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authorJarek Poplawski <jarkao2@gmail.com>2010-01-16 01:04:04 -0800
committerDavid S. Miller <davem@davemloft.net>2010-01-16 01:04:04 -0800
commitd00c362f1b0ff54161e0a42b4554ac621a9ef92d (patch)
tree33ffeef90727309ad67690b2b7b63e1161b052ec /net/netrom/nr_route.c
parent2a04cd4c7d41c4549764734dcf5a883d304e3229 (diff)
downloadlinux-stericsson-d00c362f1b0ff54161e0a42b4554ac621a9ef92d.tar.gz
ax25: netrom: rose: Fix timer oopses
Wrong ax25_cb refcounting in ax25_send_frame() and by its callers can cause timer oopses (first reported with 2.6.29.6 kernel). Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=14905 Reported-by: Bernard Pidoux <bpidoux@free.fr> Tested-by: Bernard Pidoux <bpidoux@free.fr> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netrom/nr_route.c')
-rw-r--r--net/netrom/nr_route.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c
index aacba76070fc..e2e2d33cafdf 100644
--- a/net/netrom/nr_route.c
+++ b/net/netrom/nr_route.c
@@ -843,12 +843,13 @@ int nr_route_frame(struct sk_buff *skb, ax25_cb *ax25)
dptr = skb_push(skb, 1);
*dptr = AX25_P_NETROM;
- ax25s = ax25_send_frame(skb, 256, (ax25_address *)dev->dev_addr, &nr_neigh->callsign, nr_neigh->digipeat, nr_neigh->dev);
- if (nr_neigh->ax25 && ax25s) {
- /* We were already holding this ax25_cb */
+ ax25s = nr_neigh->ax25;
+ nr_neigh->ax25 = ax25_send_frame(skb, 256,
+ (ax25_address *)dev->dev_addr,
+ &nr_neigh->callsign,
+ nr_neigh->digipeat, nr_neigh->dev);
+ if (ax25s)
ax25_cb_put(ax25s);
- }
- nr_neigh->ax25 = ax25s;
dev_put(dev);
ret = (nr_neigh->ax25 != NULL);