hexdump: don't print bytes with bit 7 set

As Herbert Xu pointed out, bytes (chars) with bit 7 (0x80) set are true
with isprint() but they may not be isascii() but be Unicode instead, so
don't try to print them in hex dumps.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/hexdump.c b/lib/hexdump.c
index bd5edaeaa80b..343546550dc9 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -106,7 +106,8 @@ void hex_dump_to_buffer(const void *buf, size_t len, int rowsize,
         while (lx < (linebuflen - 1) && lx < (ascii_column - 1))
                 linebuf[lx++] = ' ';
         for (j = 0; (j < rowsize) && (j < len) && (lx + 2) < linebuflen; j++)
-                linebuf[lx++] = isprint(ptr[j]) ? ptr[j] : '.';
+                linebuf[lx++] = (isascii(ptr[j]) && isprint(ptr[j])) ? ptr[j]
+                                : '.';
 nil:
         linebuf[lx++] = '\0';
 }