============================= 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-executor3/22359: #0: (cb_lock){++++}, at: [<00000000369464bb>] genl_rcv+0x19/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<00000000749821d4>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<00000000749821d4>] genl_rcv_msg+0x115/0x140 net/netlink/genetlink.c:622 stack backtrace: CPU: 1 PID: 22359 Comm: syz-executor3 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:00007f501a520c58 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: 00007f501a5216d4 R15: 0000000000000000 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=2205 sclass=netlink_route_socket pig=22460 comm=syz-executor6 syz0: Invalid MTU 0 requested, hw min 68 syz0: Invalid MTU 0 requested, hw min 68 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=2205 sclass=netlink_route_socket pig=22464 comm=syz-executor6 netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. xt_addrtype: both incoming and outgoing interface limitation cannot be selected xt_addrtype: both incoming and outgoing interface limitation cannot be selected xt_hashlimit: hashlimit invalid interval xt_hashlimit: hashlimit invalid interval netlink: 'syz-executor3': attribute type 8 has an invalid length. binder: 22627:22632 ioctl 46 20019000 returned -22 binder: 22627:22644 BC_REQUEST_DEATH_NOTIFICATION death notification already set binder: 22627:22646 ioctl 46 20019000 returned -22 binder: 22627:22644 unknown command 536907575 binder: 22627:22644 ioctl c0306201 20008fd0 returned -22 IPv4: Oversized IP packet from 172.20.6.16 netlink: 'syz-executor2': attribute type 1 has an invalid length. netlink: 'syz-executor2': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 'syz-executor1': attribute type 11 has an invalid length. netlink: 'syz-executor1': attribute type 11 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 'syz-executor7': attribute type 16 has an invalid length. kauditd_printk_skb: 134 callbacks suppressed audit: type=1400 audit(1517212779.583:1576): avc: denied { net_broadcast } for pid=23082 comm="syz-executor0" 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 audit: type=1400 audit(1517212779.654:1577): avc: denied { map } for pid=23091 comm="syz-executor7" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=54684 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 device syz0 entered promiscuous mode audit: type=1400 audit(1517212779.826:1578): avc: denied { ipc_lock } for pid=23139 comm="syz-executor3" capability=14 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 device syz3 entered promiscuous mode audit: type=1326 audit(1517212780.218:1579): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23224 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517212780.244:1580): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23224 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=120 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517212780.245:1581): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23224 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517212780.247:1582): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23224 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=55 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517212780.247:1583): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23224 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517212780.248:1584): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23224 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=114 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517212780.249:1585): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23224 comm="syz-executor7" exe="/root/syz-executor7" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 binder: 23256:23258 transaction failed 29189/-22, size 24-16 line 2788 binder: 23256:23258 transaction failed 29189/-22, size 24-16 line 2788 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 tmpfs: Bad mount option ,4MÏÄ7ö³É tmpfs: Bad mount option ,4MÏÄ7ö³É tty_warn_deprecated_flags: 'syz-executor4' is using deprecated serial flags (with no effect): 00008700 tty_warn_deprecated_flags: 'syz-executor4' is using deprecated serial flags (with no effect): 00008700 binder_alloc: 23498: binder_alloc_buf, no vma binder: 23498:23503 transaction failed 29189/-3, size 0-0 line 2903 binder_alloc: 23498: binder_alloc_buf, no vma binder: BINDER_SET_CONTEXT_MGR already set binder: 23498:23503 ioctl 40046207 0 returned -16 netlink: 395 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 395 bytes leftover after parsing attributes in process `syz-executor0'. binder: 23498:23515 transaction failed 29189/-3, size 0-0 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 validate_nla: 1 callbacks suppressed netlink: 'syz-executor5': attribute type 21 has an invalid length. netlink: 'syz-executor5': attribute type 21 has an invalid length. binder: 23821:23831 transaction failed 29189/-22, size 40-8 line 2788 binder_alloc: 23821: binder_alloc_buf, no vma binder: 23821:23831 transaction failed 29189/-3, size 40-8 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 xt_hashlimit: Unknown mode mask FFFFFFFC, kernel too old? IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 insert transport fail, errno -17 xt_cgroup: both path and classid specified xt_cgroup: both path and classid specified x86/PAT: syz-executor2:24445 map pfn RAM range req write-combining for [mem 0x1c4210000-0x1c4211fff], got write-back