================================================================== BUG: KCSAN: data-race in xas_create / xas_find write to 0xffff8881307e6901 of 1 bytes by task 16187 on cpu 1: xas_expand lib/xarray.c:611 [inline] xas_create+0x699/0xb30 lib/xarray.c:652 xas_store+0x70/0xca0 lib/xarray.c:784 __add_to_page_cache_locked+0x20b/0x4f0 mm/filemap.c:927 add_to_page_cache_lru+0xa0/0x1b0 mm/filemap.c:984 page_cache_ra_unbounded+0x274/0x430 mm/readahead.c:222 do_page_cache_ra mm/readahead.c:269 [inline] force_page_cache_ra+0x256/0x290 mm/readahead.c:301 page_cache_sync_ra+0xcc/0xe0 mm/readahead.c:575 page_cache_sync_readahead include/linux/pagemap.h:883 [inline] filemap_get_pages mm/filemap.c:2545 [inline] filemap_read+0x3ad/0x1220 mm/filemap.c:2628 generic_file_read_iter+0x75/0x2c0 mm/filemap.c:2779 blkdev_read_iter+0xb9/0xf0 block/fops.c:544 call_read_iter include/linux/fs.h:2157 [inline] new_sync_read fs/read_write.c:404 [inline] vfs_read+0x66c/0x750 fs/read_write.c:485 ksys_read+0xd9/0x190 fs/read_write.c:623 __do_sys_read fs/read_write.c:633 [inline] __se_sys_read fs/read_write.c:631 [inline] __x64_sys_read+0x3e/0x50 fs/read_write.c:631 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 0xffff8881307e6901 of 1 bytes by task 16214 on cpu 0: xas_find+0x2d9/0x3c0 lib/xarray.c:1257 find_get_entry mm/filemap.c:1978 [inline] find_get_entries+0xa0/0x300 mm/filemap.c:2042 truncate_inode_pages_range+0x863/0xad0 mm/truncate.c:375 truncate_inode_pages+0x20/0x30 mm/truncate.c:425 kill_bdev block/bdev.c:77 [inline] set_blocksize+0x24e/0x270 block/bdev.c:157 sb_set_blocksize+0x2c/0xa0 block/bdev.c:166 ext4_fill_super+0x2279/0x7840 fs/ext4/super.c:4321 mount_bdev+0x1e8/0x290 fs/super.c:1368 ext4_mount+0x2d/0x40 fs/ext4/super.c:6506 legacy_get_tree+0x70/0xc0 fs/fs_context.c:610 vfs_get_tree+0x4a/0x1a0 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x11ec/0x1d20 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+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x03 -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 16214 Comm: syz-executor.1 Tainted: G W 5.15.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== EXT4-fs (loop1): 1 orphan inode deleted ext4 filesystem being mounted at /root/syzkaller-testdir553045466/syzkaller.VQVm51/2171/file0 supports timestamps until 2038 (0x7fffffff)