[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 75.233106][ T27] audit: type=1800 audit(1579299656.538:25): pid=9245 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 75.252938][ T27] audit: type=1800 audit(1579299656.538:26): pid=9245 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 75.297395][ T27] audit: type=1800 audit(1579299656.538:27): pid=9245 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.41' (ECDSA) to the list of known hosts. 2020/01/17 22:21:29 parsed 1 programs 2020/01/17 22:21:30 executed programs: 0 syzkaller login: [ 109.330990][ T9413] IPVS: ftp: loaded support on port[0] = 21 [ 109.390008][ T9413] chnl_net:caif_netlink_parms(): no params data found [ 109.416079][ T9413] bridge0: port 1(bridge_slave_0) entered blocking state [ 109.424385][ T9413] bridge0: port 1(bridge_slave_0) entered disabled state [ 109.432840][ T9413] device bridge_slave_0 entered promiscuous mode [ 109.441945][ T9413] bridge0: port 2(bridge_slave_1) entered blocking state [ 109.449138][ T9413] bridge0: port 2(bridge_slave_1) entered disabled state [ 109.456713][ T9413] device bridge_slave_1 entered promiscuous mode [ 109.474099][ T9413] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 109.485333][ T9413] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 109.504712][ T9413] team0: Port device team_slave_0 added [ 109.512032][ T9413] team0: Port device team_slave_1 added [ 109.599299][ T9413] device hsr_slave_0 entered promiscuous mode [ 109.677611][ T9413] device hsr_slave_1 entered promiscuous mode [ 109.777570][ T9413] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 109.830361][ T9413] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 109.889846][ T9413] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 109.949948][ T9413] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 110.019707][ T9413] bridge0: port 2(bridge_slave_1) entered blocking state [ 110.027240][ T9413] bridge0: port 2(bridge_slave_1) entered forwarding state [ 110.035200][ T9413] bridge0: port 1(bridge_slave_0) entered blocking state [ 110.042383][ T9413] bridge0: port 1(bridge_slave_0) entered forwarding state [ 110.087570][ T9413] 8021q: adding VLAN 0 to HW filter on device bond0 [ 110.100558][ T2740] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 110.111032][ T2740] bridge0: port 1(bridge_slave_0) entered disabled state [ 110.119236][ T2740] bridge0: port 2(bridge_slave_1) entered disabled state [ 110.127051][ T2740] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 110.143292][ T9413] 8021q: adding VLAN 0 to HW filter on device team0 [ 110.153311][ T2848] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 110.162892][ T2848] bridge0: port 1(bridge_slave_0) entered blocking state [ 110.170027][ T2848] bridge0: port 1(bridge_slave_0) entered forwarding state [ 110.188664][ T2735] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 110.197045][ T2735] bridge0: port 2(bridge_slave_1) entered blocking state [ 110.204169][ T2735] bridge0: port 2(bridge_slave_1) entered forwarding state [ 110.215951][ T2848] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 110.225697][ T2848] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 110.244291][ T9413] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 110.255629][ T9413] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 110.269135][ T2850] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 110.277985][ T2850] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 110.286480][ T2850] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 110.295667][ T2850] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 110.313311][ T2735] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 110.320821][ T2735] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 110.334301][ T9413] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 110.353139][ T2850] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 110.372910][ T2735] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 110.381650][ T2735] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 110.389699][ T2735] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 110.401613][ T9413] device veth0_vlan entered promiscuous mode [ 110.412669][ T9413] device veth1_vlan entered promiscuous mode 2020/01/17 22:21:35 executed programs: 56 2020/01/17 22:21:40 executed programs: 130 [ 121.433694][T10217] [ 121.436150][T10217] ============================= [ 121.441251][T10217] WARNING: suspicious RCU usage [ 121.446098][T10217] 5.5.0-rc5-syzkaller #0 Not tainted [ 121.451437][T10217] ----------------------------- [ 121.456305][T10217] net/netfilter/ipset/ip_set_core.c:1001 suspicious rcu_dereference_protected() usage! [ 121.466046][T10217] [ 121.466046][T10217] other info that might help us debug this: [ 121.466046][T10217] [ 121.476364][T10217] [ 121.476364][T10217] rcu_scheduler_active = 2, debug_locks = 1 [ 121.484499][T10217] 1 lock held by syz-executor.0/10217: [ 121.490005][T10217] #0: ffff8880906175d8 (nlk_cb_mutex-NETFILTER){+.+.}, at: netlink_dump+0xe7/0xfb0 [ 121.499464][T10217] [ 121.499464][T10217] stack backtrace: [ 121.505355][T10217] CPU: 1 PID: 10217 Comm: syz-executor.0 Not tainted 5.5.0-rc5-syzkaller #0 [ 121.513998][T10217] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.524036][T10217] Call Trace: [ 121.527325][T10217] dump_stack+0x197/0x210 [ 121.531803][T10217] lockdep_rcu_suspicious+0x153/0x15d [ 121.537161][T10217] find_set_and_id.isra.0+0x227/0x330 [ 121.542515][T10217] dump_init+0x1c1/0x3b0 [ 121.546736][T10217] ? find_set_and_id.isra.0+0x330/0x330 [ 121.552269][T10217] ? __kasan_check_read+0x11/0x20 [ 121.557276][T10217] ip_set_dump_start+0x9e6/0x1ca0 [ 121.562327][T10217] ? __kmalloc_node_track_caller+0x4e/0x70 [ 121.568119][T10217] ? __phys_addr+0xa4/0x120 [ 121.572627][T10217] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 121.578876][T10217] ? ip_set_rename+0x720/0x720 [ 121.583632][T10217] ? __kmalloc_reserve.isra.0+0xf0/0xf0 [ 121.589184][T10217] ? __kasan_check_write+0x14/0x20 [ 121.594297][T10217] netlink_dump+0x558/0xfb0 [ 121.598782][T10217] ? __netlink_sendskb+0xc0/0xc0 [ 121.603697][T10217] ? kmem_cache_free+0x26b/0x320 [ 121.608643][T10217] ? kfree_skbmem+0x100/0x1c0 [ 121.613296][T10217] ? consume_skb+0x108/0x410 [ 121.617865][T10217] netlink_recvmsg+0xbb4/0xf50 [ 121.622605][T10217] ? netlink_dump+0xfb0/0xfb0 [ 121.627262][T10217] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 121.632789][T10217] ? apparmor_socket_recvmsg+0x2a/0x30 [ 121.638237][T10217] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 121.644488][T10217] ? security_socket_recvmsg+0x95/0xc0 [ 121.650057][T10217] ? netlink_dump+0xfb0/0xfb0 [ 121.654721][T10217] sock_recvmsg+0xce/0x110 [ 121.659162][T10217] __sys_recvfrom+0x1ff/0x350 [ 121.663828][T10217] ? __ia32_sys_send+0x100/0x100 [ 121.668760][T10217] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 121.674985][T10217] ? put_timespec64+0xda/0x140 [ 121.679731][T10217] ? ns_to_kernel_old_timeval+0x100/0x100 [ 121.685445][T10217] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 121.690902][T10217] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 121.696367][T10217] ? do_syscall_64+0x26/0x790 [ 121.701077][T10217] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 121.707132][T10217] __x64_sys_recvfrom+0xe1/0x1a0 [ 121.712060][T10217] do_syscall_64+0xfa/0x790 [ 121.716548][T10217] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 121.722419][T10217] RIP: 0033:0x45aff9 [ 121.726297][T10217] 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 [ 121.745893][T10217] RSP: 002b:00007f6e8c30bc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002d [ 121.754294][T10217] RAX: ffffffffffffffda RBX: 00007f6e8c30c6d4 RCX: 000000000045aff9 [ 121.762252][T10217] RDX: 36ff0824c68970de RSI: 0000000000000000 RDI: 0000000000000003 [ 121.770342][T10217] RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000226 [ 121.778353][T10217] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 121.786310][T10217] R13: 000000000000085c R14: 00000000004c9852 R15: 000000000075bf2c 2020/01/17 22:21:45 executed programs: 200 2020/01/17 22:21:50 executed programs: 276