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| author | J. Bruce Fields <bfields@redhat.com> | 2014-01-09 16:24:35 -0500 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2014-01-23 13:50:27 -0500 |
| commit | 068c34c0ce8add2e5f01ee6c85710e6fefb832ad (patch) | |
| tree | afdc7ef6f2a5d385fa7393b1d25a6d4aa1855b81 | |
| parent | 3554116d3aae25353713f3d0131d86ae6c1e5674 (diff) | |
| download | linux-068c34c0ce8add2e5f01ee6c85710e6fefb832ad.tar.gz linux-068c34c0ce8add2e5f01ee6c85710e6fefb832ad.tar.bz2 linux-068c34c0ce8add2e5f01ee6c85710e6fefb832ad.zip | |
nfsd: fix encode_entryplus_baggage stack usage
We stick an extra svc_fh in nfsd3_readdirres to save the need to
kmalloc, though maybe it would be fine to kmalloc instead.
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | fs/nfsd/nfs3xdr.c | 12 | ||||
| -rw-r--r-- | fs/nfsd/xdr3.h | 3 |
2 files changed, 9 insertions, 6 deletions
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c index 1ee6baec5fa1..de6e39e12cb3 100644 --- a/fs/nfsd/nfs3xdr.c +++ b/fs/nfsd/nfs3xdr.c @@ -842,21 +842,21 @@ out: static __be32 *encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name, int namlen) { - struct svc_fh fh; + struct svc_fh *fh = &cd->scratch; __be32 err; - fh_init(&fh, NFS3_FHSIZE); - err = compose_entry_fh(cd, &fh, name, namlen); + fh_init(fh, NFS3_FHSIZE); + err = compose_entry_fh(cd, fh, name, namlen); if (err) { *p++ = 0; *p++ = 0; goto out; } - p = encode_post_op_attr(cd->rqstp, p, &fh); + p = encode_post_op_attr(cd->rqstp, p, fh); *p++ = xdr_one; /* yes, a file handle follows */ - p = encode_fh(p, &fh); + p = encode_fh(p, fh); out: - fh_put(&fh); + fh_put(fh); return p; } diff --git a/fs/nfsd/xdr3.h b/fs/nfsd/xdr3.h index b6d5542a4ac8..335e04aaf7db 100644 --- a/fs/nfsd/xdr3.h +++ b/fs/nfsd/xdr3.h @@ -174,6 +174,9 @@ struct nfsd3_linkres { struct nfsd3_readdirres { __be32 status; struct svc_fh fh; + /* Just to save kmalloc on every readdirplus entry (svc_fh is a + * little large for the stack): */ + struct svc_fh scratch; int count; __be32 verf[2]; |