diff options
| author | Jan Engelhardt <jengelh@medozas.de> | 2009-04-24 19:05:21 +0400 |
|---|---|---|
| committer | Patrick McHardy <kaber@trash.net> | 2009-04-24 19:05:21 +0400 |
| commit | 37e55cf0ceb8803256bf69a3e45bd668bf90b76f (patch) | |
| tree | 9e6315efab07d0c70be0a4e7a5d27f6a554ea238 | |
| parent | 71951b64a5a87c09eb6fde59ce51aaab2fdaeab2 (diff) | |
| download | linux-37e55cf0ceb8803256bf69a3e45bd668bf90b76f.tar.xz | |
netfilter: xt_recent: fix stack overread in compat code
Related-to: commit 325fb5b4d26038cba665dd0d8ee09555321061f0
The compat path suffers from a similar problem. It only uses a __be32
when all of the recent code uses, and expects, an nf_inet_addr
everywhere. As a result, addresses stored by xt_recents were
filled with whatever other stuff was on the stack following the be32.
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
With a minor compile fix from Roman.
Reported-and-tested-by: Roman Hoog Antink <rha@open.ch>
Signed-off-by: Patrick McHardy <kaber@trash.net>
| -rw-r--r-- | net/netfilter/xt_recent.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c index 791e030ea903..eb0ceb846527 100644 --- a/net/netfilter/xt_recent.c +++ b/net/netfilter/xt_recent.c @@ -474,7 +474,7 @@ static ssize_t recent_old_proc_write(struct file *file, struct recent_table *t = pde->data; struct recent_entry *e; char buf[sizeof("+255.255.255.255")], *c = buf; - __be32 addr; + union nf_inet_addr addr = {}; int add; if (size > sizeof(buf)) @@ -506,14 +506,13 @@ static ssize_t recent_old_proc_write(struct file *file, add = 1; break; } - addr = in_aton(c); + addr.ip = in_aton(c); spin_lock_bh(&recent_lock); - e = recent_entry_lookup(t, (const void *)&addr, NFPROTO_IPV4, 0); + e = recent_entry_lookup(t, &addr, NFPROTO_IPV4, 0); if (e == NULL) { if (add) - recent_entry_init(t, (const void *)&addr, - NFPROTO_IPV4, 0); + recent_entry_init(t, &addr, NFPROTO_IPV4, 0); } else { if (add) recent_entry_update(t, e); |