1 From 606349860d27492c328752dca5a3784c0e9a6d24 Mon Sep 17 00:00:00 2001
2 From: Khem Raj <raj.khem@gmail.com>
3 Date: Sat, 27 Feb 2021 11:05:45 -0800
4 Subject: [PATCH i-g-t] lib/igt_edid: Allocate raw 8-bytes for VSDB
6 hdmi_vsdb is an element of cea_vsdb which makes the size of cea_vsdb to
7 be 8 ( 3bytes ieee_oui ) + ( 5bytes hdmi_vsdb struct), its true that we
8 only use 7 bytes technically we can only allocate 7byte array but since
9 we are writing to elements of hdmi_vsdb struct which is sitting at offet
10 4-8 in cea_vsdb, compiler thinks we have an element which is out of
11 array bounds since out allocated size is 7bytes
14 ../git/lib/igt_edid.c:365:13: error: array subscript 'struct hdmi_vsdb[0]' is partly outside array bounds of 'char[7]' [-Werror=array-bounds]
15 365 | hdmi->src_phy_addr[0] = 0x10;
18 allocating one extra byte matches with size of cea_vsdb and compiler is
21 Upstream-Status: Submitted [https://lists.freedesktop.org/archives/igt-dev/2021-February/029446.html]
22 Signed-off-by: Khem Raj <raj.khem@gmail.com>
25 1 file changed, 1 insertion(+), 1 deletion(-)
27 diff --git a/lib/igt_edid.c b/lib/igt_edid.c
28 index 1c85486d..ce09cc47 100644
31 @@ -351,7 +351,7 @@ void cea_sad_init_pcm(struct cea_sad *sad, int channels,
32 const struct cea_vsdb *cea_vsdb_get_hdmi_default(size_t *size)
34 /* We'll generate a VSDB with 2 extension fields. */
35 - static char raw[CEA_VSDB_HDMI_MIN_SIZE + 2] = {0};
36 + static char raw[CEA_VSDB_HDMI_MIN_SIZE + 3] = {0};
37 struct cea_vsdb *vsdb;
38 struct hdmi_vsdb *hdmi;
