------------[ cut here ]------------
generic_make_request: Trying to write to read-only block-device nullb0 (partno 0)
WARNING: CPU: 1 PID: 10265 at block/blk-core.c:802 bio_check_ro block/blk-core.c:802 [inline]
WARNING: CPU: 1 PID: 10265 at block/blk-core.c:802 generic_make_request_checks+0x1c8a/0x2140 block/blk-core.c:907
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 10265 Comm: syz-executor874 Not tainted 5.0.0-rc7+ #85
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/0x65c kernel/panic.c:214
 __warn.cold+0x20/0x45 kernel/panic.c:571
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:bio_check_ro block/blk-core.c:802 [inline]
RIP: 0010:generic_make_request_checks+0x1c8a/0x2140 block/blk-core.c:907
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 a4 a0 87 48 89 c6 44 89 ea e8 04 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
RSP: 0018:ffff888097dbef80 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8880a31005c0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff815a92c6 RDI: ffffed1012fb7de2
RBP: ffff888097dbf080 R08: ffff88808d5a2680 R09: ffffed1015d25021
R10: ffffed1015d25020 R11: ffff8880ae928107 R12: ffff8880854f9a08
R13: 0000000000000000 R14: 0000000000000001 R15: ffff8880854f9a00
 generic_make_request+0x24c/0x12d0 block/blk-core.c:1033
 submit_bio+0xba/0x480 block/blk-core.c:1198
 submit_bh_wbc+0x5f7/0x7f0 fs/buffer.c:3088
 __block_write_full_page+0x771/0x1020 fs/buffer.c:1766
 block_write_full_page+0x21f/0x270 fs/buffer.c:2956
 blkdev_writepage+0x25/0x30 fs/block_dev.c:604
 __writepage+0x67/0xe0 mm/page-writeback.c:2296
 write_cache_pages+0x8af/0x1560 mm/page-writeback.c:2231
 generic_writepages mm/page-writeback.c:2320 [inline]
 generic_writepages+0xed/0x160 mm/page-writeback.c:2309
 ? 0xffffffff81000000
 blkdev_writepages+0x1e/0x30 fs/block_dev.c:1988
 do_writepages+0xfc/0x2a0 mm/page-writeback.c:2335
 __filemap_fdatawrite_range+0x26d/0x340 mm/filemap.c:411
 __filemap_fdatawrite mm/filemap.c:419 [inline]
 filemap_fdatawrite mm/filemap.c:424 [inline]
 filemap_write_and_wait mm/filemap.c:594 [inline]
 filemap_write_and_wait+0x47/0xd0 mm/filemap.c:589
 __sync_blockdev fs/block_dev.c:486 [inline]
 sync_blockdev fs/block_dev.c:495 [inline]
 __blkdev_put+0x204/0x810 fs/block_dev.c:1820
 blkdev_put+0x98/0x560 fs/block_dev.c:1889
 blkdev_close+0x8b/0xb0 fs/block_dev.c:1896
 __fput+0x2df/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+0x92c/0x2fd0 kernel/exit.c:875
 do_group_exit+0x135/0x370 kernel/exit.c:979
 get_signal+0x399/0x1d50 kernel/signal.c:2575
 do_signal+0x87/0x1940 arch/x86/kernel/signal.c:816
 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x449299
Code: e8 7c e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 1b 05 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f18eb30ccf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00000000006e5a08 RCX: 0000000000449299
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006e5a08
RBP: 00000000006e5a00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006e5a0c
R13: 00007ffcbffb289f R14: 00007f18eb30d9c0 R15: 20c49ba5e353f7cf
Kernel Offset: disabled
Rebooting in 86400 seconds..