[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 39.733294] audit: type=1800 audit(1545875267.588:25): pid=7824 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 39.762022] audit: type=1800 audit(1545875267.588:26): pid=7824 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 39.806780] audit: type=1800 audit(1545875267.588:27): pid=7824 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 '10.128.0.47' (ECDSA) to the list of known hosts. 2018/12/27 01:48:42 parsed 1 programs 2018/12/27 01:48:44 executed programs: 0 syzkaller login: [ 96.340679] IPVS: ftp: loaded support on port[0] = 21 [ 96.595610] chnl_net:caif_netlink_parms(): no params data found [ 96.710448] bridge0: port 1(bridge_slave_0) entered blocking state [ 96.717301] bridge0: port 1(bridge_slave_0) entered disabled state [ 96.724432] device bridge_slave_0 entered promiscuous mode [ 96.744580] bridge0: port 2(bridge_slave_1) entered blocking state [ 96.751467] bridge0: port 2(bridge_slave_1) entered disabled state [ 96.758736] device bridge_slave_1 entered promiscuous mode [ 96.814223] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 96.834991] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 96.888090] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 96.895316] team0: Port device team_slave_0 added [ 96.914401] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 96.921678] team0: Port device team_slave_1 added [ 96.938513] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 96.957340] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 97.024171] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 97.043395] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 97.201010] bridge0: port 2(bridge_slave_1) entered blocking state [ 97.207565] bridge0: port 2(bridge_slave_1) entered forwarding state [ 97.214365] bridge0: port 1(bridge_slave_0) entered blocking state [ 97.220793] bridge0: port 1(bridge_slave_0) entered forwarding state [ 97.568210] bridge0: port 1(bridge_slave_0) entered disabled state [ 97.585573] bridge0: port 2(bridge_slave_1) entered disabled state [ 97.813370] 8021q: adding VLAN 0 to HW filter on device bond0 [ 97.870667] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 97.928874] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 97.935042] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 97.944171] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 97.990542] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 97.997094] 8021q: adding VLAN 0 to HW filter on device team0 [ 98.053649] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 98.060752] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 98.069204] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 98.077226] bridge0: port 1(bridge_slave_0) entered blocking state [ 98.083557] bridge0: port 1(bridge_slave_0) entered forwarding state [ 98.134059] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 98.141403] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 98.150239] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 98.158239] bridge0: port 2(bridge_slave_1) entered blocking state [ 98.164565] bridge0: port 2(bridge_slave_1) entered forwarding state [ 98.215074] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 98.222187] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 98.280246] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 98.287220] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 98.348335] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 98.355200] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 98.364972] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 98.374837] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 98.422754] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 98.430071] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 98.438732] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 98.490280] IPv6: ADDRCONF(NETDEV_UP): veth0_to_hsr: link is not ready [ 98.498673] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 98.506703] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 98.561581] IPv6: ADDRCONF(NETDEV_UP): veth1_to_hsr: link is not ready [ 98.568805] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 98.576891] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 98.936187] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 99.068225] 8021q: adding VLAN 0 to HW filter on device batadv0 2018/12/27 01:48:49 executed programs: 20 [ 103.443564] ================================================================== [ 103.451199] BUG: KASAN: stack-out-of-bounds in ax25_getname+0x58/0x790 [ 103.457867] Write of size 72 at addr ffff888089517b80 by task syz-executor0/8618 [ 103.465413] [ 103.467096] CPU: 1 PID: 8618 Comm: syz-executor0 Not tainted 4.20.0+ #390 [ 103.474006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.483385] Call Trace: [ 103.485975] dump_stack+0x1d3/0x2c6 [ 103.489594] ? dump_stack_print_info.cold.1+0x20/0x20 [ 103.494784] ? printk+0xa7/0xcf [ 103.498053] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 103.502815] ? ksys_dup3+0x680/0x680 [ 103.506566] print_address_description.cold.8+0x9/0x1ff [ 103.511946] kasan_report.cold.9+0x242/0x309 [ 103.516337] ? ax25_getname+0x58/0x790 [ 103.520209] check_memory_region+0x13e/0x1b0 [ 103.524601] memset+0x23/0x40 [ 103.527693] ax25_getname+0x58/0x790 [ 103.531394] vhost_net_ioctl+0x139c/0x1bf0 [ 103.535634] ? vhost_net_buf_peek+0xa30/0xa30 [ 103.540135] ? rcu_read_unlock_special+0x1d0/0x1d0 [ 103.545063] ? kasan_check_read+0x11/0x20 [ 103.549213] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 103.554475] ? rcu_softirq_qs+0x20/0x20 [ 103.558454] ? __fget+0x4d1/0x740 [ 103.561900] ? ksys_dup3+0x680/0x680 [ 103.565602] ? __might_fault+0x12b/0x1e0 [ 103.569675] ? lock_downgrade+0x900/0x900 [ 103.573810] ? lock_release+0xa00/0xa00 [ 103.577783] ? arch_local_save_flags+0x40/0x40 [ 103.582350] ? vhost_net_buf_peek+0xa30/0xa30 [ 103.586832] do_vfs_ioctl+0x1de/0x1790 [ 103.590708] ? ioctl_preallocate+0x300/0x300 [ 103.595114] ? __fget_light+0x2e9/0x430 [ 103.599088] ? fget_raw+0x20/0x20 [ 103.602528] ? _copy_to_user+0xc8/0x110 [ 103.606510] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 103.612081] ? put_timespec64+0x10f/0x1b0 [ 103.616237] ? nsecs_to_jiffies+0x30/0x30 [ 103.620372] ? do_syscall_64+0x9a/0x820 [ 103.624370] ? do_syscall_64+0x9a/0x820 [ 103.628339] ? lockdep_hardirqs_on+0x421/0x5c0 [ 103.632910] ? security_file_ioctl+0x94/0xc0 [ 103.637319] ksys_ioctl+0xa9/0xd0 [ 103.640797] __x64_sys_ioctl+0x73/0xb0 [ 103.644670] do_syscall_64+0x1b9/0x820 [ 103.648560] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 103.653928] ? syscall_return_slowpath+0x5e0/0x5e0 [ 103.658842] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 103.663671] ? trace_hardirqs_on_caller+0x310/0x310 [ 103.668671] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 103.673694] ? prepare_exit_to_usermode+0x291/0x3b0 [ 103.678708] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 103.683579] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.688767] RIP: 0033:0x4579b9 [ 103.691948] Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 103.710868] RSP: 002b:00007f2945617c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 103.718563] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004579b9 [ 103.725818] RDX: 0000000020f1dff8 RSI: 000000004008af30 RDI: 0000000000000004 [ 103.733087] RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 [ 103.740339] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f29456186d4 [ 103.747591] R13: 00000000004c2191 R14: 00000000004d4560 R15: 00000000ffffffff [ 103.754857] [ 103.756470] The buggy address belongs to the page: [ 103.761397] page:ffffea00022545c0 count:0 mapcount:0 mapping:0000000000000000 index:0x0 [ 103.769534] flags: 0x1fffc0000000000() [ 103.773407] raw: 01fffc0000000000 0000000000000000 ffffffff02250101 0000000000000000 [ 103.781275] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 103.789135] page dumped because: kasan: bad access detected [ 103.794837] [ 103.796445] Memory state around the buggy address: [ 103.801367] ffff888089517a80: 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 f2 [ 103.808744] ffff888089517b00: 00 f2 f2 f2 f2 f2 f2 f2 04 f2 f2 f2 f2 f2 f2 f2 [ 103.816087] >ffff888089517b80: 00 00 00 00 00 00 04 f2 00 00 00 00 00 00 00 00 [ 103.823446] ^ [ 103.828359] ffff888089517c00: 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 [ 103.835727] ffff888089517c80: f2 f2 f2 f2 f2 f2 00 00 00 f2 f2 f2 f2 f2 00 00 [ 103.843069] ================================================================== [ 103.850437] Disabling lock debugging due to kernel taint [ 103.857258] Kernel panic - not syncing: panic_on_warn set ... [ 103.863157] CPU: 1 PID: 8618 Comm: syz-executor0 Tainted: G B 4.20.0+ #390 [ 103.871449] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.880798] Call Trace: [ 103.883381] dump_stack+0x1d3/0x2c6 [ 103.887007] ? dump_stack_print_info.cold.1+0x20/0x20 [ 103.892217] panic+0x2ad/0x55c [ 103.895429] ? add_taint.cold.5+0x16/0x16 [ 103.899595] ? preempt_schedule+0x4d/0x60 [ 103.903737] ? ___preempt_schedule+0x16/0x18 [ 103.908130] ? trace_hardirqs_on+0xb4/0x310 [ 103.912454] kasan_end_report+0x47/0x4f [ 103.916448] kasan_report.cold.9+0x76/0x309 [ 103.920794] ? ax25_getname+0x58/0x790 [ 103.924670] check_memory_region+0x13e/0x1b0 [ 103.929072] memset+0x23/0x40 [ 103.932164] ax25_getname+0x58/0x790 [ 103.935894] vhost_net_ioctl+0x139c/0x1bf0 [ 103.940117] ? vhost_net_buf_peek+0xa30/0xa30 [ 103.944596] ? rcu_read_unlock_special+0x1d0/0x1d0 [ 103.949519] ? kasan_check_read+0x11/0x20 [ 103.953674] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 103.958932] ? rcu_softirq_qs+0x20/0x20 [ 103.962895] ? __fget+0x4d1/0x740 [ 103.966335] ? ksys_dup3+0x680/0x680 [ 103.970036] ? __might_fault+0x12b/0x1e0 [ 103.974109] ? lock_downgrade+0x900/0x900 [ 103.978255] ? lock_release+0xa00/0xa00 [ 103.982215] ? arch_local_save_flags+0x40/0x40 [ 103.986788] ? vhost_net_buf_peek+0xa30/0xa30 [ 103.991314] do_vfs_ioctl+0x1de/0x1790 [ 103.995223] ? ioctl_preallocate+0x300/0x300 [ 103.999630] ? __fget_light+0x2e9/0x430 [ 104.003589] ? fget_raw+0x20/0x20 [ 104.007029] ? _copy_to_user+0xc8/0x110 [ 104.011006] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 104.016527] ? put_timespec64+0x10f/0x1b0 [ 104.020669] ? nsecs_to_jiffies+0x30/0x30 [ 104.024819] ? do_syscall_64+0x9a/0x820 [ 104.028774] ? do_syscall_64+0x9a/0x820 [ 104.032742] ? lockdep_hardirqs_on+0x421/0x5c0 [ 104.037324] ? security_file_ioctl+0x94/0xc0 [ 104.041716] ksys_ioctl+0xa9/0xd0 [ 104.045163] __x64_sys_ioctl+0x73/0xb0 [ 104.049036] do_syscall_64+0x1b9/0x820 [ 104.052906] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 104.058255] ? syscall_return_slowpath+0x5e0/0x5e0 [ 104.063165] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 104.067990] ? trace_hardirqs_on_caller+0x310/0x310 [ 104.072993] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 104.078037] ? prepare_exit_to_usermode+0x291/0x3b0 [ 104.083069] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 104.087899] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 104.093071] RIP: 0033:0x4579b9 [ 104.096252] Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 104.115142] RSP: 002b:00007f2945617c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 104.122845] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004579b9 [ 104.130109] RDX: 0000000020f1dff8 RSI: 000000004008af30 RDI: 0000000000000004 [ 104.137365] RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 [ 104.144616] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f29456186d4 [ 104.151882] R13: 00000000004c2191 R14: 00000000004d4560 R15: 00000000ffffffff [ 104.160085] Kernel Offset: disabled [ 104.163706] Rebooting in 86400 seconds..