Am Montag, 7. Oktober 2019, 10:55:01 CEST schrieb Hans de Goede:
Hi Hans,
The purgatory code now uses the shared lib/crypto/sha256.c sha256
implementation. This needs memzero_explicit, implement this.
Reported-by: Arvind Sankar <nivedita@xxxxxxxxxxxx>
Fixes: 906a4bb97f5d ("crypto: sha256 - Use get/put_unaligned_be32 to get
input, memzero_explicit") Signed-off-by: Hans de Goede
<hdegoede@xxxxxxxxxx>
---
arch/x86/boot/compressed/string.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/boot/compressed/string.c
b/arch/x86/boot/compressed/string.c index 81fc1eaa3229..511332e279fe 100644
--- a/arch/x86/boot/compressed/string.c
+++ b/arch/x86/boot/compressed/string.c
@@ -50,6 +50,11 @@ void *memset(void *s, int c, size_t n)
return s;
}
+void memzero_explicit(void *s, size_t count)
+{
+ memset(s, 0, count);
May I ask how it is guaranteed that this memset is not optimized out by the
compiler, e.g. for stack variables?