============================= 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-executor7/7655: #0: (cb_lock){++++}, at: [<00000000a7c45907>] genl_rcv+0x19/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<0000000095bd5a6b>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<0000000095bd5a6b>] genl_rcv_msg+0x115/0x140 net/netlink/genetlink.c:622 stack backtrace: CPU: 0 PID: 7655 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:00007f39edccdc58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000000 RSI: 0000000020003000 RDI: 0000000000000013 RBP: 000000000000050a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6990 R13: 00000000ffffffff R14: 00007f39edcce6d4 R15: 0000000000000000 openvswitch: netlink: Message has 4 unknown bytes. binder: 7676:7677 Acquire 1 refcount change on invalid ref 0 ret -22 kauditd_printk_skb: 114 callbacks suppressed audit: type=1326 audit(1517208878.293:242): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7841 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1400 audit(1517208878.583:243): avc: denied { net_broadcast } for pid=7947 comm="syz-executor7" capability=11 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 SELinux: unrecognized netlink message: protocol=6 nlmsg_type=28005 sclass=netlink_xfrm_socket pig=7977 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=6 nlmsg_type=0 sclass=netlink_xfrm_socket pig=7989 comm=syz-executor4 audit: type=1326 audit(1517208879.022:244): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8013 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517208879.052:245): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8013 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=2 compat=0 ip=0x40d591 code=0x7ffc0000 audit: type=1326 audit(1517208879.053:246): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8013 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517208879.055:247): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8013 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517208879.070:248): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8013 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=42 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517208879.070:249): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8013 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517208879.071:250): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8013 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517208879.079:251): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=8013 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=16 compat=0 ip=0x453299 code=0x7ffc0000 device syz4 entered promiscuous mode device syz4 left promiscuous mode device syz4 entered promiscuous mode binder: 8164:8175 Release 1 refcount change on invalid ref 0 ret -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 8164:8190 ioctl 40046207 0 returned -16 binder: 8164:8190 Release 1 refcount change on invalid ref 0 ret -22 RDS: rds_bind could not find a transport for 172.20.0.170, load rds_tcp or rds_rdma? insert transport fail, errno -17 RDS: rds_bind could not find a transport for 172.20.0.170, load rds_tcp or rds_rdma? QAT: Invalid ioctl QAT: Invalid ioctl netlink: 'syz-executor2': attribute type 21 has an invalid length. netlink: 'syz-executor2': attribute type 21 has an invalid length. ptrace attach of "/root/syz-executor7"[3729] was attempted by "/root/syz-executor7"[8573] ptrace attach of "/root/syz-executor7"[3729] was attempted by "/root/syz-executor7"[8573] kauditd_printk_skb: 72 callbacks suppressed audit: type=1400 audit(1517208884.463:323): avc: denied { getopt } for pid=9040 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=netlink_generic_socket permissive=1 IPVS: ftp: loaded support on port[0] = 21 audit: type=1326 audit(1517208885.716:324): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9312 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517208885.741:325): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=9312 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=317 compat=0 ip=0x453299 code=0x7ffc0000 Cannot find add_set index 0 as target Cannot find add_set index 0 as target sock: sock_set_timeout: `syz-executor7' (pid 9556) tries to set negative timeout sock: sock_set_timeout: `syz-executor7' (pid 9569) tries to set negative timeout