous_page mm/memory.c:3127 [inline] handle_pte_fault mm/memory.c:3941 [inline] __handle_mm_fault+0x32a3/0x3ce0 mm/memory.c:4067 handle_mm_fault+0x334/0x8d0 mm/memory.c:4104 __do_page_fault+0x5c9/0xc90 arch/x86/mm/fault.c:1426 do_page_fault+0xee/0x720 arch/x86/mm/fault.c:1501 page_fault+0x2c/0x60 arch/x86/entry/entry_64.S:1260 RIP: 0010:fault_in_pages_readable include/linux/pagemap.h:601 [inline] RIP: 0010:iov_iter_fault_in_readable+0x1a7/0x410 lib/iov_iter.c:421 RSP: 0018:ffff8801c273f928 EFLAGS: 00010246 RAX: 0000000000010000 RBX: 0000000020011fd2 RCX: ffffffff82587fe1 RDX: 00000000000000c9 RSI: ffffc900024c3000 RDI: ffff8801c273fd28 RBP: ffff8801c273fa08 R08: 1ffff1003836cd42 R09: 0000000000000000 R10: ffff8801c273f858 R11: 0000000000000000 R12: 1ffff100384e7f28 R13: ffff8801c273f9e0 R14: 0000000000000000 R15: ffff8801c273fd20 generic_perform_write+0x200/0x600 mm/filemap.c:3129 __generic_file_write_iter+0x366/0x5b0 mm/filemap.c:3264 generic_file_write_iter+0x399/0x790 mm/filemap.c:3292 call_write_iter include/linux/fs.h:1772 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x684/0x970 fs/read_write.c:482 vfs_write+0x189/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fd253c5dc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 000000000000001c RSI: 0000000020011fd2 RDI: 0000000000000014 RBP: 00000000000003d6 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f4cb0 R13: 00000000ffffffff R14: 00007fd253c5e6d4 R15: 0000000000000000 QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1326 audit(1517211551.152:503): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=11583 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517211551.153:504): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=11583 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517211551.153:505): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=11583 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=53 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517211551.182:506): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=11583 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517211551.183:507): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=11583 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 xt_connbytes: Forcing CT accounting to be enabled audit: type=1326 audit(1517211551.188:508): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=11583 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=289 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517211551.188:509): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=11583 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517211551.189:510): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=11583 comm="syz-executor4" exe="/root/syz-executor4" sig=0 arch=c000003e syscall=277 compat=0 ip=0x453299 code=0x7ffc0000 IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 TCP: request_sock_TCP: Possible SYN flooding on port 20014. Sending cookies. Check SNMP counters. do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app QAT: Invalid ioctl