Patch "NFSD: Replace READ* macros that decode the fattr4 owner attribute" has been added to the 5.10-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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

    NFSD: Replace READ* macros that decode the fattr4 owner attribute

to the 5.10-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-replace-read-macros-that-decode-the-fattr4-owne.patch
and it can be found in the queue-5.10 subdirectory.

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



commit c7029fc2bdb407ae85a4d2fa93998b853fdffe54
Author: Chuck Lever <chuck.lever@xxxxxxxxxx>
Date:   Thu Nov 19 13:56:42 2020 -0500

    NFSD: Replace READ* macros that decode the fattr4 owner attribute
    
    [ Upstream commit 9853a5ac9be381917e9be0b4133cd4ac5a7ad875 ]
    
    Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 9dc73ab95eac9..7dc6b79e51fd0 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -360,11 +360,16 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
 		iattr->ia_valid |= ATTR_MODE;
 	}
 	if (bmval[1] & FATTR4_WORD1_OWNER) {
-		READ_BUF(4);
-		dummy32 = be32_to_cpup(p++);
-		READ_BUF(dummy32);
-		READMEM(buf, dummy32);
-		if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
+		u32 length;
+
+		if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
+			return nfserr_bad_xdr;
+		p = xdr_inline_decode(argp->xdr, length);
+		if (!p)
+			return nfserr_bad_xdr;
+		status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length,
+					      &iattr->ia_uid);
+		if (status)
 			return status;
 		iattr->ia_valid |= ATTR_UID;
 	}