[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 72.348519] audit: type=1800 audit(1547892481.411:25): pid=9680 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 72.367823] audit: type=1800 audit(1547892481.411:26): pid=9680 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 72.387286] audit: type=1800 audit(1547892481.411:27): pid=9680 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 '10.128.10.43' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program syzkaller login: [ 83.105730] ================================================================== [ 83.113131] BUG: KMSAN: uninit-value in linear_transfer+0xa1b/0xc50 [ 83.119655] CPU: 0 PID: 9850 Comm: syz-executor025 Not tainted 5.0.0-rc1+ #7 [ 83.126917] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.136266] Call Trace: [ 83.138869] dump_stack+0x173/0x1d0 [ 83.142496] kmsan_report+0x12e/0x2a0 [ 83.146295] __msan_warning+0x82/0xf0 [ 83.150228] linear_transfer+0xa1b/0xc50 [ 83.154299] ? snd_pcm_plugin_build_linear+0xc00/0xc00 [ 83.159568] snd_pcm_plug_read_transfer+0x3bf/0x590 [ 83.164695] snd_pcm_oss_read+0xa4a/0x1960 [ 83.168938] do_iter_read+0x8e0/0xe10 [ 83.172747] ? snd_pcm_oss_unregister_minor+0x4b0/0x4b0 [ 83.178115] do_readv+0x2a7/0x620 [ 83.181573] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 83.187138] ? prepare_exit_to_usermode+0x114/0x420 [ 83.192287] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 83.197476] __se_sys_readv+0x9b/0xb0 [ 83.201286] __x64_sys_readv+0x4a/0x70 [ 83.205177] do_syscall_64+0xbc/0xf0 [ 83.208887] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 83.214068] RIP: 0033:0x449f49 [ 83.217262] Code: e8 6c b4 02 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 4b cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 83.236174] RSP: 002b:00007f1bc0249da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 83.243877] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000449f49 [ 83.251137] RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000003 [ 83.258398] RBP: 00000000006dbc40 R08: 00007f1bc024a700 R09: 0000000000000000 [ 83.265661] R10: 00007f1bc024a700 R11: 0000000000000246 R12: 00000000006dbc4c [ 83.272922] R13: 7073642f7665642f R14: 00007f1bc024a9c0 R15: 00000000006dbd2c [ 83.280203] [ 83.281848] Uninit was created at: [ 83.285385] No stack [ 83.287692] ================================================================== [ 83.295042] Disabling lock debugging due to kernel taint [ 83.300479] Kernel panic - not syncing: panic_on_warn set ... [ 83.306355] CPU: 0 PID: 9850 Comm: syz-executor025 Tainted: G B 5.0.0-rc1+ #7 [ 83.314926] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.324305] Call Trace: [ 83.326899] dump_stack+0x173/0x1d0 [ 83.330532] panic+0x3d1/0xb01 [ 83.333735] kmsan_report+0x293/0x2a0 [ 83.337537] __msan_warning+0x82/0xf0 [ 83.341340] linear_transfer+0xa1b/0xc50 [ 83.345501] ? snd_pcm_plugin_build_linear+0xc00/0xc00 [ 83.350769] snd_pcm_plug_read_transfer+0x3bf/0x590 [ 83.355788] snd_pcm_oss_read+0xa4a/0x1960 [ 83.360051] do_iter_read+0x8e0/0xe10 [ 83.363894] ? snd_pcm_oss_unregister_minor+0x4b0/0x4b0 [ 83.369267] do_readv+0x2a7/0x620 [ 83.372743] ? __msan_metadata_ptr_for_store_4+0x13/0x20 [ 83.378191] ? prepare_exit_to_usermode+0x114/0x420 [ 83.383197] ? kmsan_get_shadow_origin_ptr+0x60/0x440 [ 83.388383] __se_sys_readv+0x9b/0xb0 [ 83.392187] __x64_sys_readv+0x4a/0x70 [ 83.396072] do_syscall_64+0xbc/0xf0 [ 83.399786] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 83.404965] RIP: 0033:0x449f49 [ 83.408152] Code: e8 6c b4 02 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 4b cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 83.427045] RSP: 002b:00007f1bc0249da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 [ 83.434748] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000449f49 [ 83.442026] RDX: 0000000000000001 RSI: 0000000020000180 RDI: 0000000000000003 [ 83.449287] RBP: 00000000006dbc40 R08: 00007f1bc024a700 R09: 0000000000000000 [ 83.456550] R10: 00007f1bc024a700 R11: 0000000000000246 R12: 00000000006dbc4c [ 83.463869] R13: 7073642f7665642f R14: 00007f1bc024a9c0 R15: 00000000006dbd2c [ 83.472636] Kernel Offset: disabled [ 83.476266] Rebooting in 86400 seconds..