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authorWang Hai <wanghai38@huawei.com>2020-06-09 22:18:16 +0800
committerDavid S. Miller <davem@davemloft.net>2020-06-09 13:26:23 -0700
commitc96b6acc8f89a4a7f6258dfe1d077654c11415be (patch)
tree117d45f01a2bbbebf6b8fd2158686d9133a2afa6 /net
parent976ee3b21119dcf5c6d96233d688a1453f29fa83 (diff)
downloadlinux-sh-c96b6acc8f89a4a7f6258dfe1d077654c11415be.tar.gz
dccp: Fix possible memleak in dccp_init and dccp_fini
There are some memory leaks in dccp_init() and dccp_fini(). In dccp_fini() and the error handling path in dccp_init(), free lhash2 is missing. Add inet_hashinfo2_free_mod() to do it. If inet_hashinfo2_init_mod() failed in dccp_init(), percpu_counter_destroy() should be called to destroy dccp_orphan_count. It need to goto out_free_percpu when inet_hashinfo2_init_mod() failed. Fixes: c92c81df93df ("net: dccp: fix kernel crash on module load") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Wang Hai <wanghai38@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/dccp/proto.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index 4af8a98fe784..c13b6609474b 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -1139,14 +1139,14 @@ static int __init dccp_init(void)
inet_hashinfo_init(&dccp_hashinfo);
rc = inet_hashinfo2_init_mod(&dccp_hashinfo);
if (rc)
- goto out_fail;
+ goto out_free_percpu;
rc = -ENOBUFS;
dccp_hashinfo.bind_bucket_cachep =
kmem_cache_create("dccp_bind_bucket",
sizeof(struct inet_bind_bucket), 0,
SLAB_HWCACHE_ALIGN, NULL);
if (!dccp_hashinfo.bind_bucket_cachep)
- goto out_free_percpu;
+ goto out_free_hashinfo2;
/*
* Size and allocate the main established and bind bucket
@@ -1242,6 +1242,8 @@ out_free_dccp_ehash:
free_pages((unsigned long)dccp_hashinfo.ehash, ehash_order);
out_free_bind_bucket_cachep:
kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
+out_free_hashinfo2:
+ inet_hashinfo2_free_mod(&dccp_hashinfo);
out_free_percpu:
percpu_counter_destroy(&dccp_orphan_count);
out_fail:
@@ -1265,6 +1267,7 @@ static void __exit dccp_fini(void)
kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep);
dccp_ackvec_exit();
dccp_sysctl_exit();
+ inet_hashinfo2_free_mod(&dccp_hashinfo);
percpu_counter_destroy(&dccp_orphan_count);
}