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netfilter: nfnetlink_acct: validate NFACCT_QUOTA parameter

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[ Upstream commit eda3fc50daa93b08774a18d51883c5a5d8d85e15 ]

If a quota bit is set in NFACCT_FLAGS but the NFACCT_QUOTA parameter is
missing then a NULL pointer dereference is triggered. CAP_NET_ADMIN is
required to trigger the bug.

Signed-off-by: Phil Turnbull <phil.turnbull@oracle.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Phil Turnbull 2016-05-03 16:39:19 -04:00 • committed by Greg Kroah-Hartman
parent ebb9ffd10a
commit 68e3b4e85a
1 changed files with 2 additions and 0 deletions
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2
net/netfilter/nfnetlink_acct.c
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@ -97,6 +97,8 @@ nfnl_acct_new(struct sock *nfnl, struct sk_buff *skb,
return -EINVAL;
if (flags & NFACCT_F_OVERQUOTA)
return -EINVAL;
if ((flags & NFACCT_F_QUOTA) && !tb[NFACCT_QUOTA])
return -EINVAL;
size += sizeof(u64);
}