This is a note to let you know that I've just added the patch titled
nfsd: ignore requests to disable unsupported versions
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:
nfsd-ignore-requests-to-disable-unsupported-versions.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.
commit 5b3d84f8c32c44167d6c0cd453d2434fc9b22180
Author: Jeff Layton <jlayton@xxxxxxxxxx>
Date: Tue Oct 18 07:47:54 2022 -0400
nfsd: ignore requests to disable unsupported versions
[ Upstream commit 8e823bafff2308753d430566256c83d8085952da ]
The kernel currently errors out if you attempt to enable or disable a
version that it doesn't recognize. Change it to ignore attempts to
disable an unrecognized version. If we don't support it, then there is
no harm in doing so.
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
Reviewed-by: Tom Talpey <tom@xxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index dc74a947a440c..68ed42fd29fc8 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -601,7 +601,9 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
}
break;
default:
- return -EINVAL;
+ /* Ignore requests to disable non-existent versions */
+ if (cmd == NFSD_SET)
+ return -EINVAL;
}
vers += len + 1;
} while ((len = qword_get(&mesg, vers, size)) > 0);
