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fib: Fix fib zone and its hash leak on namespace stop 

When we stop a namespace we flush the table and free one, but the
added fn_zone-s (and their hashes if grown) are leaked. Need to free.
Tries releases all its stuff in the flushing code.

Shame on us - this bug exists since the very first make-fib-per-net
patches in 2.6.27 :(

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2010-10-28 02:00:43 +00:00 committed by David S. Miller
parent b1424ed910
commit 4aa2c466a7
4 changed files with 26 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/ip_fib.h
View File

@ -158,6 +158,8 @@ extern int fib_table_flush(struct fib_table *table);
extern void fib_table_select_default(struct fib_table *table,
const struct flowi *flp,
struct fib_result *res);
extern void fib_free_table(struct fib_table *tb);
#ifndef CONFIG_IP_MULTIPLE_TABLES

2
net/ipv4/fib_frontend.c
View File

@ -1052,7 +1052,7 @@ static void ip_fib_net_exit(struct net *net)
hlist_for_each_entry_safe(tb, node, tmp, head, tb_hlist) {
hlist_del(node);
fib_table_flush(tb);
kfree(tb);
fib_free_table(tb);
}
}
kfree(net->ipv4.fib_table_hash);

18
net/ipv4/fib_hash.c
View File

@ -716,6 +716,24 @@ int fib_table_flush(struct fib_table *tb)
return found;
}
void fib_free_table(struct fib_table *tb)
{
struct fn_hash *table = (struct fn_hash *) tb->tb_data;
struct fn_zone *fz, *next;
next = table->fn_zone_list;
while (next != NULL) {
fz = next;
next = fz->fz_next;
if (fz->fz_hash != fz->fz_embedded_hash)
fz_hash_free(fz->fz_hash, fz->fz_divisor);
kfree(fz);
}
kfree(tb);
}
static inline int
fn_hash_dump_bucket(struct sk_buff *skb, struct netlink_callback *cb,

5
net/ipv4/fib_trie.c
View File

@ -1797,6 +1797,11 @@ int fib_table_flush(struct fib_table *tb)
return found;
}
void fib_free_table(struct fib_table *tb)
{
kfree(tb);
}
void fib_table_select_default(struct fib_table *tb,
const struct flowi *flp,
struct fib_result *res)