tree 38a6da2e1995b3050e32947019b1166e380c1ec5
parent 87f76d3aafe5b5e0a1d6d857088a0263b35afa6b
author Bernhard Walle <bwalle@suse.de> 1169988422 +0100
committer Tony Luck <tony.luck@intel.com> 1170713204 -0800

[IA64] Fix NULL-pointer dereference in ia64_machine_kexec()

This patch fixes a NULL-pointer dereference in ia64_machine_kexec().

The variable ia64_kimage is set in machine_kexec_prepare() which is
called from sys_kexec_load(). If kdump wasn't configured before,
ia64_kimage is NULL.  machine_kdump_on_init() passes ia64_kimage() to
machine_kexec() which assumes a valid value.

The patch also adds a few sanity checks for the image to simplify
debugging of similar problems in future.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>