[ 37.573187][ T26] audit: type=1800 audit(1555607166.805:27): pid=7607 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 37.594955][ T26] audit: type=1800 audit(1555607166.805:28): pid=7607 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. [ 38.611228][ T26] audit: type=1800 audit(1555607167.895:29): pid=7607 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 [ 38.631424][ T26] audit: type=1800 audit(1555607167.895:30): pid=7607 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.56' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 49.245290][ T7759] ------------[ cut here ]------------ [ 49.250955][ T7759] generic_make_request: Trying to write to read-only block-device nullb0 (partno 0) [ 49.261321][ T7759] WARNING: CPU: 0 PID: 7759 at block/blk-core.c:801 generic_make_request_checks+0x1c2f/0x2090 [ 49.273739][ T7759] Kernel panic - not syncing: panic_on_warn set ... [ 49.280323][ T7759] CPU: 0 PID: 7759 Comm: syz-executor401 Not tainted 5.1.0-rc5-next-20190418 #28 [ 49.289429][ T7759] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.299473][ T7759] Call Trace: [ 49.302761][ T7759] dump_stack+0x172/0x1f0 [ 49.307100][ T7759] ? generic_make_request_checks+0x1b90/0x2090 [ 49.313249][ T7759] panic+0x2cb/0x72b [ 49.317144][ T7759] ? __warn_printk+0xf3/0xf3 [ 49.321737][ T7759] ? generic_make_request_checks+0x1c2f/0x2090 [ 49.327886][ T7759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.334129][ T7759] ? __warn.cold+0x5/0x46 [ 49.338451][ T7759] ? __warn+0xe8/0x1d0 [ 49.342523][ T7759] ? generic_make_request_checks+0x1c2f/0x2090 [ 49.348674][ T7759] __warn.cold+0x20/0x46 [ 49.352913][ T7759] ? vprintk_emit+0x1ea/0x700 [ 49.357584][ T7759] ? generic_make_request_checks+0x1c2f/0x2090 [ 49.363732][ T7759] report_bug+0x263/0x2b0 [ 49.368059][ T7759] do_error_trap+0x11b/0x200 [ 49.372652][ T7759] do_invalid_op+0x37/0x50 [ 49.377061][ T7759] ? generic_make_request_checks+0x1c2f/0x2090 [ 49.383215][ T7759] invalid_op+0x14/0x20 [ 49.387378][ T7759] RIP: 0010:generic_make_request_checks+0x1c2f/0x2090 [ 49.394135][ T7759] Code: 00 00 44 8b ab b4 04 00 00 48 8d b5 78 ff ff ff 4c 89 ff e8 a3 86 05 00 48 c7 c7 e0 a6 a0 87 48 89 c6 44 89 ea e8 4f 4b 22 fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 [ 49.413757][ T7759] RSP: 0018:ffff88808d0bf1e0 EFLAGS: 00010286 [ 49.419842][ T7759] RAX: 0000000000000000 RBX: ffff8880a35bd540 RCX: 0000000000000000 [ 49.427806][ T7759] RDX: 0000000000000000 RSI: ffffffff815b2ba6 RDI: ffffed1011a17e2e [ 49.435771][ T7759] RBP: ffff88808d0bf2e0 R08: ffff88808e1a85c0 R09: ffffed1015d05211 [ 49.443736][ T7759] R10: ffffed1015d05210 R11: ffff8880ae829087 R12: ffff88808e18f188 [ 49.451695][ T7759] R13: 0000000000000000 R14: 0000000000000001 R15: ffff88808e18f180 [ 49.459671][ T7759] ? vprintk_func+0x86/0x189 [ 49.464267][ T7759] ? trace_event_raw_event_block_rq_requeue+0x640/0x640 [ 49.471217][ T7759] generic_make_request+0x24c/0x12d0 [ 49.476492][ T7759] ? find_held_lock+0x35/0x130 [ 49.481250][ T7759] ? bio_associate_blkg_from_css+0x4e5/0x990 [ 49.487227][ T7759] ? blk_queue_enter+0xe90/0xe90 [ 49.492160][ T7759] ? lock_downgrade+0x880/0x880 [ 49.497015][ T7759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.503252][ T7759] submit_bio+0xba/0x480 [ 49.507535][ T7759] ? submit_bio+0xba/0x480 [ 49.511975][ T7759] ? generic_make_request+0x12d0/0x12d0 [ 49.517513][ T7759] ? bio_reset+0x3b0/0x3b0 [ 49.521926][ T7759] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 49.527640][ T7759] ? guard_bio_eod+0x295/0x6c0 [ 49.532395][ T7759] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 49.538117][ T7759] ? wbc_account_io+0x17e/0x2a0 [ 49.542981][ T7759] submit_bh_wbc+0x5f7/0x7f0 [ 49.547577][ T7759] __block_write_full_page+0x771/0x1020 [ 49.553125][ T7759] ? check_disk_change+0x140/0x140 [ 49.558242][ T7759] block_write_full_page+0x21f/0x270 [ 49.563528][ T7759] ? check_disk_change+0x140/0x140 [ 49.568677][ T7759] blkdev_writepage+0x25/0x30 [ 49.573348][ T7759] __writepage+0x67/0xe0 [ 49.577591][ T7759] write_cache_pages+0x8af/0x1560 [ 49.582615][ T7759] ? __wb_update_bandwidth+0x670/0x670 [ 49.588082][ T7759] ? clear_page_dirty_for_io+0xdc0/0xdc0 [ 49.593715][ T7759] ? lock_downgrade+0x880/0x880 [ 49.598563][ T7759] ? trace_hardirqs_off+0x62/0x220 [ 49.603669][ T7759] ? ep_poll_callback+0x730/0xe70 [ 49.608685][ T7759] ? find_held_lock+0x35/0x130 [ 49.613453][ T7759] ? ep_poll_callback+0x730/0xe70 [ 49.618478][ T7759] generic_writepages+0xed/0x160 [ 49.623445][ T7759] ? write_cache_pages+0x1560/0x1560 [ 49.628726][ T7759] ? __lock_acquire+0x548/0x3fb0 [ 49.633659][ T7759] ? mark_held_locks+0xf0/0xf0 [ 49.638425][ T7759] ? wbc_attach_and_unlock_inode+0x51a/0x930 [ 49.644398][ T7759] ? find_held_lock+0x35/0x130 [ 49.649158][ T7759] ? blkdev_readpages+0x40/0x40 [ 49.654000][ T7759] blkdev_writepages+0x1e/0x30 [ 49.658762][ T7759] do_writepages+0xfc/0x2a0 [ 49.663264][ T7759] ? page_writeback_cpu_online+0x20/0x20 [ 49.668932][ T7759] ? kasan_check_read+0x11/0x20 [ 49.673787][ T7759] ? do_raw_spin_unlock+0x57/0x270 [ 49.678909][ T7759] ? _raw_spin_unlock+0x2d/0x50 [ 49.683782][ T7759] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.690017][ T7759] ? wbc_attach_and_unlock_inode+0x5c4/0x930 [ 49.695993][ T7759] __filemap_fdatawrite_range+0x26d/0x340 [ 49.701709][ T7759] ? delete_from_page_cache_batch+0xf90/0xf90 [ 49.707781][ T7759] ? fsnotify+0x7e0/0xbc0 [ 49.712158][ T7759] filemap_write_and_wait+0x47/0xd0 [ 49.717353][ T7759] __blkdev_put+0x204/0x810 [ 49.721865][ T7759] ? bd_set_size+0xb0/0xb0 [ 49.726276][ T7759] ? wait_for_completion+0x440/0x440 [ 49.731576][ T7759] blkdev_put+0x98/0x560 [ 49.735810][ T7759] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 49.742052][ T7759] ? blkdev_put+0x560/0x560 [ 49.746550][ T7759] blkdev_close+0x8b/0xb0 [ 49.750874][ T7759] __fput+0x2e5/0x8d0 [ 49.754860][ T7759] ____fput+0x16/0x20 [ 49.758838][ T7759] task_work_run+0x14a/0x1c0 [ 49.763444][ T7759] do_exit+0x90a/0x2fa0 [ 49.767602][ T7759] ? mm_update_next_owner+0x640/0x640 [ 49.772973][ T7759] ? tomoyo_file_ioctl+0x23/0x30 [ 49.777933][ T7759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.784185][ T7759] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 49.789649][ T7759] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 49.795147][ T7759] do_group_exit+0x135/0x370 [ 49.799743][ T7759] __x64_sys_exit_group+0x44/0x50 [ 49.804780][ T7759] do_syscall_64+0x103/0x670 [ 49.809378][ T7759] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.815275][ T7759] RIP: 0033:0x43edf8 [ 49.819165][ T7759] Code: c9 01 c0 29 c1 83 c1 30 42 88 0c 06 44 0f b6 47 08 44 89 c0 f6 ea 66 c1 e8 08 89 c1 44 89 c0 c0 f8 07 c0 f9 02 29 c1 41 8d 43 <03> 8d 0c 89 48 98 01 c9 41 29 c8 41 83 c0 30 46 88 04 0e c6 04 06 [ 49.838808][ T7759] RSP: 002b:00007ffe565c3698 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 49.847211][ T7759] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043edf8 [ 49.855214][ T7759] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 49.863185][ T7759] RBP: 00000000004be608 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 49.871157][ T7759] R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001 [ 49.879121][ T7759] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 49.887995][ T7759] Kernel Offset: disabled [ 49.892372][ T7759] Rebooting in 86400 seconds..