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linux-yocto/fs/overlayfs
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NeilBrown e9c70084a6
ovl: fail ovl_lock_rename_workdir() if either target is unhashed 
As well as checking that the parent hasn't changed after getting the
lock we need to check that the dentry hasn't been unhashed.
Otherwise we might try to rename something that has been removed.

Reported-by: syzbot+bfc9a0ccf0de47d04e8c@syzkaller.appspotmail.com
Fixes: d2c995581c ("ovl: Call ovl_create_temp() without lock held.")
Signed-off-by: NeilBrown <neil@brown.name>
Link: https://patch.msgid.link/176429295510.634289.1552337113663461690@noble.neil.brown.name
Tested-by: syzbot+bfc9a0ccf0de47d04e8c@syzkaller.appspotmail.com
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2025-11-28 10:42:32 +01:00
..
copy_up.c Revert "fs: make vfs_fileattr_[get|set] return -EOPNOTSUPP" 2025-10-10 13:44:03 +02:00
dir.c ovl: make sure that ovl_create_real() returns a hashed dentry 2025-09-23 12:29:36 +02:00
export.c VFS: rename lookup_one_len family to lookup_noperm and remove permission check 2025-04-08 11:24:36 +02:00
file.c ovl: remove redundant IOCB_DIO_CALLER_COMP clearing 2025-10-10 14:02:47 +02:00
inode.c Revert "fs: make vfs_fileattr_[get|set] return -EOPNOTSUPP" 2025-10-10 13:44:03 +02:00
Kconfig fs: prepare for stackable filesystems backing file helpers 2023-12-23 16:35:08 +02:00
Makefile
namei.c ovl: Support mounting case-insensitive enabled layers 2025-09-23 12:29:36 +02:00
overlayfs.h file->f_path constification 2025-10-03 16:32:36 -07:00
ovl_entry.h ovl: Prepare for mounting case-insensitive enabled layers 2025-09-23 12:29:35 +02:00
params.c ovl: Prepare for mounting case-insensitive enabled layers 2025-09-23 12:29:35 +02:00
params.h ovl: Prepare for mounting case-insensitive enabled layers 2025-09-23 12:29:35 +02:00
readdir.c overlayfs updates for 6.18 2025-10-03 12:14:24 -07:00
super.c file->f_path constification 2025-10-03 16:32:36 -07:00
util.c ovl: fail ovl_lock_rename_workdir() if either target is unhashed 2025-11-28 10:42:32 +01:00
xattrs.c ovl: use wrapper ovl_revert_creds() 2024-11-11 10:45:04 +01:00