From: Randy Dunlap <rdunlap@infradead.org>
Date: Mon, 13 Nov 2017 18:08:48 +0200
Subject: drm/amdkfd: fix amdkfd use-after-free GP fault
Git-commit: c393e9b2d51540b74e18e555df14706098dbf2cc
Patch-mainline: v4.15-rc2
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Fix GP fault caused by dev_info() reference to a struct device*
after the device has been freed (use after free).
kfd_chardev_exit() frees the device so 'kfd_device' should not
be used after calling kfd_chardev_exit().
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_module.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_module.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_module.c
@@ -24,6 +24,7 @@
#include <linux/sched.h>
#include <linux/moduleparam.h>
#include <linux/device.h>
+#include <linux/printk.h>
#include "kfd_priv.h"
#define KFD_DRIVER_AUTHOR "AMD Inc. and others"
@@ -132,7 +133,7 @@ static void __exit kfd_module_exit(void)
kfd_process_destroy_wq();
kfd_topology_shutdown();
kfd_chardev_exit();
- dev_info(kfd_device, "Removed module\n");
+ pr_info("amdkfd: Removed module\n");
}
module_init(kfd_module_init);