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NFC: fix attrs checks in netlink interface
nfc_genl_deactivate_target() relies on the NFC_ATTR_TARGET_INDEX attribute being present, but doesn't check whether it is actually provided by the user. Same goes for nfc_genl_fw_download() and NFC_ATTR_FIRMWARE_NAME. This patch adds appropriate checks. Found with syzkaller. Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -970,7 +970,8 @@ static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
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int rc;
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u32 idx;
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if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
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if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
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!info->attrs[NFC_ATTR_TARGET_INDEX])
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return -EINVAL;
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idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
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@ -1018,7 +1019,8 @@ static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
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struct sk_buff *msg = NULL;
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u32 idx;
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if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
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if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
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!info->attrs[NFC_ATTR_FIRMWARE_NAME])
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return -EINVAL;
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idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
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