From: Haowen Bai Date: Fri, 1 Apr 2022 07:10:54 +0000 (+0800) Subject: ipw2x00: Fix potential NULL dereference in libipw_xmit() X-Git-Tag: microblaze-v5.20~161^2~193^2~94 X-Git-Url: http://git.monstr.eu/?a=commitdiff_plain;h=e8366bbabe1d207cf7c5b11ae50e223ae6fc278b;p=linux-2.6-microblaze.git ipw2x00: Fix potential NULL dereference in libipw_xmit() crypt and crypt->ops could be null, so we need to checking null before dereference Signed-off-by: Haowen Bai Signed-off-by: Kalle Valo Link: https://lore.kernel.org/r/1648797055-25730-1-git-send-email-baihaowen@meizu.com --- diff --git a/drivers/net/wireless/intel/ipw2x00/libipw_tx.c b/drivers/net/wireless/intel/ipw2x00/libipw_tx.c index 36d1e6b2568d..4aec1fce1ae2 100644 --- a/drivers/net/wireless/intel/ipw2x00/libipw_tx.c +++ b/drivers/net/wireless/intel/ipw2x00/libipw_tx.c @@ -383,7 +383,7 @@ netdev_tx_t libipw_xmit(struct sk_buff *skb, struct net_device *dev) /* Each fragment may need to have room for encryption * pre/postfix */ - if (host_encrypt) + if (host_encrypt && crypt && crypt->ops) bytes_per_frag -= crypt->ops->extra_mpdu_prefix_len + crypt->ops->extra_mpdu_postfix_len;