3.7-stable review patch. If anyone has any objections, please let me know.
------------------
From: Lothar Waßmann <l...@karo-electronics.de>
commit 98c35534420d3147553bd3071a5fc63cd56de5b1 upstream.
The pointer to a platform_device struct must not be dereferenced after
the device has been unregistered.
This bug produces a crash when unloading the ci13xxx kernel module
compiled with CONFIG_PAGE_POISONING enabled.
Signed-off-by: Lothar Waßmann <l...@karo-electronics.de>
Acked-by: Alexander Shishkin <alexander.shish...@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/usb/chipidea/core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -385,8 +385,9 @@ EXPORT_SYMBOL_GPL(ci13xxx_add_device);
void ci13xxx_remove_device(struct platform_device *pdev)
{
+ int id = pdev->id;
platform_device_unregister(pdev);
- ida_simple_remove(&ci_ida, pdev->id);
+ ida_simple_remove(&ci_ida, id);
}
EXPORT_SYMBOL_GPL(ci13xxx_remove_device);
--
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