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| Started by | Kees Cook <keescook@chromium.org> |
|---|---|
| First post | 2017-02-16 01:40 +0100 |
| Last post | 2017-02-16 01:40 +0100 |
| Articles | 1 — 1 participant |
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[PATCH] ARM: uaccess: fix zeroing of 64-bit get_user() Kees Cook <keescook@chromium.org> - 2017-02-16 01:40 +0100
| From | Kees Cook <keescook@chromium.org> |
|---|---|
| Date | 2017-02-16 01:40 +0100 |
| Subject | [PATCH] ARM: uaccess: fix zeroing of 64-bit get_user() |
| Message-ID | <tbih5-768-55@gated-at.bofh.it> |
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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