From 9ee81443b99ae3a022ba145ed62e22a5173e33f6 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Thu, 4 Jun 2015 11:59:34 +0300 Subject: [PATCH] staging: wilc1000: prevent some overflows in debugfs Add some limits here so we don't corrupt memory. Signed-off-by: Dan Carpenter Signed-off-by: Greg Kroah-Hartman --- drivers/staging/wilc1000/wilc_debugfs.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/staging/wilc1000/wilc_debugfs.c b/drivers/staging/wilc1000/wilc_debugfs.c index 74b9fd5ba27b..c328208cda29 100644 --- a/drivers/staging/wilc1000/wilc_debugfs.c +++ b/drivers/staging/wilc1000/wilc_debugfs.c @@ -53,6 +53,9 @@ static ssize_t wilc_debug_level_write(struct file *filp, const char *buf, size_t char buffer[128] = {}; int flag = 0; + if (count > sizeof(buffer)) + return -EINVAL; + if (copy_from_user(buffer, buf, count)) { return -EFAULT; } @@ -99,6 +102,9 @@ static ssize_t wilc_debug_region_write(struct file *filp, const char *buf, size_ char buffer[128] = {}; int flag; + if (count > sizeof(buffer)) + return -EINVAL; + if (copy_from_user(buffer, buf, count)) { return -EFAULT; } -- 2.30.2