On Fri, 16 Oct 2015 14:59:38 +0200, Takashi Iwai wrote: > > On Fri, 16 Oct 2015 13:50:58 +0200, > David Henningsson wrote: > > > > > > > > On 2015-10-16 10:35, Takashi Iwai wrote: > > > On Fri, 16 Oct 2015 09:16:04 +0200, > > > David Henningsson wrote: > > >> > > >> (Adding pulseaudio-discuss to CC) > > >> > > >> On 2015-10-15 16:26, Takashi Iwai wrote: > > >>> Hi David, > > >>> > > >>> we got bug reports with PA 7.0 where the recent KDE crashes. > > >>> It seems that srbchannel=no works around it, so there is still > > >>> something fishy there. > > >>> > > >>> The bug report is found at > > >>> http://bugzilla.opensuse.org/show_bug.cgi?id=950487 > > >> > > >> Hi Takashi and thanks for reporting. > > >> > > >> I've tried running PA 7.0's pactl under valgrind, and it reports no > > >> errors here. Still, looking at the one of the backtraces the value of f > > >> is something interesting: > > >> > > >> #6 flush (f=f at entry=0x4545454545454545) at pulsecore/fdsem.c:143 > > >> #7 0x00007fe30f378fc2 in pa_fdsem_before_poll (f=0x4545454545454545) at > > >> pulsecore/fdsem.c:295 > > >> #8 0x00007fe30f38f697 in srbchannel_rwloop (sr=0x25bdd40) at > > >> pulsecore/srbchannel.c:203 > > >> > > >> Does 0x4545454545454545 mean anything specific on OpenSUSE? (Like, a > > >> magic clear value or something?) > > > > > > I don't think it's openSUSE specific. It's likely the guard put by > > > either gcc or glibc. > > > FWIW, we pass the default optimization flags like: > > > CFLAGS=-fmessage-length=0 -grecord-gcc-switches -O2 -Wall \ > > > -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables \ > > > -fasynchronous-unwind-tables -g -fPIE > > > > > > The problem was reported from both gcc-4.8 and gcc-5.x systems, so the > > > gcc version is likely irrelevant. > > > > > >> Also, are there any distro patches to OpenSUSE and if so, where can I > > >> find them? > > > > > > No, there is no patches apparently relevant with this. Actually there are > > > three patches, one is to check an additional environment check in > > > start-pulseaudio-x11, another is to suppress an error log at > > > sockaddr_prepare(), and the last is a fix in memset() size in > > > echo-cancel/adrian-aec.c. But all these should be safe. > > > > > > All sources, patches, build log and binaries are found in OBS, e.g. at > > > https://build.opensuse.org/package/show/multimedia:libs/pulseaudio > > > > Ok, thanks. > > > > I've been trying to analyze the backtrace. > > > > My guess is that the srbchannel is being destroyed somehow, but I don't > > see how. Any chance we can get more info from this, e g, build > > pulseaudio's client library with -DDEBUG_SRBCHANNEL=1 and then get a log > > like this: > > > > PULSE_LOG=99 pactl info > > > > ...which includes the crash? > > OK, I'm building a package with the debug enabled and will ask > reporters to test with it. Attached below. Takashi === Parsing configuration file '/etc/pulse/client.conf' Using shared memory pool with 1024 slots of size 64,0 KiB each, total size is 64,0 MiB, maximum usable slot size is 65472 Trying to connect to {6d6d572d956b40f294aa3c73329c58c8}unix:/run/user/1000/pulse/native... SHM possible: yes Protocol version: remote 30, local 30 Negotiated SHM: yes Enabling io event on fd 9 Calling rw loop from deferred event In rw loop from srbchannel, before callback, count = 0 Read 0 bytes from srbchannel In rw loop from srbchannel, after callback, count = 0 Read 0 bytes from srbchannel Read 0 bytes from srbchannel Wrote 30 bytes to srbchannel, signalling fdsem Read 0 bytes from srbchannel In rw loop from srbchannel, before callback, count = 176 Read 20 bytes from srbchannel Read 156 bytes from srbchannel Server String: unix:/run/user/1000/pulse/native Library Protocol Version: 30 Server Protocol Version: 30 Is Local: yes Client Index: 12 Tile Size: 65472 User Name: alberto Host Name: linux-vekw.suse Server Name: pulseaudio Server Version: 7.0 Default Sample Specification: s16le 2ch 44100Hz Default Channel Map: front-left,front-right Default Sink: alsa_output.pci-0000_00_1b.0.analog-stereo Default Source: alsa_input.pci-0000_00_1b.0.analog-stereo Cookie: ea75:72ba Freeing srbchannel In rw loop from srbchannel, after callback, count = -1680245669 Errore di segmentazione
