xrdp启动Xorg时会出来个空指针崩掉

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主题:xrdp启动Xorg时会出来个空指针崩掉
楼主|z16166|2023-01-30 00:55:39|只看此ID
UOS上。这个调用栈里的函数名应该不是很准。
搜了一下，(OsLookupColor+0x139)这个很多（好多和显卡有关的），但是别的很少。
不知道哪位大佬有经验

happy@happy:~$ sudo lspci | grep VGA
01:00.0 VGA compatible controller: NVIDIA Corporation GM204 [GeForce GTX 970] (rev a1)

happy@happy:~$ cat ~/.xorgxrdp.10.log
[  4208.023]
X.Org X Server 1.20.4
X Protocol Version 11, Revision 0
[  4208.023] Build Operating System: Linux 4.19.0-server-amd64 x86_64 Uos
[  4208.023] Current Operating System: Linux happy 5.10.0-amd64-desktop #20.00.52.02-release SMP Wed Jun 8 17:30:51 CST 2022 x86_64
[  4208.023] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.10.0-amd64-desktop root=UUID=108E0870108E0870 loop=/UOS/root.disk ro splash quiet loglevel=3 ima_appraise=off libahci.ignore_sss=1
[  4208.023] Build Date: 03 November 2022  06:21:05AM
[  4208.023] xorg-server 2:1.20.4.30-1+dde (https://www.debian.org/support)
[  4208.023] Current version of pixman: 0.36.0
[  4208.023]    Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
[  4208.023] Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[  4208.023] (++) Log file: ".xorgxrdp.10.log", Time: Sun Jan 29 23:01:19 2023
[  4208.023] (++) Using config file: "/etc/X11/xrdp/xorg.conf"
[  4208.023] (==) Using config directory: "/etc/X11/xorg.conf.d"
[  4208.023] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[  4208.023] (==) ServerLayout "X11 Server"
[  4208.023] (**) |-->Screen "Screen (xrdpdev)" (0)
[  4208.023] (**) |   |-->Monitor "Monitor"
[  4208.024] (**) |   |-->Device "Video Card (xrdpdev)"
[  4208.024] (EE)
[  4208.024] (EE) Backtrace:
[  4208.024] (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x139) [0x59d619]
[  4208.024] (EE) 1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x50) [0x7efd2e18d77f]
[  4208.024] (EE) 2: /usr/lib/xorg/Xorg (xf86GetEntityPrivate+0xa6b) [0x47247b]
[  4208.024] (EE) 3: /usr/lib/xorg/Xorg (xf86GetEntityPrivate+0x120e) [0x4734fe]
[  4208.024] (EE) 4: /usr/lib/xorg/Xorg (xf86DRI2Enabled+0x1a98) [0x474a98]
[  4208.024] (EE) 5: /usr/lib/xorg/Xorg (InitOutput+0xe31) [0x47eea1]
[  4208.025] (EE) 6: /usr/lib/xorg/Xorg (InitFonts+0x1cf) [0x44181f]
[  4208.025] (EE) 7: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xeb) [0x7efd2dfdc09b]
[  4208.025] (EE) 8: /usr/lib/xorg/Xorg (_start+0x2a) [0x42b6ba]
[  4208.025] (EE)
[  4208.025] (EE) Segmentation fault at address 0x0
[  4208.025] (EE)
Fatal server error:
[  4208.025] (EE) Caught signal 11 (Segmentation fault). Server aborting
[  4208.025] (EE)
[  4208.025] (EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
for help.
[  4208.025] (EE) Please also check the log file at ".xorgxrdp.10.log" for additional information.
[  4208.025] (EE)
[  4208.025] (EE) Server terminated with error (1). Closing log file.
--
修改:z16166 FROM 114.241.225.*
FROM 114.241.225.*
1楼|z16166|2023-01-30 15:17:23|只看此ID
编辑：

已经解决。用下面的代码重新编译一个Xorg出来完事。
https://github.com/linuxdeepin/xorg-server
这个版本无空指针问题，但是它的默认modules路径是/usr/local/lib/xorg/modules，而UOS自带的Xorg的默认modules路径是/usr/lib/xorg/modules，要在二者之间设一个符号链接就行。

---------------------------------------------------------------------------

调用configDisplay()时传递的第二个参数是个空指针，找不到配套的代码

这个代码不匹配，传给configDisplay()时检查了指针非空
https://github.com/linuxdeepin/xorg-server/blob/v20/1.20.4/hw/xfree86/common/xf86Config.c

(gdb) p $rip
$2 = (void (*)()) 0x471c5b <configScreen+587>

#0  0x0000000000471c5b in configDisplay (conf_display=0x25c9a80, displayp=0x0) at ../../../../../../hw/xfree86/common/xf86Config.c:2034
#1  configScreen (screenp=0x25bbbd0, conf_screen=0x25c9950, scrnum=<optimized out>, from=from@entry=X_CONFIG, auto_gpu_device=<optimized out>)
    at ../../../../../../hw/xfree86/common/xf86Config.c:1816
#2  0x00000000004723fe in configLayout (conf_layout=conf_layout@entry=0x25c1b30, default_layout=default_layout@entry=0x25aaa00 "X11 Server", servlayoutp=<optimized out>)
    at ../../../../../../hw/xfree86/common/xf86Config.c:1457
#3  0x0000000000474a88 in xf86HandleConfigFile (autoconfig=autoconfig@entry=0) at ../../../../../../hw/xfree86/common/xf86Config.c:2415
#4  0x000000000047eea1 in InitOutput (pScreenInfo=pScreenInfo@entry=0x655800 <screenInfo>, argc=argc@entry=11, argv=argv@entry=0x7fffdbdc07a8)
    at ../../../../../../hw/xfree86/common/xf86Init.c:371
#5  0x00000000004417df in dix_main (argc=11, argv=0x7fffdbdc07a8, envp=<optimized out>) at ../../../../dix/main.c:193
#6  0x00007f7d3ba8909b in __libc_start_main (main=0x42b680 <main>, argc=11, argv=0x7fffdbdc07a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>,
    stack_end=0x7fffdbdc0798) at ../csu/libc-start.c:308
#7  0x000000000042b6ba in _start ()

/usr/lib/xorg/Xorg :10 -auth .Xauthority -config xrdp/xorg.conf -noreset -nolisten tcp -logfile .xorgxrdp.%s.log
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修改:z16166 FROM 114.241.225.*
FROM 114.241.225.*