Bug#1000887: [Bug#1000887] xorg: X server segfaults when using xpdf
Hi,
I used a remote ssh session to attach the Xorg process in gdb.
Judging by entry #1 of the stack trace, it might be a stack corruption.
Here's the session log:
GNU gdb (Debian 10.1-2) 10.1.90.20210103-git
Copyright (C) 2021 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/lib/xorg/Xorg...
(No debugging symbols found in /usr/lib/xorg/Xorg)
[?2004h(gdb) attach 3158
[?2004l
Attaching to program: /usr/lib/xorg/Xorg, process 3158
[New LWP 3160]
[New LWP 3161]
[New LWP 3164]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f1adb4cdc96 in epoll_wait (epfd=4, events=0x7ffc2ba7bdd0, maxevents=256, timeout=275496) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
30 ../sysdeps/unix/sysv/linux/epoll_wait.c: No such file or directory.
[?2004h[?2004l
[?2004h(gdb) c
[?2004l
Continuing.
Thread 1 "Xorg" received signal SIGSEGV, Segmentation fault.
0x00007f1accd8a03a in ?? ()
[?2004h[?2004l
[?2004h(gdb) info stack
[?2004l
#0 0x00007f1accd8a03a in ?? ()
#1 0x0000000000000001 in ?? ()
#2 0x0000559ee4a86ab0 in ?? ()
#3 0x00007f1ad9752ec8 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4 0x00007f1ad9754754 in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5 0x00007f1ad96f857f in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#6 0x00007f1ad9318f8a in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#7 0x00007f1ace8f5af0 in ?? () from /usr/lib/xorg/modules/libglamoregl.so
#8 0x00007f1ace8f6370 in ?? () from /usr/lib/xorg/modules/libglamoregl.so
#9 0x00007f1ace8f8f30 in ?? () from /usr/lib/xorg/modules/libglamoregl.so
#10 0x0000559ee3522ed7 in ?? ()
#11 0x0000559ee343958f in ?? ()
#12 0x0000559ee343d41e in ?? ()
#13 0x0000559ee3441395 in ?? ()
#14 0x00007f1adb3f7e4a in __libc_start_main (main=0x559ee342aba0, argc=6, argv=0x7ffc2ba7cc08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc2ba7cbf8)
at ../csu/libc-start.c:314
#15 0x0000559ee342abda in _start ()
[?2004h(gdb) quit
[?2004l
[?2004hA debugging session is active.
Inferior 1 [process 3158] will be detached.
Quit anyway? (y or n) y
[?2004l
Detaching from program: /usr/lib/xorg/Xorg, process 3158
[Inferior 1 (process 3158) detached]
All the best,
Dave
Reply to: