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[Bug 1450825] [NEW] Reading from /proc/brcm_monitor0 causes lockup of CPU

 

Public bug reported:

Steps to reproduce:
  Install and use bcmwl-kernel-source
  $ cat /proc/brcm_monitor0
What happens:
  $ dmesg
  ...
  Watchdog detected hard LOCKUP on cpu 1
  ...

Tested on Trusty and Vivid.
The file is readable by everyone. At least change this to only root.

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

** Summary changed:

- Reading from /proc/brcm_monitor0 causes soft lockup of CPU
+ Reading from /proc/brcm_monitor0 causes lockup of CPU

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https://bugs.launchpad.net/bugs/1450825

Title:
  Reading from /proc/brcm_monitor0 causes lockup of CPU

Status in bcmwl package in Ubuntu:
  New

Bug description:
  Steps to reproduce:
    Install and use bcmwl-kernel-source
    $ cat /proc/brcm_monitor0
  What happens:
    $ dmesg
    ...
    Watchdog detected hard LOCKUP on cpu 1
    ...

  Tested on Trusty and Vivid.
  The file is readable by everyone. At least change this to only root.

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https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1450825/+subscriptions


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References