loop4: detected capacity change from 0 to 4096
==================================================================
BUG: KCSAN: data-race in xas_create / xas_find

write to 0xffff8881372f5901 of 1 bytes by task 29234 on cpu 1:
 xas_expand lib/xarray.c:611 [inline]
 xas_create+0x699/0xb40 lib/xarray.c:652
 xas_store+0x70/0xca0 lib/xarray.c:784
 __filemap_add_folio+0x282/0x810 mm/filemap.c:900
 filemap_add_folio+0x6b/0x150 mm/filemap.c:959
 page_cache_ra_unbounded+0x274/0x400 mm/readahead.c:335
 do_page_cache_ra mm/readahead.c:382 [inline]
 force_page_cache_ra+0x1e6/0x220 mm/readahead.c:414
 page_cache_sync_ra+0xcc/0xe0 mm/readahead.c:780
 page_cache_sync_readahead include/linux/pagemap.h:1187 [inline]
 filemap_get_pages mm/filemap.c:2598 [inline]
 filemap_read+0x3d5/0xe10 mm/filemap.c:2685
 blkdev_read_iter+0x2cc/0x380 block/fops.c:611
 call_read_iter include/linux/fs.h:2073 [inline]
 new_sync_read fs/read_write.c:401 [inline]
 vfs_read+0x5e2/0x6c0 fs/read_write.c:482
 ksys_read+0xd9/0x190 fs/read_write.c:620
 __do_sys_read fs/read_write.c:630 [inline]
 __se_sys_read fs/read_write.c:628 [inline]
 __x64_sys_read+0x3e/0x50 fs/read_write.c:628
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881372f5901 of 1 bytes by task 29272 on cpu 0:
 xas_find+0x2d9/0x3c0 lib/xarray.c:1257
 find_get_entry mm/filemap.c:2036 [inline]
 find_get_entries+0x90/0x2e0 mm/filemap.c:2091
 truncate_inode_pages_range+0x76d/0xae0 mm/truncate.c:404
 truncate_inode_pages+0x20/0x30 mm/truncate.c:452
 kill_bdev block/bdev.c:77 [inline]
 set_blocksize+0x24e/0x270 block/bdev.c:153
 sb_set_blocksize block/bdev.c:162 [inline]
 sb_min_blocksize+0x92/0x110 block/bdev.c:178
 __ext4_fill_super+0xfe/0x5a00 fs/ext4/super.c:4413
 ext4_fill_super+0x10b/0x2f0 fs/ext4/super.c:5587
 get_tree_bdev+0x2c2/0x3d0 fs/super.c:1292
 vfs_get_tree+0x4a/0x1a0 fs/super.c:1497
 do_new_mount fs/namespace.c:3039 [inline]
 path_mount+0x11cf/0x1c40 fs/namespace.c:3369
 do_mount fs/namespace.c:3382 [inline]
 __do_sys_mount fs/namespace.c:3590 [inline]
 __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3567
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3567
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x50 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x0a -> 0x00

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 29272 Comm: syz-executor.4 Not tainted 5.17.0-syzkaller-11406-gf82da161ea75-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
EXT4-fs (loop4): mounted filesystem without journal. Quota mode: writeback.