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authorMichal Kubecek <mkubecek@suse.cz>2017-11-15 13:09:32 +0100
committerDavid S. Miller <davem@davemloft.net>2017-11-16 10:49:00 +0900
commit0a833c29d89656025443cb9f0ebff7052dd95ce0 (patch)
tree136494be53be2512054e257ae0cc0e0e4d011910 /net/nfc
parentsctp: check stream reset info len before making reconf chunk (diff)
downloadlinux-dev-0a833c29d89656025443cb9f0ebff7052dd95ce0.tar.xz
linux-dev-0a833c29d89656025443cb9f0ebff7052dd95ce0.zip
genetlink: fix genlmsg_nlhdr()
According to the description, first argument of genlmsg_nlhdr() points to what genlmsg_put() returns, i.e. beginning of user header. Therefore we should only subtract size of genetlink header and netlink message header, not user header. This also means we don't need to pass the pointer to genetlink family and the same is true for genl_dump_check_consistent() which is the only caller of genlmsg_nlhdr(). (Note that at the moment, these functions are only used for families which do not have user header so that they are not affected.) Fixes: 670dc2833d14 ("netlink: advertise incomplete dumps") Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/netlink.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index f6359c277212..c0b83dc9d993 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -75,7 +75,7 @@ static int nfc_genl_send_target(struct sk_buff *msg, struct nfc_target *target,
if (!hdr)
return -EMSGSIZE;
- genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
+ genl_dump_check_consistent(cb, hdr);
if (nla_put_u32(msg, NFC_ATTR_TARGET_INDEX, target->idx) ||
nla_put_u32(msg, NFC_ATTR_PROTOCOLS, target->supported_protocols) ||
@@ -603,7 +603,7 @@ static int nfc_genl_send_device(struct sk_buff *msg, struct nfc_dev *dev,
return -EMSGSIZE;
if (cb)
- genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
+ genl_dump_check_consistent(cb, hdr);
if (nfc_genl_setup_device_added(dev, msg))
goto nla_put_failure;
@@ -1356,7 +1356,7 @@ static int nfc_genl_send_se(struct sk_buff *msg, struct nfc_dev *dev,
goto nla_put_failure;
if (cb)
- genl_dump_check_consistent(cb, hdr, &nfc_genl_family);
+ genl_dump_check_consistent(cb, hdr);
if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, dev->idx) ||
nla_put_u32(msg, NFC_ATTR_SE_INDEX, se->idx) ||