[4.14,10/17] ARM: 8810/1: vfp: Fix wrong assignement to ufp_exc

Message ID 20190110175150.5239-11-dave.long@linaro.org
State Superseded
Headers show
Series
  • V4.14 backport of more 32-bit arm spectre patches
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Commit Message

David Long Jan. 10, 2019, 5:51 p.m.
From: Julien Thierry <julien.thierry@arm.com>


Commit 5df7a99bdd0de4a0480320264c44c04543c29d5a upstream.

In vfp_preserve_user_clear_hwstate, ufp_exc->fpinst2 gets assigned to
itself. It should actually be hwstate->fpinst2 that gets assigned to the
ufp_exc field.

Fixes commit 3aa2df6ec2ca6bc143a65351cca4266d03a8bc41 ("ARM: 8791/1:
vfp: use __copy_to_user() when saving VFP state").

Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Julien Thierry <julien.thierry@arm.com>

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

Signed-off-by: David A. Long <dave.long@linaro.org>

---
 arch/arm/vfp/vfpmodule.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.17.1

Patch

diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 6bacd69c9e81..8e11223d32a1 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -579,7 +579,7 @@  int vfp_preserve_user_clear_hwstate(struct user_vfp *ufp,
 	 */
 	ufp_exc->fpexc = hwstate->fpexc;
 	ufp_exc->fpinst = hwstate->fpinst;
-	ufp_exc->fpinst2 = ufp_exc->fpinst2;
+	ufp_exc->fpinst2 = hwstate->fpinst2;
 
 	/* Ensure that VFP is disabled. */
 	vfp_flush_hwstate(thread);