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ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked

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When `ksmbd_vfs_kern_path_locked` met an error and it is not the last
entry, it will exit without restoring changed path buffer. But later this
buffer may be used as the filename for creation.

Fixes: c5a709f08d ("ksmbd: handle caseless file creation")
Signed-off-by: He Wang <xw897002528@gmail.com>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
He Wang 2025-01-06 03:39:54 +00:00 committed by Steve French
parent c7f3cd1b24
commit 2ac538e402
1 changed files with 2 additions and 1 deletions
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3
fs/smb/server/vfs.c
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@ -1264,6 +1264,8 @@ int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *name,
filepath,
flags,
path);
if (!is_last)
next[0] = '/';
if (err)
goto out2;
else if (is_last)
@ -1271,7 +1273,6 @@ int ksmbd_vfs_kern_path_locked(struct ksmbd_work *work, char *name,
path_put(parent_path);
*parent_path = *path;
next[0] = '/';
remain_len -= filename_len + 1;
}