Patch "9p: Fix initialisation of netfs_inode for 9p" has been added to the 6.6-stable tree

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This is a note to let you know that I've just added the patch titled

    9p: Fix initialisation of netfs_inode for 9p

to the 6.6-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-initialisation-of-netfs_inode-for-9p.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 34e1c00336c8d59fce1a6f0c716ef9eda0d19583
Author: David Howells <dhowells@xxxxxxxxxx>
Date:   Tue Jan 2 20:33:17 2024 +0000

    9p: Fix initialisation of netfs_inode for 9p
    
    [ Upstream commit 9546ac78b232bac56ff975072b1965e0e755ebd4 ]
    
    The 9p filesystem is calling netfs_inode_init() in v9fs_init_inode() -
    before the struct inode fields have been initialised from the obtained file
    stats (ie. after v9fs_stat2inode*() has been called), but netfslib wants to
    set a couple of its fields from i_size.
    
    Reported-by: Marc Dionne <marc.dionne@xxxxxxxxxxxx>
    Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
    Tested-by: Marc Dionne <marc.dionne@xxxxxxxxxxxx>
    Tested-by: Dominique Martinet <asmadeus@xxxxxxxxxxxxx>
    Acked-by: Dominique Martinet <asmadeus@xxxxxxxxxxxxx>
    cc: Eric Van Hensbergen <ericvh@xxxxxxxxxx>
    cc: Latchesar Ionkov <lucho@xxxxxxxxxx>
    cc: Dominique Martinet <asmadeus@xxxxxxxxxxxxx>
    cc: Christian Schoenebeck <linux_oss@xxxxxxxxxxxxx>
    cc: v9fs@xxxxxxxxxxxxxxx
    cc: linux-cachefs@xxxxxxxxxx
    cc: linux-fsdevel@xxxxxxxxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index cdf441f22e07..dcce42d55d68 100644
--- a/fs/9p/v9fs_vfs.h
+++ b/fs/9p/v9fs_vfs.h
@@ -42,6 +42,7 @@ struct inode *v9fs_alloc_inode(struct super_block *sb);
 void v9fs_free_inode(struct inode *inode);
 struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode,
 			     dev_t rdev);
+void v9fs_set_netfs_context(struct inode *inode);
 int v9fs_init_inode(struct v9fs_session_info *v9ses,
 		    struct inode *inode, umode_t mode, dev_t rdev);
 void v9fs_evict_inode(struct inode *inode);
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 0d28ecf668d0..ea695c4a7a3f 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -246,7 +246,7 @@ void v9fs_free_inode(struct inode *inode)
 /*
  * Set parameters for the netfs library
  */
-static void v9fs_set_netfs_context(struct inode *inode)
+void v9fs_set_netfs_context(struct inode *inode)
 {
 	struct v9fs_inode *v9inode = V9FS_I(inode);
 	netfs_inode_init(&v9inode->netfs, &v9fs_req_ops);
@@ -326,8 +326,6 @@ int v9fs_init_inode(struct v9fs_session_info *v9ses,
 		err = -EINVAL;
 		goto error;
 	}
-
-	v9fs_set_netfs_context(inode);
 error:
 	return err;
 
@@ -359,6 +357,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev)
 		iput(inode);
 		return ERR_PTR(err);
 	}
+	v9fs_set_netfs_context(inode);
 	return inode;
 }
 
@@ -464,6 +463,7 @@ static struct inode *v9fs_qid_iget(struct super_block *sb,
 		goto error;
 
 	v9fs_stat2inode(st, inode, sb, 0);
+	v9fs_set_netfs_context(inode);
 	v9fs_cache_inode_get_cookie(inode);
 	unlock_new_inode(inode);
 	return inode;
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 1312f68965ac..91bcee2ab3c4 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -128,6 +128,7 @@ static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
 		goto error;
 
 	v9fs_stat2inode_dotl(st, inode, 0);
+	v9fs_set_netfs_context(inode);
 	v9fs_cache_inode_get_cookie(inode);
 	retval = v9fs_get_acl(inode, fid);
 	if (retval)




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