syzbot

loop1: detected capacity change from 0 to 512
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BUG: KCSAN: data-race in __filemap_add_folio / invalidate_bdev

read-write to 0xffff8881005f0bb8 of 8 bytes by task 3293 on cpu 0:
 __filemap_add_folio+0x5b9/0x7d0 mm/filemap.c:928
 filemap_add_folio+0x98/0x1b0 mm/filemap.c:969
 page_cache_ra_unbounded+0x1f3/0x380 mm/readahead.c:275
 do_page_cache_ra mm/readahead.c:327 [inline]
 force_page_cache_ra mm/readahead.c:356 [inline]
 page_cache_sync_ra+0x256/0x6c0 mm/readahead.c:572
 filemap_get_pages+0x2d0/0x1150 mm/filemap.c:2603
 filemap_read+0x231/0xa00 mm/filemap.c:2712
 blkdev_read_iter+0x22d/0x2e0 block/fops.c:852
 new_sync_read fs/read_write.c:491 [inline]
 vfs_read+0x64c/0x770 fs/read_write.c:572
 ksys_read+0xda/0x1a0 fs/read_write.c:715
 __do_sys_read fs/read_write.c:724 [inline]
 __se_sys_read fs/read_write.c:722 [inline]
 __x64_sys_read+0x40/0x50 fs/read_write.c:722
 x64_sys_call+0x27bc/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff8881005f0bb8 of 8 bytes by task 4203 on cpu 1:
 invalidate_bdev+0x25/0x70 block/bdev.c:99
 bdev_disk_changed+0xeb/0xcb0 block/partitions/core.c:657
 blkdev_get_whole+0x1f5/0x2d0 block/bdev.c:748
 bdev_open+0x280/0x7e0 block/bdev.c:957
 bdev_file_open_by_dev+0x1e6/0x250 block/bdev.c:1059
 setup_bdev_super+0x46/0x370 fs/super.c:1610
 get_tree_bdev_flags+0x21c/0x300 fs/super.c:1690
 get_tree_bdev+0x1f/0x30 fs/super.c:1715
 ext4_get_tree+0x1c/0x30 fs/ext4/super.c:5760
 vfs_get_tree+0x57/0x1d0 fs/super.c:1815
 do_new_mount+0x207/0x5e0 fs/namespace.c:3808
 path_mount+0x4a4/0xb20 fs/namespace.c:4123
 do_mount fs/namespace.c:4136 [inline]
 __do_sys_mount fs/namespace.c:4347 [inline]
 __se_sys_mount+0x28f/0x2e0 fs/namespace.c:4324
 __x64_sys_mount+0x67/0x80 fs/namespace.c:4324
 x64_sys_call+0x2b4d/0x2ff0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd2/0x200 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000000000000000 -> 0x0000000000000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 4203 Comm: syz.1.216 Not tainted syzkaller #0 PREEMPT(voluntary) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
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EXT4-fs error (device loop1): ext4_orphan_get:1418: comm syz.1.216: bad orphan inode 11862016
EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000d40000 r/w without journal. Quota mode: writeback.
ext4 filesystem being mounted at /44/file1 supports timestamps until 2038-01-19 (0x7fffffff)