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authorLinus Torvalds <torvalds@linux-foundation.org>2013-07-17 13:43:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-17 13:43:55 -0700
commit61f98b0fca802d7e0191072606519e2230a6226d (patch)
tree2f6d5f85ea21042c0299e6204c9a99f3a7172279 /net
parentc0d15cc7ee8c0d1970197d9eb1727503bcdd2471 (diff)
parentb2781e1021525649c0b33fffd005ef219da33926 (diff)
Merge branch 'for-3.11' of git://linux-nfs.org/~bfields/linux
Pull nfsd bugfixes from Bruce Fields: "Just three minor bugfixes" * 'for-3.11' of git://linux-nfs.org/~bfields/linux: svcrdma: underflow issue in decode_write_list() nfsd4: fix minorversion support interface lockd: protect nlm_blocked access in nlmsvc_retry_blocked
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/xprtrdma/svc_rdma_marshal.c20
1 files changed, 14 insertions, 6 deletions
diff --git a/net/sunrpc/xprtrdma/svc_rdma_marshal.c b/net/sunrpc/xprtrdma/svc_rdma_marshal.c
index 8d2edddf48cf..65b146297f5a 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_marshal.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_marshal.c
@@ -98,6 +98,7 @@ void svc_rdma_rcl_chunk_counts(struct rpcrdma_read_chunk *ch,
*/
static u32 *decode_write_list(u32 *va, u32 *vaend)
{
+ unsigned long start, end;
int nchunks;
struct rpcrdma_write_array *ary =
@@ -113,9 +114,12 @@ static u32 *decode_write_list(u32 *va, u32 *vaend)
return NULL;
}
nchunks = ntohl(ary->wc_nchunks);
- if (((unsigned long)&ary->wc_array[0] +
- (sizeof(struct rpcrdma_write_chunk) * nchunks)) >
- (unsigned long)vaend) {
+
+ start = (unsigned long)&ary->wc_array[0];
+ end = (unsigned long)vaend;
+ if (nchunks < 0 ||
+ nchunks > (SIZE_MAX - start) / sizeof(struct rpcrdma_write_chunk) ||
+ (start + (sizeof(struct rpcrdma_write_chunk) * nchunks)) > end) {
dprintk("svcrdma: ary=%p, wc_nchunks=%d, vaend=%p\n",
ary, nchunks, vaend);
return NULL;
@@ -129,6 +133,7 @@ static u32 *decode_write_list(u32 *va, u32 *vaend)
static u32 *decode_reply_array(u32 *va, u32 *vaend)
{
+ unsigned long start, end;
int nchunks;
struct rpcrdma_write_array *ary =
(struct rpcrdma_write_array *)va;
@@ -143,9 +148,12 @@ static u32 *decode_reply_array(u32 *va, u32 *vaend)
return NULL;
}
nchunks = ntohl(ary->wc_nchunks);
- if (((unsigned long)&ary->wc_array[0] +
- (sizeof(struct rpcrdma_write_chunk) * nchunks)) >
- (unsigned long)vaend) {
+
+ start = (unsigned long)&ary->wc_array[0];
+ end = (unsigned long)vaend;
+ if (nchunks < 0 ||
+ nchunks > (SIZE_MAX - start) / sizeof(struct rpcrdma_write_chunk) ||
+ (start + (sizeof(struct rpcrdma_write_chunk) * nchunks)) > end) {
dprintk("svcrdma: ary=%p, wc_nchunks=%d, vaend=%p\n",
ary, nchunks, vaend);
return NULL;

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