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authorRalf Baechle <ralf@linux-mips.org>2005-08-23 10:11:45 -0700
committerDavid S. Miller <davem@davemloft.net>2005-08-23 10:11:45 -0700
commit01d7dd0e9f8c5f1888619d2649c7da389232b408 (patch)
treeee4f22a33557bae4883eb2f4fb1359e97ac74186 /net/ax25/ax25_route.c
parent53b924b31fa53ac3007df3fef6870d5074a9adf8 (diff)
downloadlinux-stericsson-01d7dd0e9f8c5f1888619d2649c7da389232b408.tar.gz
[AX25]: UID fixes
o Brown paperbag bug - ax25_findbyuid() was always returning a NULL pointer as the result. Breaks ROSE completly and AX.25 if UID policy set to deny. o While the list structure of AX.25's UID to callsign mapping table was properly protected by a spinlock, it's elements were not refcounted resulting in a race between removal and usage of an element. Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ax25/ax25_route.c')
-rw-r--r--net/ax25/ax25_route.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/net/ax25/ax25_route.c b/net/ax25/ax25_route.c
index 44b99b1ff9f8..c288526da4ce 100644
--- a/net/ax25/ax25_route.c
+++ b/net/ax25/ax25_route.c
@@ -422,8 +422,8 @@ static inline void ax25_adjust_path(ax25_address *addr, ax25_digi *digipeat)
*/
int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
{
+ ax25_uid_assoc *user;
ax25_route *ax25_rt;
- ax25_address *call;
int err;
if ((ax25_rt = ax25_get_route(addr, NULL)) == NULL)
@@ -434,16 +434,18 @@ int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
goto put;
}
- if ((call = ax25_findbyuid(current->euid)) == NULL) {
+ user = ax25_findbyuid(current->euid);
+ if (user) {
+ ax25->source_addr = user->call;
+ ax25_uid_put(user);
+ } else {
if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
err = -EPERM;
goto put;
}
- call = (ax25_address *)ax25->ax25_dev->dev->dev_addr;
+ ax25->source_addr = *(ax25_address *)ax25->ax25_dev->dev->dev_addr;
}
- ax25->source_addr = *call;
-
if (ax25_rt->digipeat != NULL) {
if ((ax25->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
err = -ENOMEM;