net: atlantic: add check for MAX_SKB_FRAGS

stable inclusion
from stable-v5.10.118
commit cd66ab20a8f84474564a68fffffd37d998f6c340
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5L686

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=cd66ab20a8f84474564a68fffffd37d998f6c340

--------------------------------

[ Upstream commit 6aecbba1 ]

Enforce that the CPU can not get stuck in an infinite loop.
Reported-by: NAashay Shringarpure <aashay@google.com>
Reported-by: NYi Chou <yich@google.com>
Reported-by: NShervin Oloumi <enlightened@google.com>
Signed-off-by: NGrant Grundler <grundler@chromium.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/net/ethernet/aquantia/atlantic/aq_ring.c

@@ -362,6 +362,7 @@ int aq_ring_rx_clean(struct aq_ring_s *self,
 			continue;
 
 		if (!buff->is_eop) {
+			unsigned int frag_cnt = 0U;
 			buff_ = buff;
 			do {
 				bool is_rsc_completed = true;
@@ -370,6 +371,8 @@ int aq_ring_rx_clean(struct aq_ring_s *self,
 					err = -EIO;
 					goto err_exit;
 				}
+
+				frag_cnt++;
 				next_ = buff_->next,
 				buff_ = &self->buff_ring[next_];
 				is_rsc_completed =
@@ -377,7 +380,8 @@ int aq_ring_rx_clean(struct aq_ring_s *self,
 							    next_,
 							    self->hw_head);
 
-				if (unlikely(!is_rsc_completed)) {
+				if (unlikely(!is_rsc_completed) ||
+						frag_cnt > MAX_SKB_FRAGS) {
 					err = 0;
 					goto err_exit;
 				}