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ARM: 8658/1: uaccess: fix zeroing of 64-bit get_user()

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commit 9e3440481845b2ec22508f60837ee2cab2b6054f upstream.

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>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kees Cook 2017-02-16 01:44:37 +01:00 committed by Greg Kroah-Hartman
parent 808de347eb
commit 17c4434214
1 changed files with 1 additions and 1 deletions
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arch/arm/lib/getuser.S
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@ -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]