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RDMA/iwpm: fix memory leak on map_info

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[ Upstream commit f96416cea7bce9afe619c15e87fced70f93f9098 ]

In the cases where iwpm_hash_bucket is NULL and where function
get_mapinfo_hash_bucket returns NULL then the map_info is never added
to hash_bucket_head and hence there is a leak of map_info. Fix this
by nullifying hash_bucket_head and if that is null we know that
that map_info was not added to hash_bucket_head and hence map_info
should be free'd.

Detected by CoverityScan, CID#1222481 ("Resource Leak")

Fixes: 30dc5e63d6a5 ("RDMA/core: Add support for iWARP Port Mapper user space service")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Ian King 2018-04-25 17:24:04 +01:00 committed by Greg Kroah-Hartman
parent 019ce25a4e
commit d2be557eef
1 changed files with 4 additions and 1 deletions
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5
drivers/infiniband/core/iwpm_util.c
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@ -114,7 +114,7 @@ int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr,
struct sockaddr_storage *mapped_sockaddr,
u8 nl_client)
{
struct hlist_head *hash_bucket_head;
struct hlist_head *hash_bucket_head = NULL;
struct iwpm_mapping_info *map_info;
unsigned long flags;
int ret = -EINVAL;
@ -142,6 +142,9 @@ int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr,
}
}
spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags);
if (!hash_bucket_head)
kfree(map_info);
return ret;
}