From d1bea0ce35b6095544ee82bb54156fc62c067e58 Mon Sep 17 00:00:00 2001 From: Joshua Rogers Date: Fri, 7 Nov 2025 10:09:49 -0500 Subject: [PATCH] svcrdma: bound check rq_pages index in inline path svc_rdma_copy_inline_range indexed rqstp->rq_pages[rc_curpage] without verifying rc_curpage stays within the allocated page array. Add guards before the first use and after advancing to a new page. Fixes: d7cc73972661 ("svcrdma: support multiple Read chunks per RPC") Cc: stable@vger.kernel.org Signed-off-by: Joshua Rogers Signed-off-by: Chuck Lever --- net/sunrpc/xprtrdma/svc_rdma_rw.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/sunrpc/xprtrdma/svc_rdma_rw.c b/net/sunrpc/xprtrdma/svc_rdma_rw.c index e813e5463352..310de7a80be5 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_rw.c +++ b/net/sunrpc/xprtrdma/svc_rdma_rw.c @@ -841,6 +841,9 @@ static int svc_rdma_copy_inline_range(struct svc_rqst *rqstp, for (page_no = 0; page_no < numpages; page_no++) { unsigned int page_len; + if (head->rc_curpage >= rqstp->rq_maxpages) + return -EINVAL; + page_len = min_t(unsigned int, remaining, PAGE_SIZE - head->rc_pageoff);