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1 From e50c85f4ebf559a3bac4817b41074c43d4691779 Mon Sep 17 00:00:00 2001
2 From: Eric Anholt <eric@anholt.net>
3 Date: Fri, 26 Oct 2018 17:47:30 -0700
4 Subject: [PATCH] Fix segfault on probing a non-PCI platform device on a system
5  with PCI.
6
7 Some Broadcom set-top-box boards have PCI busses, but the GPU is still
8 probed through DT.  We would dereference a null busid here in that
9 case.
10
11 Signed-off-by: Eric Anholt <eric@anholt.net>
12
13 Upstream-Status: Backport [https://github.com/freedesktop/xorg-xserver/commit/e50c85f4e]
14 Signed-off-by: Aníbal Limón <anibal.limon@linaro.org>
15 ---
16  hw/xfree86/common/xf86platformBus.c | 2 +-
17  1 file changed, 1 insertion(+), 1 deletion(-)
18
19 diff --git a/hw/xfree86/common/xf86platformBus.c b/hw/xfree86/common/xf86platformBus.c
20 index cef47da03..dadbac6c8 100644
21 --- a/hw/xfree86/common/xf86platformBus.c
22 +++ b/hw/xfree86/common/xf86platformBus.c
23 @@ -289,7 +289,7 @@ xf86platformProbe(void)
24      for (i = 0; i < xf86_num_platform_devices; i++) {
25          char *busid = xf86_platform_odev_attributes(i)->busid;
26  
27 -        if (pci && (strncmp(busid, "pci:", 4) == 0)) {
28 +        if (pci && busid && (strncmp(busid, "pci:", 4) == 0)) {
29              platform_find_pci_info(&xf86_platform_devices[i], busid);
30          }
31  
32 -- 
33 2.28.0
34