------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 0 PID: 7759 at block/blk-core.c:801 bio_check_ro block/blk-core.c:801 [inline]
WARNING: CPU: 0 PID: 7759 at block/blk-core.c:801 generic_make_request_checks+0x1c2f/0x2090 block/blk-core.c:906
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 7759 Comm: syz-executor401 Not tainted 5.1.0-rc5-next-20190418 #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2cb/0x72b kernel/panic.c:214
 __warn.cold+0x20/0x46 kernel/panic.c:576
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:972
RIP: 0010:bio_check_ro block/blk-core.c:801 [inline]
RIP: 0010:generic_make_request_checks+0x1c2f/0x2090 block/blk-core.c:906
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
RSP: 0018:ffff88808d0bf1e0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880a35bd540 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815b2ba6 RDI: ffffed1011a17e2e
RBP: ffff88808d0bf2e0 R08: ffff88808e1a85c0 R09: ffffed1015d05211
R10: ffffed1015d05210 R11: ffff8880ae829087 R12: ffff88808e18f188
R13: 0000000000000000 R14: 0000000000000001 R15: ffff88808e18f180
 generic_make_request+0x24c/0x12d0 block/blk-core.c:1032
 submit_bio+0xba/0x480 block/blk-core.c:1197
 submit_bh_wbc+0x5f7/0x7f0 fs/buffer.c:3135
 __block_write_full_page+0x771/0x1020 fs/buffer.c:1803
 block_write_full_page+0x21f/0x270 fs/buffer.c:2993
 blkdev_writepage+0x25/0x30 fs/block_dev.c:621
 __writepage+0x67/0xe0 mm/page-writeback.c:2300
 write_cache_pages+0x8af/0x1560 mm/page-writeback.c:2235
 generic_writepages mm/page-writeback.c:2326 [inline]
 generic_writepages+0xed/0x160 mm/page-writeback.c:2315
 blkdev_writepages+0x1e/0x30 fs/block_dev.c:2005
 do_writepages+0xfc/0x2a0 mm/page-writeback.c:2341
 __filemap_fdatawrite_range+0x26d/0x340 mm/filemap.c:418
 __filemap_fdatawrite mm/filemap.c:426 [inline]
 filemap_fdatawrite mm/filemap.c:431 [inline]
 filemap_write_and_wait mm/filemap.c:612 [inline]
 filemap_write_and_wait+0x47/0xd0 mm/filemap.c:607
 __sync_blockdev fs/block_dev.c:503 [inline]
 sync_blockdev fs/block_dev.c:512 [inline]
 __blkdev_put+0x204/0x810 fs/block_dev.c:1837
 blkdev_put+0x98/0x560 fs/block_dev.c:1906
 blkdev_close+0x8b/0xb0 fs/block_dev.c:1913
 __fput+0x2e5/0x8d0 fs/file_table.c:278
 ____fput+0x16/0x20 fs/file_table.c:309
 task_work_run+0x14a/0x1c0 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0x90a/0x2fa0 kernel/exit.c:876
 do_group_exit+0x135/0x370 kernel/exit.c:980
 __do_sys_exit_group kernel/exit.c:991 [inline]
 __se_sys_exit_group kernel/exit.c:989 [inline]
 __x64_sys_exit_group+0x44/0x50 kernel/exit.c:989
 do_syscall_64+0x103/0x670 arch/x86/entry/common.c:298
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x43edf8
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
RSP: 002b:00007ffe565c3698 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043edf8
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00000000004be608 R08: 00000000000000e7 R09: ffffffffffffffd0
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001
R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..