============================= WARNING: suspicious RCU usage 4.14.0-rc5+ #142 Not tainted ----------------------------- ./include/linux/inetdevice.h:230 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor0/735: #0: (rcu_read_lock){....}, at: [] inet_rtm_getroute+0xaa0/0x2d70 net/ipv4/route.c:2738 stack backtrace: CPU: 1 PID: 735 Comm: syz-executor0 Not tainted 4.14.0-rc5+ #142 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4665 __in_dev_get_rtnl include/linux/inetdevice.h:230 [inline] fib_dump_info+0x1136/0x13d0 net/ipv4/fib_semantics.c:1377 inet_rtm_getroute+0xf97/0x2d70 net/ipv4/route.c:2785 rtnetlink_rcv_msg+0x51c/0x1090 net/core/rtnetlink.c:4237 netlink_rcv_skb+0x216/0x440 net/netlink/af_netlink.c:2409 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4261 netlink_unicast_kernel net/netlink/af_netlink.c:1273 [inline] netlink_unicast+0x4e8/0x6f0 net/netlink/af_netlink.c:1299 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1862 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 sock_write_iter+0x31a/0x5d0 net/socket.c:912 call_write_iter include/linux/fs.h:1770 [inline] new_sync_write fs/read_write.c:468 [inline] __vfs_write+0x684/0x970 fs/read_write.c:481 vfs_write+0x189/0x510 fs/read_write.c:543 SYSC_write fs/read_write.c:588 [inline] SyS_write+0xef/0x220 fs/read_write.c:580 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x452719 RSP: 002b:00007f243aa5bbe8 EFLAGS: 00000212 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452719 RDX: 0000000000000024 RSI: 0000000020226000 RDI: 0000000000000014 RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6698 R13: 00000000ffffffff R14: 00007f243aa5c6d4 R15: 0000000000000000 sctp: [Deprecated]: syz-executor5 (pid 829) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead device eql entered promiscuous mode print_req_error: I/O error, dev loop0, sector 0 tty_warn_deprecated_flags: 'syz-executor7' is using deprecated serial flags (with no effect): 00000400 print_req_error: I/O error, dev loop0, sector 0 tty_warn_deprecated_flags: 'syz-executor7' is using deprecated serial flags (with no effect): 00000400 QAT: Stopping all acceleration devices. QAT: Stopping all acceleration devices. kauditd_printk_skb: 65 callbacks suppressed audit: type=1326 audit(1508656780.863:9617): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1120 comm="" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656780.868:9618): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1120 comm="" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=16 compat=0 ip=0x452719 code=0x7ffc0000 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=1138 comm=syz-executor2 QAT: Invalid ioctl QAT: Invalid ioctl IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1326 audit(1508656780.868:9619): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1120 comm="" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready audit: type=1326 audit(1508656780.869:9620): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1120 comm="" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656780.889:9621): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1120 comm="" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=72 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656780.889:9622): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1120 comm="" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656780.889:9623): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1120 comm="" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656780.890:9624): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1120 comm="" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=54 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656780.891:9625): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1120 comm="" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656780.891:9626): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=1120 comm="" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1669 sclass=netlink_route_socket pig=1224 comm=syz-executor0 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=0 nlmsg_type=1669 sclass=netlink_route_socket pig=1224 comm=syz-executor0 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl nla_parse: 6 callbacks suppressed netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. sctp: [Deprecated]: syz-executor2 (pid 1343) Use of int in maxseg socket option. Use struct sctp_assoc_value instead netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. sctp: [Deprecated]: syz-executor2 (pid 1345) Use of int in maxseg socket option. Use struct sctp_assoc_value instead RDS: rds_bind could not find a transport for 172.20.5.170, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 172.20.5.170, load rds_tcp or rds_rdma? sctp: [Deprecated]: syz-executor0 (pid 1541) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor0 (pid 1517) Use of int in maxseg socket option. Use struct sctp_assoc_value instead QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl sctp: [Deprecated]: syz-executor0 (pid 1710) Use of int in maxseg socket option. Use struct sctp_assoc_value instead SELinux: unrecognized netlink message: protocol=0 nlmsg_type=4096 sclass=netlink_route_socket pig=1772 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=1772 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=1772 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=1772 comm=syz-executor4 netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=4096 sclass=netlink_route_socket pig=1772 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=1776 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=1772 comm=syz-executor4 netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. kvm: vcpu 5: requested 68374 ns lapic timer period limited to 500000 ns kvm: vcpu 5: requested 68374 ns lapic timer period limited to 500000 ns device eql entered promiscuous mode loop_reread_partitions: partition scan of loop0 (-\t@r9hxGQ:[il L*@R-Tr-x) failed (rc=-13) sctp: [Deprecated]: syz-executor4 (pid 2100) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor4 (pid 2100) Use of int in maxseg socket option. Use struct sctp_assoc_value instead kauditd_printk_skb: 300 callbacks suppressed audit: type=1326 audit(1508656786.719:9927): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=2125 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0xffff0000 netlink: 6 bytes leftover after parsing attributes in process `syz-executor7'. audit: type=1326 audit(1508656786.838:9928): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=2125 comm="syz-executor0" exe="/root/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0xffff0000 netlink: 6 bytes leftover after parsing attributes in process `syz-executor7'. audit: type=1326 audit(1508656787.312:9929): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=2233 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656787.312:9930): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=2233 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656787.334:9931): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=2233 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=241 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656787.334:9932): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=2233 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656787.334:9933): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=2233 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656787.357:9934): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=2233 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=201 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656787.357:9935): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=2233 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 audit: type=1326 audit(1508656787.357:9936): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=2233 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x452719 code=0x7ffc0000 device eql entered promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: failed to copy from user cfg_data. netlink: 11 bytes leftover after parsing attributes in process `syz-executor4'. QAT: failed to copy from user cfg_data. netlink: 11 bytes leftover after parsing attributes in process `syz-executor4'.