[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 76.754737][ T27] audit: type=1800 audit(1578320357.703:25): pid=9106 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 76.786432][ T27] audit: type=1800 audit(1578320357.713:26): pid=9106 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 76.827823][ T27] audit: type=1800 audit(1578320357.713:27): pid=9106 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 '10.128.0.93' (ECDSA) to the list of known hosts. syzkaller login: [ 99.679980][ T9262] IPVS: ftp: loaded support on port[0] = 21 [ 99.739355][ T9262] chnl_net:caif_netlink_parms(): no params data found [ 99.771458][ T9262] bridge0: port 1(bridge_slave_0) entered blocking state [ 99.778977][ T9262] bridge0: port 1(bridge_slave_0) entered disabled state [ 99.787430][ T9262] device bridge_slave_0 entered promiscuous mode [ 99.795566][ T9262] bridge0: port 2(bridge_slave_1) entered blocking state [ 99.802755][ T9262] bridge0: port 2(bridge_slave_1) entered disabled state [ 99.811010][ T9262] device bridge_slave_1 entered promiscuous mode [ 99.830369][ T9262] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 99.841168][ T9262] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 99.861661][ T9262] team0: Port device team_slave_0 added [ 99.868892][ T9262] team0: Port device team_slave_1 added [ 99.918956][ T9262] device hsr_slave_0 entered promiscuous mode [ 99.987013][ T9262] device hsr_slave_1 entered promiscuous mode [ 100.087348][ T9262] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 100.138853][ T9262] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 100.189377][ T9262] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 100.228862][ T9262] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 100.306466][ T9262] bridge0: port 2(bridge_slave_1) entered blocking state [ 100.313634][ T9262] bridge0: port 2(bridge_slave_1) entered forwarding state [ 100.321316][ T9262] bridge0: port 1(bridge_slave_0) entered blocking state [ 100.328420][ T9262] bridge0: port 1(bridge_slave_0) entered forwarding state [ 100.366853][ T9262] 8021q: adding VLAN 0 to HW filter on device bond0 [ 100.380998][ T2760] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 100.391168][ T2760] bridge0: port 1(bridge_slave_0) entered disabled state [ 100.399749][ T2760] bridge0: port 2(bridge_slave_1) entered disabled state [ 100.408026][ T2760] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 100.420704][ T9262] 8021q: adding VLAN 0 to HW filter on device team0 [ 100.431134][ T2736] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 100.440712][ T2736] bridge0: port 1(bridge_slave_0) entered blocking state [ 100.447814][ T2736] bridge0: port 1(bridge_slave_0) entered forwarding state [ 100.467783][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 100.476103][ T3099] bridge0: port 2(bridge_slave_1) entered blocking state [ 100.483462][ T3099] bridge0: port 2(bridge_slave_1) entered forwarding state [ 100.491441][ T3099] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 100.501756][ T2760] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 100.512325][ T2736] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 100.528812][ T9262] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 100.540290][ T9262] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 100.552777][ T2760] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 100.561291][ T2760] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 100.569755][ T2760] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 100.585871][ T2736] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 100.593379][ T2736] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 100.605261][ T9262] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 100.624333][ T2760] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 100.643064][ T2736] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 100.652027][ T2736] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 100.660087][ T2736] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 100.670336][ T9262] device veth0_vlan entered promiscuous mode [ 100.681671][ T9262] device veth1_vlan entered promiscuous mode [ 100.727374][ T2736] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 100.735301][ T2736] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 100.746960][ T9262] ================================================================== [ 100.755147][ T9262] BUG: KASAN: slab-out-of-bounds in macvlan_broadcast+0x547/0x620 [ 100.762974][ T9262] Read of size 4 at addr ffff8880956c7401 by task syz-executor265/9262 [ 100.771184][ T9262] [ 100.773495][ T9262] CPU: 1 PID: 9262 Comm: syz-executor265 Not tainted 5.5.0-rc4-syzkaller #0 [ 100.782137][ T9262] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.792167][ T9262] Call Trace: [ 100.795436][ T9262] dump_stack+0x197/0x210 [ 100.799745][ T9262] ? macvlan_broadcast+0x547/0x620 [ 100.804838][ T9262] print_address_description.constprop.0.cold+0xd4/0x30b [ 100.811839][ T9262] ? macvlan_broadcast+0x547/0x620 [ 100.816929][ T9262] ? macvlan_broadcast+0x547/0x620 [ 100.822017][ T9262] __kasan_report.cold+0x1b/0x41 [ 100.826942][ T9262] ? validate_xmit_xfrm+0x3d0/0xf10 [ 100.832125][ T9262] ? macvlan_broadcast+0x547/0x620 [ 100.837215][ T9262] kasan_report+0x12/0x20 [ 100.841525][ T9262] __asan_report_load_n_noabort+0xf/0x20 [ 100.847143][ T9262] macvlan_broadcast+0x547/0x620 [ 100.852069][ T9262] ? validate_xmit_skb+0x81f/0xe50 [ 100.857167][ T9262] macvlan_start_xmit+0x402/0x77f [ 100.862170][ T9262] dev_direct_xmit+0x419/0x630 [ 100.866922][ T9262] ? cache_grow_begin.cold+0x2e/0x2f [ 100.872203][ T9262] ? validate_xmit_skb_list+0x150/0x150 [ 100.877724][ T9262] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 100.883938][ T9262] ? netdev_pick_tx+0x14e/0xb00 [ 100.888773][ T9262] packet_direct_xmit+0x1a9/0x250 [ 100.893774][ T9262] packet_sendmsg+0x260d/0x6220 [ 100.898609][ T9262] ? ___might_sleep+0x163/0x2c0 [ 100.903437][ T9262] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 100.909659][ T9262] ? aa_label_sk_perm+0x91/0xf0 [ 100.914498][ T9262] ? packet_notifier+0x880/0x880 [ 100.919413][ T9262] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 100.924935][ T9262] ? apparmor_socket_sendmsg+0x2a/0x30 [ 100.930372][ T9262] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 100.936610][ T9262] ? security_socket_sendmsg+0x8d/0xc0 [ 100.942057][ T9262] ? packet_notifier+0x880/0x880 [ 100.946983][ T9262] sock_sendmsg+0xd7/0x130 [ 100.951393][ T9262] __sys_sendto+0x262/0x380 [ 100.955875][ T9262] ? __ia32_sys_getpeername+0xb0/0xb0 [ 100.961235][ T9262] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 100.967383][ T9262] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 100.972917][ T9262] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 100.978876][ T9262] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 100.984323][ T9262] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 100.989761][ T9262] ? do_syscall_64+0x26/0x790 [ 100.994412][ T9262] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.000469][ T9262] __x64_sys_sendto+0xe1/0x1a0 [ 101.005212][ T9262] do_syscall_64+0xfa/0x790 [ 101.009698][ T9262] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.015565][ T9262] RIP: 0033:0x442529 [ 101.019444][ T9262] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 5b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 101.039029][ T9262] RSP: 002b:00007ffeb4bb45a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 101.047421][ T9262] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442529 [ 101.055369][ T9262] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 101.063327][ T9262] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 101.071276][ T9262] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 101.079226][ T9262] R13: 0000000000403aa0 R14: 0000000000000000 R15: 0000000000000000 [ 101.087197][ T9262] [ 101.089513][ T9262] Allocated by task 9110: [ 101.093822][ T9262] save_stack+0x23/0x90 [ 101.097953][ T9262] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 101.103558][ T9262] kasan_slab_alloc+0xf/0x20 [ 101.108124][ T9262] kmem_cache_alloc+0x121/0x710 [ 101.112960][ T9262] getname_flags+0xd6/0x5b0 [ 101.117445][ T9262] user_path_at_empty+0x2f/0x50 [ 101.122271][ T9262] do_faccessat+0x262/0x7f0 [ 101.126758][ T9262] __x64_sys_access+0x59/0x80 [ 101.131423][ T9262] do_syscall_64+0xfa/0x790 [ 101.135917][ T9262] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.141791][ T9262] [ 101.144097][ T9262] Freed by task 9110: [ 101.148060][ T9262] save_stack+0x23/0x90 [ 101.152193][ T9262] __kasan_slab_free+0x102/0x150 [ 101.157107][ T9262] kasan_slab_free+0xe/0x10 [ 101.161586][ T9262] kmem_cache_free+0x86/0x320 [ 101.166245][ T9262] putname+0xef/0x130 [ 101.170210][ T9262] filename_lookup+0x28f/0x3f0 [ 101.174957][ T9262] user_path_at_empty+0x43/0x50 [ 101.179787][ T9262] do_faccessat+0x262/0x7f0 [ 101.184267][ T9262] __x64_sys_access+0x59/0x80 [ 101.188926][ T9262] do_syscall_64+0xfa/0x790 [ 101.193407][ T9262] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.199273][ T9262] [ 101.201582][ T9262] The buggy address belongs to the object at ffff8880956c6180 [ 101.201582][ T9262] which belongs to the cache names_cache of size 4096 [ 101.215706][ T9262] The buggy address is located 641 bytes to the right of [ 101.215706][ T9262] 4096-byte region [ffff8880956c6180, ffff8880956c7180) [ 101.229561][ T9262] The buggy address belongs to the page: [ 101.235172][ T9262] page:ffffea000255b180 refcount:1 mapcount:0 mapping:ffff8880aa5fda80 index:0x0 compound_mapcount: 0 [ 101.246096][ T9262] raw: 00fffe0000010200 ffffea000248e208 ffffea000248e288 ffff8880aa5fda80 [ 101.254662][ T9262] raw: 0000000000000000 ffff8880956c6180 0000000100000001 0000000000000000 [ 101.263223][ T9262] page dumped because: kasan: bad access detected [ 101.269653][ T9262] [ 101.271958][ T9262] Memory state around the buggy address: [ 101.277564][ T9262] ffff8880956c7300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 101.285603][ T9262] ffff8880956c7380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 101.293644][ T9262] >ffff8880956c7400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 101.301680][ T9262] ^ [ 101.305723][ T9262] ffff8880956c7480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 101.313760][ T9262] ffff8880956c7500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 101.321792][ T9262] ================================================================== [ 101.329857][ T9262] Disabling lock debugging due to kernel taint [ 101.336078][ T9262] Kernel panic - not syncing: panic_on_warn set ... [ 101.342681][ T9262] CPU: 1 PID: 9262 Comm: syz-executor265 Tainted: G B 5.5.0-rc4-syzkaller #0 [ 101.352735][ T9262] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 101.362766][ T9262] Call Trace: [ 101.366041][ T9262] dump_stack+0x197/0x210 [ 101.370350][ T9262] panic+0x2e3/0x75c [ 101.374220][ T9262] ? add_taint.cold+0x16/0x16 [ 101.378902][ T9262] ? trace_hardirqs_on+0x5e/0x240 [ 101.383903][ T9262] ? trace_hardirqs_on+0x5e/0x240 [ 101.388906][ T9262] ? macvlan_broadcast+0x547/0x620 [ 101.393993][ T9262] end_report+0x47/0x4f [ 101.398126][ T9262] ? macvlan_broadcast+0x547/0x620 [ 101.403215][ T9262] __kasan_report.cold+0xe/0x41 [ 101.408067][ T9262] ? validate_xmit_xfrm+0x3d0/0xf10 [ 101.413249][ T9262] ? macvlan_broadcast+0x547/0x620 [ 101.418339][ T9262] kasan_report+0x12/0x20 [ 101.422648][ T9262] __asan_report_load_n_noabort+0xf/0x20 [ 101.428256][ T9262] macvlan_broadcast+0x547/0x620 [ 101.433181][ T9262] ? validate_xmit_skb+0x81f/0xe50 [ 101.438273][ T9262] macvlan_start_xmit+0x402/0x77f [ 101.443273][ T9262] dev_direct_xmit+0x419/0x630 [ 101.448019][ T9262] ? cache_grow_begin.cold+0x2e/0x2f [ 101.453286][ T9262] ? validate_xmit_skb_list+0x150/0x150 [ 101.458812][ T9262] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 101.465064][ T9262] ? netdev_pick_tx+0x14e/0xb00 [ 101.469897][ T9262] packet_direct_xmit+0x1a9/0x250 [ 101.474898][ T9262] packet_sendmsg+0x260d/0x6220 [ 101.479726][ T9262] ? ___might_sleep+0x163/0x2c0 [ 101.484554][ T9262] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 101.490771][ T9262] ? aa_label_sk_perm+0x91/0xf0 [ 101.495600][ T9262] ? packet_notifier+0x880/0x880 [ 101.500513][ T9262] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 101.506032][ T9262] ? apparmor_socket_sendmsg+0x2a/0x30 [ 101.511473][ T9262] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 101.517743][ T9262] ? security_socket_sendmsg+0x8d/0xc0 [ 101.523219][ T9262] ? packet_notifier+0x880/0x880 [ 101.528133][ T9262] sock_sendmsg+0xd7/0x130 [ 101.532526][ T9262] __sys_sendto+0x262/0x380 [ 101.537002][ T9262] ? __ia32_sys_getpeername+0xb0/0xb0 [ 101.542353][ T9262] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 101.548480][ T9262] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 101.554004][ T9262] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 101.559963][ T9262] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 101.565398][ T9262] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 101.570833][ T9262] ? do_syscall_64+0x26/0x790 [ 101.575488][ T9262] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.581531][ T9262] __x64_sys_sendto+0xe1/0x1a0 [ 101.586273][ T9262] do_syscall_64+0xfa/0x790 [ 101.590752][ T9262] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.596617][ T9262] RIP: 0033:0x442529 [ 101.600491][ T9262] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 5b 10 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 101.620083][ T9262] RSP: 002b:00007ffeb4bb45a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 101.628469][ T9262] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442529 [ 101.636416][ T9262] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 101.644384][ T9262] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 101.652332][ T9262] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 101.660278][ T9262] R13: 0000000000403aa0 R14: 0000000000000000 R15: 0000000000000000 [ 101.669434][ T9262] Kernel Offset: disabled [ 101.673750][ T9262] Rebooting in 86400 seconds..