[?25l[?1c7[ ok 8[?25h[?0c. [ 82.903970][ T30] audit: type=1800 audit(1559574591.956:25): pid=11588 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 82.928548][ T30] audit: type=1800 audit(1559574591.976:26): pid=11588 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 82.965438][ T30] audit: type=1800 audit(1559574592.006:27): pid=11588 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 '10.128.0.122' (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 syzkaller login: [ 96.650231][T11774] ================================================================== [ 96.658360][T11774] BUG: KMSAN: kernel-infoleak in copyout+0x16b/0x1f0 [ 96.665044][T11774] CPU: 0 PID: 11774 Comm: blkid Not tainted 5.1.0+ #1 [ 96.671817][T11774] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 96.681891][T11774] Call Trace: [ 96.685206][T11774] dump_stack+0x191/0x1f0 [ 96.689561][T11774] kmsan_report+0x130/0x2a0 [ 96.694086][T11774] kmsan_internal_check_memory+0x974/0xa80 executing program executing program executing program [ 96.699905][T11774] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 96.706013][T11774] kmsan_copy_to_user+0xa9/0xb0 [ 96.710903][T11774] copyout+0x16b/0x1f0 [ 96.715032][T11774] copy_page_to_iter+0x654/0x1910 [ 96.720128][T11774] generic_file_read_iter+0x2979/0x3e70 [ 96.725788][T11774] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 96.731725][T11774] blkdev_read_iter+0x20d/0x270 [ 96.736603][T11774] ? blkdev_write_iter+0x650/0x650 [ 96.741731][T11774] __vfs_read+0x9af/0xbe0 [ 96.746120][T11774] vfs_read+0x359/0x6f0 [ 96.750313][T11774] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 96.756230][T11774] ksys_read+0x1c5/0x440 [ 96.760512][T11774] __se_sys_read+0x92/0xb0 [ 96.764955][T11774] __x64_sys_read+0x4a/0x70 [ 96.769485][T11774] do_syscall_64+0xbc/0xf0 [ 96.773926][T11774] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 96.779832][T11774] RIP: 0033:0x7f9796a34310 [ 96.784261][T11774] Code: 73 01 c3 48 8b 0d 28 4b 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d e5 a2 2b 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 6e 8a 01 00 48 89 04 24 [ 96.803897][T11774] RSP: 002b:00007ffc0f1e87e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 96.812339][T11774] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9796a34310 [ 96.820334][T11774] RDX: 0000000000000100 RSI: 0000000001508df8 RDI: 0000000000000003 [ 96.828306][T11774] RBP: 0000000001508dd0 R08: 0000000000000028 R09: 0000000001680000 [ 96.836284][T11774] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001508030 [ 96.844270][T11774] R13: 0000000000000100 R14: 0000000001508080 R15: 0000000001508de8 [ 96.852261][T11774] [ 96.854591][T11774] Uninit was created at: [ 96.858847][T11774] kmsan_save_stack_with_flags+0x7a/0x130 [ 96.864576][T11774] kmsan_internal_alloc_meta_for_pages+0x10f/0x500 [ 96.871078][T11774] kmsan_alloc_page+0x7a/0xf0 [ 96.875775][T11774] __alloc_pages_nodemask+0x143d/0x5e90 [ 96.881368][T11774] alloc_pages_current+0x6a0/0x9b0 [ 96.886479][T11774] __page_cache_alloc+0x95/0x320 [ 96.891424][T11774] pagecache_get_page+0x443/0x11f0 [ 96.896542][T11774] grab_cache_page_write_begin+0x100/0x180 [ 96.902355][T11774] block_write_begin+0xdd/0x340 [ 96.907210][T11774] blkdev_write_begin+0xf5/0x110 [ 96.912159][T11774] generic_perform_write+0x424/0x990 [ 96.917446][T11774] __generic_file_write_iter+0x421/0xa30 [ 96.923112][T11774] blkdev_write_iter+0x3ef/0x650 [ 96.928057][T11774] do_iter_readv_writev+0x9b3/0xbe0 [ 96.933260][T11774] do_iter_write+0x304/0xdc0 [ 96.937856][T11774] do_writev+0x3ba/0x8e0 [ 96.942121][T11774] __se_sys_writev+0x9b/0xb0 [ 96.946732][T11774] __x64_sys_writev+0x4a/0x70 [ 96.951415][T11774] do_syscall_64+0xbc/0xf0 [ 96.955836][T11774] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 96.961720][T11774] [ 96.964077][T11774] Bytes 4-255 of 256 are uninitialized [ 96.970028][T11774] Memory access of size 256 starts at ffff8880bba12000 [ 96.976875][T11774] Data copied to user address 0000000001508df8 [ 96.983049][T11774] ================================================================== [ 96.991130][T11774] Disabling lock debugging due to kernel taint [ 96.997285][T11774] Kernel panic - not syncing: panic_on_warn set ... [ 97.003880][T11774] CPU: 0 PID: 11774 Comm: blkid Tainted: G B 5.1.0+ #1 [ 97.012029][T11774] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 97.022091][T11774] Call Trace: [ 97.025388][T11774] dump_stack+0x191/0x1f0 [ 97.029748][T11774] panic+0x3ca/0xafe [ 97.033744][T11774] kmsan_report+0x298/0x2a0 [ 97.038296][T11774] kmsan_internal_check_memory+0x974/0xa80 [ 97.044132][T11774] ? __msan_metadata_ptr_for_load_1+0x10/0x20 [ 97.050228][T11774] kmsan_copy_to_user+0xa9/0xb0 [ 97.055134][T11774] copyout+0x16b/0x1f0 [ 97.059237][T11774] copy_page_to_iter+0x654/0x1910 [ 97.064313][T11774] generic_file_read_iter+0x2979/0x3e70 [ 97.069951][T11774] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 97.075873][T11774] blkdev_read_iter+0x20d/0x270 [ 97.080767][T11774] ? blkdev_write_iter+0x650/0x650 [ 97.085920][T11774] __vfs_read+0x9af/0xbe0 [ 97.090320][T11774] vfs_read+0x359/0x6f0 [ 97.094511][T11774] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 97.100455][T11774] ksys_read+0x1c5/0x440 [ 97.104746][T11774] __se_sys_read+0x92/0xb0 [ 97.109198][T11774] __x64_sys_read+0x4a/0x70 [ 97.113711][T11774] do_syscall_64+0xbc/0xf0 [ 97.118162][T11774] entry_SYSCALL_64_after_hwframe+0x63/0xe7 [ 97.124062][T11774] RIP: 0033:0x7f9796a34310 [ 97.128497][T11774] Code: 73 01 c3 48 8b 0d 28 4b 2b 00 31 d2 48 29 c2 64 89 11 48 83 c8 ff eb ea 90 90 83 3d e5 a2 2b 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 6e 8a 01 00 48 89 04 24 [ 97.148103][T11774] RSP: 002b:00007ffc0f1e87e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 97.156520][T11774] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9796a34310 [ 97.164489][T11774] RDX: 0000000000000100 RSI: 0000000001508df8 RDI: 0000000000000003 [ 97.172461][T11774] RBP: 0000000001508dd0 R08: 0000000000000028 R09: 0000000001680000 [ 97.180438][T11774] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000001508030 [ 97.188414][T11774] R13: 0000000000000100 R14: 0000000001508080 R15: 0000000001508de8 [ 97.197455][T11774] Kernel Offset: disabled [ 97.201787][T11774] Rebooting in 86400 seconds..