[ 74.886736][ T27] audit: type=1800 audit(1579291205.717:26): pid=9745 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. [ 75.720313][ T27] kauditd_printk_skb: 2 callbacks suppressed [ 75.720324][ T27] audit: type=1800 audit(1579291206.567:29): pid=9745 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 [ 75.747588][ T27] audit: type=1800 audit(1579291206.577:30): pid=9745 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 '10.128.0.139' (ECDSA) to the list of known hosts. 2020/01/17 20:00:18 parsed 1 programs 2020/01/17 20:00:21 executed programs: 0 syzkaller login: [ 90.459493][ T9914] IPVS: ftp: loaded support on port[0] = 21 [ 90.519316][ T9914] chnl_net:caif_netlink_parms(): no params data found [ 90.549133][ T9914] bridge0: port 1(bridge_slave_0) entered blocking state [ 90.556799][ T9914] bridge0: port 1(bridge_slave_0) entered disabled state [ 90.564987][ T9914] device bridge_slave_0 entered promiscuous mode [ 90.573428][ T9914] bridge0: port 2(bridge_slave_1) entered blocking state [ 90.580867][ T9914] bridge0: port 2(bridge_slave_1) entered disabled state [ 90.588705][ T9914] device bridge_slave_1 entered promiscuous mode [ 90.606757][ T9914] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 90.618128][ T9914] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 90.637614][ T9914] team0: Port device team_slave_0 added [ 90.645518][ T9914] team0: Port device team_slave_1 added [ 90.696594][ T9914] device hsr_slave_0 entered promiscuous mode [ 90.744552][ T9914] device hsr_slave_1 entered promiscuous mode [ 90.836048][ T9914] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 90.897282][ T9914] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 90.946510][ T9914] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 91.026854][ T9914] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 91.117092][ T9914] bridge0: port 2(bridge_slave_1) entered blocking state [ 91.124780][ T9914] bridge0: port 2(bridge_slave_1) entered forwarding state [ 91.132552][ T9914] bridge0: port 1(bridge_slave_0) entered blocking state [ 91.139707][ T9914] bridge0: port 1(bridge_slave_0) entered forwarding state [ 91.181615][ T9914] 8021q: adding VLAN 0 to HW filter on device bond0 [ 91.198145][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 91.209344][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 91.218080][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 91.228622][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 91.242905][ T9914] 8021q: adding VLAN 0 to HW filter on device team0 [ 91.253447][ T2680] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 91.263192][ T2680] bridge0: port 1(bridge_slave_0) entered blocking state [ 91.270436][ T2680] bridge0: port 1(bridge_slave_0) entered forwarding state [ 91.282960][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 91.292019][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 91.299150][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 91.325069][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 91.335185][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 91.343686][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 91.352531][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 91.363287][ T2680] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 91.376232][ T9914] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 91.395420][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 91.403220][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 91.418374][ T9914] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 91.437660][ T2680] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 91.458022][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 91.466357][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 91.474389][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 91.486024][ T9914] device veth0_vlan entered promiscuous mode [ 91.498838][ T9914] device veth1_vlan entered promiscuous mode [ 91.517001][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 91.525400][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready 2020/01/17 20:00:26 executed programs: 54 2020/01/17 20:00:31 executed programs: 125 2020/01/17 20:00:36 executed programs: 196 [ 109.340965][T11168] [ 109.343522][T11168] ============================= [ 109.348481][T11168] WARNING: suspicious RCU usage [ 109.353392][T11168] 5.5.0-rc6-syzkaller #0 Not tainted [ 109.358747][T11168] ----------------------------- [ 109.366051][T11168] net/netfilter/ipset/ip_set_core.c:1001 suspicious rcu_dereference_protected() usage! [ 109.375848][T11168] [ 109.375848][T11168] other info that might help us debug this: [ 109.375848][T11168] [ 109.386127][T11168] [ 109.386127][T11168] rcu_scheduler_active = 2, debug_locks = 1 [ 109.394252][T11168] 1 lock held by syz-executor.0/11168: [ 109.399831][T11168] #0: ffff8880944135d8 (nlk_cb_mutex-NETFILTER){+.+.}, at: netlink_dump+0xe7/0xfb0 [ 109.409363][T11168] [ 109.409363][T11168] stack backtrace: [ 109.415310][T11168] CPU: 1 PID: 11168 Comm: syz-executor.0 Not tainted 5.5.0-rc6-syzkaller #0 [ 109.424082][T11168] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 109.434231][T11168] Call Trace: [ 109.437553][T11168] dump_stack+0x197/0x210 [ 109.442143][T11168] lockdep_rcu_suspicious+0x153/0x15d [ 109.447713][T11168] find_set_and_id.isra.0+0x227/0x330 [ 109.453142][T11168] dump_init+0x1c1/0x3b0 [ 109.457427][T11168] ? find_set_and_id.isra.0+0x330/0x330 [ 109.462975][T11168] ? __kasan_check_read+0x11/0x20 [ 109.468094][T11168] ip_set_dump_start+0x9e6/0x1ca0 [ 109.473120][T11168] ? __kmalloc_node_track_caller+0x4e/0x70 [ 109.479311][T11168] ? __phys_addr+0xa4/0x120 [ 109.483809][T11168] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 109.490050][T11168] ? ip_set_rename+0x720/0x720 [ 109.494936][T11168] ? __kmalloc_reserve.isra.0+0xf0/0xf0 [ 109.500493][T11168] ? __kasan_check_write+0x14/0x20 [ 109.505670][T11168] netlink_dump+0x558/0xfb0 [ 109.511100][T11168] ? __netlink_sendskb+0xc0/0xc0 [ 109.516025][T11168] ? kmem_cache_free+0x26b/0x320 [ 109.520957][T11168] ? kfree_skbmem+0x100/0x1c0 [ 109.525665][T11168] ? consume_skb+0x108/0x410 [ 109.530339][T11168] netlink_recvmsg+0xbb4/0xf50 [ 109.535131][T11168] ? netlink_dump+0xfb0/0xfb0 [ 109.539898][T11168] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 109.545554][T11168] ? apparmor_socket_recvmsg+0x2a/0x30 [ 109.551027][T11168] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 109.557302][T11168] ? security_socket_recvmsg+0x95/0xc0 [ 109.571089][T11168] ? netlink_dump+0xfb0/0xfb0 [ 109.575752][T11168] sock_recvmsg+0xce/0x110 [ 109.580242][T11168] __sys_recvfrom+0x1ff/0x350 [ 109.585004][T11168] ? __ia32_sys_send+0x100/0x100 [ 109.589943][T11168] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 109.596224][T11168] ? put_old_timespec32+0x113/0x200 [ 109.601425][T11168] ? get_old_timespec32+0x200/0x200 [ 109.606661][T11168] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 109.613030][T11168] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 109.618595][T11168] ? do_fast_syscall_32+0xd1/0xe16 [ 109.623818][T11168] ? entry_SYSENTER_compat+0x70/0x7f [ 109.629104][T11168] __ia32_compat_sys_recvfrom+0xe5/0x1a0 [ 109.634752][T11168] do_fast_syscall_32+0x27b/0xe16 [ 109.639815][T11168] entry_SYSENTER_compat+0x70/0x7f [ 109.645281][T11168] RIP: 0023:0xf7f62a39 [ 109.649355][T11168] Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 109.668957][T11168] RSP: 002b:00000000f7f5e0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000173 [ 109.677418][T11168] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000 [ 109.685384][T11168] RDX: 00000000c68970de RSI: 0000000000000000 RDI: 0000000000000000 [ 109.693560][T11168] RBP: 0000000000000226 R08: 0000000000000000 R09: 0000000000000000 [ 109.701581][T11168] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 109.709584][T11168] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 2020/01/17 20:00:41 executed programs: 262 2020/01/17 20:00:46 executed programs: 333