This is a note to let you know that I've just added the patch titled
libertas: potential oops in debugfs
to the 3.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
libertas-potential-oops-in-debugfs.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a497e47d4aec37aaf8f13509f3ef3d1f6a717d88 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Wed, 30 Oct 2013 20:12:51 +0300
Subject: libertas: potential oops in debugfs
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
commit a497e47d4aec37aaf8f13509f3ef3d1f6a717d88 upstream.
If we do a zero size allocation then it will oops. Also we can't be
sure the user passes us a NUL terminated string so I've added a
terminator.
This code can only be triggered by root.
Reported-by: Nico Golde <nico@xxxxxxxxx>
Reported-by: Fabian Yamaguchi <fabs@xxxxxxxxx>
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Dan Williams <dcbw@xxxxxxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/libertas/debugfs.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/net/wireless/libertas/debugfs.c
+++ b/drivers/net/wireless/libertas/debugfs.c
@@ -913,7 +913,10 @@ static ssize_t lbs_debugfs_write(struct
char *p2;
struct debug_data *d = f->private_data;
- pdata = kmalloc(cnt, GFP_KERNEL);
+ if (cnt == 0)
+ return 0;
+
+ pdata = kmalloc(cnt + 1, GFP_KERNEL);
if (pdata == NULL)
return 0;
@@ -922,6 +925,7 @@ static ssize_t lbs_debugfs_write(struct
kfree(pdata);
return 0;
}
+ pdata[cnt] = '\0';
p0 = pdata;
for (i = 0; i < num_of_items; i++) {
Patches currently in stable-queue which might be from dan.carpenter@xxxxxxxxxx are
queue-3.12/libertas-potential-oops-in-debugfs.patch
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