[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 81.896464][ T27] audit: type=1800 audit(1578358104.221:25): pid=9344 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 81.916285][ T27] audit: type=1800 audit(1578358104.231:26): pid=9344 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 81.939405][ T27] audit: type=1800 audit(1578358104.231:27): pid=9344 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 '10.128.0.180' (ECDSA) to the list of known hosts. 2020/01/07 00:48:34 parsed 1 programs 2020/01/07 00:48:36 executed programs: 0 syzkaller login: [ 94.552403][ T9516] IPVS: ftp: loaded support on port[0] = 21 [ 94.618963][ T9516] chnl_net:caif_netlink_parms(): no params data found [ 94.650232][ T9516] bridge0: port 1(bridge_slave_0) entered blocking state [ 94.657755][ T9516] bridge0: port 1(bridge_slave_0) entered disabled state [ 94.667526][ T9516] device bridge_slave_0 entered promiscuous mode [ 94.676097][ T9516] bridge0: port 2(bridge_slave_1) entered blocking state [ 94.684007][ T9516] bridge0: port 2(bridge_slave_1) entered disabled state [ 94.692225][ T9516] device bridge_slave_1 entered promiscuous mode [ 94.711216][ T9516] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 94.723071][ T9516] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 94.744001][ T9516] team0: Port device team_slave_0 added [ 94.751311][ T9516] team0: Port device team_slave_1 added [ 94.801238][ T9516] device hsr_slave_0 entered promiscuous mode [ 94.859458][ T9516] device hsr_slave_1 entered promiscuous mode [ 94.975265][ T9516] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 95.031554][ T9516] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 95.071340][ T9516] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 95.111729][ T9516] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 95.171805][ T9516] bridge0: port 2(bridge_slave_1) entered blocking state [ 95.178948][ T9516] bridge0: port 2(bridge_slave_1) entered forwarding state [ 95.186832][ T9516] bridge0: port 1(bridge_slave_0) entered blocking state [ 95.194041][ T9516] bridge0: port 1(bridge_slave_0) entered forwarding state [ 95.234902][ T9516] 8021q: adding VLAN 0 to HW filter on device bond0 [ 95.248228][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 95.257918][ T2866] bridge0: port 1(bridge_slave_0) entered disabled state [ 95.267118][ T2866] bridge0: port 2(bridge_slave_1) entered disabled state [ 95.275212][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 95.288684][ T9516] 8021q: adding VLAN 0 to HW filter on device team0 [ 95.299775][ T2869] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 95.308198][ T2869] bridge0: port 1(bridge_slave_0) entered blocking state [ 95.316746][ T2869] bridge0: port 1(bridge_slave_0) entered forwarding state [ 95.328288][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 95.337999][ T2866] bridge0: port 2(bridge_slave_1) entered blocking state [ 95.345132][ T2866] bridge0: port 2(bridge_slave_1) entered forwarding state [ 95.371156][ T2869] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 95.380804][ T2869] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 95.389790][ T2869] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 95.398482][ T2869] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 95.411432][ T9516] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 95.423539][ T9516] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 95.431627][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 95.454911][ T9516] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 95.463172][ T2701] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 95.470713][ T2701] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 95.488748][ T2866] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 95.508412][ T2701] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 95.517225][ T2701] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 95.525077][ T2701] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 95.535184][ T9516] device veth0_vlan entered promiscuous mode [ 95.547832][ T9516] device veth1_vlan entered promiscuous mode [ 95.620927][ T2701] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 95.629558][ T2701] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 95.769527][ T9518] ================================================================== [ 95.777935][ T9518] BUG: KASAN: slab-out-of-bounds in macvlan_broadcast+0x547/0x620 [ 95.785742][ T9518] Read of size 4 at addr ffff888095d1b801 by task syz-executor.0/9518 [ 95.793886][ T9518] [ 95.796201][ T9518] CPU: 1 PID: 9518 Comm: syz-executor.0 Not tainted 5.5.0-rc5-syzkaller #0 [ 95.804764][ T9518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 95.814801][ T9518] Call Trace: [ 95.818078][ T9518] dump_stack+0x197/0x210 [ 95.822403][ T9518] ? macvlan_broadcast+0x547/0x620 [ 95.827516][ T9518] print_address_description.constprop.0.cold+0xd4/0x30b [ 95.834524][ T9518] ? macvlan_broadcast+0x547/0x620 [ 95.839620][ T9518] ? macvlan_broadcast+0x547/0x620 [ 95.844709][ T9518] __kasan_report.cold+0x1b/0x41 [ 95.849636][ T9518] ? validate_xmit_xfrm+0x3d0/0xf10 [ 95.854853][ T9518] ? macvlan_broadcast+0x547/0x620 [ 95.859964][ T9518] kasan_report+0x12/0x20 [ 95.864282][ T9518] __asan_report_load_n_noabort+0xf/0x20 [ 95.869915][ T9518] macvlan_broadcast+0x547/0x620 [ 95.874844][ T9518] ? validate_xmit_skb+0x81f/0xe50 [ 95.879940][ T9518] macvlan_start_xmit+0x402/0x77f [ 95.884979][ T9518] dev_direct_xmit+0x419/0x630 [ 95.889740][ T9518] ? __check_heap_object+0x51/0xb3 [ 95.894848][ T9518] ? validate_xmit_skb_list+0x150/0x150 [ 95.900381][ T9518] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 95.906632][ T9518] ? netdev_pick_tx+0x14e/0xb00 [ 95.911486][ T9518] packet_direct_xmit+0x1a9/0x250 [ 95.916556][ T9518] packet_sendmsg+0x260d/0x6220 [ 95.922269][ T9518] ? ___might_sleep+0x163/0x2c0 [ 95.927105][ T9518] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 95.933342][ T9518] ? aa_label_sk_perm+0x91/0xf0 [ 95.938196][ T9518] ? packet_notifier+0x880/0x880 [ 95.943238][ T9518] ? __kasan_check_read+0x11/0x20 [ 95.948243][ T9518] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 95.953782][ T9518] ? apparmor_socket_sendmsg+0x2a/0x30 [ 95.959231][ T9518] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 95.965463][ T9518] ? security_socket_sendmsg+0x8d/0xc0 [ 95.970908][ T9518] ? packet_notifier+0x880/0x880 [ 95.976001][ T9518] sock_sendmsg+0xd7/0x130 [ 95.981356][ T9518] __sys_sendto+0x262/0x380 [ 95.985838][ T9518] ? __ia32_sys_getpeername+0xb0/0xb0 [ 95.991206][ T9518] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 95.997428][ T9518] ? put_old_timespec32+0x113/0x200 [ 96.002606][ T9518] ? get_old_timespec32+0x200/0x200 [ 96.007819][ T9518] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.014229][ T9518] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 96.019684][ T9518] ? do_fast_syscall_32+0xd1/0xe16 [ 96.024785][ T9518] ? entry_SYSENTER_compat+0x70/0x7f [ 96.030068][ T9518] __ia32_sys_sendto+0xdf/0x1a0 [ 96.034913][ T9518] do_fast_syscall_32+0x27b/0xe16 [ 96.039934][ T9518] entry_SYSENTER_compat+0x70/0x7f [ 96.045032][ T9518] RIP: 0023:0xf7f60a39 [ 96.049111][ T9518] 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 [ 96.069281][ T9518] RSP: 002b:00000000fff67f0c EFLAGS: 00000292 ORIG_RAX: 0000000000000171 [ 96.077734][ T9518] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000080 [ 96.085811][ T9518] RDX: 000000000000000e RSI: 0000000000000000 RDI: 0000000000000000 [ 96.093771][ T9518] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 96.101819][ T9518] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 96.109880][ T9518] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 96.118214][ T9518] [ 96.120543][ T9518] Allocated by task 9338: [ 96.124858][ T9518] save_stack+0x23/0x90 [ 96.128995][ T9518] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 96.134623][ T9518] kasan_slab_alloc+0xf/0x20 [ 96.139203][ T9518] kmem_cache_alloc+0x121/0x710 [ 96.144054][ T9518] getname_flags+0xd6/0x5b0 [ 96.148551][ T9518] user_path_at_empty+0x2f/0x50 [ 96.153395][ T9518] vfs_statx+0x129/0x200 [ 96.157616][ T9518] __do_sys_newfstatat+0xad/0x130 [ 96.162658][ T9518] __x64_sys_newfstatat+0x97/0xf0 [ 96.167804][ T9518] do_syscall_64+0xfa/0x790 [ 96.172324][ T9518] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.178208][ T9518] [ 96.180551][ T9518] Freed by task 9338: [ 96.184525][ T9518] save_stack+0x23/0x90 [ 96.188681][ T9518] __kasan_slab_free+0x102/0x150 [ 96.193603][ T9518] kasan_slab_free+0xe/0x10 [ 96.198086][ T9518] kmem_cache_free+0x86/0x320 [ 96.202836][ T9518] putname+0xef/0x130 [ 96.206824][ T9518] filename_lookup+0x28f/0x3f0 [ 96.211603][ T9518] user_path_at_empty+0x43/0x50 [ 96.216452][ T9518] vfs_statx+0x129/0x200 [ 96.220673][ T9518] __do_sys_newfstatat+0xad/0x130 [ 96.225676][ T9518] __x64_sys_newfstatat+0x97/0xf0 [ 96.230697][ T9518] do_syscall_64+0xfa/0x790 [ 96.235187][ T9518] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 96.241061][ T9518] [ 96.243398][ T9518] The buggy address belongs to the object at ffff888095d1a680 [ 96.243398][ T9518] which belongs to the cache names_cache of size 4096 [ 96.257615][ T9518] The buggy address is located 385 bytes to the right of [ 96.257615][ T9518] 4096-byte region [ffff888095d1a680, ffff888095d1b680) [ 96.271587][ T9518] The buggy address belongs to the page: [ 96.277200][ T9518] page:ffffea0002574680 refcount:1 mapcount:0 mapping:ffff8880aa5fda80 index:0x0 compound_mapcount: 0 [ 96.288128][ T9518] raw: 00fffe0000010200 ffffea00024a0c88 ffffea0002574608 ffff8880aa5fda80 [ 96.296731][ T9518] raw: 0000000000000000 ffff888095d1a680 0000000100000001 0000000000000000 [ 96.305490][ T9518] page dumped because: kasan: bad access detected [ 96.311888][ T9518] [ 96.314212][ T9518] Memory state around the buggy address: [ 96.319822][ T9518] ffff888095d1b700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 96.327949][ T9518] ffff888095d1b780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 96.336004][ T9518] >ffff888095d1b800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 96.344148][ T9518] ^ [ 96.348213][ T9518] ffff888095d1b880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 96.356306][ T9518] ffff888095d1b900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 96.364388][ T9518] ================================================================== [ 96.372452][ T9518] Disabling lock debugging due to kernel taint [ 96.378668][ T9518] Kernel panic - not syncing: panic_on_warn set ... [ 96.385266][ T9518] CPU: 1 PID: 9518 Comm: syz-executor.0 Tainted: G B 5.5.0-rc5-syzkaller #0 [ 96.395342][ T9518] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.405389][ T9518] Call Trace: [ 96.408684][ T9518] dump_stack+0x197/0x210 [ 96.413021][ T9518] panic+0x2e3/0x75c [ 96.416914][ T9518] ? add_taint.cold+0x16/0x16 [ 96.421577][ T9518] ? trace_hardirqs_on+0x5e/0x240 [ 96.426590][ T9518] ? trace_hardirqs_on+0x5e/0x240 [ 96.431898][ T9518] ? macvlan_broadcast+0x547/0x620 [ 96.437266][ T9518] end_report+0x47/0x4f [ 96.441429][ T9518] ? macvlan_broadcast+0x547/0x620 [ 96.446525][ T9518] __kasan_report.cold+0xe/0x41 [ 96.451415][ T9518] ? validate_xmit_xfrm+0x3d0/0xf10 [ 96.456607][ T9518] ? macvlan_broadcast+0x547/0x620 [ 96.461719][ T9518] kasan_report+0x12/0x20 [ 96.466033][ T9518] __asan_report_load_n_noabort+0xf/0x20 [ 96.471653][ T9518] macvlan_broadcast+0x547/0x620 [ 96.476578][ T9518] ? validate_xmit_skb+0x81f/0xe50 [ 96.481719][ T9518] macvlan_start_xmit+0x402/0x77f [ 96.486763][ T9518] dev_direct_xmit+0x419/0x630 [ 96.491513][ T9518] ? __check_heap_object+0x51/0xb3 [ 96.496712][ T9518] ? validate_xmit_skb_list+0x150/0x150 [ 96.502256][ T9518] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 96.508940][ T9518] ? netdev_pick_tx+0x14e/0xb00 [ 96.514052][ T9518] packet_direct_xmit+0x1a9/0x250 [ 96.519061][ T9518] packet_sendmsg+0x260d/0x6220 [ 96.523900][ T9518] ? ___might_sleep+0x163/0x2c0 [ 96.528853][ T9518] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 96.535109][ T9518] ? aa_label_sk_perm+0x91/0xf0 [ 96.539951][ T9518] ? packet_notifier+0x880/0x880 [ 96.544880][ T9518] ? __kasan_check_read+0x11/0x20 [ 96.549894][ T9518] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 96.555428][ T9518] ? apparmor_socket_sendmsg+0x2a/0x30 [ 96.560881][ T9518] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.567116][ T9518] ? security_socket_sendmsg+0x8d/0xc0 [ 96.572558][ T9518] ? packet_notifier+0x880/0x880 [ 96.577491][ T9518] sock_sendmsg+0xd7/0x130 [ 96.581890][ T9518] __sys_sendto+0x262/0x380 [ 96.586402][ T9518] ? __ia32_sys_getpeername+0xb0/0xb0 [ 96.591950][ T9518] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 96.598168][ T9518] ? put_old_timespec32+0x113/0x200 [ 96.603366][ T9518] ? get_old_timespec32+0x200/0x200 [ 96.608556][ T9518] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 96.614788][ T9518] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 96.620227][ T9518] ? do_fast_syscall_32+0xd1/0xe16 [ 96.625323][ T9518] ? entry_SYSENTER_compat+0x70/0x7f [ 96.630591][ T9518] __ia32_sys_sendto+0xdf/0x1a0 [ 96.635449][ T9518] do_fast_syscall_32+0x27b/0xe16 [ 96.640454][ T9518] entry_SYSENTER_compat+0x70/0x7f [ 96.645553][ T9518] RIP: 0023:0xf7f60a39 [ 96.649614][ T9518] 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 [ 96.669204][ T9518] RSP: 002b:00000000fff67f0c EFLAGS: 00000292 ORIG_RAX: 0000000000000171 [ 96.677689][ T9518] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000080 [ 96.685642][ T9518] RDX: 000000000000000e RSI: 0000000000000000 RDI: 0000000000000000 [ 96.693601][ T9518] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 96.701565][ T9518] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 96.709524][ T9518] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 96.718831][ T9518] Kernel Offset: disabled [ 96.723155][ T9518] Rebooting in 86400 seconds..