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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
parent94b105723a3bfca45c75916423cd959ce71ed215 (diff)
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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>
-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 7a85367..4016ac6 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;