From: Joshua Rogers Date: Wed, 31 Dec 2025 15:25:11 +0000 (-0500) Subject: svcrdma: bound check rq_pages index in inline path X-Git-Tag: v6.12.64~66 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f140b525180c628db8fa6c897f138194a2de417;p=thirdparty%2Fkernel%2Fstable.git svcrdma: bound check rq_pages index in inline path [ Upstream commit d1bea0ce35b6095544ee82bb54156fc62c067e58 ] 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 [ replaced rqstp->rq_maxpages with ARRAY_SIZE(rqstp->rq_pages) ] Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/sunrpc/xprtrdma/svc_rdma_rw.c b/net/sunrpc/xprtrdma/svc_rdma_rw.c index 1452630d640c1..8156dc20b852f 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 >= ARRAY_SIZE(rqstp->rq_pages)) + return -EINVAL; + page_len = min_t(unsigned int, remaining, PAGE_SIZE - head->rc_pageoff);