[Wayland-bugs] [Bug 94075] SIGSEGV in xkb_context_ref from /usr/lib/libxkbcommon.so.0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94075

Robert Folland <robert.folland at me.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 OS|All                         |Linux (All)
         Resolution|NOTABUG                     |---
           Hardware|x86 (IA32)                  |x86-64 (AMD64)
          Component|libinput                    |wayland
             Status|RESOLVED                    |REOPENED

--- Comment #3 from Robert Folland <robert.folland at me.com> ---
Hi,
I am still getting segfaults when initializing SDL on wayland. I avoided the
problem with a watchdog which would kill and restart my program in case of a
crash. But I would prefer to get it fixed.
I made a very simple example which calls SDL_Init and SDL_Quit with a pause in
between. Running this loop 100 times will result in a segmentation fault. I am
running weston/wayland on arch linux on an Intel NUC.

Here is the example program:

#include <stdlib.h>
#include <SDL2/SDL.h>
#include <unistd.h>
#include <iostream>

int main(int argc, char **argv)
{
    int count = atoi(argv[1]);

    for (int i = 0; i < count; i++) {
        std::cout << "Init " << i << std::endl;
        if (SDL_Init(SDL_INIT_VIDEO) < 0) {
            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
                         "Couldn't initialize SDL: %s\n",
                         SDL_GetError());
            return 1;
        }
        sleep(1);
        std::cout << "Quit" << std::endl;
        SDL_Quit();
        sleep(1);
    }
    return 0;
}

And here is a backtrace from running the program with gdb:


Init 70
Quit
Init 71
Quit
Init 72
Quit
Init 73
Quit
Init 74

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff1cfdcd3 in xkb_context_ref () from /usr/lib/libxkbcommon.so.0
(gdb) bt
#0  0x00007ffff1cfdcd3 in xkb_context_ref () from /usr/lib/libxkbcommon.so.0
#1  0x00007ffff1cffeb9 in ?? () from /usr/lib/libxkbcommon.so.0
#2  0x00007ffff1cff7fc in xkb_keymap_new_from_buffer ()
   from /usr/lib/libxkbcommon.so.0
#3  0x00007ffff710010e in ?? () from /usr/lib/libSDL2-2.0.so.0
#4  0x00007ffff23331f0 in ffi_call_unix64 () from /usr/lib/libffi.so.6
#5  0x00007ffff2332c58 in ffi_call () from /usr/lib/libffi.so.6
#6  0x00007ffff253ee5e in ?? () from /usr/lib/libwayland-client.so.0
#7  0x00007ffff253bc30 in ?? () from /usr/lib/libwayland-client.so.0
#8  0x00007ffff253ce1c in wl_display_dispatch_queue_pending ()
   from /usr/lib/libwayland-client.so.0
#9  0x00007ffff253d12f in wl_display_roundtrip_queue ()
   from /usr/lib/libwayland-client.so.0
#10 0x00007ffff7101160 in ?? () from /usr/lib/libSDL2-2.0.so.0
#11 0x00007ffff70ec589 in ?? () from /usr/lib/libSDL2-2.0.so.0
#12 0x00007ffff7050f47 in ?? () from /usr/lib/libSDL2-2.0.so.0
#13 0x0000000000400bde in main (argc=<optimized out>, argv=<optimized out>)
    at vplay-init.cpp:13
(gdb)

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