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Bug#913929: pldd never stops



Package: libc-bin
Version: 2.27-8
Severity: normal

Hi,

I've ran `pldd $$`, but it never comes to an end. I've killed the process
with SIGQUIT and got this backtrace:

```
           PID: 10556 (pldd)
           UID: 1000 (joerg)
           GID: 1000 (joerg)
        Signal: 3 (QUIT)
     Timestamp: Sat 2018-11-17 08:33:56 CET (5min ago)
  Command Line: pldd 953
    Executable: /usr/bin/pldd
 Control Group: /user.slice/user-1000.slice/session-1.scope
          Unit: session-1.scope
         Slice: user-1000.slice
       Session: 1
     Owner UID: 1000 (joerg)
       Boot ID: 87a38c39c06e4c36b4eebb33c4e3e2ac
    Machine ID: 523cb54753234ed08c13ec497d0d3b64
      Hostname: zenbook
       Storage: /var/lib/systemd/coredump/core.pldd.1000.87a38c39c06e4c36b4eebb33c4e3e2ac.10556.1542440036000000.lz4
       Message: Process 10556 (pldd) of user 1000 dumped core.
                
                Stack trace of thread 10556:
                #0  0x00007f81a7d6a7a7 __libc_pread64 (libc.so.6)
                #1  0x0000557c5866224d n/a (pldd)
                #2  0x0000557c58661792 n/a (pldd)
                #3  0x00007f81a7ca5b17 __libc_start_main (libc.so.6)
                #4  0x0000557c5866184a n/a (pldd)

[New LWP 10556]
Core was generated by `pldd 953'.
Program terminated with signal SIGQUIT, Quit.
#0  0x00007f81a7d6a7a7 in __libc_pread64 (fd=4, buf=0x7ffebbcd5900, count=16, offset=140221672822504) at ../sysdeps/unix/sysv/linux/pread64.c:29
29	../sysdeps/unix/sysv/linux/pread64.c: Datei oder Verzeichnis nicht gefunden.
#0  0x00007f81a7d6a7a7 in __libc_pread64 (fd=4, buf=0x7ffebbcd5900, count=16, offset=140221672822504) at ../sysdeps/unix/sysv/linux/pread64.c:29
        resultvar = 16
        sc_ret = <optimized out>
        sc_ret = <optimized out>
        resultvar = <optimized out>
        resultvar = <optimized out>
        __arg4 = <optimized out>
        __arg3 = <optimized out>
        __arg2 = <optimized out>
        __arg1 = <optimized out>
        _a4 = <optimized out>
        _a3 = <optimized out>
        _a2 = <optimized out>
        _a1 = <optimized out>
        sc_cancel_oldtype = <optimized out>
        resultvar = <optimized out>
        resultvar = <optimized out>
        __arg4 = <optimized out>
        __arg3 = <optimized out>
        __arg2 = <optimized out>
        __arg1 = <optimized out>
        _a4 = <optimized out>
        _a3 = <optimized out>
        _a2 = <optimized out>
        _a1 = <optimized out>
#1  0x0000557c5866224d in find_maps64 (pid=<optimized out>, auxv=<optimized out>, auxv_size=<optimized out>) at pldd-xx.c:230
        ln = {name = 140221672822528, next = 0}
        m = {l_addr = 93944802607104, l_name = 140221672822528, l_ld = 93944803440424, l_next = 140221672822544, l_prev = 0, l_real = 140221672821104, l_ns = 0, l_libname = 140221672822504}
        name_offset = 140221672822528
        phdr = <optimized out>
        phnum = <optimized out>
        phent = <optimized out>
        auxvXX = <optimized out>
        p = <optimized out>
        offset = <optimized out>
        list = <optimized out>
        interp = <optimized out>
        tmpbuf = {data = 0x7ffebbcd5960, length = 1024, __space = {__align = {__max_align_ll = 0, __max_align_ld = <invalid float value>}, __c = '\000' <repeats 17 times>, "\360\231\220\377\177\000\000\260\233\377\346\207\177\000\000H\363\231\220\377\177\000\000\000\260\372\346\207\177\000\000p\221\377\346\207\177\000\000\020\227\377\346\207\177\000\000\000\000\000\000\000\000\000\000\210\233\377\346\207\177", '\000' <repeats 34 times>, "\240v\377\346\207\177\000\000\260v\377\346\207\177\000\000\300v\377\346\207\177", '\000' <repeats 26 times>, "\250\363\231\220\377\177\000\000\270\363\231\220\377\177", '\000' <repeats 18 times>, "H\363\231\220\377\177\000\000\000\000\000\000\000\000\000\000"...}}
        status = 0
#2  0x0000557c58661792 in get_process_info (pid=953, dfd=3) at pldd.c:338
        fd = 5
        auxv = 0x557c59f6b480
        retval = <optimized out>
        e_ident = "\177ELF\002\001\001\000\000\000\000\000\000\000\000"
        auxv_size = 320
        fd = <optimized out>
        e_ident = <optimized out>
        auxv_size = <optimized out>
        auxv = <optimized out>
        retval = <optimized out>
        n = <optimized out>
#3  main (argc=<optimized out>, argv=<optimized out>) at pldd.c:193
        remaining = 1
        __PRETTY_FUNCTION__ = "main"
        endp = 0x557c59f6b4f6 ""
        pid = 953
        buf = "/proc/953\000ͻ\376\177\000\000\001\000\000\000\000\000\000\000\265Iҧ\201\177"
        dfd = <optimized out>
        exebuf = {data = 0x7ffebbcd5e20, length = 1024, __space = {__align = {__max_align_ll = 7526493746400682543, __max_align_ld = <invalid float value>}, __c = "/bin/zsh\000_ͻ\376\177\000\000\210\t䧁\177\000\000\360\331见\177\000\000\000\000\000\000\000\000\000\000\027\362槁\177\000\000\001\000\000\000\000\000\000\000\210\t䧁\177\000\000\001", '\000' <repeats 15 times>, "\001\000\000\000\000\000\000\000\360\331见\177\000\000\061Y槁\177\000\000\000\000\000\000\001\000\000\000\300^ͻ\376\177\000\000\320^ͻ\376\177\000\000\310\344见\177\000\000\000\000\000\000\000\000\000\000``ͻ\376\177\000\000 @ʧ\201\177\000\000\377\377\377\377\000\000\000\000 \240㧁\177\000\000X\201ȧ\201\177\000\000\000\000䧁\177", '\000' <repeats 18 times>, "\001\000\000\000\376\177\000\000\330\321ֻ\376\177\000\000\000\000\000\000"...}}
        nexe = <optimized out>
        thread_list = 0x7ffebbcd5db0
        taskfd = <optimized out>
        dir = <optimized out>
        d = <optimized out>
        status = <optimized out>
```

Regards Jörg


-- System Information:
Debian Release: buster/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-rc7-amd64 (SMP w/8 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libc-bin depends on:
ii  libc6  2.27-8

Versions of packages libc-bin recommends:
ii  manpages  4.16-1

libc-bin suggests no packages.

-- no debconf information

-- 
Der Mensch hat die Atombombe erfunden.
Keine Maus der Welt käme auf die Idee, eine Mausefalle zu konstruieren.

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