Prev: [128/145] USB: cp210x: Add 81E8 (Zephyr Bioharness)
Next: [118/145] USB: fix the idProduct value for USB-3.0 root hubs
From: Greg KH on 12 Mar 2010 19:50
2.6.32-stable review patch. If anyone has any objections, please let me know.

----------------
From: Trond Myklebust <Trond.Myklebust(a)netapp.com>

commit ebed9203b68a4f333ce5d17e874b26c3afcfeff1 upstream.

sunrpc_cache_update() will always call detail->update() from inside the
detail->hash_lock, so it cannot allocate memory.

Signed-off-by: Trond Myklebust <Trond.Myklebust(a)netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
fs/nfs/dns_resolve.c | 18 +++++++++++++++---
1 file changed, 15 insertions(+), 3 deletions(-)

--- a/fs/nfs/dns_resolve.c
+++ b/fs/nfs/dns_resolve.c
@@ -36,6 +36,19 @@ struct nfs_dns_ent {
};


+static void nfs_dns_ent_update(struct cache_head *cnew,
+ struct cache_head *ckey)
+{
+ struct nfs_dns_ent *new;
+ struct nfs_dns_ent *key;
+
+ new = container_of(cnew, struct nfs_dns_ent, h);
+ key = container_of(ckey, struct nfs_dns_ent, h);
+
+ memcpy(&new->addr, &key->addr, key->addrlen);
+ new->addrlen = key->addrlen;
+}
+
static void nfs_dns_ent_init(struct cache_head *cnew,
struct cache_head *ckey)
{
@@ -49,8 +62,7 @@ static void nfs_dns_ent_init(struct cach
new->hostname = kstrndup(key->hostname, key->namelen, GFP_KERNEL);
if (new->hostname) {
new->namelen = key->namelen;
- memcpy(&new->addr, &key->addr, key->addrlen);
- new->addrlen = key->addrlen;
+ nfs_dns_ent_update(cnew, ckey);
} else {
new->namelen = 0;
new->addrlen = 0;
@@ -234,7 +246,7 @@ static struct cache_detail nfs_dns_resol
.cache_show = nfs_dns_show,
.match = nfs_dns_match,
.init = nfs_dns_ent_init,
- .update = nfs_dns_ent_init,
+ .update = nfs_dns_ent_update,
.alloc = nfs_dns_ent_alloc,
};



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [128/145] USB: cp210x: Add 81E8 (Zephyr Bioharness)
Next: [118/145] USB: fix the idProduct value for USB-3.0 root hubs