linux-kernel - [PATCH 4.4 076/342] drivers: android: correct the size of struct binder_uintptr_t for BC_DEAD_BINDER

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Message-Id: <20160301234530.454771775@linuxfoundation.org>
Date:	Tue, 01 Mar 2016 23:54:09 +0000
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	<linux-kernel@...r.kernel.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<stable@...r.kernel.org>, Lisa Du <cldu@...vell.com>,
	Nicolas Boichat <drinkcat@...omium.org>,
	Olof Johansson <olof@...om.net>
Subject: [PATCH 4.4 076/342] drivers: android: correct the size of struct binder_uintptr_t for BC_DEAD_BINDER_DONE

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lisa Du <cldu@...vell.com>

commit 7a64cd887fdb97f074c3fda03bee0bfb9faceac3 upstream.

There's one point was missed in the patch commit da49889deb34 ("staging:
binder: Support concurrent 32 bit and 64 bit processes."). When configure
BINDER_IPC_32BIT, the size of binder_uintptr_t was 32bits, but size of
void * is 64bit on 64bit system. Correct it here.

Signed-off-by: Lisa Du <cldu@...vell.com>
Signed-off-by: Nicolas Boichat <drinkcat@...omium.org>
Fixes: da49889deb34 ("staging: binder: Support concurrent 32 bit and 64 bit processes.")
Acked-by: Olof Johansson <olof@...om.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/android/binder.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -2074,7 +2074,7 @@ static int binder_thread_write(struct bi
 			if (get_user(cookie, (binder_uintptr_t __user *)ptr))
 				return -EFAULT;
 
-			ptr += sizeof(void *);
+			ptr += sizeof(cookie);
 			list_for_each_entry(w, &proc->delivered_death, entry) {
 				struct binder_ref_death *tmp_death = container_of(w, struct binder_ref_death, work);