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| author | Phil Turnbull <phil.turnbull@oracle.com> | 2016-02-24 21:34:43 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2016-02-29 13:27:21 +0100 |
| commit | 017b1b6d28c479f1ad9a7a41f775545a3e1cba35 (patch) | |
| tree | 595556370e0d68c347acfa0b8560e16623d57de8 /net | |
| parent | net: ndo_fdb_dump should report -EMSGSIZE to rtnl_fdb_dump. (diff) | |
| download | linux-017b1b6d28c479f1ad9a7a41f775545a3e1cba35.tar.xz linux-017b1b6d28c479f1ad9a7a41f775545a3e1cba35.zip | |
netfilter: nfnetlink_acct: validate NFACCT_FILTER parameters
nfacct_filter_alloc doesn't validate the NFACCT_FILTER_MASK and
NFACCT_FILTER_VALUE parameters which can trigger a NULL pointer
dereference. 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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/netfilter/nfnetlink_acct.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/netfilter/nfnetlink_acct.c b/net/netfilter/nfnetlink_acct.c index 5274b04c42a6..4c2b4c0c4d5f 100644 --- a/net/netfilter/nfnetlink_acct.c +++ b/net/netfilter/nfnetlink_acct.c @@ -242,6 +242,9 @@ nfacct_filter_alloc(const struct nlattr * const attr) if (err < 0) return ERR_PTR(err); + if (!tb[NFACCT_FILTER_MASK] || !tb[NFACCT_FILTER_VALUE]) + return ERR_PTR(-EINVAL); + filter = kzalloc(sizeof(struct nfacct_filter), GFP_KERNEL); if (!filter) return ERR_PTR(-ENOMEM); |