netlink: 'syz-executor6': attribute type 1 has an invalid length. sctp: [Deprecated]: syz-executor3 (pid 6217) Use of int in max_burst socket option. Use struct sctp_assoc_value instead ============================= WARNING: suspicious RCU usage 4.15.0+ #221 Not tainted sctp: [Deprecated]: syz-executor3 (pid 6225) Use of int in max_burst socket option. Use struct sctp_assoc_value instead ----------------------------- 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-executor6/6218: #0: ( syz-executor5 (6213) used greatest stack depth: 14576 bytes left cb_lock){++++}, at: [<000000004bdfcf78>] genl_rcv+0x19/0x40 net/netlink/genetlink.c:634 #1: (genl_mutex){+.+.}, at: [<00000000482c2989>] genl_lock net/netlink/genetlink.c:33 [inline] #1: (genl_mutex){+.+.}, at: [<00000000482c2989>] genl_rcv_msg+0x115/0x140 net/netlink/genetlink.c:622 stack backtrace: CPU: 1 PID: 6218 Comm: syz-executor6 Not tainted 4.15.0+ #221 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:4592 tipc_bearer_find+0x2b4/0x3b0 net/tipc/bearer.c:177 tipc_nl_compat_link_set+0x329/0x9f0 net/tipc/netlink_compat.c:729 sock: sock_set_timeout: `syz-executor4' (pid 6237) tries to set negative timeout __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:2442 genl_rcv+0x28/0x40 net/netlink/genetlink.c:635 netlink_unicast_kernel net/netlink/af_netlink.c:1308 [inline] netlink_unicast+0x4c4/0x6b0 net/netlink/af_netlink.c:1334 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1897 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 ___sys_sendmsg+0x767/0x8b0 net/socket.c:2046 __sys_sendmsg+0xe5/0x210 net/socket.c:2080 SYSC_sendmsg net/socket.c:2091 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2087 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x4537d9 RSP: 002b:00007fa225171c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa225172700 RCX: 00000000004537d9 RDX: 0000000000000000 RSI: 0000000020003000 RDI: 0000000000000013 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000000 R13: 0000000000a2f09f R14: 00007fa2251729c0 R15: 0000000000000000 sctp: [Deprecated]: syz-executor1 (pid 6246) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 'syz-executor2': attribute type 11 has an invalid length. netlink: 'syz-executor2': attribute type 11 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor5'. raw_sendmsg: syz-executor3 forgot to set AF_INET. Fix it! kauditd_printk_skb: 13 callbacks suppressed audit: type=1400 audit(1518204148.200:35): avc: denied { shutdown } for pid=6517 comm="syz-executor5" 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 syz0: Invalid MTU -2 requested, hw min 68 syz0: Invalid MTU -2 requested, hw min 68 Cannot find set identified by id 32769 to match TCP: request_sock_TCPv6: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. audit: type=1400 audit(1518204148.699:36): avc: denied { prog_run } for pid=6645 comm="syz-executor2" 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 Cannot find set identified by id 32769 to match audit: type=1400 audit(1518204148.973:37): avc: denied { getattr } for pid=6698 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 audit: type=1400 audit(1518204149.035:38): avc: denied { write } for pid=6705 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=netlink_crypto_socket permissive=1 audit: type=1400 audit(1518204149.050:39): avc: denied { listen } for pid=6705 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=netlink_crypto_socket permissive=1 netlink: 'syz-executor5': attribute type 1 has an invalid length. netlink: 'syz-executor5': attribute type 1 has an invalid length. audit: type=1400 audit(1518204149.909:40): avc: denied { read } for pid=6952 comm="syz-executor5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 audit: type=1400 audit(1518204149.943:41): avc: denied { connect } for pid=6952 comm="syz-executor5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 ipt_CLUSTERIP: Please specify an interface name netlink: 'syz-executor6': attribute type 3 has an invalid length. netlink: 'syz-executor6': attribute type 3 has an invalid length. validate_nla: 1 callbacks suppressed netlink: 'syz-executor3': attribute type 33 has an invalid length. A link change request failed with some changes committed already. Interface syz3 may have been left with an inconsistent configuration, please check. audit: type=1400 audit(1518204151.702:42): avc: denied { setopt } for pid=7436 comm="syz-executor5" 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 NFQUEUE: number of total queues is 0 NFQUEUE: number of total queues is 0 netlink: 'syz-executor3': attribute type 33 has an invalid length. A link change request failed with some changes committed already. Interface syz3 may have been left with an inconsistent configuration, please check. netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 1 has an invalid length. audit: type=1400 audit(1518204152.463:43): avc: denied { map } for pid=7639 comm="syz-executor3" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=19879 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 atomic_op 00000000e4d3062f conn xmit_atomic (null) atomic_op 0000000045f50105 conn xmit_atomic (null) atomic_op 00000000272ad12c conn xmit_atomic (null) atomic_op 0000000003371d71 conn xmit_atomic (null) device syz6 entered promiscuous mode device syz6 left promiscuous mode atomic_op 000000002579eed8 conn xmit_atomic (null) atomic_op 00000000a306f3e1 conn xmit_atomic (null) FAULT_INJECTION: forcing a failure. name fail_page_alloc, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 7836 Comm: syz-executor4 Not tainted 4.15.0+ #221 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 nla_parse: 3 callbacks suppressed netlink: 15 bytes leftover after parsing attributes in process `syz-executor0'. should_fail_alloc_page mm/page_alloc.c:2955 [inline] prepare_alloc_pages mm/page_alloc.c:4194 [inline] __alloc_pages_nodemask+0x338/0xd80 mm/page_alloc.c:4233 audit: type=1400 audit(1518204153.249:44): avc: denied { bind } for pid=7842 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_crypto_socket permissive=1 netlink: 15 bytes leftover after parsing attributes in process `syz-executor0'. alloc_pages_current+0xb6/0x1e0 mm/mempolicy.c:2055 alloc_pages include/linux/gfp.h:492 [inline] skb_page_frag_refill+0x358/0x5f0 net/core/sock.c:2208 tun_build_skb.isra.50+0x2f0/0x1810 drivers/net/tun.c:1630 tun_get_user+0x17d0/0x3940 drivers/net/tun.c:1800 tun_chr_write_iter+0xb9/0x160 drivers/net/tun.c:1986 call_write_iter include/linux/fs.h:1781 [inline] do_iter_readv_writev+0x55c/0x830 fs/read_write.c:653 do_iter_write+0x154/0x540 fs/read_write.c:932 vfs_writev+0x18a/0x340 fs/read_write.c:977 do_writev+0xfc/0x2a0 fs/read_write.c:1012 SYSC_writev fs/read_write.c:1085 [inline] SyS_writev+0x27/0x30 fs/read_write.c:1082 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x4536b1 RSP: 002b:00007f3d41762b80 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 000000000000005f RCX: 00000000004536b1 RDX: 0000000000000001 RSI: 00007f3d41762bd0 RDI: 0000000000000012 RBP: 00000000200f805f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000066 R11: 0000000000000293 R12: 0000000000000066 R13: 0000000000000014 R14: 00007f3d417636d4 R15: ffffffffffffffff atomic_op 00000000f4b2bda9 conn xmit_atomic (null) FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 1 PID: 7886 Comm: syz-executor4 Not tainted 4.15.0+ #221 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc+0x47/0x760 mm/slab.c:3539 __build_skb+0x9d/0x450 net/core/skbuff.c:281 build_skb+0x6f/0x2a0 net/core/skbuff.c:312 tun_build_skb.isra.50+0x9cb/0x1810 drivers/net/tun.c:1690 atomic_op 000000002be437ac conn xmit_atomic (null) tun_get_user+0x17d0/0x3940 drivers/net/tun.c:1800 tun_chr_write_iter+0xb9/0x160 drivers/net/tun.c:1986 call_write_iter include/linux/fs.h:1781 [inline] do_iter_readv_writev+0x55c/0x830 fs/read_write.c:653 do_iter_write+0x154/0x540 fs/read_write.c:932 vfs_writev+0x18a/0x340 fs/read_write.c:977 do_writev+0xfc/0x2a0 fs/read_write.c:1012 SYSC_writev fs/read_write.c:1085 [inline] SyS_writev+0x27/0x30 fs/read_write.c:1082 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x4536b1 RSP: 002b:00007f3d41762b80 EFLAGS: 00000293 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007f3d41762aa0 RCX: 00000000004536b1 RDX: 0000000000000001 RSI: 00007f3d41762bd0 RDI: 0000000000000012 RBP: 00007f3d41762a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000066 R11: 0000000000000293 R12: 00000000004b863a R13: 00007f3d41762bc8 R14: 00000000004b863a R15: 0000000000000000 atomic_op 00000000e2fa1a71 conn xmit_atomic (null) atomic_op 000000003a952aff conn xmit_atomic (null) netlink: 'syz-executor6': attribute type 33 has an invalid length. A link change request failed with some changes committed already. Interface syz6 may have been left with an inconsistent configuration, please check. netlink: 'syz-executor6': attribute type 33 has an invalid length. A link change request failed with some changes committed already. Interface syz6 may have been left with an inconsistent configuration, please check. netlink: 40 bytes leftover after parsing attributes in process `syz-executor5'. audit: type=1400 audit(1518204155.198:45): avc: denied { connect } for pid=8195 comm="syz-executor6" 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 audit: type=1400 audit(1518204156.127:46): avc: denied { net_bind_service } for pid=8464 comm="syz-executor7" capability=10 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(1518204156.257:47): avc: denied { create } for pid=8493 comm="syz-executor5" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_fib_lookup_socket permissive=1 audit: type=1400 audit(1518204156.286:48): avc: denied { write } for pid=8493 comm="syz-executor5" path="socket:[20676]" dev="sockfs" ino=20676 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_fib_lookup_socket permissive=1 netlink: 'syz-executor0': attribute type 2 has an invalid length. audit: type=1400 audit(1518204156.414:49): avc: denied { read } for pid=8523 comm="syz-executor6" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_crypto_socket permissive=1 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 PID: 8533 Comm: syz-executor3 Not tainted 4.15.0+ #221 netlink: 'syz-executor6': attribute type 2 has an invalid length. 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 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x8c0/0xa40 lib/fault-inject.c:149 should_failslab+0xec/0x120 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc mm/slab.c:3365 [inline] __do_kmalloc mm/slab.c:3703 [inline] __kmalloc+0x63/0x760 mm/slab.c:3714 kmalloc include/linux/slab.h:517 [inline] sock_kmalloc+0x112/0x190 net/core/sock.c:1986 netlink: 'syz-executor6': attribute type 2 has an invalid length. ___sys_sendmsg+0x458/0x8b0 net/socket.c:2013 __sys_sendmsg+0xe5/0x210 net/socket.c:2080 SYSC_sendmsg net/socket.c:2091 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2087 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x4537d9 RSP: 002b:00007faabf0e4c58 EFLAGS: 00000212 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007faabf0e4aa0 RCX: 00000000004537d9 RDX: 0000000000000000 RSI: 0000000020019fc8 RDI: 0000000000000013 RBP: 00007faabf0e4a90 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 00000000004b863a R13: 00007faabf0e4bc8 R14: 00000000004b863a R15: 0000000000000000