octeontx2-af: Add array index check

commit ef15ddeeb6 upstream.

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: 91c6945ea1 ("octeontx2-af: cn10k: Add RPM MAC support")
Signed-off-by: Aleksandr Mishin <amishin@t-argos.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aleksandr Mishin 2024-03-28 19:55:05 +03:00 committed by Greg Kroah-Hartman
parent 43b69da260
commit 76c39cf84c

View file

@ -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);