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authorAndrey Konovalov <andreyknvl@google.com>2019-07-29 16:35:01 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-10-07 18:53:25 +0200
commitf4118793d37fae857f2cc08246ed81f2cdcc39f9 (patch)
tree5e8e19623bccc4ad5ef11f76c03e086d0ca9aaf9
parent1e4c7ce0a9b0bdd1e64f1e4fdd3b2c9395a90440 (diff)
NFC: fix attrs checks in netlink interface
commit 18917d51472fe3b126a3a8f756c6b18085eb8130 upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--net/nfc/netlink.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index dbf74afe82fb..ad878302924f 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -973,7 +973,8 @@ static int nfc_genl_dep_link_down(struct sk_buff *skb, struct genl_info *info)
int rc;
u32 idx;
- if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+ !info->attrs[NFC_ATTR_TARGET_INDEX])
return -EINVAL;
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
@@ -1022,7 +1023,8 @@ static int nfc_genl_llc_get_params(struct sk_buff *skb, struct genl_info *info)
struct sk_buff *msg = NULL;
u32 idx;
- if (!info->attrs[NFC_ATTR_DEVICE_INDEX])
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+ !info->attrs[NFC_ATTR_FIRMWARE_NAME])
return -EINVAL;
idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);