[ARM32,v4.4,V2,38/47] ARM: 8810/1: vfp: Fix wrong assignement to ufp_exc
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Message ID 17ef1620483a77f70c7c27e64cba3ad1684626c7.1564646727.git.viresh.kumar@linaro.org
State New
Headers show
  • V4.4 backport of arm32 Spectre patches
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Commit Message

Viresh Kumar Aug. 1, 2019, 8:16 a.m. UTC
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: Viresh Kumar <viresh.kumar@linaro.org>
 arch/arm/vfp/vfpmodule.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index f07567eedd82..f9392fb060ea 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -583,7 +583,7 @@  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. */