loop1: detected capacity change from 0 to 131456 EXT4-fs (loop1): #blocks per group too big: 8238 ================================================================== BUG: KCSAN: data-race in __filemap_add_folio / filemap_write_and_wait_range write to 0xffff88810139a6f8 of 8 bytes by task 26601 on cpu 0: __filemap_add_folio+0x256/0x4d0 mm/filemap.c:946 filemap_add_folio+0x6b/0x150 mm/filemap.c:999 add_to_page_cache_lru+0x4e/0x70 mm/folio-compat.c:115 page_cache_ra_unbounded+0x274/0x430 mm/readahead.c:221 do_page_cache_ra mm/readahead.c:268 [inline] force_page_cache_ra+0x1e6/0x220 mm/readahead.c:300 page_cache_sync_ra+0xcc/0xe0 mm/readahead.c:574 page_cache_sync_readahead include/linux/pagemap.h:1028 [inline] filemap_get_pages mm/filemap.c:2556 [inline] filemap_read+0x3eb/0x16d0 mm/filemap.c:2642 generic_file_read_iter+0x72/0x2a0 mm/filemap.c:2792 blkdev_read_iter+0x96/0x140 block/fops.c:583 call_read_iter include/linux/fs.h:2156 [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+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88810139a6f8 of 8 bytes by task 30226 on cpu 1: mapping_needs_writeback mm/filemap.c:646 [inline] filemap_write_and_wait_range+0x36/0x340 mm/filemap.c:717 filemap_write_and_wait include/linux/fs.h:2865 [inline] sync_blockdev+0x3e/0x50 block/bdev.c:204 kill_block_super+0x52/0x90 fs/super.c:1398 deactivate_locked_super+0x6a/0xb0 fs/super.c:335 mount_bdev+0x204/0x290 fs/super.c:1372 legacy_get_tree+0x70/0xc0 fs/fs_context.c:610 vfs_get_tree+0x4a/0x1a0 fs/super.c:1500 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x11cf/0x1c40 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount+0x24b/0x2f0 fs/namespace.c:3516 __x64_sys_mount+0x63/0x70 fs/namespace.c:3516 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x000000000000002d -> 0x0000000000000030 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 30226 Comm: syz-executor.1 Tainted: G W 5.16.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================