[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 63.908322][ T25] audit: type=1800 audit(1575488889.168:25): pid=9132 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.928449][ T25] audit: type=1800 audit(1575488889.168:26): pid=9132 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.950365][ T25] audit: type=1800 audit(1575488889.168:27): pid=9132 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[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.18' (ECDSA) to the list of known hosts. 2019/12/04 19:48:19 parsed 1 programs 2019/12/04 19:48:21 executed programs: 0 syzkaller login: [ 75.908762][ T9300] IPVS: ftp: loaded support on port[0] = 21 [ 75.981266][ T9300] chnl_net:caif_netlink_parms(): no params data found [ 76.012913][ T9300] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.021531][ T9300] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.030716][ T9300] device bridge_slave_0 entered promiscuous mode [ 76.039539][ T9300] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.047647][ T9300] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.056609][ T9300] device bridge_slave_1 entered promiscuous mode [ 76.076626][ T9300] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.088489][ T9300] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.110599][ T9300] team0: Port device team_slave_0 added [ 76.118985][ T9300] team0: Port device team_slave_1 added [ 76.176300][ T9300] device hsr_slave_0 entered promiscuous mode [ 76.234873][ T9300] device hsr_slave_1 entered promiscuous mode [ 76.298908][ T9300] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 76.356482][ T9300] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 76.425717][ T9300] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 76.476544][ T9300] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 76.525399][ T9300] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.533078][ T9300] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.541145][ T9300] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.548747][ T9300] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.589590][ T9300] 8021q: adding VLAN 0 to HW filter on device bond0 [ 76.601483][ T9302] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 76.624324][ T9302] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.644198][ T9302] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.652425][ T9302] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 76.665825][ T9300] 8021q: adding VLAN 0 to HW filter on device team0 [ 76.677054][ T3016] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 76.685613][ T3016] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.692749][ T3016] bridge0: port 1(bridge_slave_0) entered forwarding state [ 76.716731][ T9302] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 76.726116][ T9302] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.733268][ T9302] bridge0: port 2(bridge_slave_1) entered forwarding state [ 76.741609][ T9302] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 76.750349][ T9302] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 76.759437][ T9302] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 76.768641][ T9302] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 76.780249][ T9300] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 76.792219][ T9300] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 76.800424][ T3016] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 76.820898][ T9300] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 76.829033][ T9302] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 76.837464][ T9302] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 77.014105][ T9307] ================================================================== [ 77.022845][ T9307] BUG: KASAN: slab-out-of-bounds in linear_transfer+0x6de/0x970 [ 77.030635][ T9307] Read of size 1 at addr ffff8880a7407440 by task syz-executor.0/9307 [ 77.039436][ T9307] [ 77.041965][ T9307] CPU: 0 PID: 9307 Comm: syz-executor.0 Not tainted 5.4.0-syzkaller #0 [ 77.050569][ T9307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.061253][ T9307] Call Trace: [ 77.064888][ T9307] dump_stack+0x197/0x210 [ 77.069381][ T9307] ? linear_transfer+0x6de/0x970 [ 77.074321][ T9307] print_address_description.constprop.0.cold+0xd4/0x30b [ 77.081331][ T9307] ? linear_transfer+0x6de/0x970 [ 77.086281][ T9307] ? linear_transfer+0x6de/0x970 [ 77.091311][ T9307] __kasan_report.cold+0x1b/0x41 [ 77.096255][ T9307] ? linear_transfer+0x6de/0x970 [ 77.101211][ T9307] kasan_report+0x12/0x20 [ 77.106287][ T9307] check_memory_region+0x134/0x1a0 [ 77.111395][ T9307] memcpy+0x24/0x50 [ 77.115197][ T9307] linear_transfer+0x6de/0x970 [ 77.120087][ T9307] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.126859][ T9307] ? snd_pcm_plugin_build_copy+0x410/0x410 [ 77.133891][ T9307] ? io_capture_transfer+0x1fd/0x330 [ 77.139188][ T9307] ? rate_dst_frames+0x2e0/0x2e0 [ 77.144279][ T9307] snd_pcm_plug_read_transfer+0x197/0x2e0 [ 77.150015][ T9307] ? snd_pcm_plug_write_transfer+0x3e0/0x3e0 [ 77.156010][ T9307] ? snd_pcm_format_physical_width+0x75/0x90 [ 77.161994][ T9307] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 77.167701][ T9307] ? snd_pcm_plug_client_channels_buf+0x212/0x450 [ 77.174326][ T9307] snd_pcm_oss_read2+0x1f0/0x3f0 [ 77.179285][ T9307] ? snd_pcm_oss_read3+0x420/0x420 [ 77.184417][ T9307] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.190749][ T9307] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 77.196988][ T9307] snd_pcm_oss_read+0x548/0x6a0 [ 77.201835][ T9307] __vfs_read+0x8a/0x110 [ 77.206089][ T9307] ? snd_pcm_oss_read2+0x3f0/0x3f0 [ 77.211270][ T9307] vfs_read+0x1f0/0x440 [ 77.215457][ T9307] ksys_read+0x14f/0x290 [ 77.219707][ T9307] ? kernel_write+0x130/0x130 [ 77.224587][ T9307] ? do_fast_syscall_32+0xd1/0xe16 [ 77.229699][ T9307] ? entry_SYSENTER_compat+0x70/0x7f [ 77.235061][ T9307] ? do_fast_syscall_32+0xd1/0xe16 [ 77.240175][ T9307] __ia32_sys_read+0x71/0xb0 [ 77.245936][ T9307] do_fast_syscall_32+0x27b/0xe16 [ 77.251749][ T9307] entry_SYSENTER_compat+0x70/0x7f [ 77.256955][ T9307] RIP: 0023:0xf7f9fa39 [ 77.261149][ T9307] Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 77.281530][ T9307] RSP: 002b:00000000f7f9b0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000003 [ 77.290725][ T9307] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000380 [ 77.298825][ T9307] RDX: 0000000000001000 RSI: 0000000000000000 RDI: 0000000000000000 [ 77.306851][ T9307] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 77.315451][ T9307] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 77.323418][ T9307] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 77.331605][ T9307] [ 77.334018][ T9307] Allocated by task 9307: [ 77.339320][ T9307] save_stack+0x23/0x90 [ 77.343842][ T9307] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 77.349565][ T9307] kasan_kmalloc+0x9/0x10 [ 77.354271][ T9307] __kmalloc_node+0x4e/0x70 [ 77.359197][ T9307] kvmalloc_node+0x68/0x100 [ 77.363720][ T9307] snd_pcm_plugin_alloc+0x585/0x770 [ 77.369872][ T9307] snd_pcm_plug_alloc+0x146/0x330 [ 77.374975][ T9307] snd_pcm_oss_change_params_locked+0x210f/0x3750 [ 77.381562][ T9307] snd_pcm_oss_change_params+0x7b/0xd0 [ 77.387119][ T9307] snd_pcm_oss_get_active_substream+0x136/0x190 [ 77.393484][ T9307] snd_pcm_oss_ioctl+0x1794/0x33a0 [ 77.398610][ T9307] snd_pcm_oss_ioctl_compat+0x24/0x30 [ 77.403990][ T9307] __ia32_compat_sys_ioctl+0x233/0x610 [ 77.409444][ T9307] do_fast_syscall_32+0x27b/0xe16 [ 77.414821][ T9307] entry_SYSENTER_compat+0x70/0x7f [ 77.420157][ T9307] [ 77.422558][ T9307] Freed by task 0: [ 77.426342][ T9307] (stack is not available) [ 77.430735][ T9307] [ 77.433063][ T9307] The buggy address belongs to the object at ffff8880a7407400 [ 77.433063][ T9307] which belongs to the cache kmalloc-64 of size 64 [ 77.447817][ T9307] The buggy address is located 0 bytes to the right of [ 77.447817][ T9307] 64-byte region [ffff8880a7407400, ffff8880a7407440) [ 77.461460][ T9307] The buggy address belongs to the page: [ 77.467099][ T9307] page:ffffea00029d01c0 refcount:1 mapcount:0 mapping:ffff8880aa400380 index:0x0 [ 77.476203][ T9307] raw: 00fffe0000000200 ffffea00025fa2c8 ffffea0002697c88 ffff8880aa400380 [ 77.484953][ T9307] raw: 0000000000000000 ffff8880a7407000 0000000100000020 0000000000000000 [ 77.493541][ T9307] page dumped because: kasan: bad access detected [ 77.500472][ T9307] [ 77.502821][ T9307] Memory state around the buggy address: [ 77.508455][ T9307] ffff8880a7407300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 77.516519][ T9307] ffff8880a7407380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 77.524570][ T9307] >ffff8880a7407400: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 77.532719][ T9307] ^ [ 77.538884][ T9307] ffff8880a7407480: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 77.547679][ T9307] ffff8880a7407500: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 77.555749][ T9307] ================================================================== [ 77.564168][ T9307] Disabling lock debugging due to kernel taint [ 77.572955][ T9307] Kernel panic - not syncing: panic_on_warn set ... [ 77.579757][ T9307] CPU: 0 PID: 9307 Comm: syz-executor.0 Tainted: G B 5.4.0-syzkaller #0 [ 77.589482][ T9307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.599886][ T9307] Call Trace: [ 77.603172][ T9307] dump_stack+0x197/0x210 [ 77.607707][ T9307] panic+0x2e3/0x75c [ 77.612604][ T9307] ? add_taint.cold+0x16/0x16 [ 77.618588][ T9307] ? linear_transfer+0x6de/0x970 [ 77.623547][ T9307] ? preempt_schedule+0x4b/0x60 [ 77.628936][ T9307] ? ___preempt_schedule+0x16/0x18 [ 77.634183][ T9307] ? trace_hardirqs_on+0x5e/0x240 [ 77.639506][ T9307] ? linear_transfer+0x6de/0x970 [ 77.644439][ T9307] end_report+0x47/0x4f [ 77.648599][ T9307] ? linear_transfer+0x6de/0x970 [ 77.653965][ T9307] __kasan_report.cold+0xe/0x41 [ 77.658819][ T9307] ? linear_transfer+0x6de/0x970 [ 77.663768][ T9307] kasan_report+0x12/0x20 [ 77.668173][ T9307] check_memory_region+0x134/0x1a0 [ 77.673930][ T9307] memcpy+0x24/0x50 [ 77.677816][ T9307] linear_transfer+0x6de/0x970 [ 77.682576][ T9307] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.688819][ T9307] ? snd_pcm_plugin_build_copy+0x410/0x410 [ 77.694626][ T9307] ? io_capture_transfer+0x1fd/0x330 [ 77.700114][ T9307] ? rate_dst_frames+0x2e0/0x2e0 [ 77.705063][ T9307] snd_pcm_plug_read_transfer+0x197/0x2e0 [ 77.710776][ T9307] ? snd_pcm_plug_write_transfer+0x3e0/0x3e0 [ 77.716759][ T9307] ? snd_pcm_format_physical_width+0x75/0x90 [ 77.722849][ T9307] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 77.728579][ T9307] ? snd_pcm_plug_client_channels_buf+0x212/0x450 [ 77.736480][ T9307] snd_pcm_oss_read2+0x1f0/0x3f0 [ 77.742215][ T9307] ? snd_pcm_oss_read3+0x420/0x420 [ 77.747432][ T9307] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.753693][ T9307] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 77.759960][ T9307] snd_pcm_oss_read+0x548/0x6a0 [ 77.764828][ T9307] __vfs_read+0x8a/0x110 [ 77.769240][ T9307] ? snd_pcm_oss_read2+0x3f0/0x3f0 [ 77.774336][ T9307] vfs_read+0x1f0/0x440 [ 77.778501][ T9307] ksys_read+0x14f/0x290 [ 77.782976][ T9307] ? kernel_write+0x130/0x130 [ 77.787676][ T9307] ? do_fast_syscall_32+0xd1/0xe16 [ 77.793478][ T9307] ? entry_SYSENTER_compat+0x70/0x7f [ 77.798883][ T9307] ? do_fast_syscall_32+0xd1/0xe16 [ 77.803989][ T9307] __ia32_sys_read+0x71/0xb0 [ 77.808575][ T9307] do_fast_syscall_32+0x27b/0xe16 [ 77.813609][ T9307] entry_SYSENTER_compat+0x70/0x7f [ 77.818813][ T9307] RIP: 0023:0xf7f9fa39 [ 77.823047][ T9307] Code: 00 00 00 89 d3 5b 5e 5f 5d c3 b8 80 96 98 00 eb c4 8b 04 24 c3 8b 1c 24 c3 8b 34 24 c3 8b 3c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 77.844035][ T9307] RSP: 002b:00000000f7f9b0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000003 [ 77.853749][ T9307] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000380 [ 77.861895][ T9307] RDX: 0000000000001000 RSI: 0000000000000000 RDI: 0000000000000000 [ 77.870249][ T9307] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 77.878665][ T9307] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 77.886984][ T9307] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 77.896429][ T9307] Kernel Offset: disabled [ 77.900964][ T9307] Rebooting in 86400 seconds..