loop3: detected capacity change from 0 to 8192
==================================================================
BUG: KCSAN: data-race in __fsnotify_parent / __fsnotify_recalc_mask

write to 0xffff88810105dcf0 of 4 bytes by task 3250 on cpu 0:
 __fsnotify_recalc_mask+0x216/0x320 fs/notify/mark.c:248
 fsnotify_recalc_mask+0xaa/0x190 fs/notify/mark.c:286
 fsnotify_add_mark_locked+0x6e0/0x840 fs/notify/mark.c:807
 fsnotify_add_inode_mark_locked include/linux/fsnotify_backend.h:814 [inline]
 inotify_new_watch fs/notify/inotify/inotify_user.c:620 [inline]
 inotify_update_watch fs/notify/inotify/inotify_user.c:647 [inline]
 __do_sys_inotify_add_watch fs/notify/inotify/inotify_user.c:786 [inline]
 __se_sys_inotify_add_watch+0x66c/0x800 fs/notify/inotify/inotify_user.c:729
 __x64_sys_inotify_add_watch+0x43/0x50 fs/notify/inotify/inotify_user.c:729
 x64_sys_call+0x2824/0x2e00 arch/x86/include/generated/asm/syscalls_64.h:255
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff88810105dcf0 of 4 bytes by task 3640 on cpu 1:
 fsnotify_object_watched fs/notify/fsnotify.c:198 [inline]
 __fsnotify_parent+0xd4/0x380 fs/notify/fsnotify.c:228
 fsnotify_parent include/linux/fsnotify.h:96 [inline]
 fsnotify_file include/linux/fsnotify.h:131 [inline]
 fsnotify_close include/linux/fsnotify.h:412 [inline]
 __fput+0x5ca/0x6f0 fs/file_table.c:408
 __fput_sync+0x44/0x60 fs/file_table.c:507
 __do_sys_close fs/open.c:1566 [inline]
 __se_sys_close+0x101/0x1b0 fs/open.c:1551
 __x64_sys_close+0x1f/0x30 fs/open.c:1551
 x64_sys_call+0x2630/0x2e00 arch/x86/include/generated/asm/syscalls_64.h:4
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000000 -> 0x00002008

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 3640 Comm: syz.3.63 Not tainted 6.10.0-syzkaller-12888-g5437f30d3458 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
==================================================================
loop3: detected capacity change from 0 to 2048
EXT4-fs (loop3): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
EXT4-fs error (device loop3): ext4_mb_generate_buddy:1220: group 0, block bitmap and bg descriptor inconsistent: 25 vs 150994969 free clusters
EXT4-fs (loop3): Delayed block allocation failed for inode 18 at logical offset 0 with max blocks 32 with error 28
EXT4-fs (loop3): This should not happen!! Data will be lost

EXT4-fs (loop3): Total free blocks count 0
EXT4-fs (loop3): Free/Dirty block details
EXT4-fs (loop3): free_blocks=2415919104
EXT4-fs (loop3): dirty_blocks=32
EXT4-fs (loop3): Block reservation details
EXT4-fs (loop3): i_reserved_data_blocks=2