Bug#1115845: xserver-xorg-core crash in pci_device_vgaarb_set_target

[Bernhard Übelacker <bernhardu@mailbox.org>]

On Sat, 20 Sep 2025 14:21:06 +0300 axet@me.com wrote:> #0  0x00007f324d7b39b3 in pci_device_vgaarb_set_target (dev=0x557e1fc76310) at ../../src/common_vgaarb.c:235

> #10 0x00007f324d2b3df0 in <signal handler called> () at /lib/x86_64-linux-gnu/libc.so.6
> #11 0x00007f324d7b39b3 in pci_device_vgaarb_set_target (dev=0x557e1fc76310) at ../../src/common_vgaarb.c:235
> #12 0x0000557dfe29ea80 in xf86VGAarbiterLock (pScrn=<optimized out>) at ../../../../../../hw/xfree86/common/xf86VGAarbiter.c:92
> #13 xf86VGAarbiterLock (pScrn=pScrn@entry=0x557e1fc76310) at ../../../../../../hw/xfree86/common/xf86VGAarbiter.c:88
> #14 0x0000557dfe281bd8 in xf86DPMS (pScreen=<optimized out>, level=3) at ../../../../../../hw/xfree86/common/xf86DPMS.c:56
> #15 0x0000557dfe2f7616 in DPMSSet (client=<optimized out>, level=level@entry=3) at ../../../../Xext/dpms.c:106
> #16 0x0000557dfe3b7b74 in ScreenSaverTimeoutExpire (timer=<optimized out>, now=660381, arg=<optimized out>) at ../../../../os/WaitFor.c:446
> #17 0x0000557dfe3b7d55 in DoTimer (timer=0x557e2002f920, now=now@entry=660381) at ../../../../os/WaitFor.c:276
> #18 0x0000557dfe3b7fc8 in DoTimers (now=660381) at ../../../../os/WaitFor.c:290
> #19 check_timers () at ../../../../os/WaitFor.c:133
> #20 WaitForSomething (are_ready=<optimized out>) at ../../../../os/WaitFor.c:195
> #21 0x0000557dfe2419c7 in Dispatch () at ../../../../dix/dispatch.c:492
> #22 0x0000557dfe245cd4 in dix_main (argc=10, argv=<optimized out>, envp=<optimized out>) at ../../../../dix/main.c:274
> #23 0x00007f324d29dca8 in __libc_start_call_main (main=main@entry=0x557dfe22e610 <main>, argc=argc@entry=10, argv=argv@entry=0x7ffdfc2c32e8) at ../sysdeps/nptl/libc_start_call_main.h:58
> #24 0x00007f324d29dd65 in __libc_start_main_impl (main=0x557dfe22e610 <main>, argc=10, argv=0x7ffdfc2c32e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffdfc2c32d8) at ../csu/libc-start.c:360
> #25 0x0000557dfe22e641 in _start ()


Hello,
there is another recent Debian bug report
with the same call stack up to the first signal handler:

  https://bugs.debian.org/1114853

Kind regards,
Bernhard