Bug#925553: audacity: segfault in NumericTextCtrl::ValueToControls() ()
Control: retitle 925553 audacity: with ssh X-forwarding: PaAlsaStreamComponent_BeginPolling: Assertion `ret == self->nfds' failed. Hello Jeff Cliff, I looked at this backtrace without deeper knowledge of audacity and the problem might not be a segfault in mentioned funciton, instead a SIGABRT from pulseaudio. Instead I guess it is in the first backtrace of yours, showing in libportaudio.so.2. By the way, installing the debug symbols [1] would be helpful for the maintainers to get an idea of where the problem is. In this case package libportaudio2-dbgsym. Having audacity running in gdb with an active breakpoint at PaAlsaStreamComponent_BeginPolling and just continuing a few times leads to such a backtrace. (But my "network" connection was just into a VM on the same host.) Did you also debug audacity or did you let it run freely? Is your ssh connection over a slow network link? Should this bug be reassigned to pulseaudio? Kind regards, Bernhard [1] https://wiki.debian.org/HowToGetABacktrace#Installing_the_debugging_symbols (gdb) bt #0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50 #1 0x73661535 in __GI_abort () at abort.c:79 #2 0x7366140f in __assert_fail_base (fmt=0x7fffe92021d2 "%s%s%s:%u: %s%sZusicherung »%s« nicht erfüllt.\n%n", assertion=0x77d7a66e "ret == self->nfds", file=0x77d74038 "src/hostapi/alsa/pa_linux_alsa.c", line=3641, function=) at assert.c:92 #3 0x7366f0f2 in __GI___assert_fail (assertion=assertion@entry=0x77d7a66e "ret == self->nfds", file=file@entry=0x77d74038 "src/hostapi/alsa/pa_linux_alsa.c", line=line@entry=3641, function=function@entry=0x77d7abe0 <__PRETTY_FUNCTION__.12102> "PaAlsaStreamComponent_BeginPolling") at assert.c:101 #4 0x77d5c1c3 in PaAlsaStreamComponent_BeginPolling (pfds=, self=) at src/hostapi/alsa/pa_linux_alsa.c:3641 #5 0x77d69e85 in PaAlsaStreamComponent_BeginPolling (pfds=, self=) at src/hostapi/alsa/pa_linux_alsa.c:3931 #6 PaAlsaStream_WaitForFrames (self=self@entry=0x56867c00, framesAvail=framesAvail@entry=0x7fffe8007720, xrunOccurred=xrunOccurred@entry=0x7fffe800771c) at src/hostapi/alsa/pa_linux_alsa.c:3802 #7 0x77d6a63e in CallbackThreadFunc (userData=0x56867c00) at src/hostapi/alsa/pa_linux_alsa.c:4274 #8 0x73b34fa3 in start_thread (arg=) at pthread_create.c:486 #9 0x7373882f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 # Buster amd64 qemu VM 2019-03-28 apt update apt dist-upgrade apt install dpkg-dev devscripts systemd-coredump alsa-utils audacity pulseaudio libportaudio2-dbgsym gdb elfutils elfutils-dbgsym libelf1-dbgsym strace binutils mc $ ssh -X -p benutzer@$LOCALIP benutzer@debian:~$ audacity -> record -> no crash -> cursor is moving as usual ## cp -a /usr/lib/x86_64-linux-gnu/libportaudio.so.2.0.0 /tmp/libportaudio.so.2.0.0 cp -a /usr/lib/debug/.build-id/4d/7ecbcc022ad848e4da5356dfeaf76b5230731d.debug /tmp/7ecbcc022ad848e4da5356dfeaf76b5230731d.debug LANG=C eu-unstrip --force /tmp/libportaudio.so.2.0.0 /tmp/7ecbcc022ad848e4da5356dfeaf76b5230731d.debug eu-unstrip: cannot write output file: invalid section alignment # Doh! mkdir /home/benutzer/source/elfutils/orig -p cd/home/benutzer/source/elfutils/orig apt source elfutils cd mkdir /home/benutzer/source/libc6/orig -p cd/home/benutzer/source/libc6/orig apt source libc6 cd grep "invalid section alignment" . -rn grep "ELF_E_INVALID_SHENTSIZE_IDX" . -rn grep "ELF_E_INVALID_SHENTSIZE" . -rn gdb -q -ex 'set width 0' -ex 'set pagination off' -ex 'directory /home/benutzer/source/elfutils/orig/elfutils-0.176/libelf' -ex 'b elf32_updatenull.c:399' -ex 'run' --args eu-unstrip --force /tmp/libportaudio.so.2.0.0 /tmp/7ecbcc022ad848e4da5356dfeaf76b5230731d.debug (gdb) bt #0 __libelf_seterrno (value=value@entry=36) at elf_error.c:336 #1 0x77fb3f7a in __elf64_updatenull_wrlock (elf=elf@entry=0x55564f30, change_bop=change_bop@entry=0x7fffd2ec, shnum=shnum@entry=35) at elf32_updatenull.c:215 #2 0x77fb2fb0 in elf_update (elf=0x55564f30, cmd=ELF_C_WRITE) at elf_update.c:209 #3 0xbb67 in copy_elided_sections (unstripped=, stripped=, stripped_ehdr=, bias=) at unstrip.c:2070 #4 0xc1a3 in handle_file (output_file=0x0, create_dirs=, stripped=0x55563900, stripped_ehdr=0x7fffe200, unstripped=0x55564f30) at unstrip.c:2132 #5 0xc3b9 in handle_explicit_files (output_file=0x0, create_dirs=, force=) at unstrip.c:2223 #6 0x6c81 in main (argc=, argv=0x7fffe558) at unstrip.c:2558 1: x/i $pc => 0x77faa520 <__libelf_seterrno>: push %rbx ## mkdir /home/benutzer/source/libportaudio2/orig -p cd/home/benutzer/source/libportaudio2/orig apt source libportaudio2 cd script -c "gdb -q -ex 'set width 0' -ex 'set pagination off' -ex 'b main' -ex 'run' --args audacity" -a gdb-dissassemble_$(date
Bug#925553: audacity: segfault in NumericTextCtrl::ValueToControls() ()
Package: audacity Version: 2.2.2-1+b1 Severity: normal Dear Maintainer, What I did: ssh -X (hostname) //ssh'd to remote host on network audacity // ran audacity on remote host with broadcast of UI to local host recorded audio // hit red record button What happened: segfault/crash recording host was using the following hardware: *-multimedia description: Multimedia audio controller product: 82801G (ICH7 Family) AC'97 Audio Controller vendor: Intel Corporation physical id: 1e.2 bus info: pci@:00:1e.2 version: 01 width: 32 bits clock: 33MHz capabilities: pm bus_master cap_list configuration: driver=snd_intel8x0 latency=0 resources: irq:23 ioport:ec00(size=256) ioport:e8c0(size=64) memory:feabfa00-feabfbff memory:feabf900-feabf9ff Audacity crashed/segfaulted in the following stack frames: (gdb) (gdb) bt #0 0x7f02396718bb in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50 #1 0x7f023965c535 in __GI_abort () at abort.c:79 #2 0x7f023965c40f in __assert_fail_base (fmt=0x7f02397beee0 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x7f023dd7566e "ret == self->nfds", file=0x7f023dd6f038 "src/hostapi/alsa/pa_linux_alsa.c", line=3641, function=) at assert.c:92 #3 0x7f023966a0f2 in __GI___assert_fail (assertion=0x7f023dd7566e "ret == self->nfds", file=0x7f023dd6f038 "src/hostapi/alsa/pa_linux_alsa.c", line=3641, function=0x7f023dd75be0 "PaAlsaStreamComponent_BeginPolling") at assert.c:101 #4 0x7f023dd571c3 in () at /usr/lib/x86_64-linux-gnu/libportaudio.so.2 #5 0x7f023dd64e85 in () at /usr/lib/x86_64-linux-gnu/libportaudio.so.2 #6 0x7f023dd6563e in () at /usr/lib/x86_64-linux-gnu/libportaudio.so.2 #7 0x7f0239b2ffa3 in start_thread (arg=) at pthread_create.c:486 #8 0x7f023973382f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 (gdb) thread 2 [Switching to thread 2 (Thread 0x7f022e9a7700 (LWP 13226))] bt #0 0x7f0239b39bf0 in __GI___nanosleep (requested_time=0x7f022e9a65b0, remaining=0x0) at ../sysdeps/unix/sysv/linux/nanosleep.c:28 28 ../sysdeps/unix/sysv/linux/nanosleep.c: No such file or directory. (gdb) bt #0 0x7f0239b39bf0 in __GI___nanosleep (requested_time=0x7f022e9a65b0, remaining=0x0) at ../sysdeps/unix/sysv/linux/nanosleep.c:28 #1 0x7f023cfe3fdc in wxMicroSleep(unsigned long) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0 #2 0x55d080a4e662 in AudioThread::Entry() () #3 0x7f023cfd8d72 in wxThread::CallEntry() () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0 #4 0x7f023cfe2374 in () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0 #5 0x7f0239b2ffa3 in start_thread (arg=) at pthread_create.c:486 #6 0x7f023973382f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 (gdb) thread 3 [Switching to thread 3 (Thread 0x7f022f1a8700 (LWP 13225))] #0 0x7f0239b39bf0 in __GI___nanosleep (requested_time=0x7f022f1a75b0, remaining=0x0) at ../sysdeps/unix/sysv/linux/nanosleep.c:28 28 in ../sysdeps/unix/sysv/linux/nanosleep.c (gdb) bt #0 0x7f0239b39bf0 in __GI___nanosleep (requested_time=0x7f022f1a75b0, remaining=0x0) at ../sysdeps/unix/sysv/linux/nanosleep.c:28 #1 0x7f023cfe3fdc in wxMicroSleep(unsigned long) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0 #2 0x55d080a482ef in MidiThread::Entry() () #3 0x7f023cfd8d72 in wxThread::CallEntry() () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0 #4 0x7f023cfe2374 in () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0 #5 0x7f0239b2ffa3 in start_thread (arg=) at pthread_create.c:486 #6 0x7f023973382f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 (gdb) thread 4 [Switching to thread 4 (Thread 0x7f022ffa9600 (LWP 13219))] #0 0x55d080a0f5d0 in void std::__cxx11::basic_string, std::allocator >::_M_construct(wchar_t*, wchar_t*, std::forward_iterator_tag) () (gdb) bt #0 0x55d080a0f5d0 in void std::__cxx11::basic_string, std::allocator >::_M_construct(wchar_t*, wchar_t*, std::forward_iterator_tag) () #1 0x55d080e19255 in NumericTextCtrl::ValueToControls() () #2 0x55d080e19330 in NumericTextCtrl::SetValue(double) () #3 0x55d080d7461b in SelectionBar::ValuesToControls() () #4 0x55d080b1f9ff in AudacityProject::TP_DisplaySelection() () #5 0x55d080dc7b56 in PlayIndicatorOverlay::OnTimer(wxCommandEvent&) () #6 0x7f023d00a7ae in wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0 #7 0x7f023d00ab2a in wxEvtHandler::SearchDynamicEventTable(wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0 #8 0x7f023d00abc0 in wxEvtHandler::TryHereOnly(wxEvent&) () at /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0 #9
