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| author | J. Bruce Fields <bfields@redhat.com> | 2017-05-16 21:57:42 +0200 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2017-05-16 22:16:30 +0200 |
| commit | 9512a16b0e1217bbef73d276a67c28b5fbb46512 (patch) | |
| tree | 3ac6cb7ced49e46ff3cc5278fa9de26240531968 /fs/nfsd/nfs3xdr.c | |
| parent | Linux 4.12-rc1 (diff) | |
| download | linux-9512a16b0e1217bbef73d276a67c28b5fbb46512.tar.xz linux-9512a16b0e1217bbef73d276a67c28b5fbb46512.zip | |
nfsd: Revert "nfsd: check for oversized NFSv2/v3 arguments"
This reverts commit 51f567777799 "nfsd: check for oversized NFSv2/v3
arguments", which breaks support for NFSv3 ACLs.
That patch was actually an earlier draft of a fix for the problem that
was eventually fixed by e6838a29ecb "nfsd: check for oversized NFSv2/v3
arguments". But somehow I accidentally left this earlier draft in the
branch that was part of my 2.12 pull request.
Reported-by: Eryu Guan <eguan@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd/nfs3xdr.c')
| -rw-r--r-- | fs/nfsd/nfs3xdr.c | 23 |
1 files changed, 6 insertions, 17 deletions
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c index 12feac6ee2fd..452334694a5d 100644 --- a/fs/nfsd/nfs3xdr.c +++ b/fs/nfsd/nfs3xdr.c @@ -334,11 +334,8 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, if (!p) return 0; p = xdr_decode_hyper(p, &args->offset); - args->count = ntohl(*p++); - - if (!xdr_argsize_check(rqstp, p)) - return 0; + args->count = ntohl(*p++); len = min(args->count, max_blocksize); /* set up the kvec */ @@ -352,7 +349,7 @@ nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p, v++; } args->vlen = v; - return 1; + return xdr_argsize_check(rqstp, p); } int @@ -544,11 +541,9 @@ nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p, p = decode_fh(p, &args->fh); if (!p) return 0; - if (!xdr_argsize_check(rqstp, p)) - return 0; args->buffer = page_address(*(rqstp->rq_next_page++)); - return 1; + return xdr_argsize_check(rqstp, p); } int @@ -574,14 +569,10 @@ nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p, args->verf = p; p += 2; args->dircount = ~0; args->count = ntohl(*p++); - - if (!xdr_argsize_check(rqstp, p)) - return 0; - args->count = min_t(u32, args->count, PAGE_SIZE); args->buffer = page_address(*(rqstp->rq_next_page++)); - return 1; + return xdr_argsize_check(rqstp, p); } int @@ -599,9 +590,6 @@ nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p, args->dircount = ntohl(*p++); args->count = ntohl(*p++); - if (!xdr_argsize_check(rqstp, p)) - return 0; - len = args->count = min(args->count, max_blocksize); while (len > 0) { struct page *p = *(rqstp->rq_next_page++); @@ -609,7 +597,8 @@ nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p, args->buffer = page_address(p); len -= PAGE_SIZE; } - return 1; + + return xdr_argsize_check(rqstp, p); } int |