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authorLothar Waßmann <LW@KARO-electronics.de>2012-11-22 13:11:25 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-11-27 02:59:00 +0400
commit98c35534420d3147553bd3071a5fc63cd56de5b1 (patch)
treecf24357c739a1b9d1bc6a2ca0108c6c9a9c1bee5 /drivers/usb
parent9db72fe6c943852032d9ed863c87e8c02d3cb9da (diff)
downloadlinux-98c35534420d3147553bd3071a5fc63cd56de5b1.tar.xz
USB: chipidea: fix use after free bug
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 <LW@KARO-electronics.de> Cc: stable <stable@vger.kernel.org> # 3.6 Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/chipidea/core.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 5a4a5eca4194..aebf695a9344 100644
--- 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);