diff options
Diffstat (limited to 'target/linux/generic/backport-4.19/334-v4.15-netfilter-nf_tables-fix-potential-NULL-ptr-deref-in-.patch')
| -rw-r--r-- | target/linux/generic/backport-4.19/334-v4.15-netfilter-nf_tables-fix-potential-NULL-ptr-deref-in-.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/target/linux/generic/backport-4.19/334-v4.15-netfilter-nf_tables-fix-potential-NULL-ptr-deref-in-.patch b/target/linux/generic/backport-4.19/334-v4.15-netfilter-nf_tables-fix-potential-NULL-ptr-deref-in-.patch new file mode 100644 index 0000000000..d140a33518 --- /dev/null +++ b/target/linux/generic/backport-4.19/334-v4.15-netfilter-nf_tables-fix-potential-NULL-ptr-deref-in-.patch @@ -0,0 +1,30 @@ +From: Hangbin Liu <liuhangbin@gmail.com> +Date: Mon, 25 Dec 2017 11:34:54 +0800 +Subject: [PATCH] netfilter: nf_tables: fix potential NULL-ptr deref in + nf_tables_dump_obj_done() + +If there is no NFTA_OBJ_TABLE and NFTA_OBJ_TYPE, the c.data will be NULL in +nf_tables_getobj(). So before free filter->table in nf_tables_dump_obj_done(), +we need to check if filter is NULL first. + +Fixes: e46abbcc05aa ("netfilter: nf_tables: Allow table names of up to 255 chars") +Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> +Acked-by: Phil Sutter <phil@nwl.cc> +Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> +--- + +--- a/net/netfilter/nf_tables_api.c ++++ b/net/netfilter/nf_tables_api.c +@@ -5330,8 +5330,10 @@ static int nf_tables_dump_flowtable_done + if (!filter) + return 0; + +- kfree(filter->table); +- kfree(filter); ++ if (filter) { ++ kfree(filter->table); ++ kfree(filter); ++ } + + return 0; + } |