[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 60.008649] audit: type=1800 audit(1541596702.053:25): pid=6153 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 60.028330] audit: type=1800 audit(1541596702.053:26): pid=6153 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 60.047821] audit: type=1800 audit(1541596702.083:27): pid=6153 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 '10.128.0.40' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 82.851874] hrtimer: interrupt took 255883 ns executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 85.120953] ================================================================== [ 85.128406] BUG: KMSAN: uninit-value in linear_transfer+0x92d/0xca0 [ 85.134850] CPU: 1 PID: 6835 Comm: syz-executor866 Not tainted 4.19.0+ #78 [ 85.141876] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.151247] Call Trace: [ 85.153878] dump_stack+0x32d/0x480 [ 85.157533] ? _raw_spin_lock_irqsave+0x237/0x340 [ 85.162402] ? linear_transfer+0x92d/0xca0 [ 85.166685] kmsan_report+0x19f/0x300 executing program [ 85.170534] __msan_warning+0x76/0xd0 [ 85.174384] linear_transfer+0x92d/0xca0 [ 85.178514] ? snd_pcm_plugin_build_linear+0xc40/0xc40 [ 85.183821] snd_pcm_plug_read_transfer+0x3bf/0x590 [ 85.188915] snd_pcm_oss_read+0xe6d/0x1cb0 [ 85.193219] ? snd_pcm_oss_unregister_minor+0x4b0/0x4b0 [ 85.198619] __vfs_read+0x1e2/0xb10 [ 85.202285] ? rw_verify_area+0x35e/0x580 [ 85.206477] vfs_read+0x380/0x6b0 [ 85.209978] __se_sys_read+0x17a/0x370 [ 85.213911] __x64_sys_read+0x4a/0x70 [ 85.217738] do_syscall_64+0xcf/0x110 executing program [ 85.221574] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 85.226793] RIP: 0033:0x446379 [ 85.230017] Code: e8 0c e8 ff ff 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 7b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 85.248940] RSP: 002b:00007fcd5b97cda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 85.256676] RAX: ffffffffffffffda RBX: 00000000006dac38 RCX: 0000000000446379 [ 85.263969] RDX: 0000000000000184 RSI: 0000000020002180 RDI: 0000000000000003 [ 85.271259] RBP: 00000000006dac30 R08: 0000000000000000 R09: 0000000000000000 [ 85.278550] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac3c [ 85.285850] R13: 7073642f7665642f R14: 00800000c0045002 R15: 0000000000000001 [ 85.293157] [ 85.294798] Uninit was stored to memory at: [ 85.299158] kmsan_internal_chain_origin+0x136/0x240 [ 85.304289] kmsan_memcpy_origins+0x13d/0x1b0 [ 85.308806] __msan_memcpy+0x6f/0x80 [ 85.312558] linear_transfer+0x74c/0xca0 [ 85.316653] snd_pcm_plug_read_transfer+0x3bf/0x590 executing program [ 85.321698] snd_pcm_oss_read+0xe6d/0x1cb0 [ 85.325951] __vfs_read+0x1e2/0xb10 [ 85.329604] vfs_read+0x380/0x6b0 [ 85.333080] __se_sys_read+0x17a/0x370 [ 85.336987] __x64_sys_read+0x4a/0x70 [ 85.340813] do_syscall_64+0xcf/0x110 [ 85.344652] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 85.349864] [ 85.351504] Uninit was created at: [ 85.355069] kmsan_internal_alloc_meta_for_pages+0x155/0x740 [ 85.360897] kmsan_alloc_page+0x77/0xe0 [ 85.364901] __alloc_pages_nodemask+0x12cc/0x6640 executing program [ 85.369768] alloc_pages_current+0x584/0x7e0 [ 85.374202] __vmalloc_node_range+0x879/0x12a0 [ 85.378804] vmalloc+0xd8/0xf0 [ 85.382032] snd_pcm_plugin_alloc+0x255/0xc80 [ 85.386547] snd_pcm_plug_alloc+0x281/0x600 [ 85.390898] snd_pcm_oss_change_params_locked+0x5e40/0x6e30 [ 85.396634] snd_pcm_oss_get_active_substream+0x4f7/0x5a0 [ 85.402190] snd_pcm_oss_ioctl+0x4adb/0x8860 [ 85.406628] do_vfs_ioctl+0xf77/0x2d30 [ 85.410538] __se_sys_ioctl+0x1da/0x270 [ 85.414534] __x64_sys_ioctl+0x4a/0x70 [ 85.418449] do_syscall_64+0xcf/0x110 executing program [ 85.422541] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 85.427755] ================================================================== [ 85.435128] Disabling lock debugging due to kernel taint [ 85.440595] Kernel panic - not syncing: panic_on_warn set ... [ 85.440595] [ 85.447997] CPU: 1 PID: 6835 Comm: syz-executor866 Tainted: G B 4.19.0+ #78 [ 85.456413] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.465786] Call Trace: [ 85.468433] dump_stack+0x32d/0x480 [ 85.472111] panic+0x57e/0xb28 [ 85.475392] kmsan_report+0x300/0x300 [ 85.479232] __msan_warning+0x76/0xd0 [ 85.483087] linear_transfer+0x92d/0xca0 [ 85.487215] ? snd_pcm_plugin_build_linear+0xc40/0xc40 [ 85.492526] snd_pcm_plug_read_transfer+0x3bf/0x590 [ 85.497601] snd_pcm_oss_read+0xe6d/0x1cb0 [ 85.501911] ? snd_pcm_oss_unregister_minor+0x4b0/0x4b0 [ 85.507309] __vfs_read+0x1e2/0xb10 [ 85.510983] ? rw_verify_area+0x35e/0x580 [ 85.515171] vfs_read+0x380/0x6b0 [ 85.518668] __se_sys_read+0x17a/0x370 [ 85.522614] __x64_sys_read+0x4a/0x70 [ 85.526446] do_syscall_64+0xcf/0x110 [ 85.530278] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 85.535494] RIP: 0033:0x446379 [ 85.538712] Code: e8 0c e8 ff ff 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 7b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 85.557640] RSP: 002b:00007fcd5b97cda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 85.565374] RAX: ffffffffffffffda RBX: 00000000006dac38 RCX: 0000000000446379 executing program [ 85.572666] RDX: 0000000000000184 RSI: 0000000020002180 RDI: 0000000000000003 [ 85.579958] RBP: 00000000006dac30 R08: 0000000000000000 R09: 0000000000000000 [ 85.587249] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac3c [ 85.594547] R13: 7073642f7665642f R14: 00800000c0045002 R15: 0000000000000001 [ 85.602834] Kernel Offset: disabled [ 85.606473] Rebooting in 86400 seconds..