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. Fixes: 91c6945 ("octeontx2-af: cn10k: Add RPM MAC support") Signed-off-by: Aleksandr Mishin <[email protected]> Signed-off-by: David S. Miller <[email protected]>
arthurauffray · Apr 3, 2024 · ef15dde · ef15dde
1 parent c53fe72
commit ef15dde
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_cgx.c
@@ -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);