[ 36.893941] audit: type=1800 audit(1551578709.026:27): pid=7503 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 36.914973] audit: type=1800 audit(1551578709.026:28): pid=7503 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. [ 37.825817] audit: type=1800 audit(1551578710.016:29): pid=7503 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 37.844486] audit: type=1800 audit(1551578710.016:30): pid=7503 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.138' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.782518] ------------[ cut here ]------------ [ 45.788577] generic_make_request: Trying to write to read-only block-device loop0 (partno 0) [ 45.798035] WARNING: CPU: 0 PID: 7659 at block/blk-core.c:802 generic_make_request_checks+0x1c8a/0x2140 [ 45.807553] Kernel panic - not syncing: panic_on_warn set ... [ 45.813421] CPU: 0 PID: 7659 Comm: syz-executor301 Not tainted 5.0.0-rc8+ #2 [ 45.820585] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.829918] Call Trace: [ 45.832492] dump_stack+0x172/0x1f0 [ 45.836130] ? generic_make_request_checks+0x1bb0/0x2140 [ 45.841571] panic+0x2cb/0x65c [ 45.844749] ? __warn_printk+0xf3/0xf3 [ 45.848633] ? generic_make_request_checks+0x1c8a/0x2140 [ 45.854097] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.859619] ? __warn.cold+0x5/0x45 [ 45.863237] ? __warn+0xe8/0x1d0 [ 45.866593] ? generic_make_request_checks+0x1c8a/0x2140 [ 45.872022] __warn.cold+0x20/0x45 [ 45.875543] ? vprintk_emit+0x1ce/0x6d0 [ 45.879499] ? generic_make_request_checks+0x1c8a/0x2140 [ 45.884945] report_bug+0x263/0x2b0 [ 45.888571] do_error_trap+0x11b/0x200 [ 45.892440] do_invalid_op+0x37/0x50 [ 45.896151] ? generic_make_request_checks+0x1c8a/0x2140 [ 45.901585] invalid_op+0x14/0x20 [ 45.905021] RIP: 0010:generic_make_request_checks+0x1c8a/0x2140 [ 45.911059] Code: 00 00 44 8b ab dc 04 00 00 48 8d b5 78 ff ff ff 4c 89 ff e8 98 7c 05 00 48 c7 c7 80 a3 a0 87 48 89 c6 44 89 ea e8 c4 be 2b fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 80 3c 02 [ 45.929954] RSP: 0018:ffff8880976fef80 EFLAGS: 00010286 [ 45.935299] RAX: 0000000000000000 RBX: ffff8880a3ffa0c0 RCX: 0000000000000000 [ 45.942550] RDX: 0000000000000000 RSI: ffffffff815a9066 RDI: ffffed1012edfde2 [ 45.949798] RBP: ffff8880976ff080 R08: ffff88808f51e600 R09: ffffed1015d05021 [ 45.957050] R10: ffffed1015d05020 R11: ffff8880ae828107 R12: ffff888095fd80c8 [ 45.964298] R13: 0000000000000000 R14: 0000000000000001 R15: ffff888095fd80c0 [ 45.971556] ? vprintk_func+0x86/0x189 [ 45.975460] ? trace_event_raw_event_block_rq_requeue+0x640/0x640 [ 45.981693] ? mark_held_locks+0x100/0x100 [ 45.985935] generic_make_request+0x24c/0x12d0 [ 45.990512] ? find_held_lock+0x35/0x130 [ 45.994570] ? bio_associate_blkg_from_css+0x513/0x9d0 [ 45.999840] ? blk_queue_enter+0xe90/0xe90 [ 46.004057] ? lock_downgrade+0x810/0x810 [ 46.008192] submit_bio+0xba/0x480 [ 46.011712] ? submit_bio+0xba/0x480 [ 46.015443] ? generic_make_request+0x12d0/0x12d0 [ 46.020270] ? bio_reset+0x3b0/0x3b0 [ 46.023971] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 46.028976] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 46.033978] ? wbc_account_io+0x17e/0x2a0 [ 46.038112] submit_bh_wbc+0x5f7/0x7f0 [ 46.041984] __block_write_full_page+0x771/0x1020 [ 46.046825] ? check_disk_change+0x140/0x140 [ 46.051229] block_write_full_page+0x21f/0x270 [ 46.055830] ? check_disk_change+0x140/0x140 [ 46.060220] blkdev_writepage+0x25/0x30 [ 46.064178] __writepage+0x67/0xe0 [ 46.067730] write_cache_pages+0x8af/0x1560 [ 46.072070] ? __lock_acquire+0x53b/0x4700 [ 46.076289] ? __wb_update_bandwidth+0x670/0x670 [ 46.081030] ? clear_page_dirty_for_io+0xff0/0xff0 [ 46.085941] ? __lock_acquire+0x53b/0x4700 [ 46.090174] ? __lock_acquire+0x53b/0x4700 [ 46.094396] generic_writepages+0xed/0x160 [ 46.098620] ? write_cache_pages+0x1560/0x1560 [ 46.103201] ? 0xffffffff81000000 [ 46.106654] ? wbc_attach_and_unlock_inode+0x51a/0x930 [ 46.111929] ? find_held_lock+0x35/0x130 [ 46.115988] ? blkdev_readpages+0x40/0x40 [ 46.120178] blkdev_writepages+0x1e/0x30 [ 46.124238] do_writepages+0xfc/0x2a0 [ 46.128024] ? page_writeback_cpu_online+0x20/0x20 [ 46.132936] ? do_raw_spin_lock+0x12a/0x2e0 [ 46.137248] ? kasan_check_read+0x11/0x20 [ 46.141377] ? do_raw_spin_unlock+0x57/0x270 [ 46.145768] ? _raw_spin_unlock+0x2d/0x50 [ 46.149894] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.155429] ? wbc_attach_and_unlock_inode+0x5c4/0x930 [ 46.160692] __filemap_fdatawrite_range+0x26d/0x340 [ 46.165689] ? delete_from_page_cache_batch+0x10e0/0x10e0 [ 46.171212] ? __lock_acquire+0x53b/0x4700 [ 46.175433] filemap_write_and_wait+0x47/0xd0 [ 46.179912] __blkdev_put+0x204/0x810 [ 46.183696] ? bd_set_size+0xb0/0xb0 [ 46.187391] ? wait_for_completion+0x440/0x440 [ 46.191975] blkdev_put+0x98/0x560 [ 46.195498] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 46.201017] ? blkdev_put+0x560/0x560 [ 46.204810] blkdev_close+0x8b/0xb0 [ 46.208449] __fput+0x2df/0x8d0 [ 46.211731] ____fput+0x16/0x20 [ 46.214994] task_work_run+0x14a/0x1c0 [ 46.218865] do_exit+0x92c/0x2fd0 [ 46.222298] ? get_signal+0x331/0x1d50 [ 46.226190] ? mm_update_next_owner+0x660/0x660 [ 46.230868] ? kasan_check_read+0x11/0x20 [ 46.234997] ? _raw_spin_unlock_irq+0x28/0x90 [ 46.239476] ? get_signal+0x331/0x1d50 [ 46.243341] ? _raw_spin_unlock_irq+0x28/0x90 [ 46.247821] do_group_exit+0x135/0x370 [ 46.251706] get_signal+0x399/0x1d50 [ 46.255406] ? debug_object_deactivate+0x360/0x360 [ 46.260334] ? __call_rcu.constprop.0+0x2a3/0x6c0 [ 46.265194] do_signal+0x87/0x1940 [ 46.268728] ? task_work_run+0x118/0x1c0 [ 46.272783] ? kasan_check_read+0x11/0x20 [ 46.276927] ? setup_sigcontext+0x7d0/0x7d0 [ 46.281239] ? _raw_spin_unlock_irq+0x28/0x90 [ 46.285718] ? kasan_check_read+0x11/0x20 [ 46.289853] ? exit_to_usermode_loop+0x43/0x2c0 [ 46.294503] ? do_syscall_64+0x52d/0x610 [ 46.298554] ? exit_to_usermode_loop+0x43/0x2c0 [ 46.303220] ? lockdep_hardirqs_on+0x415/0x5d0 [ 46.307804] ? trace_hardirqs_on+0x67/0x230 [ 46.312130] exit_to_usermode_loop+0x244/0x2c0 [ 46.316726] do_syscall_64+0x52d/0x610 [ 46.320612] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.325793] RIP: 0033:0x449739 [ 46.328986] Code: Bad RIP value. [ 46.332341] RSP: 002b:00007f7735f15cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 46.340033] RAX: fffffffffffffe00 RBX: 00000000006dac68 RCX: 0000000000449739 [ 46.347296] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dac68 [ 46.354581] RBP: 00000000006dac60 R08: 0000000000000000 R09: 0000000000000000 [ 46.361859] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dac6c [ 46.369112] R13: 00007ffdbe0c81ef R14: 00007f7735f169c0 R15: 20c49ba5e353f7cf [ 46.377406] Kernel Offset: disabled [ 46.381064] Rebooting in 86400 seconds..