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authorDaniel Borkmann <daniel@iogearbox.net>2015-02-05 18:44:04 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-03-18 13:22:25 +0100
commit1671763b751e35debe0d0e5b3877e393c4e6ec97 (patch)
tree8c7f12e8109674ec62e3b8f71c8f350f360409cc /net
parent389fb5fb0b8b812ce0e853d5eca748b08fc73289 (diff)
downloadlinux-linaro-stable-1671763b751e35debe0d0e5b3877e393c4e6ec97.tar.gz
rtnetlink: ifla_vf_policy: fix misuses of NLA_BINARY
[ Upstream commit 364d5716a7adb91b731a35765d369602d68d2881 ] ifla_vf_policy[] is wrong in advertising its individual member types as NLA_BINARY since .type = NLA_BINARY in combination with .len declares the len member as *max* attribute length [0, len]. The issue is that when do_setvfinfo() is being called to set up a VF through ndo handler, we could set corrupted data if the attribute length is less than the size of the related structure itself. The intent is exactly the opposite, namely to make sure to pass at least data of minimum size of len. Fixes: ebc08a6f47ee ("rtnetlink: Add VF config code to rtnetlink") Cc: Mitch Williams <mitch.a.williams@intel.com> Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
-rw-r--r--net/core/rtnetlink.c12
1 files changed, 4 insertions, 8 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 279b5dcf09ae..72fd097c3fc6 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -1138,14 +1138,10 @@ static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = {
};
static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
- [IFLA_VF_MAC] = { .type = NLA_BINARY,
- .len = sizeof(struct ifla_vf_mac) },
- [IFLA_VF_VLAN] = { .type = NLA_BINARY,
- .len = sizeof(struct ifla_vf_vlan) },
- [IFLA_VF_TX_RATE] = { .type = NLA_BINARY,
- .len = sizeof(struct ifla_vf_tx_rate) },
- [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY,
- .len = sizeof(struct ifla_vf_spoofchk) },
+ [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) },
+ [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) },
+ [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) },
+ [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) },
};
static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = {