[?25l[?1c7[ ok 8[?25h[?0c. [ 34.156481] random: sshd: uninitialized urandom read (32 bytes read) [ 34.432148] kauditd_printk_skb: 10 callbacks suppressed [ 34.432157] audit: type=1400 audit(1578425118.777:35): avc: denied { map } for pid=7151 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 34.486450] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 35.103012] random: sshd: uninitialized urandom read (32 bytes read) [ 35.288232] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.56' (ECDSA) to the list of known hosts. [ 40.923014] random: sshd: uninitialized urandom read (32 bytes read) [ 41.041499] audit: type=1400 audit(1578425125.387:36): avc: denied { map } for pid=7164 comm="syz-executor822" path="/root/syz-executor822951160" 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 [ 41.300900] IPVS: ftp: loaded support on port[0] = 21 [ 42.098140] chnl_net:caif_netlink_parms(): no params data found [ 42.132017] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.138554] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.145861] device bridge_slave_0 entered promiscuous mode [ 42.152813] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.159174] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.166357] device bridge_slave_1 entered promiscuous mode [ 42.179982] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.189350] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.205074] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 42.212354] team0: Port device team_slave_0 added [ 42.217803] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 42.224960] team0: Port device team_slave_1 added [ 42.230499] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 42.237851] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 42.321808] device hsr_slave_0 entered promiscuous mode [ 42.370399] device hsr_slave_1 entered promiscuous mode [ 42.440650] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 42.447999] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 42.485840] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.492283] bridge0: port 2(bridge_slave_1) entered forwarding state [ 42.499162] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.505540] bridge0: port 1(bridge_slave_0) entered forwarding state [ 42.533215] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 42.539404] 8021q: adding VLAN 0 to HW filter on device bond0 [ 42.547744] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 42.556212] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 42.575114] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.582219] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.592142] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 42.598228] 8021q: adding VLAN 0 to HW filter on device team0 [ 42.606507] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 42.614198] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.620559] bridge0: port 1(bridge_slave_0) entered forwarding state [ 42.631501] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 42.639009] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.645415] bridge0: port 2(bridge_slave_1) entered forwarding state [ 42.656452] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 42.665343] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 42.674408] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 42.686513] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 42.696557] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 42.706878] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 42.715103] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 42.722778] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 42.730268] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 42.741079] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 42.751472] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 42.758169] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 42.765143] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 42.813812] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 42.824170] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 42.856408] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 42.863576] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 42.869947] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 42.878890] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 42.886441] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 42.893593] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready executing program [ 42.903604] device veth0_vlan entered promiscuous mode [ 42.912405] device veth1_vlan entered promiscuous mode [ 42.918189] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 42.926573] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 42.940803] protocol 88fb is buggy, dev hsr_slave_0 [ 42.945977] protocol 88fb is buggy, dev hsr_slave_1 [ 42.980567] ================================================================== [ 42.988185] BUG: KASAN: use-after-free in macvlan_broadcast+0x4b9/0x5c0 [ 42.994922] Read of size 4 at addr ffff8880a49325c1 by task syz-executor822/7165 [ 43.002434] [ 43.004051] CPU: 0 PID: 7165 Comm: syz-executor822 Not tainted 4.14.162-syzkaller #0 [ 43.011908] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.021253] Call Trace: [ 43.023824] dump_stack+0x142/0x197 [ 43.027432] ? macvlan_broadcast+0x4b9/0x5c0 [ 43.031831] print_address_description.cold+0x7c/0x1dc [ 43.037093] ? macvlan_broadcast+0x4b9/0x5c0 [ 43.041488] kasan_report.cold+0xa9/0x2af [ 43.045628] __asan_report_load_n_noabort+0xf/0x20 [ 43.050542] macvlan_broadcast+0x4b9/0x5c0 [ 43.054775] ? validate_xmit_skb+0x650/0x9d0 [ 43.059176] macvlan_start_xmit+0x56b/0x72d [ 43.063493] packet_direct_xmit+0x431/0x640 [ 43.067800] packet_sendmsg+0x1dd4/0x5a60 [ 43.071951] ? avc_has_perm_noaudit+0x420/0x420 [ 43.076620] ? trace_hardirqs_on+0x10/0x10 [ 43.080847] ? packet_notifier+0x760/0x760 [ 43.085079] ? release_sock+0x14a/0x1b0 [ 43.089126] ? security_socket_sendmsg+0x89/0xb0 [ 43.093873] ? packet_notifier+0x760/0x760 [ 43.098101] sock_sendmsg+0xce/0x110 [ 43.101809] SYSC_sendto+0x206/0x310 [ 43.105503] ? SYSC_connect+0x2d0/0x2d0 [ 43.109467] ? move_addr_to_kernel.part.0+0x100/0x100 [ 43.114641] ? ioctl_preallocate+0x1c0/0x1c0 [ 43.119038] ? security_file_ioctl+0x7d/0xb0 [ 43.123442] ? security_file_ioctl+0x89/0xb0 [ 43.127843] SyS_sendto+0x40/0x50 [ 43.131278] ? SyS_getpeername+0x30/0x30 [ 43.135330] do_syscall_64+0x1e8/0x640 [ 43.139356] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.144255] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 43.149435] RIP: 0033:0x442329 [ 43.152615] RSP: 002b:00007ffd458867d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 43.160394] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442329 [ 43.167646] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 43.175073] RBP: 00007ffd45886800 R08: 0000000000000000 R09: 0000000000000000 [ 43.182334] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 43.189585] R13: 00000000004038c0 R14: 0000000000000000 R15: 0000000000000000 [ 43.196844] [ 43.198453] Allocated by task 6486: [ 43.202072] save_stack_trace+0x16/0x20 [ 43.206026] save_stack+0x45/0xd0 [ 43.209466] kasan_kmalloc+0xce/0xf0 [ 43.213159] kasan_slab_alloc+0xf/0x20 [ 43.217040] kmem_cache_alloc_node+0x144/0x780 [ 43.221620] copy_process.part.0+0x17d5/0x6a70 [ 43.226179] _do_fork+0x19e/0xce0 [ 43.229792] SyS_clone+0x37/0x50 [ 43.233141] do_syscall_64+0x1e8/0x640 [ 43.237018] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 43.242181] [ 43.243806] Freed by task 6521: [ 43.247932] save_stack_trace+0x16/0x20 [ 43.251885] save_stack+0x45/0xd0 [ 43.255326] kasan_slab_free+0x75/0xc0 [ 43.259322] kmem_cache_free+0x83/0x2b0 [ 43.263285] free_task+0xb0/0xe0 [ 43.266633] __put_task_struct+0x1c8/0x480 [ 43.270949] delayed_put_task_struct+0x20b/0x2f0 [ 43.275740] rcu_process_callbacks+0x7b8/0x12b0 [ 43.280408] __do_softirq+0x244/0x9a0 [ 43.284198] [ 43.285809] The buggy address belongs to the object at ffff8880a49322c0 [ 43.285809] which belongs to the cache task_struct of size 6144 [ 43.298832] The buggy address is located 769 bytes inside of [ 43.298832] 6144-byte region [ffff8880a49322c0, ffff8880a4933ac0) [ 43.310776] The buggy address belongs to the page: [ 43.315704] page:ffffea0002924c80 count:1 mapcount:0 mapping:ffff8880a49322c0 index:0x0 compound_mapcount: 0 [ 43.325668] flags: 0xfffe0000008100(slab|head) [ 43.330246] raw: 00fffe0000008100 ffff8880a49322c0 0000000000000000 0000000100000001 [ 43.338109] raw: ffffea000299ae20 ffffea0001fc7aa0 ffff88821f8307c0 0000000000000000 [ 43.345994] page dumped because: kasan: bad access detected [ 43.351698] [ 43.353306] Memory state around the buggy address: [ 43.358229] ffff8880a4932480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.365688] ffff8880a4932500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.373028] >ffff8880a4932580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.380362] ^ [ 43.385789] ffff8880a4932600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.393142] ffff8880a4932680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.400577] ================================================================== [ 43.407922] Disabling lock debugging due to kernel taint [ 43.413391] Kernel panic - not syncing: panic_on_warn set ... [ 43.413391] [ 43.420867] CPU: 0 PID: 7165 Comm: syz-executor822 Tainted: G B 4.14.162-syzkaller #0 [ 43.421285] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 43.429967] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.436977] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 43.445815] Call Trace: [ 43.445832] dump_stack+0x142/0x197 [ 43.445842] ? macvlan_broadcast+0x4b9/0x5c0 [ 43.445848] panic+0x1f9/0x42d [ 43.445853] ? add_taint.cold+0x16/0x16 [ 43.445878] kasan_end_report+0x47/0x4f [ 43.453340] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 43.455210] kasan_report.cold+0x130/0x2af [ 43.485384] __asan_report_load_n_noabort+0xf/0x20 [ 43.490350] macvlan_broadcast+0x4b9/0x5c0 [ 43.494611] ? validate_xmit_skb+0x650/0x9d0 [ 43.499000] macvlan_start_xmit+0x56b/0x72d [ 43.503313] packet_direct_xmit+0x431/0x640 [ 43.507614] packet_sendmsg+0x1dd4/0x5a60 [ 43.511749] ? avc_has_perm_noaudit+0x420/0x420 [ 43.516416] ? trace_hardirqs_on+0x10/0x10 [ 43.520642] ? packet_notifier+0x760/0x760 [ 43.524864] ? release_sock+0x14a/0x1b0 [ 43.528817] ? security_socket_sendmsg+0x89/0xb0 [ 43.533548] ? packet_notifier+0x760/0x760 [ 43.537760] sock_sendmsg+0xce/0x110 [ 43.541448] SYSC_sendto+0x206/0x310 [ 43.545139] ? SYSC_connect+0x2d0/0x2d0 [ 43.549093] ? move_addr_to_kernel.part.0+0x100/0x100 [ 43.554271] ? ioctl_preallocate+0x1c0/0x1c0 [ 43.558660] ? security_file_ioctl+0x7d/0xb0 [ 43.563042] ? security_file_ioctl+0x89/0xb0 [ 43.567439] SyS_sendto+0x40/0x50 [ 43.570874] ? SyS_getpeername+0x30/0x30 [ 43.574912] do_syscall_64+0x1e8/0x640 [ 43.578777] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 43.583605] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 43.588772] RIP: 0033:0x442329 [ 43.591949] RSP: 002b:00007ffd458867d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 43.599637] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000442329 [ 43.606892] RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000003 [ 43.614139] RBP: 00007ffd45886800 R08: 0000000000000000 R09: 0000000000000000 [ 43.621396] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 43.628653] R13: 00000000004038c0 R14: 0000000000000000 R15: 0000000000000000 [ 43.637208] Kernel Offset: disabled [ 43.640847] Rebooting in 86400 seconds..