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authorKees Cook <kees.cook@canonical.com>2010-10-07 10:03:48 +0000
committerDavid S. Miller <davem@davemloft.net>2010-10-08 10:48:28 -0700
commitae6df5f96a51818d6376da5307d773baeece4014 (patch)
treee696e82cc5a4df37f0d2d3fa25045a79646a0cce /net
parent94b105723a3bfca45c75916423cd959ce71ed215 (diff)
net: clear heap allocation for ETHTOOL_GRXCLSRLALL
Calling ETHTOOL_GRXCLSRLALL with a large rule_cnt will allocate kernel heap without clearing it. For the one driver (niu) that implements it, it will leave the unused portion of heap unchanged and copy the full contents back to userspace. Signed-off-by: Kees Cook <kees.cook@canonical.com> Acked-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/ethtool.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 7a85367b3c2f..4016ac6bdd5e 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -348,7 +348,7 @@ static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
if (info.cmd == ETHTOOL_GRXCLSRLALL) {
if (info.rule_cnt > 0) {
if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
- rule_buf = kmalloc(info.rule_cnt * sizeof(u32),
+ rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
GFP_USER);
if (!rule_buf)
return -ENOMEM;

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