From 2b44f1ba40914777f4b1075254ba97663d4e2574 Mon Sep 17 00:00:00 2001 From: Benny Halevy Date: Thu, 30 Sep 2010 20:47:46 +0200 Subject: [PATCH] nfsd4: adjust buflen for encoded attrs bitmap based on actual bitmap length The existing code adjusted it based on the worst case scenario for the returned bitmap and the best case scenario for the supported attrs attribute. Signed-off-by: Benny Halevy [bfields@redhat.com: removed likely/unlikely's] Signed-off-by: J. Bruce Fields --- fs/nfsd/nfs4xdr.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 1a468bbd330f..f35a94a04026 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -1805,19 +1805,23 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, goto out_nfserr; } } - if ((buflen -= 16) < 0) - goto out_resource; - if (unlikely(bmval2)) { + if (bmval2) { + if ((buflen -= 16) < 0) + goto out_resource; WRITE32(3); WRITE32(bmval0); WRITE32(bmval1); WRITE32(bmval2); - } else if (likely(bmval1)) { + } else if (bmval1) { + if ((buflen -= 12) < 0) + goto out_resource; WRITE32(2); WRITE32(bmval0); WRITE32(bmval1); } else { + if ((buflen -= 8) < 0) + goto out_resource; WRITE32(1); WRITE32(bmval0); } @@ -1828,15 +1832,17 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, u32 word1 = nfsd_suppattrs1(minorversion); u32 word2 = nfsd_suppattrs2(minorversion); - if ((buflen -= 12) < 0) - goto out_resource; if (!aclsupport) word0 &= ~FATTR4_WORD0_ACL; if (!word2) { + if ((buflen -= 12) < 0) + goto out_resource; WRITE32(2); WRITE32(word0); WRITE32(word1); } else { + if ((buflen -= 16) < 0) + goto out_resource; WRITE32(3); WRITE32(word0); WRITE32(word1); -- 2.20.1