FAILED: patch "[PATCH] octeontx2-af: Add array index check" failed to apply to 5.15-stable tree

The patch below does not apply to the 5.15-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y
git checkout FETCH_HEAD
git cherry-pick -x ef15ddeeb6bee87c044bf7754fac524545bf71e8
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2024040558-trustee-garage-e392@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From ef15ddeeb6bee87c044bf7754fac524545bf71e8 Mon Sep 17 00:00:00 2001
From: Aleksandr Mishin <[email protected]>
Date: Thu, 28 Mar 2024 19:55:05 +0300
Subject: [PATCH] octeontx2-af: Add array index check

In rvu_map_cgx_lmac_pf() the 'iter', which is used as an array index, can reach value (up to 14) that exceed the size (MAX_LMAC_COUNT = 8) of the array. Fix this bug by adding 'iter' value check.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

index 72e060cf6b61..e9bf9231b018 100644
@@ -160,6 +160,8 @@ static int rvu_map_cgx_lmac_pf(struct rvu *rvu)
 			continue;
 		lmac_bmap = cgx_get_lmac_bmap(rvu_cgx_pdata(cgx, rvu));
 		for_each_set_bit(iter, &lmac_bmap, rvu->hw->lmac_per_cgx) {
+			if (iter >= MAX_LMAC_COUNT)
+				continue;
 			lmac = cgx_get_lmacid(rvu_cgx_pdata(cgx, rvu),
 					      iter);
 			rvu->pf2cgxlmac_map[pf] = cgxlmac_id_to_bmap(cgx, lmac);