==================================================================
BUG: KCSAN: data-race in __dentry_kill / lookup_fast

read-write to 0xffff888105202300 of 4 bytes by task 24004 on cpu 0:
 dentry_unlist fs/dcache.c:588 [inline]
 __dentry_kill+0x22e/0x4c0 fs/dcache.c:657
 dput+0x5c/0xd0 fs/dcache.c:885
 __fput+0x428/0x640 fs/file_table.c:472
 __fput_sync+0x96/0xc0 fs/file_table.c:550
 __do_sys_close fs/open.c:1580 [inline]
 __se_sys_close fs/open.c:1565 [inline]
 __x64_sys_close+0x55/0xe0 fs/open.c:1565
 x64_sys_call+0x266c/0x2dc0 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

read to 0xffff888105202300 of 4 bytes by task 24032 on cpu 1:
 d_revalidate fs/namei.c:927 [inline]
 lookup_fast+0xe9/0x320 fs/namei.c:1741
 lookup_fast_for_open fs/namei.c:3688 [inline]
 open_last_lookups fs/namei.c:3721 [inline]
 path_openat+0x41e/0x1fc0 fs/namei.c:3986
 do_filp_open+0x107/0x230 fs/namei.c:4016
 do_sys_openat2+0xab/0x120 fs/open.c:1428
 do_sys_open fs/open.c:1443 [inline]
 __do_sys_openat fs/open.c:1459 [inline]
 __se_sys_openat fs/open.c:1454 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1454
 x64_sys_call+0x2b30/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:258
 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: 0x00400008 -> 0x00008008

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 24032 Comm: syz-executor Not tainted 6.14.0-rc4-syzkaller-00278-gece144f151ac #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
==================================================================
==================================================================
BUG: KCSAN: data-race in dentry_unlink_inode / step_into

write to 0xffff8881051241b0 of 8 bytes by task 24004 on cpu 1:
 __d_clear_type_and_inode fs/dcache.c:393 [inline]
 dentry_unlink_inode+0x65/0x260 fs/dcache.c:430
 __dentry_kill+0x18b/0x4c0 fs/dcache.c:643
 dput+0x5c/0xd0 fs/dcache.c:885
 __fput+0x428/0x640 fs/file_table.c:472
 __fput_sync+0x96/0xc0 fs/file_table.c:550
 __do_sys_close fs/open.c:1580 [inline]
 __se_sys_close fs/open.c:1565 [inline]
 __x64_sys_close+0x55/0xe0 fs/open.c:1565
 x64_sys_call+0x266c/0x2dc0 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

read to 0xffff8881051241b0 of 8 bytes by task 24032 on cpu 0:
 step_into+0x11d/0x820 fs/namei.c:1956
 open_last_lookups fs/namei.c:3777 [inline]
 path_openat+0x13e5/0x1fc0 fs/namei.c:3986
 do_filp_open+0x107/0x230 fs/namei.c:4016
 do_sys_openat2+0xab/0x120 fs/open.c:1428
 do_sys_open fs/open.c:1443 [inline]
 __do_sys_openat fs/open.c:1459 [inline]
 __se_sys_openat fs/open.c:1454 [inline]
 __x64_sys_openat+0xf3/0x120 fs/open.c:1454
 x64_sys_call+0x2b30/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:258
 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: 0xffff888100731340 -> 0x0000000000000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 24032 Comm: syz-executor Not tainted 6.14.0-rc4-syzkaller-00278-gece144f151ac #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
==================================================================