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tipc: Fix tipc_sk_reinit race conditions

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There are two problems with the function tipc_sk_reinit.  Firstly
it's doing a manual walk over an rhashtable.  This is broken as
an rhashtable can be resized and if you manually walk over it
during a resize then you may miss entries.

Secondly it's missing memory barriers as previously the code used
spinlocks which provide the barriers implicitly.

This patch fixes both problems.

Fixes: 07f6c4bc04 ("tipc: convert tipc reference table to...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2017-02-11 19:26:46 +08:00 • committed by David S. Miller
parent 98687f426b
commit 40f9f43970
2 changed files with 23 additions and 11 deletions
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4
net/tipc/net.c
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@ -110,6 +110,10 @@ int tipc_net_start(struct net *net, u32 addr)
char addr_string[16];
tn->own_addr = addr;
/* Ensure that the new address is visible before we reinit. */
smp_mb();
tipc_named_reinit(net);
tipc_sk_reinit(net);