commit 397f4ebf4f317b1d5ecd678a8559a5cb5c6975c3
author Jeff Garzik <jeff@garzik.org> Tue Oct 03 01:13:52 2006 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> Tue Oct 03 08:03:41 2006 -0700
tree d42ed51b81aaf84016c24af48ad9f4c277da8fac
parent c3b6571384024be31e8b3442c0e7c3b127110d9b

[PATCH] ipmi: fix uninitialized data bug

gcc issues the following warning:

drivers/char/ipmi/ipmi_si_intf.c: In function ‘init_ipmi_si’:
drivers/char/ipmi/ipmi_si_intf.c:1729: warning: ‘data.irq’ may be used uninitialized in this function

This is indeed a bug.  data.irq is completely uninitialized in some code
paths.  Worse than that, data from a previous decode_dmi() run can easily
leak through successive calls.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Acked-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/char/ipmi/ipmi_si_intf.c

diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 908521e..ad9ea06 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -1734,6 +1734,7 @@
 	int                  rv;
 
 	while ((dev = dmi_find_device(DMI_DEV_TYPE_IPMI, NULL, dev))) {
+		memset(&data, 0, sizeof(data));
 		rv = decode_dmi((struct dmi_header *) dev->device_data, &data);
 		if (!rv)
 			try_init_dmi(&data);