4.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Joe Perches <joe@xxxxxxxxxxx> [ Upstream commit 077cb37fcf6f00a45f375161200b5ee0cd4e937b ] It seems that kernel memory can leak into userspace by a kmalloc, ethtool_get_strings, then copy_to_user sequence. Avoid this by using kcalloc to zero fill the copied buffer. Signed-off-by: Joe Perches <joe@xxxxxxxxxxx> Acked-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- net/core/ethtool.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -1284,7 +1284,7 @@ static int ethtool_get_strings(struct ne gstrings.len = ret; - data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER); + data = kcalloc(gstrings.len, ETH_GSTRING_LEN, GFP_USER); if (!data) return -ENOMEM; -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html