Commit 7a2eab0d authored Dec 15, 2008 by Tony Breeds Committed by Paul Mackerras Dec 21, 2008

powerpc: Protect against NULL pointer deref in phyp-dump code



print_dump_header() will be called at least once with a NULL pointer in
a normal boot sequence.  If DEBUG is defined then we will dereference
the pointer and crash.  Add a quick fix to exit early in the NULL pointer
case.

Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Acked-by: Manish Ahuja <mahujam@gmail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

parent 8168b540

arch/powerpc/platforms/pseries/phyp_dump.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -130,6 +130,9 @@ static unsigned long init_dump_header(struct phyp_dump_header *ph)
		static void print_dump_header(const struct phyp_dump_header *ph)
		{
		#ifdef DEBUG
		if (ph == NULL)
		return;

		printk(KERN_INFO "dump header:\n");
		/* setup some ph->sections required */
		printk(KERN_INFO "version = %d\n", ph->version);