From de3997a7eeb9ea286b15879fdf8a95aae065b4f7 Mon Sep 17 00:00:00 2001 From: "J. Bruce Fields" Date: Tue, 28 Jan 2014 16:05:15 -0500 Subject: [PATCH] nfsd4: buffer-length check for SUPPATTR_EXCLCREAT This was an omission from 8c18f2052e756e7d5dea712fc6e7ed70c00e8a39 "nfsd41: SUPPATTR_EXCLCREAT attribute". Cc: Benny Halevy Cc: stable@vger.kernel.org Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4xdr.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 63f2395c57ed..668bfe1fcdec 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -2483,6 +2483,8 @@ out_acl: goto out; } if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { + if ((buflen -= 16) < 0) + goto out_resource; WRITE32(3); WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); -- 2.39.5