==================================================================
BUG: KCSAN: data-race in __submit_bio / blk_mq_unfreeze_queue

write to 0xffff888101d45d8c of 4 bytes by task 23974 on cpu 1:
 __blk_mq_unfreeze_queue block/blk-mq.c:223 [inline]
 blk_mq_unfreeze_queue+0x3c/0xc0 block/blk-mq.c:234
 loop_set_status+0x487/0x5d0 drivers/block/loop.c:1300
 lo_ioctl+0x785/0x1270
 blkdev_ioctl+0x20e/0x440 block/ioctl.c:597
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:860
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888101d45d8c of 4 bytes by task 26676 on cpu 0:
 bio_queue_enter block/blk-core.c:467 [inline]
 __submit_bio+0x198/0x480 block/blk-core.c:867
 __submit_bio_noacct_mq block/blk-core.c:951 [inline]
 submit_bio_noacct+0x418/0x4e0 block/blk-core.c:977
 submit_bio+0x10c/0x180
 submit_bh_wbc+0x2db/0x320 fs/buffer.c:3054
 submit_bh fs/buffer.c:3060 [inline]
 block_read_full_page+0x7dc/0x8c0 fs/buffer.c:2339
 blkdev_readpage+0x18/0x20 block/fops.c:396
 filemap_read_page mm/filemap.c:2376 [inline]
 filemap_update_page mm/filemap.c:2455 [inline]
 filemap_get_pages mm/filemap.c:2564 [inline]
 filemap_read+0xf1f/0x1720 mm/filemap.c:2624
 generic_file_read_iter+0x75/0x2c0 mm/filemap.c:2775
 blkdev_read_iter+0x98/0x140 block/fops.c:583
 call_read_iter include/linux/fs.h:2155 [inline]
 new_sync_read fs/read_write.c:400 [inline]
 vfs_read+0x66c/0x750 fs/read_write.c:481
 ksys_read+0xd9/0x190 fs/read_write.c:619
 __do_sys_read fs/read_write.c:629 [inline]
 __se_sys_read fs/read_write.c:627 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:627
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000001 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 26676 Comm: udevd Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
udevd[26676]: inotify_add_watch(7, /dev/loop5p2, 10) failed: No such file or directory