Segfault in libGL when OpenGL and Vulkan calls are interleaved

Graphics / Linux Linux
1

It appears with certain combination of GL/Vulkan calls it is possible to make libGL segfault. Initially found when investigating issue in recent Hitman update:

Attached minimal reproducer (assumes presence of SDL2 and Vulkan) and nvidia-bug-report output.

output in dmesg upon segfault:

[10191.383917] NVRM: Xid (PCI:0000:01:00): 31, Ch 00000018, engmask 00000111, intr 10000000

gdb stacktrace:

Program received signal SIGSEGV, Segmentation fault.
0x00007fffe9beb460 in ?? ()
(gdb) bt
#0  0x00007fffe9beb460 in ?? ()
#1  0x00007fffec490619 in ?? () from /usr/lib64/nvidia/libGL.so.1
#2  0x00007fffec48aab9 in ?? () from /usr/lib64/nvidia/libGL.so.1
#3  0x00007fffec483ca6 in glXGetProcAddress () from /usr/lib64/nvidia/libGL.so.1
#4  0x00007ffff7b7f3e6 in X11_GL_LoadLibrary (_this=0x60d420, path=<optimized out>) at /usr/src/debug/SDL2-2.0.5/src/video/x11/SDL_x11opengl.c:193
#5  0x00007ffff7b6f836 in SDL_GL_LoadLibrary_REAL (path=path@entry=0x0) at /usr/src/debug/SDL2-2.0.5/src/video/SDL_video.c:2729
#6  0x00007ffff7b71779 in SDL_CreateWindow_REAL (title=0x4008b4 "", x=<optimized out>, y=0, w=1, h=1, flags=26) at /usr/src/debug/SDL2-2.0.5/src/video/SDL_video.c:1371
#7  0x0000000000400827 in main (argc=1, argv=0x7fffffffd268) at reproducer.c:11

reproducer.c (328 Bytes)
Makefile.txt (180 Bytes)

2

As pointed out by Feral Interactive support it was caused by incorrect library path in vulkan icd file (distribution without glvnd enabled libGL).

3

Please test with 384.47 driver . https://devtalk.nvidia.com/default/topic/1016125