lkml.org 
[lkml]   [2008]   [Aug]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] msr: Fix NULL pointer deref due to msr_open on nonexistent CPUs
    On Thu, 14 Aug 2008 15:43:33 -0700
    "Darrick J. Wong" <djwong@us.ibm.com> wrote:

    > msr_open tests for someone trying to open a device for a nonexistent
    > CPU. However, the function always returns 0, not ret like it should,
    > hence userspace can BUG the kernel trivially. This bug was
    > introduced by the cdev lock_kernel pushdown patch last May.

    > - return 0;
    > + return ret;

    Oops, that was pretty silly. Apologies for the screwup.

    jon


    \
     
     \ /
      Last update: 2008-08-15 16:59    [W:0.047 / U:1.664 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site