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any1 / wayvnc

A VNC server for wlroots based Wayland compositors
ISC License
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When i use the command wayvnc i get : free(): double free detected in tcache 2 [1] 11648 IOT instruction (core dumped) wayvnc #319

Open WdWdPckr opened 1 month ago

WdWdPckr commented 1 month ago

debuginfo.txt

Hello, I'm new to arch, using hyprland. I don't know what could cause a problem in my case as I don't know how to read the debugger information. I hope to use the issues function correctly. Thank you in advance for your attention.

**Result for command wayvnc -V :** 
wayvnc: v0.8.0-15d09b0 (makepkg)
neatvnc: v0.8.0-46432ce (makepkg)
aml: v0.3.0-0-gb83f357 (makepkg)
wayvnc -Ltrace | tee wayvnc-crash.log : 
wayvnc -Ltrace | tee wayvnc-crash.log
free(): double free detected in tcache 2
[1]    11366 IOT instruction (core dumped)  wayvnc -Ltrace |
       11367 done                           tee wayvnc-crash.log
**- Get the stack trace :**
Downloading separate debug info for system-supplied DSO at 0x772b0f35c000
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Core was generated by `wayvnc -Ltrace'.
Program terminated with signal SIGABRT, Aborted.
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6,
    no_tid=no_tid@entry=0) at pthread_kill.c:44
44            return INTERNAL_SYSCALL_ERROR_P (ret) ? INTERNAL_SYSCALL_ERRNO (ret) : 0;
**result for : bt full :** 

#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6,
    no_tid=no_tid@entry=0) at pthread_kill.c:44
        tid = <optimized out>
        ret = 0
        pd = <optimized out>
        old_mask = {__val = {0}}
        ret = <optimized out>
#1  0x0000772b0ef79463 in __pthread_kill_internal (threadid=<optimized out>, signo=6)
    at pthread_kill.c:78
No locals.
#2  0x0000772b0ef20120 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
        ret = <optimized out>
#3  0x0000772b0ef074c3 in __GI_abort () at abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x20, sa_sigaction = 0x20},
          sa_mask = {__val = {0, 0, 0, 0, 0, 0, 131026818462773, 0, 255, 0,
              108159197850528, 0, 131026819787456, 255, 131026818944850, 0}},
          sa_flags = 2125260544, sa_restorer = 0x7ffde7d33310}
#4  0x0000772b0ef08354 in __libc_message_impl (fmt=fmt@entry=0x772b0f0962f5 "%s\n")
    at ../sysdeps/posix/libc_fatal.c:132
        ap = {{gp_offset = 16, fp_offset = 30507,
            overflow_arg_area = 0x7ffde7d33420, reg_save_area = 0x7ffde7d333b0}}
        fd = 2
        iov = {{iov_base = 0x772b0f099628, iov_len = 40}, {
            iov_base = 0x772b0f0962f7, iov_len = 1}, {iov_base = 0xea,
            iov_len = 4096}, {iov_base = 0x8, iov_len = 1722187425}, {
            iov_base = 0x18acbae1, iov_len = 1722187353}, {iov_base = 0x30208cdb,
            iov_len = 1722187353}, {iov_base = 0x30208cdb, iov_len = 0}}
        iovcnt = <optimized out>
        total = <optimized out>
        cp = <optimized out>
#5  0x0000772b0ef83765 in malloc_printerr (
    str=str@entry=0x772b0f099628 "free(): double free detected in tcache 2")
    at malloc.c:5772
No locals.
#6  0x0000772b0ef85e1f in _int_free (av=0x772b0f0caac0 <main_arena>,
    p=p@entry=0x625ec6912ae0, have_lock=have_lock@entry=0) at malloc.c:4541
        tmp = <optimized out>
        cnt = <optimized out>
        e = 0x625ec6912af0
        tc_idx = <optimized out>
        size = <optimized out>
        fb = <optimized out>
#7  0x0000772b0ef885ce in __GI___libc_free (mem=0x625ec6912af0) at malloc.c:3398
        ar_ptr = <optimized out>
        p = 0x625ec6912ae0
        err = 22
#8  0x0000625eb0517c29 in cfg_load (requested_path=0x0, self=0x7ffde7d33610)
    at ../wayvnc/src/cfg.c:148
        stream = 0x625ec6912910
        line = 0x625ec6912b20 "\022i\354%\006"
        len = 120
        path = <optimized out>
        lineno = <optimized out>
        path = <optimized out>
        stream = <optimized out>
        line = <optimized out>
--Type <RET> for more, q to quit, c to continue without paging--c
        len = <optimized out>
        lineno = <optimized out>
        failure = <optimized out>
#9  main (argc=<optimized out>, argv=<optimized out>) at ../wayvnc/src/main.c:1834
        self = {do_exit = false, display = 0x0, registry = 0x0, wl_handler = 0x0,
          outputs = {prev = 0x0, next = 0x0}, seats = {prev = 0x0, next = 0x0},
          cfg = {directory = 0x625ec6912af0 "\022i\354%\006", enable_auth = false,
            relax_encryption = false, private_key_file = 0x0,
            certificate_file = 0x0, rsa_private_key_file = 0x0, username = 0x0,
            password = 0x0, address = 0x0, port = 0, enable_pam = false,
            xkb_rules = 0x0, xkb_model = 0x0, xkb_layout = 0x0, xkb_variant = 0x0,
            xkb_options = 0x0, use_relative_paths = false}, keyboard_manager = 0x0,
          pointer_manager = 0x0, data_control_manager = 0x0,
          transient_seat_manager = 0x0, selected_output = 0x0, selected_seat = 0x0,
          screencopy = {status = SCREENCOPY_STOPPED, pool = 0x0, front = 0x0,
            back = 0x0, manager = 0x0, frame = 0x0, userdata = 0x0, on_done = 0x0,
            last_time = 0, start_time = 0, timer = 0x0, delay_smoother = {
              time_constant = 0, last_time = 0, last_result = 0}, delay = 0,
            is_immediate_copy = false, overlay_cursor = false, wl_output = 0x0,
            wl_shm_width = 0, wl_shm_height = 0, wl_shm_stride = 0,
            wl_shm_format = WL_SHM_FORMAT_ARGB8888, have_linux_dmabuf = false,
            enable_linux_dmabuf = false, dmabuf_width = 0, dmabuf_height = 0,
            fourcc = 0, rate_limit = 0}, wayland_handler = 0x0,
          signal_handler = 0x0, nvnc = 0x0, nvnc_display = 0x0, kb_layout = 0x0,
          kb_variant = 0x0, damage_area_sum = 0, n_frames_captured = 0,
          disable_input = false, use_transient_seat = false, nr_clients = 0,
          performance_ticker = 0x0, capture_retry_timer = 0x0, ctl = 0x0,
          is_initializing = false, start_detached = false,
          master_layout_client = 0x0}
        cfg_file = 0x0
        enable_gpu_features = false
        address = 0x0
        port = <optimized out>
        use_unix_socket = <optimized out>
        use_websocket = <optimized out>
        start_detached = false
        output_name = 0x0
        seat_name = 0x0
        socket_path = 0x0
        keyboard_options = <optimized out>
        overlay_cursor = false
        show_performance = false
        max_rate = 30
        disable_input = <optimized out>
        use_transient_seat = <optimized out>
        drm_fd = -1
        log_level = <optimized out>
        option_parser = {name = 0x625eb0523781 "Options",
          options = 0x625eb0529c20 <opts>, n_opts = 20, values = {{
              option = 0x625eb052a010 <opts+1008>,
              value = "trace", '\000' <repeats 250 times>}, {option = 0x0,
              value = '\000' <repeats 255 times>} <repeats 127 times>},
          n_values = 1, position = 0, remaining_argc = 0, remaining_argv = 0x0}
        port_str = <optimized out>
        cfg_rc = <optimized out>
        aml = <optimized out>
        socket_type = <optimized out>
        ctl_actions = {userdata = 0x78, on_attach = 0x0, on_detach = 0x0,
          on_output_cycle = 0x0, on_output_switch = 0x0, on_disconnect_client = 0x0,
          on_wayvnc_exit = 0x0, client_next = 0x0, client_info = 0x0,
          get_output_list = 0x0}
        opts = {{short_opt = 0 '\000', long_opt = 0x0, schema = 0x0,
            help = 0x625eb0525748 "The IP address or unix socket path to listen on.", default_ = 0x625eb0523777 "127.0.0.1", positional = 0x625eb05235a9 "address",
            is_subcommand = false}, {short_opt = 0 '\000', long_opt = 0x0,
            schema = 0x0, help = 0x625eb0523ed0 "The TCP port to listen on.",
            default_ = 0x625eb0523eeb "5900", positional = 0x625eb052387d "port",
            is_subcommand = false}, {short_opt = 67 'C',
            long_opt = 0x625eb05238b5 "config", schema = 0x625eb0523ef0 "<path>",
            help = 0x625eb0523ef7 "Select a config file.", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 103 'g',
            long_opt = 0x625eb05237f2 "gpu", schema = 0x0,
            help = 0x625eb0525780 "Enable features that need GPU.", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 111 'o',
            long_opt = 0x625eb0523a03 "output", schema = 0x625eb0523d79 "<name>",
            help = 0x625eb0523f0d "Select output to capture.", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 107 'k',
            long_opt = 0x625eb052321e "keyboard",
            schema = 0x625eb0523f27 "<layout>[-<variant>]",
            help = 0x625eb05257a0 "Select keyboard layout with an optional variant.", default_ = 0x0, positional = 0x0, is_subcommand = false}, {short_opt = 115 's',
            long_opt = 0x625eb05239f6 "seat", schema = 0x625eb0523d79 "<name>",
            help = 0x625eb0523f3c "Select seat by name.", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 83 'S',
            long_opt = 0x625eb0523815 "socket", schema = 0x625eb0523ef0 "<path>",
            help = 0x625eb0523f51 "Control socket path.", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 116 't',
            long_opt = 0x625eb0523865 "transient-seat", schema = 0x0,
            help = 0x625eb0523f66 "Use transient seat.", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 114 'r',
            long_opt = 0x625eb05237f6 "render-cursor", schema = 0x0,
            help = 0x625eb05257d8 "Enable overlay cursor rendering.",
            default_ = 0x0, positional = 0x0, is_subcommand = false}, {
            short_opt = 102 'f', long_opt = 0x625eb052385d "max-fps",
            schema = 0x625eb0523f7a "<fps>",
            help = 0x625eb0523f80 "Set rate limit.", default_ = 0x625eb0523f90 "30",
            positional = 0x0, is_subcommand = false}, {short_opt = 112 'p',
            long_opt = 0x625eb0523804 "performance", schema = 0x0,
            help = 0x625eb0523f93 "Show performance counters.", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 117 'u',
            long_opt = 0x625eb0523810 "unix-socket", schema = 0x0,
            help = 0x625eb0523fae "Create unix domain socket.", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 100 'd',
            long_opt = 0x625eb0523826 "disable-input", schema = 0x0,
            help = 0x625eb0523fc9 "Disable all remote input.", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 68 'D',
            long_opt = 0x625eb0523874 "detached", schema = 0x0,
            help = 0x625eb0525800 "Start detached from a compositor.",
            default_ = 0x0, positional = 0x0, is_subcommand = false}, {
            short_opt = 86 'V', long_opt = 0x625eb05237c3 "version", schema = 0x0,
            help = 0x625eb0523fe3 "Show version info.", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 118 'v',
            long_opt = 0x625eb0523ff6 "verbose", schema = 0x0,
            help = 0x625eb0525828 "Be more verbose. Same as setting --log-level=info", default_ = 0x0, positional = 0x0, is_subcommand = false}, {short_opt = 119 'w',
            long_opt = 0x625eb052381c "websocket", schema = 0x0,
            help = 0x625eb0523ffe "Create a websocket.", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 76 'L',
            long_opt = 0x625eb0523834 "log-level",
            schema = 0x625eb0524012 "<level>",
            help = 0x625eb0525860 "Set log level. The levels are: error, warning, info, debug trace and quiet.", default_ = 0x625eb0523844 "warning", positional = 0x0,
            is_subcommand = false}, {short_opt = 104 'h',
            long_opt = 0x625eb05237ed "help", schema = 0x0,
            help = 0x625eb052401a "Get help (this text).", default_ = 0x0,
            positional = 0x0, is_subcommand = false}, {short_opt = 0 '\000',
            long_opt = 0x0, schema = 0x0, help = 0x0, default_ = 0x0,
            positional = 0x0, is_subcommand = false}}

- Describe how to reproduce the problem :

I just try to install with your readme instruction and run.

100espressos commented 3 weeks ago

Nice report!

At a glance, your trace seems to be saying there was a panic soon after wayvnc started config loading.

I am getting the same crash with the same version (v0.8.0-15d09b0, though neatvnc v0.8.1), which my testing suggests could be caused by specifying any address on command line or in config.

If I do not specify address, wayvnc does idle but seems to refuse remote connects.

any1 commented 3 weeks ago

If you run this via valgrind that should catch the problem. I do recommend trying the master branch though.

100espressos commented 3 weeks ago

Building from main, command line seems working fine, so can proceed there.

Edit: It would seem that my crash was due to my using 'address <>' instead of 'address=<>' :roll_eyes: