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[Dmitry Shachnev <mitya57@xxxxxxxxx>]

Public bug reported:

Hi,

I have HP PhotoSmart C4283 and a (mostly) fresh Ubuntu 14.10 amd64
installation.

Any scanning program, like simple-scan or xsane, hangs when trying to do
anything with this printer (the process becomes defunct/zombie).

The backtrace is:

#0  ioctl () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007fffecd80b40 in pp_probe_devices (lst=0xb <error: Cannot access memory at address 0xb>, lst@entry=0x7fffffff5790 "", lst_size=-2147192681, lst_size@entry=16144, 
    cnt=0x7fffffff4d9c, cnt@entry=0x7fffffff5468) at io/hpmud/pp.c:1228
#2  0x00007fffecd78661 in hpmud_probe_devices (bus=bus@entry=HPMUD_BUS_ALL, 
    buf=buf@entry=0x7fffffff56a0 "direct hp:/usb/Photosmart_C4200_series?serial=MY798KP16D04VP \"HP Photosmart C4200 series\" \"HP Photosmart C4200 series USB MY798KP16D04VP HPLIP\" \"MFG:HP;MDL:Photosmart C4200 series;CLS:PRINTER;DES:Phot"..., buf_size=buf_size@entry=16384, cnt=cnt@entry=0x7fffffff5468, bytes_read=bytes_read@entry=0x7fffffff546c)
    at io/hpmud/hpmud.c:600
#3  0x00007fffed3796c5 in DevDiscovery (localOnly=localOnly@entry=0) at scan/sane/hpaio.c:278
#4  0x00007fffed379cd9 in sane_hpaio_get_devices (deviceList=0x7fffffff9758, localOnly=0) at scan/sane/hpaio.c:359
#5  0x00007ffff7bd6427 in sane_dll_get_devices (device_list=0x69fb80, local_only=0) at dll.c:1058

According to strace, the last two syscalls are:

open("/dev/parport0", O_RDONLY|O_NOCTTY) = 11
ioctl(11, PPGETMODES, 0x7fffbe27f54c)

... and the last one (ioctl) hangs (i.e. strace didn't print even the
closing bracket).

This happens even when the device is NOT plugged via USB.

** Affects: hplip (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1378748

Title:
  All scanning programs hang in pp_probe_devices()

Status in “hplip” package in Ubuntu:
  New

Bug description:
  Hi,

  I have HP PhotoSmart C4283 and a (mostly) fresh Ubuntu 14.10 amd64
  installation.

  Any scanning program, like simple-scan or xsane, hangs when trying to
  do anything with this printer (the process becomes defunct/zombie).

  The backtrace is:

  #0  ioctl () at ../sysdeps/unix/syscall-template.S:81
  #1  0x00007fffecd80b40 in pp_probe_devices (lst=0xb <error: Cannot access memory at address 0xb>, lst@entry=0x7fffffff5790 "", lst_size=-2147192681, lst_size@entry=16144, 
      cnt=0x7fffffff4d9c, cnt@entry=0x7fffffff5468) at io/hpmud/pp.c:1228
  #2  0x00007fffecd78661 in hpmud_probe_devices (bus=bus@entry=HPMUD_BUS_ALL, 
      buf=buf@entry=0x7fffffff56a0 "direct hp:/usb/Photosmart_C4200_series?serial=MY798KP16D04VP \"HP Photosmart C4200 series\" \"HP Photosmart C4200 series USB MY798KP16D04VP HPLIP\" \"MFG:HP;MDL:Photosmart C4200 series;CLS:PRINTER;DES:Phot"..., buf_size=buf_size@entry=16384, cnt=cnt@entry=0x7fffffff5468, bytes_read=bytes_read@entry=0x7fffffff546c)
      at io/hpmud/hpmud.c:600
  #3  0x00007fffed3796c5 in DevDiscovery (localOnly=localOnly@entry=0) at scan/sane/hpaio.c:278
  #4  0x00007fffed379cd9 in sane_hpaio_get_devices (deviceList=0x7fffffff9758, localOnly=0) at scan/sane/hpaio.c:359
  #5  0x00007ffff7bd6427 in sane_dll_get_devices (device_list=0x69fb80, local_only=0) at dll.c:1058

  According to strace, the last two syscalls are:

  open("/dev/parport0", O_RDONLY|O_NOCTTY) = 11
  ioctl(11, PPGETMODES, 0x7fffbe27f54c)

  ... and the last one (ioctl) hangs (i.e. strace didn't print even the
  closing bracket).

  This happens even when the device is NOT plugged via USB.

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