diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2005-08-23 21:11:45 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2005-08-23 21:11:45 +0400 |
| commit | 01d7dd0e9f8c5f1888619d2649c7da389232b408 (patch) | |
| tree | ee4f22a33557bae4883eb2f4fb1359e97ac74186 /net/ax25/ax25_route.c | |
| parent | 53b924b31fa53ac3007df3fef6870d5074a9adf8 (diff) | |
| download | linux-01d7dd0e9f8c5f1888619d2649c7da389232b408.tar.xz | |
[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.c | 12 |
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; |