From: "Gustavo A. R. Silva" gustavoars@kernel.org
stable inclusion from stable-v6.6.2 commit a2cc67b02b4b32045ba7070c7f5dd8827f12332d category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8IW7G
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 0201409079b975e46cc40e8bdff4bd61329ee10f ]
If, for any reason, the open-coded arithmetic causes a wraparound, the protection that `struct_size()` adds against potential integer overflows is defeated. Fix this by hardening call to `struct_size()` with `size_add()`.
Fixes: 3f1071ec39f7 ("net: spider_net: Use struct_size() helper") Signed-off-by: Gustavo A. R. Silva gustavoars@kernel.org Reviewed-by: Kees Cook keescook@chromium.org Signed-off-by: Geoff Levand geoff@infradead.org Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/net/ethernet/toshiba/spider_net.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/toshiba/spider_net.c b/drivers/net/ethernet/toshiba/spider_net.c index 50d7eacfec58..87e67121477c 100644 --- a/drivers/net/ethernet/toshiba/spider_net.c +++ b/drivers/net/ethernet/toshiba/spider_net.c @@ -2332,7 +2332,7 @@ spider_net_alloc_card(void) struct spider_net_card *card;
netdev = alloc_etherdev(struct_size(card, darray, - tx_descriptors + rx_descriptors)); + size_add(tx_descriptors, rx_descriptors))); if (!netdev) return NULL;