[PATCH AUTOSEL 4.14 12/14] net: qed: fix the array may be out of bound

[Sasha Levin]

From: zhangyue <zhangyue1@xxxxxxxxxx>

[ Upstream commit 0435a4d08032c8fba2966cebdac870e22238cacc ]

If the variable 'p_bit->flags' is always 0,
the loop condition is always 0.

The variable 'j' may be greater than or equal to 32.

At this time, the array 'p_aeu->bits[32]' may be out
of bound.

Signed-off-by: zhangyue <zhangyue1@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20211125113610.273841-1-zhangyue1@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/ethernet/qlogic/qed/qed_int.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/qlogic/qed/qed_int.c b/drivers/net/ethernet/qlogic/qed/qed_int.c
index f8d1d02a3cd4a..289101ce0e409 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_int.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_int.c
@@ -865,7 +865,7 @@ static int qed_int_deassertion(struct qed_hwfn  *p_hwfn,
 		if (!parities)
 			continue;
 
-		for (j = 0, bit_idx = 0; bit_idx < 32; j++) {
+		for (j = 0, bit_idx = 0; bit_idx < 32 && j < 32; j++) {
 			struct aeu_invert_reg_bit *p_bit = &p_aeu->bits[j];
 
 			if (qed_int_is_parity_flag(p_hwfn, p_bit) &&
@@ -903,7 +903,7 @@ static int qed_int_deassertion(struct qed_hwfn  *p_hwfn,
 			 * to current group, making them responsible for the
 			 * previous assertion.
 			 */
-			for (j = 0, bit_idx = 0; bit_idx < 32; j++) {
+			for (j = 0, bit_idx = 0; bit_idx < 32 && j < 32; j++) {
 				long unsigned int bitmask;
 				u8 bit, bit_len;
 
@@ -1201,7 +1201,7 @@ static void qed_int_sb_attn_init(struct qed_hwfn *p_hwfn,
 	memset(sb_info->parity_mask, 0, sizeof(u32) * NUM_ATTN_REGS);
 	for (i = 0; i < NUM_ATTN_REGS; i++) {
 		/* j is array index, k is bit index */
-		for (j = 0, k = 0; k < 32; j++) {
+		for (j = 0, k = 0; k < 32 && j < 32; j++) {
 			struct aeu_invert_reg_bit *p_aeu;
 
 			p_aeu = &aeu_descs[i].bits[j];
-- 
2.33.0