[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.655567][ T27] audit: type=1800 audit(1578339497.310:25): pid=9372 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 85.688353][ T27] audit: type=1800 audit(1578339497.310:26): pid=9372 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 85.729232][ T27] audit: type=1800 audit(1578339497.310:27): pid=9372 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 '10.128.0.111' (ECDSA) to the list of known hosts. syzkaller login: [ 98.160914][ T9525] IPVS: ftp: loaded support on port[0] = 21 [ 98.223208][ T9525] chnl_net:caif_netlink_parms(): no params data found [ 98.256854][ T9525] bridge0: port 1(bridge_slave_0) entered blocking state [ 98.264771][ T9525] bridge0: port 1(bridge_slave_0) entered disabled state [ 98.273010][ T9525] device bridge_slave_0 entered promiscuous mode [ 98.281470][ T9525] bridge0: port 2(bridge_slave_1) entered blocking state [ 98.288786][ T9525] bridge0: port 2(bridge_slave_1) entered disabled state [ 98.296725][ T9525] device bridge_slave_1 entered promiscuous mode [ 98.315086][ T9525] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 98.326518][ T9525] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 98.346594][ T9525] team0: Port device team_slave_0 added [ 98.354567][ T9525] team0: Port device team_slave_1 added [ 98.420495][ T9525] device hsr_slave_0 entered promiscuous mode [ 98.468599][ T9525] device hsr_slave_1 entered promiscuous mode [ 98.560879][ T9525] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 98.611515][ T9525] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 98.660326][ T9525] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 98.711968][ T9525] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 98.779754][ T9525] bridge0: port 2(bridge_slave_1) entered blocking state [ 98.786903][ T9525] bridge0: port 2(bridge_slave_1) entered forwarding state [ 98.794726][ T9525] bridge0: port 1(bridge_slave_0) entered blocking state [ 98.802064][ T9525] bridge0: port 1(bridge_slave_0) entered forwarding state [ 98.842969][ T9525] 8021q: adding VLAN 0 to HW filter on device bond0 [ 98.855149][ T2803] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 98.865686][ T2803] bridge0: port 1(bridge_slave_0) entered disabled state [ 98.874078][ T2803] bridge0: port 2(bridge_slave_1) entered disabled state [ 98.882392][ T2803] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 98.894681][ T9525] 8021q: adding VLAN 0 to HW filter on device team0 [ 98.905239][ T3235] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 98.914117][ T3235] bridge0: port 1(bridge_slave_0) entered blocking state [ 98.921255][ T3235] bridge0: port 1(bridge_slave_0) entered forwarding state [ 98.932778][ T2803] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 98.941554][ T2803] bridge0: port 2(bridge_slave_1) entered blocking state [ 98.948643][ T2803] bridge0: port 2(bridge_slave_1) entered forwarding state [ 98.971005][ T2803] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 98.980191][ T2803] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 98.989346][ T2803] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 98.999417][ T3235] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 99.013835][ T9525] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 99.025456][ T9525] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 99.033698][ T2803] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 99.053077][ T3235] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 99.060615][ T3235] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 99.073323][ T9525] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 99.093093][ T2803] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready executing program [ 99.111965][ T3235] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 99.121608][ T3235] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 99.129616][ T3235] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 99.141811][ T9525] device veth0_vlan entered promiscuous mode [ 99.153421][ T9525] device veth1_vlan entered promiscuous mode [ 99.199204][ T9527] ================================================================== [ 99.207499][ T9527] BUG: KASAN: use-after-free in macvlan_broadcast+0x547/0x620 [ 99.209118][ T3235] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 99.214958][ T9527] Read of size 4 at addr ffff888094a0f001 by task syz-executor370/9527 [ 99.223080][ T3235] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 99.230608][ T9527] [ 99.230626][ T9527] CPU: 0 PID: 9527 Comm: syz-executor370 Not tainted 5.5.0-rc4-syzkaller #0 [ 99.230634][ T9527] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.230639][ T9527] Call Trace: [ 99.230660][ T9527] dump_stack+0x197/0x210 [ 99.230678][ T9527] ? macvlan_broadcast+0x547/0x620 [ 99.230698][ T9527] print_address_description.constprop.0.cold+0xd4/0x30b [ 99.230712][ T9527] ? macvlan_broadcast+0x547/0x620 [ 99.230727][ T9527] ? macvlan_broadcast+0x547/0x620 [ 99.230739][ T9527] __kasan_report.cold+0x1b/0x41 [ 99.230760][ T9527] ? validate_xmit_xfrm+0x3e0/0xf10 [ 99.300776][ T9527] ? macvlan_broadcast+0x547/0x620 [ 99.306393][ T9527] kasan_report+0x12/0x20 [ 99.310718][ T9527] __asan_report_load_n_noabort+0xf/0x20 [ 99.316372][ T9527] macvlan_broadcast+0x547/0x620 [ 99.321312][ T9527] ? validate_xmit_skb+0x81f/0xe50 [ 99.326458][ T9527] macvlan_start_xmit+0x402/0x77f [ 99.331631][ T9527] dev_direct_xmit+0x419/0x630 [ 99.336384][ T9527] ? __check_heap_object+0x61/0xb3 [ 99.341491][ T9527] ? validate_xmit_skb_list+0x150/0x150 [ 99.347024][ T9527] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 99.353257][ T9527] ? netdev_pick_tx+0x14e/0xb00 [ 99.358146][ T9527] packet_direct_xmit+0x1a9/0x250 [ 99.363175][ T9527] packet_sendmsg+0x260d/0x6220 [ 99.368027][ T9527] ? ___might_sleep+0x163/0x2c0 [ 99.372913][ T9527] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 99.379266][ T9527] ? aa_label_sk_perm+0x91/0xf0 [ 99.384110][ T9527] ? packet_notifier+0x880/0x880 [ 99.389311][ T9527] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 99.394849][ T9527] ? apparmor_socket_sendmsg+0x2a/0x30 [ 99.400301][ T9527] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.406521][ T9527] ? security_socket_sendmsg+0x8d/0xc0 [ 99.411984][ T9527] ? packet_notifier+0x880/0x880 [ 99.416901][ T9527] sock_sendmsg+0xd7/0x130 [ 99.421304][ T9527] __sys_sendto+0x262/0x380 [ 99.425800][ T9527] ? __ia32_sys_getpeername+0xb0/0xb0 [ 99.431163][ T9527] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 99.437320][ T9527] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 99.442844][ T9527] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 99.448811][ T9527] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 99.454600][ T9527] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 99.460047][ T9527] ? do_syscall_64+0x26/0x790 [ 99.464703][ T9527] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.470860][ T9527] __x64_sys_sendto+0xe1/0x1a0 [ 99.475623][ T9527] do_syscall_64+0xfa/0x790 [ 99.480303][ T9527] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.486180][ T9527] RIP: 0033:0x442da9 [ 99.490057][ T9527] Code: e8 ac 07 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 1b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 99.509648][ T9527] RSP: 002b:00007ffe76b4ee78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 99.518058][ T9527] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442da9 [ 99.527325][ T9527] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 99.535283][ T9527] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 99.545409][ T9527] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 99.553451][ T9527] R13: 0000000000403ce0 R14: 0000000000000000 R15: 0000000000000000 [ 99.561412][ T9527] [ 99.563723][ T9527] Allocated by task 9516: [ 99.568485][ T9527] save_stack+0x23/0x90 [ 99.572616][ T9527] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 99.578238][ T9527] kasan_slab_alloc+0xf/0x20 [ 99.583343][ T9527] kmem_cache_alloc+0x121/0x710 [ 99.588197][ T9527] getname_flags+0xd6/0x5b0 [ 99.592709][ T9527] getname+0x1a/0x20 [ 99.596589][ T9527] do_sys_open+0x2c9/0x5d0 [ 99.600998][ T9527] __x64_sys_open+0x7e/0xc0 [ 99.605487][ T9527] do_syscall_64+0xfa/0x790 [ 99.609978][ T9527] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.615869][ T9527] [ 99.618181][ T9527] Freed by task 9516: [ 99.622225][ T9527] save_stack+0x23/0x90 [ 99.626376][ T9527] __kasan_slab_free+0x102/0x150 [ 99.631306][ T9527] kasan_slab_free+0xe/0x10 [ 99.636230][ T9527] kmem_cache_free+0x86/0x320 [ 99.640890][ T9527] putname+0xef/0x130 [ 99.644851][ T9527] do_sys_open+0x318/0x5d0 [ 99.649254][ T9527] __x64_sys_open+0x7e/0xc0 [ 99.653736][ T9527] do_syscall_64+0xfa/0x790 [ 99.658229][ T9527] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 99.664093][ T9527] [ 99.666415][ T9527] The buggy address belongs to the object at ffff888094a0e600 [ 99.666415][ T9527] which belongs to the cache names_cache of size 4096 [ 99.680896][ T9527] The buggy address is located 2561 bytes inside of [ 99.680896][ T9527] 4096-byte region [ffff888094a0e600, ffff888094a0f600) [ 99.694511][ T9527] The buggy address belongs to the page: [ 99.700263][ T9527] page:ffffea0002528380 refcount:1 mapcount:0 mapping:ffff8880aa5fda80 index:0x0 compound_mapcount: 0 [ 99.711201][ T9527] raw: 00fffe0000010200 ffffea00024c4988 ffffea00022c4188 ffff8880aa5fda80 [ 99.719773][ T9527] raw: 0000000000000000 ffff888094a0e600 0000000100000001 0000000000000000 [ 99.728366][ T9527] page dumped because: kasan: bad access detected [ 99.734754][ T9527] [ 99.737058][ T9527] Memory state around the buggy address: [ 99.742678][ T9527] ffff888094a0ef00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 99.750738][ T9527] ffff888094a0ef80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 99.758794][ T9527] >ffff888094a0f000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 99.767108][ T9527] ^ [ 99.771188][ T9527] ffff888094a0f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 99.779246][ T9527] ffff888094a0f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 99.787307][ T9527] ================================================================== [ 99.795345][ T9527] Disabling lock debugging due to kernel taint [ 99.801540][ T9527] Kernel panic - not syncing: panic_on_warn set ... [ 99.808123][ T9527] CPU: 0 PID: 9527 Comm: syz-executor370 Tainted: G B 5.5.0-rc4-syzkaller #0 [ 99.818435][ T9527] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 99.828486][ T9527] Call Trace: [ 99.831788][ T9527] dump_stack+0x197/0x210 [ 99.836139][ T9527] panic+0x2e3/0x75c [ 99.840043][ T9527] ? add_taint.cold+0x16/0x16 [ 99.844705][ T9527] ? trace_hardirqs_on+0x5e/0x240 [ 99.849728][ T9527] ? trace_hardirqs_on+0x5e/0x240 [ 99.854738][ T9527] ? macvlan_broadcast+0x547/0x620 [ 99.860959][ T9527] end_report+0x47/0x4f [ 99.865193][ T9527] ? macvlan_broadcast+0x547/0x620 [ 99.872041][ T9527] __kasan_report.cold+0xe/0x41 [ 99.876885][ T9527] ? validate_xmit_xfrm+0x3e0/0xf10 [ 99.882094][ T9527] ? macvlan_broadcast+0x547/0x620 [ 99.887224][ T9527] kasan_report+0x12/0x20 [ 99.891563][ T9527] __asan_report_load_n_noabort+0xf/0x20 [ 99.897191][ T9527] macvlan_broadcast+0x547/0x620 [ 99.902142][ T9527] ? validate_xmit_skb+0x81f/0xe50 [ 99.907247][ T9527] macvlan_start_xmit+0x402/0x77f [ 99.912263][ T9527] dev_direct_xmit+0x419/0x630 [ 99.917020][ T9527] ? __check_heap_object+0x61/0xb3 [ 99.922121][ T9527] ? validate_xmit_skb_list+0x150/0x150 [ 99.927648][ T9527] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 99.933894][ T9527] ? netdev_pick_tx+0x14e/0xb00 [ 99.938737][ T9527] packet_direct_xmit+0x1a9/0x250 [ 99.943757][ T9527] packet_sendmsg+0x260d/0x6220 [ 99.948592][ T9527] ? ___might_sleep+0x163/0x2c0 [ 99.953541][ T9527] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 99.959765][ T9527] ? aa_label_sk_perm+0x91/0xf0 [ 99.964607][ T9527] ? packet_notifier+0x880/0x880 [ 99.969575][ T9527] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 99.975107][ T9527] ? apparmor_socket_sendmsg+0x2a/0x30 [ 99.980657][ T9527] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 99.986884][ T9527] ? security_socket_sendmsg+0x8d/0xc0 [ 99.992335][ T9527] ? packet_notifier+0x880/0x880 [ 99.997271][ T9527] sock_sendmsg+0xd7/0x130 [ 100.001669][ T9527] __sys_sendto+0x262/0x380 [ 100.006153][ T9527] ? __ia32_sys_getpeername+0xb0/0xb0 [ 100.011529][ T9527] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 100.017675][ T9527] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 100.023219][ T9527] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 100.029284][ T9527] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 100.035358][ T9527] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 100.040804][ T9527] ? do_syscall_64+0x26/0x790 [ 100.045464][ T9527] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 100.051521][ T9527] __x64_sys_sendto+0xe1/0x1a0 [ 100.056277][ T9527] do_syscall_64+0xfa/0x790 [ 100.060778][ T9527] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 100.066649][ T9527] RIP: 0033:0x442da9 [ 100.070706][ T9527] Code: e8 ac 07 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 1b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 100.090918][ T9527] RSP: 002b:00007ffe76b4ee78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 100.099412][ T9527] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442da9 [ 100.107459][ T9527] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 100.115417][ T9527] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 100.123388][ T9527] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 100.131339][ T9527] R13: 0000000000403ce0 R14: 0000000000000000 R15: 0000000000000000 [ 100.140750][ T9527] Kernel Offset: disabled [ 100.145076][ T9527] Rebooting in 86400 seconds..