* [PATCH] ARM: uaccess: fix zeroing of 64-bit get_user()
@ 2017-02-16 0:36 Kees Cook
0 siblings, 0 replies; only message in thread
From: Kees Cook @ 2017-02-16 0:36 UTC (permalink / raw)
To: linux-arm-kernel
The 64-bit get_user() wasn't clearing the high word due to a typo in the
error handler. The exception handler entry was already correct, though.
Noticed during recent usercopy test additions in lib/test_user_copy.c.
Signed-off-by: Kees Cook <keescook@chromium.org>
---
arch/arm/lib/getuser.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/lib/getuser.S b/arch/arm/lib/getuser.S
index 8ecfd15c3a02..df73914e81c8 100644
--- a/arch/arm/lib/getuser.S
+++ b/arch/arm/lib/getuser.S
@@ -67,7 +67,7 @@ ENTRY(__get_user_4)
ENDPROC(__get_user_4)
ENTRY(__get_user_8)
- check_uaccess r0, 8, r1, r2, __get_user_bad
+ check_uaccess r0, 8, r1, r2, __get_user_bad8
#ifdef CONFIG_THUMB2_KERNEL
5: TUSER(ldr) r2, [r0]
6: TUSER(ldr) r3, [r0, #4]
--
2.7.4
--
Kees Cook
Pixel Security
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