Bug#1087558: cups: lpinfo -v causes a linux kernel crash

["Benjamin L." <assyrium@gmail.com>]

Package: cups
Version: 2.4.10-2
Severity: important
X-Debbugs-Cc: assyrium@gmail.com

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
I use debian testing/unstable. Recently, I noticed that when I wanted to add or
modify a printer on the localhost:631 interface, my computer froze. The system
doesn't have time to write anything to the logs.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?
Following the crashes, I launched Linux in recovery mode. If I run the lpinfo
-v command, the kernel crashes. However, this time information appears in the
console: the intel_ipu6 module is the cause of the crash (!!). I think it's
linked to cups interrogating the serial port and communicating directly with
this module (maybe the bug is linked to intel_ipu6?). Following this, I
performed the following actions to test:
rmmod -f intel_ipu6_isys
rmmod -f intel_ipu6
cups no longer crashes after this

   * What was the outcome of this action?
kernel crash
   * What outcome did you expect instead?
list of printers
*** End of the template - remove these template lines ***


-- System Information:
Debian Release: trixie/sid
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12-rc6-amd64 (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_FORCED_RMMOD
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages cups depends on:
ii  cups-client            2.4.10-2
ii  cups-common            2.4.10-2
ii  cups-core-drivers      2.4.10-2
ii  cups-daemon            2.4.10-2
ii  cups-filters           1.28.17-5
ii  cups-ppdc              2.4.10-2
ii  cups-server-common     2.4.10-2
ii  debconf [debconf-2.0]  1.5.87
ii  ghostscript            10.04.0~dfsg-1
ii  libavahi-client3       0.8-13+b3
ii  libavahi-common3       0.8-13+b3
ii  libc6                  2.40-3
ii  libcups2t64            2.4.10-2
ii  libgcc-s1              14.2.0-8
ii  libstdc++6             14.2.0-8
ii  libusb-1.0-0           2:1.0.27-1+b1
ii  poppler-utils          24.08.0-3
ii  procps                 2:4.0.4-6

Versions of packages cups recommends:
ii  avahi-daemon  0.8-13+b3
ii  colord        1.4.7-1+b2

Versions of packages cups suggests:
pn  cups-bsd                                   <none>
pn  cups-pdf                                   <none>
pn  foomatic-db-compressed-ppds | foomatic-db  <none>
ii  smbclient                                  2:4.21.1+dfsg-2
ii  udev                                       257~rc1-4

-- debconf information:
  cupsys/raw-print: true
  cupsys/backend: lpd, socket, usb, snmp, dnssd