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| author | Pavel Emelyanov <xemul@openvz.org> | 2008-03-26 16:49:40 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-03-26 16:49:40 -0700 |
| commit | a233352506be35aafd49c0ba8c88ca96ebde1c3d (patch) | |
| tree | 61bcc9f1f7a84ab926e0f2c8c32fe52e9124da3d /net/ipv6/route.c | |
| parent | 9b674e82b73a61844967b32e1b4ecaf8eb9d1805 (diff) | |
| download | lwn-a233352506be35aafd49c0ba8c88ca96ebde1c3d.tar.gz lwn-a233352506be35aafd49c0ba8c88ca96ebde1c3d.zip | |
[IPV6]: Fix potential net leak and oops in ipv6 routing code.
The commits f3db4851 ([NETNS][IPV6] ip6_fib - fib6_clean_all handle several
network namespaces) and 69ddb805 ([NETNS][IPV6] route6 - Make proc entry
/proc/net/rt6_stats per namespace) made some proc files per net.
Both of them introduced potential OOPS - get_proc_net can return NULL, but
this check is lost - and a struct net leak - in case single_open() fails the
previously got net is not put.
Kill all these bugs with one patch.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/route.c')
| -rw-r--r-- | net/ipv6/route.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index ac4428371432..cd82b6db35ff 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2390,10 +2390,18 @@ static int ipv6_route_show(struct seq_file *m, void *v) static int ipv6_route_open(struct inode *inode, struct file *file) { + int err; struct net *net = get_proc_net(inode); if (!net) return -ENXIO; - return single_open(file, ipv6_route_show, net); + + err = single_open(file, ipv6_route_show, net); + if (err < 0) { + put_net(net); + return err; + } + + return 0; } static int ipv6_route_release(struct inode *inode, struct file *file) @@ -2429,8 +2437,18 @@ static int rt6_stats_seq_show(struct seq_file *seq, void *v) static int rt6_stats_seq_open(struct inode *inode, struct file *file) { + int err; struct net *net = get_proc_net(inode); - return single_open(file, rt6_stats_seq_show, net); + if (!net) + return -ENXIO; + + err = single_open(file, rt6_stats_seq_show, net); + if (err < 0) { + put_net(net); + return err; + } + + return 0; } static int rt6_stats_seq_release(struct inode *inode, struct file *file) |