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authorHerbert Xu <herbert@gondor.apana.org.au>2006-02-02 16:59:16 -0800
committerDavid S. Miller <davem@davemloft.net>2006-02-02 16:59:16 -0800
commitf8addb3215bf58154f189017d934dfc06b62c75e (patch)
tree408ad5d1eac85858c44b68b957ae235a4ce41eed /net/ipv4/multipath_wrandom.c
parent27852c26baab8b95fc9a2b3e8a18770ecd553f10 (diff)
downloadop-kernel-dev-f8addb3215bf58154f189017d934dfc06b62c75e.zip
op-kernel-dev-f8addb3215bf58154f189017d934dfc06b62c75e.tar.gz
[IPV4] multipath_wrandom: Fix softirq-unsafe spin lock usage
The spin locks in multipath_wrandom may be obtained from either process context or softirq context depending on whether the packet is locally or remotely generated. Therefore we need to disable BH processing when taking these locks. This bug was found by Ingo's lock validator. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/multipath_wrandom.c')
-rw-r--r--net/ipv4/multipath_wrandom.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/net/ipv4/multipath_wrandom.c b/net/ipv4/multipath_wrandom.c
index d34a9fa..342d0b9 100644
--- a/net/ipv4/multipath_wrandom.c
+++ b/net/ipv4/multipath_wrandom.c
@@ -228,7 +228,7 @@ static void wrandom_set_nhinfo(__u32 network,
struct multipath_dest *d, *target_dest = NULL;
/* store the weight information for a certain route */
- spin_lock(&state[state_idx].lock);
+ spin_lock_bh(&state[state_idx].lock);
/* find state entry for gateway or add one if necessary */
list_for_each_entry_rcu(r, &state[state_idx].head, list) {
@@ -276,7 +276,7 @@ static void wrandom_set_nhinfo(__u32 network,
* we are finished
*/
- spin_unlock(&state[state_idx].lock);
+ spin_unlock_bh(&state[state_idx].lock);
}
static void __multipath_free(struct rcu_head *head)
@@ -302,7 +302,7 @@ static void wrandom_flush(void)
for (i = 0; i < MULTIPATH_STATE_SIZE; ++i) {
struct multipath_route *r;
- spin_lock(&state[i].lock);
+ spin_lock_bh(&state[i].lock);
list_for_each_entry_rcu(r, &state[i].head, list) {
struct multipath_dest *d;
list_for_each_entry_rcu(d, &r->dests, list) {
@@ -315,7 +315,7 @@ static void wrandom_flush(void)
__multipath_free);
}
- spin_unlock(&state[i].lock);
+ spin_unlock_bh(&state[i].lock);
}
}
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