INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 38.426687] loop: Write error at byte offset 0, length 4096. [ 38.432626] print_req_error: I/O error, dev loop0, sector 0 [ 38.438601] Buffer I/O error on dev loop0, logical block 0, lost async page write [ 38.446461] loop: Write error at byte offset 4096, length 4096. [ 38.452549] print_req_error: I/O error, dev loop0, sector 8 [ 38.458263] Buffer I/O error on dev loop0, logical block 1, lost async page write [ 38.466448] loop: Write error at byte offset 8192, length 4096. executing program executing program executing program executing program executing program executing program executing program [ 38.472540] print_req_error: I/O error, dev loop0, sector 16 [ 38.478345] Buffer I/O error on dev loop0, logical block 2, lost async page write [ 38.486177] loop: Write error at byte offset 12288, length 4096. [ 38.492337] print_req_error: I/O error, dev loop0, sector 24 [ 38.498154] Buffer I/O error on dev loop0, logical block 3, lost async page write [ 38.505825] loop: Write error at byte offset 16384, length 4096. [ 38.511971] print_req_error: I/O error, dev loop0, sector 32 [ 38.517776] Buffer I/O error on dev loop0, logical block 4, lost async page write executing program executing program executing program executing program executing program executing program executing program executing program [ 38.525448] loop: Write error at byte offset 20480, length 4096. [ 38.531621] print_req_error: I/O error, dev loop0, sector 40 [ 38.537421] Buffer I/O error on dev loop0, logical block 5, lost async page write [ 38.545383] loop: Write error at byte offset 24576, length 4096. [ 38.551554] print_req_error: I/O error, dev loop0, sector 48 [ 38.557371] Buffer I/O error on dev loop0, logical block 6, lost async page write [ 38.565047] loop: Write error at byte offset 28672, length 4096. [ 38.571194] print_req_error: I/O error, dev loop0, sector 56 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.576995] Buffer I/O error on dev loop0, logical block 7, lost async page write [ 38.584737] loop: Write error at byte offset 32768, length 4096. [ 38.590996] print_req_error: I/O error, dev loop0, sector 64 [ 38.596830] Buffer I/O error on dev loop0, logical block 8, lost async page write [ 38.604535] loop: Write error at byte offset 36864, length 4096. [ 38.610831] print_req_error: I/O error, dev loop0, sector 72 [ 38.616662] Buffer I/O error on dev loop0, logical block 9, lost async page write executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.668227] WARNING: CPU: 0 PID: 4479 at fs/buffer.c:1079 mark_buffer_dirty+0x555/0x6b0 [ 38.676378] Kernel panic - not syncing: panic_on_warn set ... [ 38.676378] [ 38.683724] CPU: 0 PID: 4479 Comm: syzkaller958588 Not tainted 4.16.0+ #3 [ 38.690627] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.699954] Call Trace: [ 38.702524] dump_stack+0x1b9/0x294 [ 38.706133] ? dump_stack_print_info.cold.2+0x52/0x52 [ 38.711311] ? mark_buffer_dirty+0x4f0/0x6b0 executing program executing program executing program executing program executing program [ 38.715703] panic+0x22f/0x4de [ 38.718890] ? add_taint.cold.5+0x16/0x16 [ 38.723021] ? __warn.cold.8+0x148/0x1b3 [ 38.727061] ? __warn.cold.8+0x117/0x1b3 [ 38.731101] ? mark_buffer_dirty+0x555/0x6b0 [ 38.735489] __warn.cold.8+0x163/0x1b3 [ 38.739360] ? mark_buffer_dirty+0x555/0x6b0 [ 38.743749] report_bug+0x252/0x2d0 [ 38.747356] do_error_trap+0x1de/0x490 [ 38.751224] ? math_error+0x420/0x420 [ 38.755009] ? check_same_owner+0x320/0x320 [ 38.759311] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.764133] do_invalid_op+0x1b/0x20 executing program executing program executing program executing program [ 38.767832] invalid_op+0x1b/0x40 [ 38.771267] RIP: 0010:mark_buffer_dirty+0x555/0x6b0 [ 38.776259] RSP: 0018:ffff8801aa8a7058 EFLAGS: 00010293 [ 38.781601] RAX: ffff8801af19a4c0 RBX: ffff8801aa594150 RCX: ffffffff81cb40bf [ 38.788853] RDX: 0000000000000000 RSI: ffffffff81cb4565 RDI: 0000000000000007 [ 38.796101] RBP: ffff8801aa8a7168 R08: ffff8801af19a4c0 R09: ffffea0006bc1b00 [ 38.803351] R10: ffffed0035e0d9ff R11: ffff8801af06cfff R12: 1ffff10035514e0c [ 38.810606] R13: 0000000000000000 R14: ffff8801aa8a7140 R15: dffffc0000000000 executing program executing program executing program executing program executing program [ 38.817871] ? mark_buffer_dirty+0xaf/0x6b0 [ 38.822177] ? mark_buffer_dirty+0x555/0x6b0 [ 38.826567] ? mark_buffer_dirty+0x555/0x6b0 [ 38.830954] ? __set_page_dirty_buffers+0x410/0x410 [ 38.835949] ? check_disk_change+0x140/0x140 [ 38.840337] ? __breadahead+0x150/0x150 [ 38.844292] ? balance_dirty_pages_ratelimited+0x1d3/0x1f50 [ 38.849987] __block_commit_write.isra.35+0x19a/0x390 [ 38.855160] ? mark_buffer_dirty_inode+0x5a0/0x5a0 [ 38.860070] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 executing program executing program executing program executing program [ 38.865583] ? wait_for_stable_page+0x186/0x350 [ 38.870233] block_write_end+0xa5/0x260 [ 38.874188] ? page_zero_new_buffers+0x660/0x660 [ 38.878921] ? memcpy_from_page+0x8e/0xf0 [ 38.883053] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.888570] blkdev_write_end+0xc5/0x2d0 [ 38.892611] ? blkdev_bio_end_io+0x800/0x800 [ 38.897004] ? csum_and_copy_from_iter_full+0x1090/0x1090 [ 38.902696] ? iov_iter_npages+0xe60/0xe60 [ 38.906908] ? check_same_owner+0x320/0x320 [ 38.911217] ? blkdev_write_begin+0x3c/0x50 executing program executing program executing program executing program executing program [ 38.915516] ? blkdev_bio_end_io+0x800/0x800 [ 38.919903] generic_perform_write+0x4c9/0x6a0 [ 38.924468] ? add_page_wait_queue+0x2a0/0x2a0 [ 38.929033] ? current_time+0xc0/0xc0 [ 38.932812] ? blk_lld_busy+0x70/0x70 [ 38.936597] __generic_file_write_iter+0x3be/0x5e0 [ 38.941501] ? __kmalloc+0x14e/0x760 [ 38.945190] ? iter_file_splice_write+0x255/0xff0 [ 38.950010] blkdev_write_iter+0x233/0x420 [ 38.954225] ? blkdev_close+0xb0/0xb0 [ 38.958010] do_iter_readv_writev+0x6a0/0x970 [ 38.962485] ? vfs_dedupe_file_range+0xa00/0xa00 executing program executing program executing program executing program [ 38.967225] ? rw_verify_area+0x118/0x360 [ 38.971358] do_iter_write+0x185/0x5f0 [ 38.975227] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.980227] ? __kmalloc+0x5f9/0x760 [ 38.983926] vfs_iter_write+0x77/0xb0 [ 38.987708] iter_file_splice_write+0x8cb/0xff0 [ 38.992360] ? do_vmsplice+0x1b0/0x1b0 [ 38.996233] ? rw_verify_area+0x118/0x360 [ 39.000370] ? do_vmsplice+0x1b0/0x1b0 [ 39.004240] direct_splice_actor+0x128/0x190 [ 39.008629] splice_direct_to_actor+0x310/0x8d0 [ 39.013275] ? pipe_to_sendpage+0x3f0/0x3f0 executing program executing program executing program executing program executing program executing program [ 39.017578] ? do_splice_to+0x190/0x190 [ 39.021531] ? rw_verify_area+0x118/0x360 [ 39.025659] do_splice_direct+0x2cc/0x400 [ 39.029787] ? splice_direct_to_actor+0x8d0/0x8d0 [ 39.034608] ? rw_verify_area+0x118/0x360 [ 39.038735] do_sendfile+0x60f/0xe00 [ 39.042432] ? do_compat_pwritev64+0x1b0/0x1b0 [ 39.046998] ? __might_sleep+0x95/0x190 [ 39.050955] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 39.056470] ? _copy_from_user+0xdf/0x150 [ 39.060596] SyS_sendfile64+0xdf/0x190 [ 39.064461] ? SyS_sendfile+0x1d0/0x1d0 executing program executing program executing program [ 39.068410] ? fput+0x130/0x1a0 [ 39.071669] ? do_syscall_64+0xb7/0x9d0 [ 39.075625] ? SyS_sendfile+0x1d0/0x1d0 [ 39.079579] do_syscall_64+0x29e/0x9d0 [ 39.083446] ? vmalloc_sync_all+0x30/0x30 [ 39.087569] ? _raw_spin_unlock_irq+0x27/0x70 [ 39.092044] ? finish_task_switch+0x1ca/0x810 [ 39.096605] ? syscall_return_slowpath+0x5c0/0x5c0 [ 39.101516] ? syscall_return_slowpath+0x30f/0x5c0 [ 39.106428] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 39.111775] ? trace_hardirqs_off_thunk+0x1a/0x1c executing program executing program executing program executing program executing program [ 39.116606] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 39.121774] RIP: 0033:0x449a59 [ 39.124946] RSP: 002b:00007efdef906ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 39.132641] RAX: ffffffffffffffda RBX: 00000000006dbc24 RCX: 0000000000449a59 [ 39.139887] RDX: 0000000020000000 RSI: 0000000000000014 RDI: 0000000000000013 [ 39.147132] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 39.154376] R10: 0000080000000007 R11: 0000000000000246 R12: 0000000000000000 [ 39.161624] R13: 00007fff9b9fb0df R14: 00007efdef9079c0 R15: 0000000000000001 [ 39.169349] Dumping ftrace buffer: [ 39.172924] (ftrace buffer empty) [ 39.176612] Kernel Offset: disabled [ 39.180222] Rebooting in 86400 seconds..