CVE-2024-53151

In the Linux kernel, the following vulnerability has been resolved:

svcrdma: Address an integer overflow

Dan Carpenter reports:

> Commit 78147ca8b4a9 ("svcrdma: Add a "parsed chunk list" data

> structure") from Jun 22, 2020 (linux-next), leads to the following

> Smatch static checker warning:

>

> net/sunrpc/xprtrdma/svc_rdma_recvfrom.c:498 xdr_check_write_chunk()

> warn: potential user controlled sizeof overflow 'segcount * 4 * 4'

>

> net/sunrpc/xprtrdma/svc_rdma_recvfrom.c

> 488 static bool xdr_check_write_chunk(struct svc_rdma_recv_ctxt *rctxt)

> 489 {

> 490 u32 segcount;

> 491 __be32 *p;

> 492

> 493 if (xdr_stream_decode_u32(&rctxt->rc_stream, &segcount))

> ^^^^^^^^

>

> 494 return false;

> 495

> 496 /* A bogus segcount causes this buffer overflow check to fail. */

> 497 p = xdr_inline_decode(&rctxt->rc_stream,

> --> 498 segcount * rpcrdma_segment_maxsz * sizeof(*p));

>

>

> segcount is an untrusted u32. On 32bit systems anything >= SIZE_MAX / 16 will

> have an integer overflow and some those values will be accepted by

> xdr_inline_decode().