R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006efa78 R13: 00000000ffffffff R14: 00007f22a35e26d4 R15: 0000000000000000 ============================= 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-executor1/10137: #0: (cb_lock){++++}, at: [<00000000d12ff6f4>] genl_rcv+0x19/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<00000000975d9ad2>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<00000000975d9ad2>] genl_rcv_msg+0x115/0x140 net/netlink/genetlink.c:622 stack backtrace: CPU: 1 PID: 10137 Comm: syz-executor1 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:00007ff5c3ff5c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff5c3ff6700 RCX: 0000000000453299 RDX: 0000000000000000 RSI: 0000000020003000 RDI: 0000000000000013 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000 R13: 0000000000a2f33f R14: 00007ff5c3ff69c0 R15: 0000000000000000 audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=1 audit_rate_limit=0 audit_backlog_limit=64 audit: backlog limit exceeded audit: audit_backlog=65 > audit_backlog_limit=64 audit: audit_lost=2 audit_rate_limit=0 audit_backlog_limit=64 audit: backlog limit exceeded audit: audit_backlog=65 > audit_backlog_limit=64 futex_wake_op: syz-executor3 tries to shift op by -1; fix this program futex_wake_op: syz-executor3 tries to shift op by -1; fix this program sctp: [Deprecated]: syz-executor4 (pid 10466) Use of int in max_burst socket option. Use struct sctp_assoc_value instead xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. sctp: [Deprecated]: syz-executor4 (pid 10480) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor4 (pid 10475) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor4 (pid 10484) Use of int in maxseg socket option. Use struct sctp_assoc_value instead ipt_ECN: unsupported ECN operation ff ipt_ECN: unsupported ECN operation ff device syz4 entered promiscuous mode PPPIOCDETACH file->f_count=2 netlink: 4 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor2'. kauditd_printk_skb: 915 callbacks suppressed audit: type=1400 audit(1517213327.742:1008): avc: denied { net_admin } for pid=5465 comm="syz-executor0" capability=12 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(1517213327.744:1009): avc: denied { prog_load } for pid=10854 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1 audit: type=1400 audit(1517213327.746:1010): avc: denied { dac_read_search } for pid=10854 comm="syz-executor7" capability=2 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(1517213327.748:1011): avc: denied { net_admin } for pid=3729 comm="syz-executor3" capability=12 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(1517213327.748:1012): avc: denied { net_admin } for pid=3729 comm="syz-executor3" capability=12 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(1517213327.754:1013): avc: denied { dac_read_search } for pid=10854 comm="syz-executor7" capability=2 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(1517213327.757:1014): avc: denied { dac_override } for pid=10854 comm="syz-executor7" capability=1 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(1517213327.766:1015): avc: denied { net_raw } for pid=10884 comm="syz-executor1" capability=13 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(1517213327.771:1016): avc: denied { dac_read_search } for pid=10860 comm="syz-executor2" capability=2 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(1517213327.772:1017): avc: denied { ipc_owner } for pid=10883 comm="syz-executor5" capability=15 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 netlink: 'syz-executor7': attribute type 1 has an invalid length. netlink: 'syz-executor7': attribute type 1 has an invalid length. 9pnet_virtio: no channels available for device ./file0 binder: 11278:11279 transaction failed 29189/-22, size 80-16 line 2788 binder_alloc: 11278: binder_alloc_buf, no vma binder: 11278:11279 transaction failed 29189/-3, size 80-16 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 9pnet_virtio: no channels available for device ./file0 device syz5 entered promiscuous mode binder: 11476:11478 got transaction with invalid offset (40, min 24 max 40) or object. binder: 11476:11478 transaction failed 29201/-22, size 40-16 line 2966 device syz5 left promiscuous mode device syz5 entered promiscuous mode binder_alloc: binder_alloc_mmap_handler: 11476 20000000-20002000 already mapped failed -16 binder_alloc: 11476: binder_alloc_buf, no vma binder: 11476:11490 transaction failed 29189/-3, size 40-16 line 2903 binder: BINDER_SET_CONTEXT_MGR already set binder: 11476:11478 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201