[ 45.764513][ T26] audit: type=1800 audit(1575016711.600:26): pid=7894 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 45.797369][ T26] audit: type=1800 audit(1575016711.610:27): pid=7894 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 45.834598][ T26] audit: type=1800 audit(1575016711.610:28): pid=7894 uid=0 auid=4294967295 ses=4294967295 subj=_ 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. [ 46.538952][ T26] audit: type=1800 audit(1575016712.390:29): pid=7894 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.160' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.047299][ T26] kauditd_printk_skb: 1 callbacks suppressed [ 54.047308][ T26] audit: type=1804 audit(1575016719.900:31): pid=8046 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor278" name="/root/file0" dev="sda1" ino=16485 res=1 [ 54.081361][ T8046] ------------[ cut here ]------------ [ 54.087157][ T8046] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 54.097453][ T8046] WARNING: CPU: 0 PID: 8046 at block/blk-core.c:803 generic_make_request_checks+0x636/0x1540 [ 54.107720][ T8046] Kernel panic - not syncing: panic_on_warn set ... [ 54.114330][ T8046] CPU: 0 PID: 8046 Comm: syz-executor278 Not tainted 5.4.0-syzkaller #0 [ 54.122669][ T8046] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.132810][ T8046] Call Trace: [ 54.136106][ T8046] dump_stack+0x1fb/0x318 [ 54.140531][ T8046] panic+0x264/0x7a9 [ 54.144412][ T8046] ? __warn+0x105/0x210 [ 54.148680][ T8046] ? generic_make_request_checks+0x636/0x1540 [ 54.155272][ T8046] __warn+0x20e/0x210 [ 54.159251][ T8046] ? generic_make_request_checks+0x636/0x1540 [ 54.165405][ T8046] report_bug+0x1b6/0x2f0 [ 54.169734][ T8046] ? generic_make_request_checks+0x636/0x1540 [ 54.175789][ T8046] do_error_trap+0xd7/0x440 [ 54.180278][ T8046] do_invalid_op+0x36/0x40 [ 54.184680][ T8046] ? generic_make_request_checks+0x636/0x1540 [ 54.190749][ T8046] invalid_op+0x23/0x30 [ 54.194923][ T8046] RIP: 0010:generic_make_request_checks+0x636/0x1540 [ 54.201594][ T8046] Code: 5c 05 00 00 4c 89 f8 48 c1 e8 03 8a 04 08 84 c0 0f 85 f8 0e 00 00 41 8b 17 48 c7 c7 61 59 61 88 4c 89 f6 31 c0 e8 8a 3c 0f fe <0f> 0b e9 2d fc ff ff e8 ee 22 3d fe c6 05 14 ac a3 05 01 48 c7 c7 [ 54.222407][ T8046] RSP: 0018:ffff888093f6f450 EFLAGS: 00010246 [ 54.229091][ T8046] RAX: 300ac1facb3df500 RBX: 0000000000000001 RCX: ffff8880a41be5c0 [ 54.237050][ T8046] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 54.245018][ T8046] RBP: ffff888093f6f510 R08: ffffffff815deeb4 R09: ffffed1015d465d8 [ 54.254440][ T8046] R10: ffffed1015d465d8 R11: 0000000000000000 R12: 1ffff110135e5c41 [ 54.262624][ T8046] R13: ffff88809af2e208 R14: ffff888093f6f4b0 R15: ffff8880a304b55c [ 54.270619][ T8046] ? vprintk_emit+0x2d4/0x3a0 [ 54.275750][ T8046] ? rcu_lock_release+0xd/0x30 [ 54.280503][ T8046] generic_make_request+0x33/0x980 [ 54.285601][ T8046] ? rcu_lock_release+0xd/0x30 [ 54.290349][ T8046] submit_bio+0x26b/0x540 [ 54.294766][ T8046] ? wbc_account_cgroup_owner+0x110/0x340 [ 54.300730][ T8046] ? bio_associate_blkg_from_css+0x1c4/0x1d0 [ 54.306721][ T8046] submit_bh_wbc+0x619/0x700 [ 54.311399][ T8046] __block_write_full_page+0x943/0x1070 [ 54.317720][ T8046] ? blkdev_direct_IO+0xd0/0xd0 [ 54.322550][ T8046] ? mark_buffer_write_io_error+0x160/0x160 [ 54.328790][ T8046] block_write_full_page+0x1a4/0x220 [ 54.334071][ T8046] ? blkdev_direct_IO+0xd0/0xd0 [ 54.339049][ T8046] blkdev_writepage+0x24/0x30 [ 54.343735][ T8046] __writepage+0x63/0xd0 [ 54.348864][ T8046] write_cache_pages+0x94a/0xe70 [ 54.353788][ T8046] ? generic_writepages+0xd0/0xd0 [ 54.358994][ T8046] generic_writepages+0x93/0xd0 [ 54.363915][ T8046] blkdev_writepages+0x1d/0x30 [ 54.368744][ T8046] ? blkdev_readpage+0x20/0x20 [ 54.373489][ T8046] do_writepages+0xfb/0x1f0 [ 54.377976][ T8046] ? wbc_attach_and_unlock_inode+0x3f0/0x5d0 [ 54.384049][ T8046] __filemap_fdatawrite_range+0x2c2/0x360 [ 54.389774][ T8046] filemap_write_and_wait+0xca/0x160 [ 54.395076][ T8046] __blkdev_put+0x1a2/0x6d0 [ 54.399588][ T8046] ? __mutex_unlock_slowpath+0x13c/0x5b0 [ 54.405253][ T8046] blkdev_put+0x2c8/0x3b0 [ 54.409582][ T8046] blkdev_close+0x7b/0xa0 [ 54.413999][ T8046] ? blkdev_open+0x2c0/0x2c0 [ 54.418585][ T8046] __fput+0x2e4/0x740 [ 54.422553][ T8046] ____fput+0x15/0x20 [ 54.426518][ T8046] task_work_run+0x17e/0x1b0 [ 54.431095][ T8046] do_exit+0x5cc/0x20f0 [ 54.435238][ T8046] ? __fpregs_load_activate+0x195/0x220 [ 54.440769][ T8046] do_group_exit+0x15c/0x2b0 [ 54.445360][ T8046] __do_sys_exit_group+0x17/0x20 [ 54.450278][ T8046] __se_sys_exit_group+0x14/0x20 [ 54.455197][ T8046] __x64_sys_exit_group+0x3b/0x40 [ 54.460233][ T8046] do_syscall_64+0xf7/0x1c0 [ 54.464755][ T8046] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.470651][ T8046] RIP: 0033:0x442c38 [ 54.474910][ T8046] Code: Bad RIP value. [ 54.479087][ T8046] RSP: 002b:00007ffdd6d02e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 54.487509][ T8046] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442c38 [ 54.495671][ T8046] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 54.503767][ T8046] RBP: 00000000004c2548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 54.511735][ T8046] R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000000001 [ 54.519959][ T8046] R13: 00000000006d41a0 R14: 0000000000000000 R15: 0000000000000000 [ 54.530000][ T8046] Kernel Offset: disabled [ 54.534522][ T8046] Rebooting in 86400 seconds..