Diagnose 224 stores 4k bytes, which cannot be deduced from the inline
assembly constraints. This leads to KMSAN false positives.
Unpoison the output buffer manually with kmsan_unpoison_memory().
Signed-off-by: Ilya Leoshkevich <i...@linux.ibm.com>
---
arch/s390/kernel/diag.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/s390/kernel/diag.c b/arch/s390/kernel/diag.c
index 92fdc35f028c..fb83a21014d0 100644
--- a/arch/s390/kernel/diag.c
+++ b/arch/s390/kernel/diag.c
@@ -9,6 +9,7 @@
#include <linux/export.h>
#include <linux/init.h>
#include <linux/cpu.h>
+#include <linux/kmsan-checks.h>
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/vmalloc.h>
@@ -255,6 +256,7 @@ int diag224(void *ptr)
"1:\n"
EX_TABLE(0b,1b)
: "+d" (rc) :"d" (0), "d" (addr) : "memory");
+ kmsan_unpoison_memory(ptr, PAGE_SIZE);
return rc;
}
EXPORT_SYMBOL(diag224);
--
2.43.0
