net: ieee802154: nl-mac: fix check on panid
This patch fixes a null pointer derefence for panid handle by move the check for the netlink variable directly before accessing them. Reported-by: syzbot+d4c07de0144f6f63be3a@syzkaller.appspotmail.com Signed-off-by: Alexander Aring <aahringo@redhat.com> Link: https://lore.kernel.org/r/20210228151817.95700-4-aahringo@redhat.com Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
This commit is contained in:
Родитель
27c746869e
Коммит
6f7f657f24
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@ -551,9 +551,7 @@ ieee802154_llsec_parse_key_id(struct genl_info *info,
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desc->mode = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_KEY_MODE]);
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desc->mode = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_KEY_MODE]);
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if (desc->mode == IEEE802154_SCF_KEY_IMPLICIT) {
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if (desc->mode == IEEE802154_SCF_KEY_IMPLICIT) {
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if (!info->attrs[IEEE802154_ATTR_PAN_ID] &&
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if (!info->attrs[IEEE802154_ATTR_PAN_ID])
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!(info->attrs[IEEE802154_ATTR_SHORT_ADDR] ||
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info->attrs[IEEE802154_ATTR_HW_ADDR]))
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return -EINVAL;
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return -EINVAL;
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desc->device_addr.pan_id = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_PAN_ID]);
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desc->device_addr.pan_id = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_PAN_ID]);
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@ -562,6 +560,9 @@ ieee802154_llsec_parse_key_id(struct genl_info *info,
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desc->device_addr.mode = IEEE802154_ADDR_SHORT;
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desc->device_addr.mode = IEEE802154_ADDR_SHORT;
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desc->device_addr.short_addr = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_SHORT_ADDR]);
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desc->device_addr.short_addr = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_SHORT_ADDR]);
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} else {
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} else {
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if (!info->attrs[IEEE802154_ATTR_HW_ADDR])
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return -EINVAL;
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desc->device_addr.mode = IEEE802154_ADDR_LONG;
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desc->device_addr.mode = IEEE802154_ADDR_LONG;
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desc->device_addr.extended_addr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
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desc->device_addr.extended_addr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]);
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}
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}
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