diff options
| author | Wang Hai <wanghai38@huawei.com> | 2020-06-09 22:18:16 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-17 16:42:01 +0200 |
| commit | 1e64ca668051910241499c44750011101b48ee30 (patch) | |
| tree | 3b5264b0b9d8ec0f963cb6b5d480f66a03ae2787 | |
| parent | cf39fe5340fc377fa57f828403e56a746c7a0583 (diff) | |
dccp: Fix possible memleak in dccp_init and dccp_fini
[ Upstream commit c96b6acc8f89a4a7f6258dfe1d077654c11415be ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/net/inet_hashtables.h | 6 | ||||
| -rw-r--r-- | net/dccp/proto.c | 7 |
2 files changed, 11 insertions, 2 deletions
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h index d0019d3395cf..59802eb8d2cc 100644 --- a/include/net/inet_hashtables.h +++ b/include/net/inet_hashtables.h @@ -185,6 +185,12 @@ static inline spinlock_t *inet_ehash_lockp( int inet_ehash_locks_alloc(struct inet_hashinfo *hashinfo); +static inline void inet_hashinfo2_free_mod(struct inet_hashinfo *h) +{ + kfree(h->lhash2); + h->lhash2 = NULL; +} + static inline void inet_ehash_locks_free(struct inet_hashinfo *hashinfo) { kvfree(hashinfo->ehash_locks); 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); } |