diff options
| author | Eric Dumazet <edumazet@google.com> | 2015-07-06 17:13:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-09-29 19:26:20 +0200 |
| commit | bd60ae48f727ef6cb9b0524fb49b7336cbb0ca66 (patch) | |
| tree | 6d3e306e97bf50cf6c5ef3245cf8cf64b740ca61 | |
| parent | 56fd491a29b829fac4ffb30f1fcec2b386455ad0 (diff) | |
net: graceful exit from netif_alloc_netdev_queues()
[ Upstream commit d339727c2b1a10f25e6636670ab6e1841170e328 ]
User space can crash kernel with
ip link add ifb10 numtxqueues 100000 type ifb
We must replace a BUG_ON() by proper test and return -EINVAL for
crazy values.
Fixes: 60877a32bce00 ("net: allow large number of tx queues")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/core/dev.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index aa82f9ab6a36..47239143b48e 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -6297,7 +6297,8 @@ static int netif_alloc_netdev_queues(struct net_device *dev) struct netdev_queue *tx; size_t sz = count * sizeof(*tx); - BUG_ON(count < 1 || count > 0xffff); + if (count < 1 || count > 0xffff) + return -EINVAL; tx = kzalloc(sz, GFP_KERNEL | __GFP_NOWARN | __GFP_REPEAT); if (!tx) { |