[ 40.624147] audit: type=1800 audit(1578320134.301:31): pid=7753 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 40.657403] audit: type=1800 audit(1578320134.301:32): pid=7753 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?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 '10.128.0.89' (ECDSA) to the list of known hosts. syzkaller login: [ 51.090464] kauditd_printk_skb: 3 callbacks suppressed [ 51.090486] audit: type=1400 audit(1578320144.831:36): avc: denied { map } for pid=7938 comm="syz-executor633" path="/root/syz-executor633977488" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 51.110778] IPVS: ftp: loaded support on port[0] = 21 [ 51.150137] audit: type=1400 audit(1578320144.891:37): avc: denied { create } for pid=7939 comm="syz-executor633" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 51.174298] audit: type=1400 audit(1578320144.891:38): avc: denied { write } for pid=7939 comm="syz-executor633" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 51.174324] audit: type=1400 audit(1578320144.891:39): avc: denied { read } for pid=7939 comm="syz-executor633" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 51.248552] chnl_net:caif_netlink_parms(): no params data found [ 51.281832] bridge0: port 1(bridge_slave_0) entered blocking state [ 51.288495] bridge0: port 1(bridge_slave_0) entered disabled state [ 51.295724] device bridge_slave_0 entered promiscuous mode [ 51.303279] bridge0: port 2(bridge_slave_1) entered blocking state [ 51.309729] bridge0: port 2(bridge_slave_1) entered disabled state [ 51.316634] device bridge_slave_1 entered promiscuous mode [ 51.332965] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 51.342185] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 51.358166] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 51.365780] team0: Port device team_slave_0 added [ 51.371495] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 51.378713] team0: Port device team_slave_1 added [ 51.384067] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 51.392224] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 51.479401] device hsr_slave_0 entered promiscuous mode [ 51.547984] device hsr_slave_1 entered promiscuous mode [ 51.598068] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 51.605317] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 51.651000] bridge0: port 2(bridge_slave_1) entered blocking state [ 51.657809] bridge0: port 2(bridge_slave_1) entered forwarding state [ 51.664615] bridge0: port 1(bridge_slave_0) entered blocking state [ 51.671051] bridge0: port 1(bridge_slave_0) entered forwarding state [ 51.703205] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 51.710518] 8021q: adding VLAN 0 to HW filter on device bond0 [ 51.718753] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 51.727039] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 51.746607] bridge0: port 1(bridge_slave_0) entered disabled state [ 51.755058] bridge0: port 2(bridge_slave_1) entered disabled state [ 51.762608] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 51.772464] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 51.779125] 8021q: adding VLAN 0 to HW filter on device team0 [ 51.799239] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 51.806864] bridge0: port 1(bridge_slave_0) entered blocking state [ 51.813297] bridge0: port 1(bridge_slave_0) entered forwarding state [ 51.836911] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 51.846948] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 51.858126] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 51.865348] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 51.873378] bridge0: port 2(bridge_slave_1) entered blocking state [ 51.879779] bridge0: port 2(bridge_slave_1) entered forwarding state [ 51.887570] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 51.895259] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 51.903370] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 51.911115] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 51.918873] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 51.925668] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 51.937908] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 51.949201] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 51.955805] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 51.962690] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 51.976891] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 51.987682] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 52.031028] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 52.038660] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 52.045352] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 52.055579] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 52.063326] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 52.070355] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready executing program [ 52.079058] device veth0_vlan entered promiscuous mode [ 52.088174] device veth1_vlan entered promiscuous mode [ 52.094008] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 52.102866] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 52.127589] protocol 88fb is buggy, dev hsr_slave_0 [ 52.132814] protocol 88fb is buggy, dev hsr_slave_1 [ 52.148244] ================================================================== [ 52.155714] BUG: KASAN: use-after-free in macvlan_broadcast+0x57c/0x660 [ 52.162467] Read of size 4 at addr ffff88808ba4b041 by task syz-executor633/7939 [ 52.169981] [ 52.171599] CPU: 0 PID: 7939 Comm: syz-executor633 Not tainted 4.19.93-syzkaller #0 [ 52.179374] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.188764] Call Trace: [ 52.191376] dump_stack+0x197/0x210 [ 52.195017] ? macvlan_broadcast+0x57c/0x660 [ 52.199428] print_address_description.cold+0x7c/0x20d [ 52.204701] ? macvlan_broadcast+0x57c/0x660 [ 52.209094] kasan_report.cold+0x8c/0x2ba [ 52.213233] __asan_report_load_n_noabort+0xf/0x20 [ 52.218168] macvlan_broadcast+0x57c/0x660 [ 52.222401] macvlan_start_xmit+0x408/0x785 [ 52.226709] dev_direct_xmit+0x34d/0x650 [ 52.230775] ? validate_xmit_skb_list+0x130/0x130 [ 52.235661] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.241221] ? skb_copy_datagram_from_iter+0x441/0x660 [ 52.246490] packet_direct_xmit+0xf9/0x170 [ 52.250715] packet_sendmsg+0x3bb2/0x6440 [ 52.254882] ? packet_notifier+0x840/0x840 [ 52.259108] ? release_sock+0x156/0x1c0 [ 52.263602] ? selinux_socket_sendmsg+0x36/0x40 [ 52.268255] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.273773] ? security_socket_sendmsg+0x8d/0xc0 [ 52.278606] ? packet_notifier+0x840/0x840 [ 52.282859] sock_sendmsg+0xd7/0x130 [ 52.286564] __sys_sendto+0x262/0x380 [ 52.290354] ? __ia32_sys_getpeername+0xb0/0xb0 [ 52.295016] ? __ia32_sys_socketpair+0xf0/0xf0 [ 52.299682] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.305205] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 52.309967] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 52.314715] ? do_syscall_64+0x26/0x620 [ 52.318761] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.324111] __x64_sys_sendto+0xe1/0x1a0 [ 52.328159] do_syscall_64+0xfd/0x620 [ 52.331955] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.337139] RIP: 0033:0x442bd9 [ 52.340319] 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 [ 52.359206] RSP: 002b:00007ffc2ad49008 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 52.366908] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442bd9 [ 52.374247] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 52.381499] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 52.388770] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 52.396033] R13: 0000000000404150 R14: 0000000000000000 R15: 0000000000000000 [ 52.404028] [ 52.405639] The buggy address belongs to the page: [ 52.410571] page:ffffea00022e92c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0 [ 52.418697] flags: 0xfffe0000000000() [ 52.422485] raw: 00fffe0000000000 0000000000000000 ffffffff022e0101 0000000000000000 [ 52.430350] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 52.438208] page dumped because: kasan: bad access detected [ 52.443896] [ 52.445503] Memory state around the buggy address: [ 52.450413] ffff88808ba4af00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 52.457755] ffff88808ba4af80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 52.465094] >ffff88808ba4b000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 52.472441] ^ [ 52.477960] ffff88808ba4b080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 52.485308] ffff88808ba4b100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 52.492655] ================================================================== [ 52.500001] Disabling lock debugging due to kernel taint [ 52.505507] Kernel panic - not syncing: panic_on_warn set ... [ 52.505507] [ 52.507537] protocol 88fb is buggy, dev hsr_slave_0 [ 52.512881] CPU: 0 PID: 7939 Comm: syz-executor633 Tainted: G B 4.19.93-syzkaller #0 [ 52.517955] protocol 88fb is buggy, dev hsr_slave_1 [ 52.527074] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.536823] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 52.541404] Call Trace: [ 52.541426] dump_stack+0x197/0x210 [ 52.541444] ? macvlan_broadcast+0x57c/0x660 [ 52.549274] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 52.550769] panic+0x26a/0x50e [ 52.568790] ? __warn_printk+0xf3/0xf3 [ 52.572661] ? retint_kernel+0x2d/0x2d [ 52.576537] ? trace_hardirqs_on+0x5e/0x220 [ 52.580844] ? macvlan_broadcast+0x57c/0x660 [ 52.585303] kasan_end_report+0x47/0x4f [ 52.589262] kasan_report.cold+0xa9/0x2ba [ 52.593395] __asan_report_load_n_noabort+0xf/0x20 [ 52.598307] macvlan_broadcast+0x57c/0x660 [ 52.602525] macvlan_start_xmit+0x408/0x785 [ 52.606831] dev_direct_xmit+0x34d/0x650 [ 52.610918] ? validate_xmit_skb_list+0x130/0x130 [ 52.615750] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.621279] ? skb_copy_datagram_from_iter+0x441/0x660 [ 52.626542] packet_direct_xmit+0xf9/0x170 [ 52.630784] packet_sendmsg+0x3bb2/0x6440 [ 52.634919] ? packet_notifier+0x840/0x840 [ 52.639142] ? release_sock+0x156/0x1c0 [ 52.643103] ? selinux_socket_sendmsg+0x36/0x40 [ 52.647786] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.653326] ? security_socket_sendmsg+0x8d/0xc0 [ 52.658071] ? packet_notifier+0x840/0x840 [ 52.662293] sock_sendmsg+0xd7/0x130 [ 52.666037] __sys_sendto+0x262/0x380 [ 52.669847] ? __ia32_sys_getpeername+0xb0/0xb0 [ 52.674509] ? __ia32_sys_socketpair+0xf0/0xf0 [ 52.679142] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.684672] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 52.689413] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 52.694157] ? do_syscall_64+0x26/0x620 [ 52.698144] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.703503] __x64_sys_sendto+0xe1/0x1a0 [ 52.707769] do_syscall_64+0xfd/0x620 [ 52.711710] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.716886] RIP: 0033:0x442bd9 [ 52.720082] 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 [ 52.738993] RSP: 002b:00007ffc2ad49008 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 52.746702] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442bd9 [ 52.753966] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 52.761218] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 52.768481] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 52.775733] R13: 0000000000404150 R14: 0000000000000000 R15: 0000000000000000 [ 52.784342] Kernel Offset: disabled [ 52.787966] Rebooting in 86400 seconds..