------------[ cut here ]------------
Trying to write to read-only block-device sda1 (partno 1)
WARNING: CPU: 0 PID: 9 at block/blk-core.c:704 bio_check_ro block/blk-core.c:704 [inline]
WARNING: CPU: 0 PID: 9 at block/blk-core.c:704 submit_bio_checks+0x1627/0x1aa0 block/blk-core.c:817
Modules linked in:
CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted 5.12.0-rc6-next-20210409-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: writeback wb_workfn (flush-8:0)
RIP: 0010:bio_check_ro block/blk-core.c:704 [inline]
RIP: 0010:submit_bio_checks+0x1627/0x1aa0 block/blk-core.c:817
Code: 00 00 45 0f b6 a4 24 e0 05 00 00 48 8d 74 24 60 48 89 ef e8 eb 3e fe ff 48 c7 c7 e0 8c c0 89 48 89 c6 44 89 e2 e8 86 35 17 05 <0f> 0b e9 6b f3 ff ff e8 3d eb bc fd e8 78 40 58 05 31 ff 89 c3 89
RSP: 0018:ffffc90000ce70a8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88801b211bc0 RCX: 0000000000000000
RDX: ffff888011ba0000 RSI: ffffffff815c3165 RDI: fffff5200019ce07
RBP: ffff8880173b8000 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815bcfae R11: 0000000000000000 R12: 0000000000000001
R13: ffff8880173b8010 R14: ffff888142115c00 R15: ffff88801b2120c4
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005579533bb908 CR3: 000000000bc8e000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 submit_bio_noacct+0x81/0xf20 block/blk-core.c:1032
 submit_bio+0x263/0x5e0 block/blk-core.c:1118
 submit_bh_wbc+0x5eb/0x7f0 fs/buffer.c:3112
 __block_write_full_page+0x86c/0x1340 fs/buffer.c:1867
 block_write_full_page+0x14d/0x190 fs/buffer.c:3038
 __writepage+0x60/0x180 mm/page-writeback.c:2311
 write_cache_pages+0x759/0x11a0 mm/page-writeback.c:2246
 generic_writepages mm/page-writeback.c:2337 [inline]
 generic_writepages+0xe2/0x150 mm/page-writeback.c:2326
 do_writepages+0xec/0x290 mm/page-writeback.c:2352
 __writeback_single_inode+0x126/0xff0 fs/fs-writeback.c:1467
 writeback_sb_inodes+0x53d/0xf00 fs/fs-writeback.c:1732
 __writeback_inodes_wb+0xc6/0x280 fs/fs-writeback.c:1801
 wb_writeback+0x814/0xc50 fs/fs-writeback.c:1907
 wb_check_old_data_flush fs/fs-writeback.c:2009 [inline]
 wb_do_writeback fs/fs-writeback.c:2062 [inline]
 wb_workfn+0x8cf/0x12d0 fs/fs-writeback.c:2091
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294