From: Pablo Neira Ayuso Date: Mon, 13 Sep 2021 18:38:52 +0000 (+0200) Subject: netfilter: nf_tables: Fix oversized kvmalloc() calls X-Git-Tag: v5.10.79~446 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=96f439a7eda6e80b1f45a97da7d3020b259b04a4;p=platform%2Fkernel%2Flinux-rpi.git netfilter: nf_tables: Fix oversized kvmalloc() calls commit 45928afe94a094bcda9af858b96673d59bc4a0e9 upstream. The commit 7661809d493b ("mm: don't allow oversized kvmalloc() calls") limits the max allocatable memory via kvmalloc() to MAX_INT. Reported-by: syzbot+cd43695a64bcd21b8596@syzkaller.appspotmail.com Signed-off-by: Pablo Neira Ayuso Signed-off-by: Greg Kroah-Hartman --- diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index c605a3e..b781ba9 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -4265,7 +4265,7 @@ static int nf_tables_newset(struct net *net, struct sock *nlsk, if (ops->privsize != NULL) size = ops->privsize(nla, &desc); alloc_size = sizeof(*set) + size + udlen; - if (alloc_size < size) + if (alloc_size < size || alloc_size > INT_MAX) return -ENOMEM; set = kvzalloc(alloc_size, GFP_KERNEL); if (!set)