[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 75.145900][ T26] audit: type=1800 audit(1575545321.363:25): pid=9070 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 75.177910][ T26] audit: type=1800 audit(1575545321.363:26): pid=9070 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 75.219877][ T26] audit: type=1800 audit(1575545321.363:27): pid=9070 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 '10.128.10.24' (ECDSA) to the list of known hosts. syzkaller login: [ 92.846044][ T9227] IPVS: ftp: loaded support on port[0] = 21 [ 92.905604][ T9227] chnl_net:caif_netlink_parms(): no params data found [ 92.934516][ T9227] bridge0: port 1(bridge_slave_0) entered blocking state [ 92.942348][ T9227] bridge0: port 1(bridge_slave_0) entered disabled state [ 92.950848][ T9227] device bridge_slave_0 entered promiscuous mode [ 92.959183][ T9227] bridge0: port 2(bridge_slave_1) entered blocking state [ 92.966412][ T9227] bridge0: port 2(bridge_slave_1) entered disabled state [ 92.974910][ T9227] device bridge_slave_1 entered promiscuous mode [ 92.993478][ T9227] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 93.004342][ T9227] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 93.025803][ T9227] team0: Port device team_slave_0 added [ 93.034481][ T9227] team0: Port device team_slave_1 added [ 93.090735][ T9227] device hsr_slave_0 entered promiscuous mode [ 93.158230][ T9227] device hsr_slave_1 entered promiscuous mode [ 93.234864][ T9227] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 93.280388][ T9227] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 93.331679][ T9227] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 93.380684][ T9227] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 93.439116][ T9227] bridge0: port 2(bridge_slave_1) entered blocking state [ 93.446295][ T9227] bridge0: port 2(bridge_slave_1) entered forwarding state [ 93.454396][ T9227] bridge0: port 1(bridge_slave_0) entered blocking state [ 93.461503][ T9227] bridge0: port 1(bridge_slave_0) entered forwarding state [ 93.500025][ T9227] 8021q: adding VLAN 0 to HW filter on device bond0 [ 93.512712][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 93.534952][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 93.554468][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 93.564126][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 93.577976][ T9227] 8021q: adding VLAN 0 to HW filter on device team0 [ 93.589383][ T2731] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 93.598587][ T2731] bridge0: port 1(bridge_slave_0) entered blocking state [ 93.605670][ T2731] bridge0: port 1(bridge_slave_0) entered forwarding state [ 93.630853][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 93.639881][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 93.647242][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 93.659210][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 93.668463][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 93.677317][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 93.687690][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready executing program [ 93.700280][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 93.710423][ T9227] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 93.732490][ T9227] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 93.741364][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 93.749039][ T44] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 93.836454][ T9232] ================================================================== [ 93.845006][ T9232] BUG: KASAN: slab-out-of-bounds in linear_transfer+0x6de/0x970 [ 93.852637][ T9232] Read of size 1 at addr ffff88809fdc1840 by task syz-executor715/9232 [ 93.860857][ T9232] [ 93.863174][ T9232] CPU: 0 PID: 9232 Comm: syz-executor715 Not tainted 5.4.0-syzkaller #0 [ 93.871474][ T9232] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.881509][ T9232] Call Trace: [ 93.884807][ T9232] dump_stack+0x197/0x210 [ 93.889121][ T9232] ? linear_transfer+0x6de/0x970 [ 93.894053][ T9232] print_address_description.constprop.0.cold+0xd4/0x30b [ 93.901069][ T9232] ? linear_transfer+0x6de/0x970 [ 93.905993][ T9232] ? linear_transfer+0x6de/0x970 [ 93.910933][ T9232] __kasan_report.cold+0x1b/0x41 [ 93.915850][ T9232] ? linear_transfer+0x6de/0x970 [ 93.920767][ T9232] kasan_report+0x12/0x20 [ 93.925076][ T9232] check_memory_region+0x134/0x1a0 [ 93.930165][ T9232] memcpy+0x24/0x50 [ 93.933965][ T9232] linear_transfer+0x6de/0x970 [ 93.938771][ T9232] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.945001][ T9232] ? snd_pcm_plugin_build_copy+0x410/0x410 [ 93.950790][ T9232] ? io_capture_transfer+0x1fd/0x330 [ 93.956070][ T9232] ? rate_dst_frames+0x2e0/0x2e0 [ 93.961022][ T9232] snd_pcm_plug_read_transfer+0x197/0x2e0 [ 93.966767][ T9232] ? snd_pcm_plug_write_transfer+0x3e0/0x3e0 [ 93.972733][ T9232] ? snd_pcm_format_physical_width+0x75/0x90 [ 93.978700][ T9232] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 93.984402][ T9232] ? snd_pcm_plug_client_channels_buf+0x212/0x450 [ 93.990797][ T9232] snd_pcm_oss_read2+0x1f0/0x3f0 [ 93.995748][ T9232] ? snd_pcm_oss_read3+0x420/0x420 [ 94.001030][ T9232] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.007265][ T9232] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 94.013806][ T9232] snd_pcm_oss_read+0x548/0x6a0 [ 94.018658][ T9232] __vfs_read+0x8a/0x110 [ 94.023040][ T9232] ? snd_pcm_oss_read2+0x3f0/0x3f0 [ 94.028266][ T9232] vfs_read+0x1f0/0x440 [ 94.032412][ T9232] ksys_read+0x14f/0x290 [ 94.036661][ T9232] ? kernel_write+0x130/0x130 [ 94.041443][ T9232] ? do_syscall_64+0x26/0x790 [ 94.046117][ T9232] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.052212][ T9232] ? do_syscall_64+0x26/0x790 [ 94.056876][ T9232] __x64_sys_read+0x73/0xb0 [ 94.061361][ T9232] do_syscall_64+0xfa/0x790 [ 94.065845][ T9232] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.071726][ T9232] RIP: 0033:0x447719 [ 94.075614][ T9232] Code: e8 dc 15 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 8b 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 94.095305][ T9232] RSP: 002b:00007f7e8cfd0ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 94.103712][ T9232] RAX: ffffffffffffffda RBX: 00000000006ddc28 RCX: 0000000000447719 [ 94.111660][ T9232] RDX: 0000000000001000 RSI: 0000000020000380 RDI: 0000000000000003 [ 94.119610][ T9232] RBP: 00000000006ddc20 R08: 0000000000000000 R09: 0000000000000000 [ 94.127561][ T9232] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc2c [ 94.135512][ T9232] R13: 00007fff1609f38f R14: 00007f7e8cfd19c0 R15: 0000000000000000 [ 94.143479][ T9232] [ 94.145786][ T9232] Allocated by task 9232: [ 94.150182][ T9232] save_stack+0x23/0x90 [ 94.154315][ T9232] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 94.160278][ T9232] kasan_kmalloc+0x9/0x10 [ 94.164584][ T9232] __kmalloc_node+0x4e/0x70 [ 94.169084][ T9232] kvmalloc_node+0x68/0x100 [ 94.173564][ T9232] snd_pcm_plugin_alloc+0x585/0x770 [ 94.178750][ T9232] snd_pcm_plug_alloc+0x146/0x330 [ 94.183776][ T9232] snd_pcm_oss_change_params_locked+0x210f/0x3750 [ 94.190174][ T9232] snd_pcm_oss_change_params+0x7b/0xd0 [ 94.195608][ T9232] snd_pcm_oss_get_active_substream+0x136/0x190 [ 94.201825][ T9232] snd_pcm_oss_ioctl+0x1794/0x33a0 [ 94.206913][ T9232] do_vfs_ioctl+0x977/0x14e0 [ 94.211478][ T9232] ksys_ioctl+0xab/0xd0 [ 94.215616][ T9232] __x64_sys_ioctl+0x73/0xb0 [ 94.220183][ T9232] do_syscall_64+0xfa/0x790 [ 94.224673][ T9232] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.230539][ T9232] [ 94.232845][ T9232] Freed by task 0: [ 94.236565][ T9232] (stack is not available) [ 94.240950][ T9232] [ 94.243269][ T9232] The buggy address belongs to the object at ffff88809fdc1800 [ 94.243269][ T9232] which belongs to the cache kmalloc-64 of size 64 [ 94.257127][ T9232] The buggy address is located 0 bytes to the right of [ 94.257127][ T9232] 64-byte region [ffff88809fdc1800, ffff88809fdc1840) [ 94.270629][ T9232] The buggy address belongs to the page: [ 94.276239][ T9232] page:ffffea00027f7040 refcount:1 mapcount:0 mapping:ffff8880aa400380 index:0x0 [ 94.285323][ T9232] raw: 00fffe0000000200 ffffea0002593a48 ffff8880aa401348 ffff8880aa400380 [ 94.293884][ T9232] raw: 0000000000000000 ffff88809fdc1000 0000000100000020 0000000000000000 [ 94.302443][ T9232] page dumped because: kasan: bad access detected [ 94.308827][ T9232] [ 94.311146][ T9232] Memory state around the buggy address: [ 94.316761][ T9232] ffff88809fdc1700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 94.324815][ T9232] ffff88809fdc1780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 94.332880][ T9232] >ffff88809fdc1800: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 94.340924][ T9232] ^ [ 94.347062][ T9232] ffff88809fdc1880: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 94.355099][ T9232] ffff88809fdc1900: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 94.363145][ T9232] ================================================================== [ 94.371180][ T9232] Disabling lock debugging due to kernel taint [ 94.382433][ T9232] Kernel panic - not syncing: panic_on_warn set ... [ 94.389038][ T9232] CPU: 0 PID: 9232 Comm: syz-executor715 Tainted: G B 5.4.0-syzkaller #0 [ 94.398722][ T9232] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 94.408750][ T9232] Call Trace: [ 94.412034][ T9232] dump_stack+0x197/0x210 [ 94.416338][ T9232] panic+0x2e3/0x75c [ 94.420208][ T9232] ? add_taint.cold+0x16/0x16 [ 94.424860][ T9232] ? linear_transfer+0x6de/0x970 [ 94.429776][ T9232] ? preempt_schedule+0x4b/0x60 [ 94.434620][ T9232] ? ___preempt_schedule+0x16/0x18 [ 94.439979][ T9232] ? trace_hardirqs_on+0x5e/0x240 [ 94.445044][ T9232] ? linear_transfer+0x6de/0x970 [ 94.449977][ T9232] end_report+0x47/0x4f [ 94.454124][ T9232] ? linear_transfer+0x6de/0x970 [ 94.459041][ T9232] __kasan_report.cold+0xe/0x41 [ 94.463871][ T9232] ? linear_transfer+0x6de/0x970 [ 94.470536][ T9232] kasan_report+0x12/0x20 [ 94.474844][ T9232] check_memory_region+0x134/0x1a0 [ 94.479938][ T9232] memcpy+0x24/0x50 [ 94.483723][ T9232] linear_transfer+0x6de/0x970 [ 94.488463][ T9232] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.494700][ T9232] ? snd_pcm_plugin_build_copy+0x410/0x410 [ 94.500483][ T9232] ? io_capture_transfer+0x1fd/0x330 [ 94.505743][ T9232] ? rate_dst_frames+0x2e0/0x2e0 [ 94.510675][ T9232] snd_pcm_plug_read_transfer+0x197/0x2e0 [ 94.516370][ T9232] ? snd_pcm_plug_write_transfer+0x3e0/0x3e0 [ 94.522325][ T9232] ? snd_pcm_format_physical_width+0x75/0x90 [ 94.528278][ T9232] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 94.534057][ T9232] ? snd_pcm_plug_client_channels_buf+0x212/0x450 [ 94.540458][ T9232] snd_pcm_oss_read2+0x1f0/0x3f0 [ 94.545371][ T9232] ? snd_pcm_oss_read3+0x420/0x420 [ 94.550483][ T9232] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 94.556720][ T9232] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 94.562971][ T9232] snd_pcm_oss_read+0x548/0x6a0 [ 94.567814][ T9232] __vfs_read+0x8a/0x110 [ 94.572046][ T9232] ? snd_pcm_oss_read2+0x3f0/0x3f0 [ 94.577133][ T9232] vfs_read+0x1f0/0x440 [ 94.581265][ T9232] ksys_read+0x14f/0x290 [ 94.585483][ T9232] ? kernel_write+0x130/0x130 [ 94.590133][ T9232] ? do_syscall_64+0x26/0x790 [ 94.594795][ T9232] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.600884][ T9232] ? do_syscall_64+0x26/0x790 [ 94.605538][ T9232] __x64_sys_read+0x73/0xb0 [ 94.610025][ T9232] do_syscall_64+0xfa/0x790 [ 94.614536][ T9232] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 94.620399][ T9232] RIP: 0033:0x447719 [ 94.624273][ T9232] Code: e8 dc 15 03 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 8b 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 94.643946][ T9232] RSP: 002b:00007f7e8cfd0ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 94.652434][ T9232] RAX: ffffffffffffffda RBX: 00000000006ddc28 RCX: 0000000000447719 [ 94.660384][ T9232] RDX: 0000000000001000 RSI: 0000000020000380 RDI: 0000000000000003 [ 94.668337][ T9232] RBP: 00000000006ddc20 R08: 0000000000000000 R09: 0000000000000000 [ 94.676308][ T9232] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006ddc2c [ 94.684255][ T9232] R13: 00007fff1609f38f R14: 00007f7e8cfd19c0 R15: 0000000000000000 [ 94.693825][ T9232] Kernel Offset: disabled [ 94.698149][ T9232] Rebooting in 86400 seconds..