This is a note to let you know that I've just added the patch titled
9p: fix fid refcount leak in v9fs_vfs_get_link
to the 5.15-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:
9p-fix-fid-refcount-leak-in-v9fs_vfs_get_link.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e5690f263208c5abce7451370b7786eb25b405eb Mon Sep 17 00:00:00 2001
From: Dominique Martinet <asmadeus@xxxxxxxxxxxxx>
Date: Sun, 12 Jun 2022 17:14:55 +0900
Subject: 9p: fix fid refcount leak in v9fs_vfs_get_link
From: Dominique Martinet <asmadeus@xxxxxxxxxxxxx>
commit e5690f263208c5abce7451370b7786eb25b405eb upstream.
we check for protocol version later than required, after a fid has
been obtained. Just move the version check earlier.
Link: https://lkml.kernel.org/r/20220612085330.1451496-3-asmadeus@xxxxxxxxxxxxx
Fixes: 6636b6dcc3db ("9p: add refcount to p9_fid struct")
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Tyler Hicks <tyhicks@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Christian Schoenebeck <linux_oss@xxxxxxxxxxxxx>
Signed-off-by: Dominique Martinet <asmadeus@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/9p/vfs_inode.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -1228,15 +1228,15 @@ static const char *v9fs_vfs_get_link(str
return ERR_PTR(-ECHILD);
v9ses = v9fs_dentry2v9ses(dentry);
- fid = v9fs_fid_lookup(dentry);
+ if (!v9fs_proto_dotu(v9ses))
+ return ERR_PTR(-EBADF);
+
p9_debug(P9_DEBUG_VFS, "%pd\n", dentry);
+ fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid))
return ERR_CAST(fid);
- if (!v9fs_proto_dotu(v9ses))
- return ERR_PTR(-EBADF);
-
st = p9_client_stat(fid);
p9_client_clunk(fid);
if (IS_ERR(st))
Patches currently in stable-queue which might be from asmadeus@xxxxxxxxxxxxx are
queue-5.15/9p-fix-fid-refcount-leak-in-v9fs_vfs_atomic_open_dotl.patch
queue-5.15/9p-fix-fid-refcount-leak-in-v9fs_vfs_get_link.patch
queue-5.15/9p-fix-refcounting-during-full-path-walks-for-fid-lookups.patch
