[ 92.827072][ T27] audit: type=1800 audit(1579321411.743:26): pid=9578 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 93.798868][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 93.798881][ T27] audit: type=1800 audit(1579321412.733:29): pid=9578 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 93.826372][ T27] audit: type=1800 audit(1579321412.733:30): pid=9578 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.213' (ECDSA) to the list of known hosts. 2020/01/18 04:23:42 parsed 1 programs 2020/01/18 04:23:45 executed programs: 0 syzkaller login: [ 106.151761][ T9747] IPVS: ftp: loaded support on port[0] = 21 [ 106.211430][ T9747] chnl_net:caif_netlink_parms(): no params data found [ 106.243346][ T9747] bridge0: port 1(bridge_slave_0) entered blocking state [ 106.251580][ T9747] bridge0: port 1(bridge_slave_0) entered disabled state [ 106.260194][ T9747] device bridge_slave_0 entered promiscuous mode [ 106.268543][ T9747] bridge0: port 2(bridge_slave_1) entered blocking state [ 106.275803][ T9747] bridge0: port 2(bridge_slave_1) entered disabled state [ 106.284847][ T9747] device bridge_slave_1 entered promiscuous mode [ 106.302523][ T9747] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 106.315242][ T9747] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 106.336400][ T9747] team0: Port device team_slave_0 added [ 106.345687][ T9747] team0: Port device team_slave_1 added [ 106.401703][ T9747] device hsr_slave_0 entered promiscuous mode [ 106.469866][ T9747] device hsr_slave_1 entered promiscuous mode [ 106.577775][ T9747] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 106.611864][ T9747] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 106.671313][ T9747] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 106.721897][ T9747] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 106.781761][ T9747] bridge0: port 2(bridge_slave_1) entered blocking state [ 106.789405][ T9747] bridge0: port 2(bridge_slave_1) entered forwarding state [ 106.797700][ T9747] bridge0: port 1(bridge_slave_0) entered blocking state [ 106.804948][ T9747] bridge0: port 1(bridge_slave_0) entered forwarding state [ 106.850541][ T9747] 8021q: adding VLAN 0 to HW filter on device bond0 [ 106.864745][ T3236] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 106.876608][ T3236] bridge0: port 1(bridge_slave_0) entered disabled state [ 106.886524][ T3236] bridge0: port 2(bridge_slave_1) entered disabled state [ 106.895666][ T3236] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 106.910890][ T9747] 8021q: adding VLAN 0 to HW filter on device team0 [ 106.922195][ T2899] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 106.932164][ T2899] bridge0: port 1(bridge_slave_0) entered blocking state [ 106.939572][ T2899] bridge0: port 1(bridge_slave_0) entered forwarding state [ 106.951349][ T2681] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 106.960361][ T2681] bridge0: port 2(bridge_slave_1) entered blocking state [ 106.967841][ T2681] bridge0: port 2(bridge_slave_1) entered forwarding state [ 106.990302][ T2899] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 106.999971][ T2899] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 107.011585][ T2899] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 107.026297][ T3236] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 107.041397][ T2699] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 107.053219][ T9747] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 107.072869][ T3236] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 107.080410][ T3236] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 107.095563][ T9747] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 107.115234][ T2699] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 107.137041][ T3236] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 107.145805][ T3236] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 107.154018][ T3236] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 107.165838][ T9747] device veth0_vlan entered promiscuous mode [ 107.178321][ T9747] device veth1_vlan entered promiscuous mode [ 107.210847][ T3236] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 107.220180][ T3236] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready 2020/01/18 04:23:50 executed programs: 56 [ 112.238465][T10105] [ 112.241147][T10105] ============================= [ 112.245994][T10105] WARNING: suspicious RCU usage [ 112.250999][T10105] 5.5.0-rc5-syzkaller #0 Not tainted [ 112.256286][T10105] ----------------------------- [ 112.261258][T10105] net/netfilter/ipset/ip_set_core.c:1001 suspicious rcu_dereference_protected() usage! [ 112.270995][T10105] [ 112.270995][T10105] other info that might help us debug this: [ 112.270995][T10105] [ 112.281308][T10105] [ 112.281308][T10105] rcu_scheduler_active = 2, debug_locks = 1 [ 112.289578][T10105] 1 lock held by syz-executor.0/10105: [ 112.295023][T10105] #0: ffff888090fa55d8 (nlk_cb_mutex-NETFILTER){+.+.}, at: netlink_dump+0xe7/0xfb0 [ 112.304484][T10105] [ 112.304484][T10105] stack backtrace: [ 112.310808][T10105] CPU: 1 PID: 10105 Comm: syz-executor.0 Not tainted 5.5.0-rc5-syzkaller #0 [ 112.319481][T10105] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 112.329536][T10105] Call Trace: [ 112.332832][T10105] dump_stack+0x197/0x210 [ 112.337159][T10105] lockdep_rcu_suspicious+0x153/0x15d [ 112.342639][T10105] find_set_and_id.isra.0+0x227/0x330 [ 112.348069][T10105] dump_init+0x1c1/0x3b0 [ 112.352333][T10105] ? find_set_and_id.isra.0+0x330/0x330 [ 112.357874][T10105] ? __kasan_check_read+0x11/0x20 [ 112.362897][T10105] ip_set_dump_start+0x9e6/0x1ca0 [ 112.367917][T10105] ? __kmalloc_node_track_caller+0x4e/0x70 [ 112.373767][T10105] ? __phys_addr+0xa4/0x120 [ 112.378289][T10105] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 112.384563][T10105] ? ip_set_rename+0x720/0x720 [ 112.389319][T10105] ? __kmalloc_reserve.isra.0+0xf0/0xf0 [ 112.394869][T10105] ? __kasan_check_write+0x14/0x20 [ 112.399983][T10105] netlink_dump+0x558/0xfb0 [ 112.404488][T10105] ? __netlink_sendskb+0xc0/0xc0 [ 112.409415][T10105] ? kmem_cache_free+0x26b/0x320 [ 112.414348][T10105] ? kfree_skbmem+0x100/0x1c0 [ 112.419018][T10105] ? consume_skb+0x108/0x410 [ 112.423609][T10105] netlink_recvmsg+0xbb4/0xf50 [ 112.428443][T10105] ? netlink_dump+0xfb0/0xfb0 [ 112.433128][T10105] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 112.438677][T10105] ? apparmor_socket_recvmsg+0x2a/0x30 [ 112.444189][T10105] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 112.450568][T10105] ? security_socket_recvmsg+0x95/0xc0 [ 112.456033][T10105] ? netlink_dump+0xfb0/0xfb0 [ 112.461004][T10105] sock_recvmsg+0xce/0x110 [ 112.466469][T10105] __sys_recvfrom+0x1ff/0x350 [ 112.471272][T10105] ? __ia32_sys_send+0x100/0x100 [ 112.476424][T10105] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 112.482664][T10105] ? put_timespec64+0xda/0x140 [ 112.487433][T10105] ? ns_to_kernel_old_timeval+0x100/0x100 [ 112.493149][T10105] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 112.498745][T10105] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 112.504223][T10105] ? do_syscall_64+0x26/0x790 [ 112.508899][T10105] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 112.515077][T10105] __x64_sys_recvfrom+0xe1/0x1a0 [ 112.520125][T10105] do_syscall_64+0xfa/0x790 [ 112.525046][T10105] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 112.531012][T10105] RIP: 0033:0x45aff9 [ 112.534917][T10105] Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 112.554580][T10105] RSP: 002b:00007f2d4a788c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002d [ 112.563075][T10105] RAX: ffffffffffffffda RBX: 00007f2d4a7896d4 RCX: 000000000045aff9 [ 112.571046][T10105] RDX: 36ff0824c68970de RSI: 0000000000000000 RDI: 0000000000000003 [ 112.579153][T10105] RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000226 [ 112.587143][T10105] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 112.595175][T10105] R13: 000000000000085c R14: 00000000004c9852 R15: 000000000075bf2c 2020/01/18 04:23:55 executed programs: 124 2020/01/18 04:24:00 executed programs: 197