UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: error (device loop2): udf_read_tagged: read failed, block=256, location=256
==================================================================
BUG: KCSAN: data-race in wbt_wait / wbt_wait

write to 0xffff888141e3db40 of 8 bytes by task 29913 on cpu 0:
 wb_timestamp block/blk-wbt.c:89 [inline]
 wbt_wait+0x12b/0x2b0 block/blk-wbt.c:579
 __rq_qos_throttle+0x39/0x70 block/blk-rq-qos.c:72
 rq_qos_throttle block/blk-rq-qos.h:182 [inline]
 blk_mq_submit_bio+0x253/0x1060 block/blk-mq.c:2185
 __submit_bio_noacct_mq block/blk-core.c:1014 [inline]
 submit_bio_noacct+0x7c2/0x9a0 block/blk-core.c:1047
 submit_bio+0x200/0x370 block/blk-core.c:1118
 mpage_bio_submit fs/mpage.c:66 [inline]
 mpage_readahead+0x2ef/0x330 fs/mpage.c:393
 blkdev_readahead+0x18/0x20 fs/block_dev.c:645
 read_pages+0x9c/0x6e0 mm/readahead.c:130
 page_cache_ra_unbounded+0x46c/0x4c0 mm/readahead.c:238
 do_page_cache_ra mm/readahead.c:267 [inline]
 force_page_cache_ra+0x226/0x260 mm/readahead.c:298
 page_cache_sync_ra+0x178/0x1a0 mm/readahead.c:572
 page_cache_sync_readahead include/linux/pagemap.h:840 [inline]
 filemap_get_pages+0x1ba/0x660 mm/filemap.c:2375
 filemap_read+0x1ba/0x7b0 mm/filemap.c:2458
 generic_file_read_iter+0x82/0x410 mm/filemap.c:2609
 blkdev_read_iter+0xb3/0xc0 fs/block_dev.c:1723
 call_read_iter include/linux/fs.h:1971 [inline]
 new_sync_read fs/read_write.c:415 [inline]
 vfs_read+0x565/0x5d0 fs/read_write.c:496
 ksys_read+0xce/0x180 fs/read_write.c:634
 __do_sys_read fs/read_write.c:644 [inline]
 __se_sys_read fs/read_write.c:642 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:642
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff888141e3db40 of 8 bytes by task 7767 on cpu 1:
 wb_timestamp block/blk-wbt.c:88 [inline]
 wbt_wait+0xcf/0x2b0 block/blk-wbt.c:579
 __rq_qos_throttle+0x39/0x70 block/blk-rq-qos.c:72
 rq_qos_throttle block/blk-rq-qos.h:182 [inline]
 blk_mq_submit_bio+0x253/0x1060 block/blk-mq.c:2185
 __submit_bio_noacct_mq block/blk-core.c:1014 [inline]
 submit_bio_noacct+0x7c2/0x9a0 block/blk-core.c:1047
 submit_bio+0x200/0x370 block/blk-core.c:1118
 submit_bh_wbc+0x36b/0x3b0 fs/buffer.c:3055
 submit_bh fs/buffer.c:3061 [inline]
 __bread_slow fs/buffer.c:1209 [inline]
 __bread_gfp+0x110/0x220 fs/buffer.c:1402
 udf_tread fs/udf/misc.c:41 [inline]
 udf_read_tagged+0xad/0x380 fs/udf/misc.c:210
 udf_check_anchor_block+0xed/0x280 fs/udf/super.c:1833
 udf_scan_anchors+0x25a/0x390 fs/udf/super.c:1895
 udf_find_anchor fs/udf/super.c:1930 [inline]
 udf_load_vrs+0x105/0x610 fs/udf/super.c:1995
 udf_fill_super+0x4b6/0xd00 fs/udf/super.c:2188
 mount_bdev+0x1e8/0x290 fs/super.c:1367
 udf_mount+0x2d/0x40 fs/udf/super.c:127
 legacy_get_tree+0x70/0xc0 fs/fs_context.c:592
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1497
 do_new_mount fs/namespace.c:2903 [inline]
 path_mount+0x11b9/0x1c00 fs/namespace.c:3233
 do_mount fs/namespace.c:3246 [inline]
 __do_sys_mount fs/namespace.c:3454 [inline]
 __se_sys_mount+0x23d/0x2e0 fs/namespace.c:3431
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3431
 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 7767 Comm: syz-executor.2 Not tainted 5.12.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
UDF-fs: error (device loop2): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop2): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: error (device loop2): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop2): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop2): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: warning (device loop2): udf_fill_super: No partition found (1)