Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 03/21] netfilter: nfnetlink_acct: validate NFACCT_QUOTA parameter | Date | Fri, 9 Aug 2019 15:45:07 +0200 |
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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> --- net/netfilter/nfnetlink_acct.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/net/netfilter/nfnetlink_acct.c +++ b/net/netfilter/nfnetlink_acct.c @@ -97,6 +97,8 @@ nfnl_acct_new(struct sock *nfnl, struct return -EINVAL; if (flags & NFACCT_F_OVERQUOTA) return -EINVAL; + if ((flags & NFACCT_F_QUOTA) && !tb[NFACCT_QUOTA]) + return -EINVAL; size += sizeof(u64); }
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