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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2018-10-22 21:49:45 +0200 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2018-10-25 10:18:31 +0200 |
| commit | 5e91c9d9cd3fd557226ca75fed58816b9eee7e07 (patch) | |
| tree | ace9caef5db08ea65ff891c1dc2c7179a8c46225 /net/netfilter | |
| parent | 61792b677415b77c8db04991c22966bb8de7603e (diff) | |
| download | linux-5e91c9d9cd3fd557226ca75fed58816b9eee7e07.tar.gz linux-5e91c9d9cd3fd557226ca75fed58816b9eee7e07.tar.bz2 linux-5e91c9d9cd3fd557226ca75fed58816b9eee7e07.zip | |
netfilter: nft_osf: check if attribute is present
If the attribute is not sent, eg. old libnftnl binary, then
tb[NFTA_OSF_TTL] is NULL and kernel crashes from the _init path.
Fixes: a218dc82f0b5 ("netfilter: nft_osf: Add ttl option support")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nft_osf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/netfilter/nft_osf.c b/net/netfilter/nft_osf.c index ca5e5d8c5ef8..b13618c764ec 100644 --- a/net/netfilter/nft_osf.c +++ b/net/netfilter/nft_osf.c @@ -50,7 +50,7 @@ static int nft_osf_init(const struct nft_ctx *ctx, int err; u8 ttl; - if (nla_get_u8(tb[NFTA_OSF_TTL])) { + if (tb[NFTA_OSF_TTL]) { ttl = nla_get_u8(tb[NFTA_OSF_TTL]); if (ttl > 2) return -EINVAL; |