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netfilter: nf_tables: Fix oversized kvmalloc() calls

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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 <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pablo Neira Ayuso 2021-09-13 20:38:52 +02:00 committed by Greg Kroah-Hartman
parent e2d192301a
commit 96f439a7ed
1 changed files with 1 additions and 1 deletions
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2
net/netfilter/nf_tables_api.c
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@ -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)