On Sat, Mar 4, 2017 at 5:31 PM, Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote: > Hello, > > The following program creates processes deadlocked in snd_seq_pool_done: > > https://gist.githubusercontent.com/dvyukov/97efc9cb6d63b1b2c7b737b82cc8b0d6/raw/3546b133ae0b2d3e1190ae7c1f4e240ce7ce132e/gistfile1.txt > > After few seconds I get: > > # ps afxu | grep a.out > root 8660 2.0 0.0 0 0 pts/0 Zl 16:27 0:00 > [a.out] <defunct> > > # kill -9 8660 > > # cat /proc/8660/status > Name: a.out > State: Z (zombie) > Tgid: 8660 > Ngid: 0 > Pid: 8660 > PPid: 1 > TracerPid: 0 > Uid: 0 0 0 0 > Gid: 0 0 0 0 > FDSize: 0 > Groups: 0 > NStgid: 8660 > NSpid: 8660 > NSpgid: 8660 > NSsid: 2971 > Threads: 2 > SigQ: 1/3304 > SigPnd: 0000000000000000 > ShdPnd: 0000000000000100 > SigBlk: 0000000000000000 > SigIgn: 0000000180000000 > SigCgt: 0000000000000440 > CapInh: 0000000000000000 > CapPrm: 0000003fffffffff > CapEff: 0000003fffffffff > CapBnd: 0000003fffffffff > CapAmb: 0000000000000000 > NoNewPrivs: 0 > Seccomp: 0 > Cpus_allowed: f > Cpus_allowed_list: 0-3 > Mems_allowed: 00000000,00000001 > Mems_allowed_list: 0 > voluntary_ctxt_switches: 12 > nonvoluntary_ctxt_switches: 0 > > # cat /proc/8660/task/*/stack > [<ffffffff835406db>] snd_seq_pool_done+0x31b/0x620 > sound/core/seq/seq_memory.c:436 > [<ffffffff8353a11e>] snd_seq_ioctl_set_client_pool+0x1ae/0x600 > sound/core/seq/seq_clientmgr.c:1836 > [<ffffffff835382ba>] snd_seq_ioctl+0x2da/0x4d0 > sound/core/seq/seq_clientmgr.c:2130 > [<ffffffff81aced2f>] vfs_ioctl fs/ioctl.c:45 [inline] > [<ffffffff81aced2f>] do_vfs_ioctl+0x1bf/0x1790 fs/ioctl.c:685 > [<ffffffff81ad038f>] SYSC_ioctl fs/ioctl.c:700 [inline] > [<ffffffff81ad038f>] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 > [<ffffffff8457dc41>] entry_SYSCALL_64_fastpath+0x1f/0xc2 A friendly ping. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
