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usb : dwc3: Initialize kernel stack variables properly

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If kernel stack variables are not initialized properly,
there  is a chance of kernel information disclosure.
So, initialize kernel stack variables with null characters.

CRs-fixed: 2042592
Change-Id: I213c0e5c7f67824c2cecace276ff2f8f81599d51
Signed-off-by: Sai Krishna Juturi <jsaikrishna@codeaurora.org>
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
This commit is contained in:
Sai Krishna Juturi 2017-05-17 11:06:35 +05:30 committed by Gerrit - the friendly Code Review server
parent be60ad582c
commit 77094dbb1f
1 changed files with 3 additions and 3 deletions
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6
drivers/usb/dwc3/debugfs.c
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@ -320,7 +320,7 @@ static ssize_t dwc3_mode_write(struct file *file,
struct seq_file *s = file->private_data;
struct dwc3 *dwc = s->private;
u32 mode = 0;
char buf[32];
char buf[32] = {};
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
@ -397,7 +397,7 @@ static ssize_t dwc3_testmode_write(struct file *file,
struct dwc3 *dwc = s->private;
unsigned long flags;
u32 testmode = 0;
char buf[32];
char buf[32] = {};
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
@ -459,7 +459,7 @@ static ssize_t dwc3_link_state_write(struct file *file,
struct dwc3 *dwc = s->private;
unsigned long flags;
enum dwc3_link_state state = 0;
char buf[32];
char buf[32] = {};
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;