CVE-2024-53151 Information

Description

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().

Reference

https://git.kernel.org/stable/c/21e1cf688fb0397788c8dd42e1e0b08d58ac5c7b https://git.kernel.org/stable/c/3c63d8946e578663b868cb9912dac616ea68bfd0 https://git.kernel.org/stable/c/4cbc3ba6dc2f746497cade60bcbaa82ae3696689 https://git.kernel.org/stable/c/838dd342962cef4c320632a5af48d3c31f2f9877 https://git.kernel.org/stable/c/c1f8195bf68edd2cef0f18a4cead394075a54b5a https://git.kernel.org/stable/c/e5c440c227ecdc721f2da0dd88b6358afd1031a7