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| author | Jozsef Kadlecsik <kadlec@netfilter.org> | 2021-09-06 18:26:34 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-10-07 07:53:19 +0200 |
| commit | 3213f5f8d4add82c3369f30334d105177a108e39 (patch) | |
| tree | 23a3d27ea4f47537476ffd4fe67b17171c06ee0d | |
| parent | 708107b80aa616976d1c5fa60ac0c1390749db5e (diff) | |
| download | linux-3213f5f8d4add82c3369f30334d105177a108e39.tar.gz linux-3213f5f8d4add82c3369f30334d105177a108e39.tar.bz2 linux-3213f5f8d4add82c3369f30334d105177a108e39.zip | |
netfilter: ipset: Fix oversized kvmalloc() calls
commit 7bbc3d385bd813077acaf0e6fdb2a86a901f5382 upstream.
The commit
commit 7661809d493b426e979f39ab512e3adf41fbcc69
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed Jul 14 09:45:49 2021 -0700
mm: don't allow oversized kvmalloc() calls
limits the max allocatable memory via kvmalloc() to MAX_INT. Apply the
same limit in ipset.
Reported-by: syzbot+3493b1873fb3ea827986@syzkaller.appspotmail.com
Reported-by: syzbot+2b8443c35458a617c904@syzkaller.appspotmail.com
Reported-by: syzbot+ee5cb15f4a0e85e0d54e@syzkaller.appspotmail.com
Signed-off-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/netfilter/ipset/ip_set_hash_gen.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/netfilter/ipset/ip_set_hash_gen.h b/net/netfilter/ipset/ip_set_hash_gen.h index 6186358eac7c..6e391308431d 100644 --- a/net/netfilter/ipset/ip_set_hash_gen.h +++ b/net/netfilter/ipset/ip_set_hash_gen.h @@ -130,11 +130,11 @@ htable_size(u8 hbits) { size_t hsize; - /* We must fit both into u32 in jhash and size_t */ + /* We must fit both into u32 in jhash and INT_MAX in kvmalloc_node() */ if (hbits > 31) return 0; hsize = jhash_size(hbits); - if ((((size_t)-1) - sizeof(struct htable)) / sizeof(struct hbucket *) + if ((INT_MAX - sizeof(struct htable)) / sizeof(struct hbucket *) < hsize) return 0; |