[ 42.671568][ T23] audit: type=1800 audit(1575018427.933:26): pid=7938 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 42.722480][ T23] audit: type=1800 audit(1575018427.933:27): pid=7938 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 42.758636][ T23] audit: type=1800 audit(1575018427.933:28): pid=7938 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. [ 43.329915][ T23] audit: type=1800 audit(1575018428.613:29): pid=7938 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 '10.128.10.5' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 63.173979][ T23] kauditd_printk_skb: 1 callbacks suppressed [ 63.173986][ T23] audit: type=1804 audit(1575018448.463:31): pid=8089 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor450" name="/root/file0" dev="sda1" ino=16484 res=1 [ 63.204279][ T8089] ------------[ cut here ]------------ [ 63.209836][ T8089] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 63.219700][ T8089] WARNING: CPU: 1 PID: 8089 at block/blk-core.c:803 generic_make_request_checks+0x636/0x1540 [ 63.229917][ T8089] Kernel panic - not syncing: panic_on_warn set ... [ 63.236483][ T8089] CPU: 1 PID: 8089 Comm: syz-executor450 Not tainted 5.4.0-syzkaller #0 [ 63.244772][ T8089] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.254835][ T8089] Call Trace: [ 63.258102][ T8089] dump_stack+0x1fb/0x318 [ 63.262441][ T8089] panic+0x264/0x7a9 [ 63.266342][ T8089] ? __warn+0x105/0x210 [ 63.270504][ T8089] ? generic_make_request_checks+0x636/0x1540 [ 63.276541][ T8089] __warn+0x20e/0x210 [ 63.280506][ T8089] ? generic_make_request_checks+0x636/0x1540 [ 63.286544][ T8089] report_bug+0x1b6/0x2f0 [ 63.290843][ T8089] ? generic_make_request_checks+0x636/0x1540 [ 63.296884][ T8089] do_error_trap+0xd7/0x440 [ 63.301371][ T8089] do_invalid_op+0x36/0x40 [ 63.305762][ T8089] ? generic_make_request_checks+0x636/0x1540 [ 63.311801][ T8089] invalid_op+0x23/0x30 [ 63.315928][ T8089] RIP: 0010:generic_make_request_checks+0x636/0x1540 [ 63.322573][ T8089] 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 [ 63.342236][ T8089] RSP: 0018:ffff888095d0f450 EFLAGS: 00010246 [ 63.348283][ T8089] RAX: 10811cf6614d0700 RBX: 0000000000000001 RCX: ffff888095138540 [ 63.356237][ T8089] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 63.364247][ T8089] RBP: ffff888095d0f510 R08: ffffffff815deeb4 R09: ffffed1015d665d8 [ 63.372200][ T8089] R10: ffffed1015d665d8 R11: 0000000000000000 R12: 1ffff11013018901 [ 63.380143][ T8089] R13: ffff8880980c4808 R14: ffff888095d0f4b0 R15: ffff8880a303255c [ 63.388105][ T8089] ? vprintk_emit+0x2d4/0x3a0 [ 63.392760][ T8089] ? rcu_lock_release+0xd/0x30 [ 63.397495][ T8089] generic_make_request+0x33/0x980 [ 63.402580][ T8089] ? rcu_lock_release+0xd/0x30 [ 63.407490][ T8089] submit_bio+0x26b/0x540 [ 63.411825][ T8089] ? wbc_account_cgroup_owner+0x110/0x340 [ 63.417547][ T8089] ? bio_associate_blkg_from_css+0x1c4/0x1d0 [ 63.423508][ T8089] submit_bh_wbc+0x619/0x700 [ 63.428079][ T8089] __block_write_full_page+0x943/0x1070 [ 63.433599][ T8089] ? blkdev_direct_IO+0xd0/0xd0 [ 63.438422][ T8089] ? mark_buffer_write_io_error+0x160/0x160 [ 63.444321][ T8089] block_write_full_page+0x1a4/0x220 [ 63.449588][ T8089] ? blkdev_direct_IO+0xd0/0xd0 [ 63.454409][ T8089] blkdev_writepage+0x24/0x30 [ 63.459055][ T8089] __writepage+0x63/0xd0 [ 63.463268][ T8089] write_cache_pages+0x94a/0xe70 [ 63.468187][ T8089] ? generic_writepages+0xd0/0xd0 [ 63.473202][ T8089] generic_writepages+0x93/0xd0 [ 63.478023][ T8089] blkdev_writepages+0x1d/0x30 [ 63.482754][ T8089] ? blkdev_readpage+0x20/0x20 [ 63.487499][ T8089] do_writepages+0xfb/0x1f0 [ 63.491994][ T8089] ? wbc_attach_and_unlock_inode+0x3f0/0x5d0 [ 63.497947][ T8089] __filemap_fdatawrite_range+0x2c2/0x360 [ 63.503696][ T8089] filemap_write_and_wait+0xca/0x160 [ 63.508970][ T8089] __blkdev_put+0x1a2/0x6d0 [ 63.513462][ T8089] ? __mutex_unlock_slowpath+0x13c/0x5b0 [ 63.519114][ T8089] blkdev_put+0x2c8/0x3b0 [ 63.523418][ T8089] blkdev_close+0x7b/0xa0 [ 63.527716][ T8089] ? blkdev_open+0x2c0/0x2c0 [ 63.532278][ T8089] __fput+0x2e4/0x740 [ 63.536281][ T8089] ____fput+0x15/0x20 [ 63.540233][ T8089] task_work_run+0x17e/0x1b0 [ 63.544795][ T8089] do_exit+0x5cc/0x20f0 [ 63.548949][ T8089] ? __fpregs_load_activate+0x195/0x220 [ 63.554468][ T8089] do_group_exit+0x15c/0x2b0 [ 63.559031][ T8089] __do_sys_exit_group+0x17/0x20 [ 63.563978][ T8089] __se_sys_exit_group+0x14/0x20 [ 63.568891][ T8089] __x64_sys_exit_group+0x3b/0x40 [ 63.573888][ T8089] do_syscall_64+0xf7/0x1c0 [ 63.578362][ T8089] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 63.584315][ T8089] RIP: 0033:0x442c38 [ 63.588180][ T8089] Code: 00 00 ea dc 40 00 00 00 00 00 c8 de 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 dc 40 00 00 00 00 00 ea dc 40 00 00 00 00 00 ea dc 40 00 00 00 [ 63.607843][ T8089] RSP: 002b:00007ffd25e47dd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 63.616224][ T8089] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442c38 [ 63.624168][ T8089] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 63.632110][ T8089] RBP: 00000000004c2548 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 63.640052][ T8089] R10: 00000000004002e0 R11: 0000000000000246 R12: 0000000000000001 [ 63.648021][ T8089] R13: 00000000006d41a0 R14: 0000000000000000 R15: 0000000000000000 [ 63.657438][ T8089] Kernel Offset: disabled [ 63.661813][ T8089] Rebooting in 86400 seconds..