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ipv4: Fix memory leak in exception case for splitting tries 

Fix a small memory leak that can occur where we leak a fib_alias in the
event of us not being able to insert it into the local table.

Fixes: 0ddcf43d5d ("ipv4: FIB Local/MAIN table collapse")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2016-11-15 05:46:12 -05:00 committed by David S. Miller
parent 3b7093346b
commit 3114cdfe66
1 changed files with 3 additions and 1 deletions
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4
net/ipv4/fib_trie.c
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@ -1743,8 +1743,10 @@ struct fib_table *fib_trie_unmerge(struct fib_table *oldtb)
local_l = fib_find_node(lt, &local_tp, l->key); local_l = fib_find_node(lt, &local_tp, l->key);
if (fib_insert_alias(lt, local_tp, local_l, new_fa, if (fib_insert_alias(lt, local_tp, local_l, new_fa,
NULL, l->key)) NULL, l->key)) {
kmem_cache_free(fn_alias_kmem, new_fa);
goto out; goto out;
}
} }
/* stop loop if key wrapped back to 0 */ /* stop loop if key wrapped back to 0 */