Patch-mainline: v5.19-rc4
Git-commit: ecb6237fa397b7b810d798ad19322eca466dbab1
References: git-fixes
From: Julien Grall <jgrall@amazon.com>
Date: Fri, 17 Jun 2022 11:30:37 +0100
Subject: [PATCH] x86/xen: Remove undefined behavior in setup_features()
1 << 31 is undefined. So switch to 1U << 31.
Fixes: 5ead97c84fa7 ("xen: Core Xen implementation")
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20220617103037.57828-1-julien@xen.org
Signed-off-by: Juergen Gross <jgross@suse.com>
---
drivers/xen/features.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/xen/features.c b/drivers/xen/features.c
index 7b591443833c..87f1828d40d5 100644
--- a/drivers/xen/features.c
+++ b/drivers/xen/features.c
@@ -42,6 +42,6 @@ void xen_setup_features(void)
if (HYPERVISOR_xen_version(XENVER_get_features, &fi) < 0)
break;
for (j = 0; j < 32; j++)
- xen_features[i * 32 + j] = !!(fi.submap & 1<<j);
+ xen_features[i * 32 + j] = !!(fi.submap & 1U << j);
}
}
--
2.35.3