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drm/amdkfd: fix amdkfd use-after-free GP fault

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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>
This commit is contained in:
Randy Dunlap 2017-11-13 18:08:48 +02:00 committed by Oded Gabbay
parent 8c946b8988
commit c393e9b2d5
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdkfd/kfd_module.c
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@ -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);