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net: add sanity check in proto_register()
author
Eric Dumazet
<edumazet@google.com>
Wed, 16 Feb 2022 17:18:01 +0000
(09:18 -0800)
committer
Jakub Kicinski
<kuba@kernel.org>
Fri, 18 Feb 2022 04:06:06 +0000
(20:06 -0800)
prot->memory_allocated should only be set if prot->sysctl_mem
is also set.
This is a followup of commit
25206111512d
("crypto: af_alg - get
rid of alg_memory_allocated").
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link:
https://lore.kernel.org/r/20220216171801.3604366-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net/core/sock.c
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diff --git
a/net/core/sock.c
b/net/core/sock.c
index
09d31a7
..
d76218a
100644
(file)
--- a/
net/core/sock.c
+++ b/
net/core/sock.c
@@
-3718,6
+3718,10
@@
int proto_register(struct proto *prot, int alloc_slab)
{
int ret = -ENOBUFS;
+ if (prot->memory_allocated && !prot->sysctl_mem) {
+ pr_err("%s: missing sysctl_mem\n", prot->name);
+ return -EINVAL;
+ }
if (alloc_slab) {
prot->slab = kmem_cache_create_usercopy(prot->name,
prot->obj_size, 0,