File 0050-jazz_led-fix-bad-snprintf.patch of Package qemu.9577

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File 0050-jazz_led-fix-bad-snprintf.patch of Package qemu.9577

From f1d6a8d1a1ea0300ba434560e62af4e201d46389 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Wed, 3 May 2017 12:44:41 +0200
Subject: [PATCH] jazz_led: fix bad snprintf

Detected by GCC 7's -Wformat-truncation.  snprintf writes at most
2 bytes here including the terminating NUL, so the result is
truncated.  In addition, the newline at the end is pointless.
Fix the buffer size and the format string.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(cherry picked from commit e9c6ab62c760e333a6cf0f3f9ab021633723434c)
[LY: BSC#1040228]
Signed-off-by: Liang Yan <lyan@suse.com>
---
 hw/display/jazz_led.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/display/jazz_led.c b/hw/display/jazz_led.c
index b72fdb1717..3c97d56434 100644
--- a/hw/display/jazz_led.c
+++ b/hw/display/jazz_led.c
@@ -227,13 +227,13 @@ static void jazz_led_invalidate_display(void *opaque)
 static void jazz_led_text_update(void *opaque, console_ch_t *chardata)
 {
     LedState *s = opaque;
-    char buf[2];
+    char buf[3];
 
     dpy_text_cursor(s->con, -1, -1);
     qemu_console_resize(s->con, 2, 1);
 
     /* TODO: draw the segments */
-    snprintf(buf, 2, "%02hhx\n", s->segments);
+    snprintf(buf, 3, "%02hhx", s->segments);
     console_write_ch(chardata++, ATTR2CHTYPE(buf[0], QEMU_COLOR_BLUE,
                                              QEMU_COLOR_BLACK, 1));
     console_write_ch(chardata++, ATTR2CHTYPE(buf[1], QEMU_COLOR_BLUE,

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File 0050-jazz_led-fix-bad-snprintf.patch of Package qemu.9577

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