The patch titled
v9fs: don't use primary fid when removing file
has been added to the -mm tree. Its filename is
v9fs-dont-use-primary-fid-when-removing-file.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: v9fs: don't use primary fid when removing file
From: "Latchesar Ionkov" <lucho@xxxxxxxxxx>
v9fs_insert uses v9fs_fid_lookup (which also locks the fid) to get the
primary fid associated with the dentry and destroys the v9fs_fid struct
after removing the file. If another process called v9fs_fid_lookup on the
same dentry, it may wait undefinitely for the fid's lock (as the struct is
freed).
This patch changes v9fs_remove to use a cloned fid, so the primary fid is
not locked and freed.
Signed-off-by: Latchesar Ionkov <lucho@xxxxxxxxxx>
Cc: Eric Van Hensbergen <ericvh@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/9p/vfs_inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/9p/vfs_inode.c~v9fs-dont-use-primary-fid-when-removing-file fs/9p/vfs_inode.c
--- a/fs/9p/vfs_inode.c~v9fs-dont-use-primary-fid-when-removing-file
+++ a/fs/9p/vfs_inode.c
@@ -415,7 +415,7 @@ static int v9fs_remove(struct inode *dir
file_inode = file->d_inode;
sb = file_inode->i_sb;
v9ses = v9fs_inode2v9ses(file_inode);
- v9fid = v9fs_fid_lookup(file);
+ v9fid = v9fs_fid_clone(file);
if(IS_ERR(v9fid))
return PTR_ERR(v9fid);
_
Patches currently in -mm which might be from lucho@xxxxxxxxxx are
v9fs-dont-use-primary-fid-when-removing-file.patch
-
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