[ 38.554932][ T26] audit: type=1800 audit(1555607661.656:26): pid=7732 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 38.581852][ T26] audit: type=1800 audit(1555607661.666:27): pid=7732 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 38.605948][ T26] audit: type=1800 audit(1555607661.666:28): pid=7732 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 39.466948][ T26] audit: type=1800 audit(1555607662.596:29): pid=7732 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.9' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 50.915645][ T7884] ------------[ cut here ]------------ [ 50.921402][ T7884] generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) [ 50.921721][ T7884] WARNING: CPU: 1 PID: 7884 at block/blk-core.c:801 generic_make_request_checks+0x1c2f/0x2090 [ 50.931215][ T3876] kobject: 'nullb0' (000000001b709adb): fill_kobj_path: path = '/devices/virtual/block/nullb0' [ 50.941376][ T7884] Kernel panic - not syncing: panic_on_warn set ... [ 50.941394][ T7884] CPU: 1 PID: 7884 Comm: syz-executor104 Not tainted 5.1.0-rc5+ #74 [ 50.941401][ T7884] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.941406][ T7884] Call Trace: [ 50.941429][ T7884] dump_stack+0x172/0x1f0 [ 50.941447][ T7884] ? generic_make_request_checks+0x1bd0/0x2090 [ 50.941462][ T7884] panic+0x2cb/0x65c [ 50.941475][ T7884] ? __warn_printk+0xf3/0xf3 [ 50.941493][ T7884] ? generic_make_request_checks+0x1c2f/0x2090 [ 50.941507][ T7884] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.941523][ T7884] ? __warn.cold+0x5/0x45 [ 50.941538][ T7884] ? __warn+0xe8/0x1d0 [ 50.941555][ T7884] ? generic_make_request_checks+0x1c2f/0x2090 [ 50.941570][ T7884] __warn.cold+0x20/0x45 [ 50.941584][ T7884] ? vprintk_emit+0x1ce/0x6d0 [ 50.941598][ T7884] ? generic_make_request_checks+0x1c2f/0x2090 [ 50.941619][ T7884] report_bug+0x263/0x2b0 [ 51.045906][ T7884] do_error_trap+0x11b/0x200 [ 51.050502][ T7884] do_invalid_op+0x37/0x50 [ 51.055010][ T7884] ? generic_make_request_checks+0x1c2f/0x2090 [ 51.061308][ T7884] invalid_op+0x14/0x20 [ 51.065738][ T7884] RIP: 0010:generic_make_request_checks+0x1c2f/0x2090 [ 51.073276][ T7884] Code: 00 00 44 8b ab b4 04 00 00 48 8d b5 78 ff ff ff 4c 89 ff e8 c3 8a 05 00 48 c7 c7 60 02 a0 87 48 89 c6 44 89 ea e8 4f 96 25 fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 [ 51.093448][ T7884] RSP: 0018:ffff8880a90ff1e0 EFLAGS: 00010286 [ 51.099562][ T7884] RAX: 0000000000000000 RBX: ffff8880a34dc4c0 RCX: 0000000000000000 [ 51.107662][ T7884] RDX: 0000000000000000 RSI: ffffffff815afcb6 RDI: ffffed101521fe2e [ 51.115661][ T7884] RBP: ffff8880a90ff2e0 R08: ffff888098334380 R09: ffffed1015d23ef1 [ 51.123639][ T7884] R10: ffffed1015d23ef0 R11: ffff8880ae91f787 R12: ffff888091758d08 [ 51.131745][ T7884] R13: 0000000000000000 R14: 0000000000000001 R15: ffff888091758d00 [ 51.140311][ T7884] ? vprintk_func+0x86/0x189 [ 51.144931][ T7884] ? trace_event_raw_event_block_rq_requeue+0x640/0x640 [ 51.151874][ T7884] generic_make_request+0x24c/0x12d0 [ 51.157494][ T7884] ? find_held_lock+0x35/0x130 [ 51.162519][ T7884] ? bio_associate_blkg_from_css+0x4e5/0x990 [ 51.168533][ T7884] ? blk_queue_enter+0xe90/0xe90 [ 51.173474][ T7884] ? lock_downgrade+0x880/0x880 [ 51.178811][ T7884] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.185722][ T7884] submit_bio+0xba/0x480 [ 51.190267][ T7884] ? submit_bio+0xba/0x480 [ 51.194758][ T7884] ? generic_make_request+0x12d0/0x12d0 [ 51.200698][ T7884] ? bio_reset+0x3b0/0x3b0 [ 51.205114][ T7884] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 51.210937][ T7884] ? guard_bio_eod+0x295/0x6e0 [ 51.215789][ T7884] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 51.222186][ T7884] ? wbc_account_io+0x17e/0x2a0 [ 51.227043][ T7884] submit_bh_wbc+0x5f7/0x7f0 [ 51.231646][ T7884] __block_write_full_page+0x771/0x1020 [ 51.237183][ T7884] ? check_disk_change+0x140/0x140 [ 51.242461][ T7884] block_write_full_page+0x21f/0x270 [ 51.247768][ T7884] ? check_disk_change+0x140/0x140 [ 51.252872][ T7884] blkdev_writepage+0x25/0x30 [ 51.257544][ T7884] __writepage+0x67/0xe0 [ 51.261838][ T7884] write_cache_pages+0x8af/0x1560 [ 51.267052][ T7884] ? __wb_update_bandwidth+0x670/0x670 [ 51.272690][ T7884] ? clear_page_dirty_for_io+0xff0/0xff0 [ 51.278321][ T7884] ? lock_downgrade+0x880/0x880 [ 51.283166][ T7884] ? trace_hardirqs_off+0x62/0x220 [ 51.288342][ T7884] ? ep_poll_callback+0x730/0xe70 [ 51.293362][ T7884] ? find_held_lock+0x35/0x130 [ 51.298115][ T7884] ? ep_poll_callback+0x730/0xe70 [ 51.303169][ T7884] generic_writepages+0xed/0x160 [ 51.308116][ T7884] ? write_cache_pages+0x1560/0x1560 [ 51.313425][ T7884] ? __lock_acquire+0x548/0x3fb0 [ 51.318360][ T7884] ? mark_held_locks+0xf0/0xf0 [ 51.323115][ T7884] ? wbc_attach_and_unlock_inode+0x51a/0x930 [ 51.329220][ T7884] ? find_held_lock+0x35/0x130 [ 51.334244][ T7884] ? blkdev_readpages+0x40/0x40 [ 51.339221][ T7884] blkdev_writepages+0x1e/0x30 [ 51.344045][ T7884] do_writepages+0xfc/0x2a0 [ 51.348565][ T7884] ? page_writeback_cpu_online+0x20/0x20 [ 51.354242][ T7884] ? kasan_check_read+0x11/0x20 [ 51.359101][ T7884] ? do_raw_spin_unlock+0x57/0x270 [ 51.364210][ T7884] ? _raw_spin_unlock+0x2d/0x50 [ 51.369060][ T7884] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 51.375356][ T7884] ? wbc_attach_and_unlock_inode+0x5c4/0x930 [ 51.381356][ T7884] __filemap_fdatawrite_range+0x26d/0x340 [ 51.387084][ T7884] ? delete_from_page_cache_batch+0x1100/0x1100 [ 51.393337][ T7884] ? fsnotify+0x7e0/0xbc0 [ 51.397676][ T7884] filemap_write_and_wait+0x47/0xd0 [ 51.402882][ T7884] __blkdev_put+0x204/0x810 [ 51.407394][ T7884] ? bd_set_size+0xb0/0xb0 [ 51.411829][ T7884] ? wait_for_completion+0x440/0x440 [ 51.417219][ T7884] blkdev_put+0x98/0x560 [ 51.421467][ T7884] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 51.427764][ T7884] ? blkdev_put+0x560/0x560 [ 51.432455][ T7884] blkdev_close+0x8b/0xb0 [ 51.436930][ T7884] __fput+0x2e5/0x8d0 [ 51.441019][ T7884] ____fput+0x16/0x20 [ 51.445005][ T7884] task_work_run+0x14a/0x1c0 [ 51.449592][ T7884] do_exit+0x90a/0x2fa0 [ 51.453776][ T7884] ? __do_page_fault+0x623/0xda0 [ 51.458718][ T7884] ? mm_update_next_owner+0x640/0x640 [ 51.464087][ T7884] ? tomoyo_file_ioctl+0x23/0x30 [ 51.469021][ T7884] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.475263][ T7884] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 51.480718][ T7884] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 51.486185][ T7884] do_group_exit+0x135/0x370 [ 51.491169][ T7884] __x64_sys_exit_group+0x44/0x50 [ 51.496304][ T7884] do_syscall_64+0x103/0x610 [ 51.500914][ T7884] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.506804][ T7884] RIP: 0033:0x43edf8 [ 51.511166][ T7884] Code: Bad RIP value. [ 51.515229][ T7884] RSP: 002b:00007fffdc7e6e08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 51.523638][ T7884] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043edf8 [ 51.531625][ T7884] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 51.539720][ T7884] RBP: 00000000004be608 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 51.547689][ T7884] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001 [ 51.555675][ T7884] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 51.564787][ T7884] Kernel Offset: disabled [ 51.569198][ T7884] Rebooting in 86400 seconds..