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-rw-r--r--mm/kasan/report.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index d269f2087faf..c5367089703c 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -164,14 +164,20 @@ static void print_shadow_for_address(const void *addr)
for (i = -SHADOW_ROWS_AROUND_ADDR; i <= SHADOW_ROWS_AROUND_ADDR; i++) {
const void *kaddr = kasan_shadow_to_mem(shadow_row);
char buffer[4 + (BITS_PER_LONG/8)*2];
+ char shadow_buf[SHADOW_BYTES_PER_ROW];
snprintf(buffer, sizeof(buffer),
(i == 0) ? ">%p: " : " %p: ", kaddr);
-
+ /*
+ * We should not pass a shadow pointer to generic
+ * function, because generic functions may try to
+ * access kasan mapping for the passed address.
+ */
kasan_disable_current();
+ memcpy(shadow_buf, shadow_row, SHADOW_BYTES_PER_ROW);
print_hex_dump(KERN_ERR, buffer,
DUMP_PREFIX_NONE, SHADOW_BYTES_PER_ROW, 1,
- shadow_row, SHADOW_BYTES_PER_ROW, 0);
+ shadow_buf, SHADOW_BYTES_PER_ROW, 0);
kasan_enable_current();
if (row_is_guilty(shadow_row, shadow))