From 7f70f194ae135bd1e856c2dc811b8fa4a56296ea Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Timo=20Ter=C3=A4s?= Date: Thu, 20 Sep 2012 09:41:56 +0300 Subject: [PATCH] fbsplash: use virtual y size in mmap size calculations MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The virtual y can be larger - and we can be even writing there since we are taking into account the y offset. Avoids possible crash. Signed-off-by: Timo Teräs --- miscutils/fbsplash.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/miscutils/fbsplash.c b/miscutils/fbsplash.c index 7b695b2..58e491d 100644 --- a/miscutils/fbsplash.c +++ b/miscutils/fbsplash.c @@ -150,7 +150,7 @@ static void fb_open(const char *strfb_device) // map the device in memory G.addr = mmap(NULL, - G.scr_var.yres * G.scr_fix.line_length, + G.scr_var.yres_virtual * G.scr_fix.line_length, PROT_WRITE, MAP_SHARED, fbfd, 0); if (G.addr == MAP_FAILED) bb_perror_msg_and_die("mmap"); -- 2.1.3