This is a note to let you know that I've just added the patch titled
ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ksmbd-fix-unexpectedly-changed-path-in-ksmbd_vfs_ker.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4e0f543ebea232c25092b1a17619be3c1667fba4
Author: He Wang <xw897002528@xxxxxxxxx>
Date: Mon Jan 6 03:39:54 2025 +0000
ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked
[ Upstream commit 2ac538e40278a2c0c051cca81bcaafc547d61372 ]
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: c5a709f08d40 ("ksmbd: handle caseless file creation")
Signed-off-by: He Wang <xw897002528@xxxxxxxxx>
Acked-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/smb/server/vfs.c b/fs/smb/server/vfs.c
index eaae67a2f720..396d4ea77d34 100644
--- a/fs/smb/server/vfs.c
+++ b/fs/smb/server/vfs.c
@@ -1249,6 +1249,8 @@ 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)
@@ -1256,7 +1258,6 @@ 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;
}
