[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 60.662597][ T23] audit: type=1800 audit(1575279339.524:25): pid=8976 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 60.694184][ T23] audit: type=1800 audit(1575279339.534:26): pid=8976 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 60.736410][ T23] audit: type=1800 audit(1575279339.534:27): pid=8976 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 '10.128.0.160' (ECDSA) to the list of known hosts. 2019/12/02 09:35:47 parsed 1 programs 2019/12/02 09:35:49 executed programs: 0 syzkaller login: [ 71.006882][ T9144] IPVS: ftp: loaded support on port[0] = 21 [ 71.070963][ T9144] chnl_net:caif_netlink_parms(): no params data found [ 71.100999][ T9144] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.109198][ T9144] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.117774][ T9144] device bridge_slave_0 entered promiscuous mode [ 71.126070][ T9144] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.133142][ T9144] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.141651][ T9144] device bridge_slave_1 entered promiscuous mode [ 71.162521][ T9144] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 71.173396][ T9144] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 71.192846][ T9144] team0: Port device team_slave_0 added [ 71.204279][ T9144] team0: Port device team_slave_1 added [ 71.276073][ T9144] device hsr_slave_0 entered promiscuous mode [ 71.364547][ T9144] device hsr_slave_1 entered promiscuous mode [ 71.446879][ T9144] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 71.496342][ T9144] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 71.547348][ T9144] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 71.595918][ T9144] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 71.655076][ T9144] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.662216][ T9144] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.670064][ T9144] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.677170][ T9144] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.712529][ T9144] 8021q: adding VLAN 0 to HW filter on device bond0 [ 71.727710][ T1100] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 71.748441][ T1100] bridge0: port 1(bridge_slave_0) entered disabled state [ 71.768104][ T1100] bridge0: port 2(bridge_slave_1) entered disabled state [ 71.776409][ T1100] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 71.789105][ T9144] 8021q: adding VLAN 0 to HW filter on device team0 [ 71.799210][ T3694] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 71.808288][ T3694] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.815718][ T3694] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.827399][ T1100] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 71.836286][ T1100] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.843319][ T1100] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.865490][ T1100] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 71.875019][ T1100] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 71.883362][ T1100] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 71.896201][ T1100] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 71.904114][ T1100] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 71.914798][ T9144] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 71.930950][ T3694] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 71.938755][ T3694] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 71.950569][ T9144] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 72.134992][ T9151] ================================================================== [ 72.143313][ T9151] BUG: KASAN: slab-out-of-bounds in pipe_write+0xe30/0x1000 [ 72.150633][ T9151] Write of size 8 at addr ffff8880a7dfe7a8 by task syz-executor.0/9151 [ 72.158880][ T9151] [ 72.161202][ T9151] CPU: 1 PID: 9151 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0 [ 72.169412][ T9151] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.179445][ T9151] Call Trace: [ 72.182732][ T9151] dump_stack+0x197/0x210 [ 72.187054][ T9151] ? pipe_write+0xe30/0x1000 [ 72.191631][ T9151] print_address_description.constprop.0.cold+0xd4/0x30b [ 72.198644][ T9151] ? pipe_write+0xe30/0x1000 [ 72.203229][ T9151] ? pipe_write+0xe30/0x1000 [ 72.207802][ T9151] __kasan_report.cold+0x1b/0x41 [ 72.212722][ T9151] ? pipe_write+0xe30/0x1000 [ 72.217296][ T9151] kasan_report+0x12/0x20 [ 72.221606][ T9151] __asan_report_store8_noabort+0x17/0x20 [ 72.227308][ T9151] pipe_write+0xe30/0x1000 [ 72.231710][ T9151] new_sync_write+0x4d3/0x770 [ 72.236386][ T9151] ? new_sync_read+0x800/0x800 [ 72.241134][ T9151] ? __fget+0x37f/0x550 [ 72.245305][ T9151] ? apparmor_file_permission+0x25/0x30 [ 72.250845][ T9151] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.257079][ T9151] ? security_file_permission+0x8f/0x380 [ 72.262702][ T9151] __vfs_write+0xe1/0x110 [ 72.267023][ T9151] vfs_write+0x268/0x5d0 [ 72.271257][ T9151] ksys_write+0x220/0x290 [ 72.275585][ T9151] ? __ia32_sys_read+0xb0/0xb0 [ 72.280352][ T9151] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 72.285801][ T9151] ? do_syscall_64+0x26/0x790 [ 72.290465][ T9151] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.296515][ T9151] ? do_syscall_64+0x26/0x790 [ 72.301178][ T9151] __x64_sys_write+0x73/0xb0 [ 72.305770][ T9151] do_syscall_64+0xfa/0x790 [ 72.310257][ T9151] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.316129][ T9151] RIP: 0033:0x45a679 [ 72.320003][ T9151] Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 72.339591][ T9151] RSP: 002b:00007f0ba1981c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 72.348162][ T9151] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679 [ 72.356117][ T9151] RDX: 00000000fffffef3 RSI: 00000000200001c0 RDI: 0000000000000004 [ 72.364085][ T9151] RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 [ 72.372035][ T9151] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0ba19826d4 [ 72.379991][ T9151] R13: 00000000004c7830 R14: 00000000004e44b0 R15: 00000000ffffffff [ 72.387951][ T9151] [ 72.390262][ T9151] Allocated by task 9153: [ 72.394579][ T9151] save_stack+0x23/0x90 [ 72.398814][ T9151] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 72.405559][ T9151] kasan_kmalloc+0x9/0x10 [ 72.409886][ T9151] __kmalloc+0x163/0x770 [ 72.414118][ T9151] pipe_fcntl+0x3f7/0x8e0 [ 72.418492][ T9151] do_fcntl+0x255/0x1030 [ 72.422721][ T9151] __x64_sys_fcntl+0x16d/0x1e0 [ 72.427477][ T9151] do_syscall_64+0xfa/0x790 [ 72.432011][ T9151] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.437882][ T9151] [ 72.440199][ T9151] Freed by task 0: [ 72.443912][ T9151] (stack is not available) [ 72.448316][ T9151] [ 72.450628][ T9151] The buggy address belongs to the object at ffff8880a7dfe780 [ 72.450628][ T9151] which belongs to the cache kmalloc-64(17:syz0) of size 64 [ 72.465270][ T9151] The buggy address is located 40 bytes inside of [ 72.465270][ T9151] 64-byte region [ffff8880a7dfe780, ffff8880a7dfe7c0) [ 72.478457][ T9151] The buggy address belongs to the page: [ 72.484175][ T9151] page:ffffea00029f7f80 refcount:1 mapcount:0 mapping:ffff8880a5ba2e00 index:0xffff8880a7dfef80 [ 72.494573][ T9151] raw: 00fffe0000000200 ffff8880a0103438 ffff8880a0103438 ffff8880a5ba2e00 [ 72.503317][ T9151] raw: ffff8880a7dfef80 ffff8880a7dfe000 0000000100000010 0000000000000000 [ 72.511889][ T9151] page dumped because: kasan: bad access detected [ 72.518287][ T9151] [ 72.520594][ T9151] Memory state around the buggy address: [ 72.526204][ T9151] ffff8880a7dfe680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 72.534245][ T9151] ffff8880a7dfe700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 72.542393][ T9151] >ffff8880a7dfe780: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 72.550437][ T9151] ^ [ 72.555794][ T9151] ffff8880a7dfe800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 72.563844][ T9151] ffff8880a7dfe880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 72.571987][ T9151] ================================================================== [ 72.580030][ T9151] Disabling lock debugging due to kernel taint [ 72.587943][ T9151] Kernel panic - not syncing: panic_on_warn set ... [ 72.594539][ T9151] CPU: 1 PID: 9151 Comm: syz-executor.0 Tainted: G B 5.4.0-syzkaller #0 [ 72.604144][ T9151] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.614196][ T9151] Call Trace: [ 72.617468][ T9151] dump_stack+0x197/0x210 [ 72.621790][ T9151] panic+0x2e3/0x75c [ 72.625665][ T9151] ? add_taint.cold+0x16/0x16 [ 72.630345][ T9151] ? pipe_write+0xe30/0x1000 [ 72.634935][ T9151] ? preempt_schedule+0x4b/0x60 [ 72.639780][ T9151] ? ___preempt_schedule+0x16/0x18 [ 72.645856][ T9151] ? trace_hardirqs_on+0x5e/0x240 [ 72.650862][ T9151] ? pipe_write+0xe30/0x1000 [ 72.655448][ T9151] end_report+0x47/0x4f [ 72.659589][ T9151] ? pipe_write+0xe30/0x1000 [ 72.664162][ T9151] __kasan_report.cold+0xe/0x41 [ 72.669003][ T9151] ? pipe_write+0xe30/0x1000 [ 72.673588][ T9151] kasan_report+0x12/0x20 [ 72.677942][ T9151] __asan_report_store8_noabort+0x17/0x20 [ 72.683660][ T9151] pipe_write+0xe30/0x1000 [ 72.688061][ T9151] new_sync_write+0x4d3/0x770 [ 72.692734][ T9151] ? new_sync_read+0x800/0x800 [ 72.697498][ T9151] ? __fget+0x37f/0x550 [ 72.701665][ T9151] ? apparmor_file_permission+0x25/0x30 [ 72.707209][ T9151] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 72.713515][ T9151] ? security_file_permission+0x8f/0x380 [ 72.719165][ T9151] __vfs_write+0xe1/0x110 [ 72.723501][ T9151] vfs_write+0x268/0x5d0 [ 72.727729][ T9151] ksys_write+0x220/0x290 [ 72.732085][ T9151] ? __ia32_sys_read+0xb0/0xb0 [ 72.736855][ T9151] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 72.742302][ T9151] ? do_syscall_64+0x26/0x790 [ 72.746961][ T9151] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.753018][ T9151] ? do_syscall_64+0x26/0x790 [ 72.757684][ T9151] __x64_sys_write+0x73/0xb0 [ 72.762257][ T9151] do_syscall_64+0xfa/0x790 [ 72.766752][ T9151] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.772627][ T9151] RIP: 0033:0x45a679 [ 72.776514][ T9151] Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 72.796114][ T9151] RSP: 002b:00007f0ba1981c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 72.804541][ T9151] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a679 [ 72.812507][ T9151] RDX: 00000000fffffef3 RSI: 00000000200001c0 RDI: 0000000000000004 [ 72.820457][ T9151] RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 [ 72.828421][ T9151] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0ba19826d4 [ 72.836484][ T9151] R13: 00000000004c7830 R14: 00000000004e44b0 R15: 00000000ffffffff [ 72.845821][ T9151] Kernel Offset: disabled [ 72.850147][ T9151] Rebooting in 86400 seconds..