bugGNU GRUB - Bugs: bug #42134, loadenv.c – check_blocklists –...


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bug #42134: loadenv.c – check_blocklists – algorithm for block overlap check is wrong

Submitter:  Роман Пехов <roman_pekhov>
Submitted:  Thu 17 Apr 2014 02:17:55 PM UTC
Votes: 101
Category:  Configuration Severity:  Major
Priority:  5 - Normal Item Group:  Software Error
Status:  Fixed Privacy:  Public
Assigned to:  None Originator Name: 
Open/Closed:  Closed Release:  Git master
Release:  Reproducibility:  Every Time
Planned Release:  None

Sun 22 Jun 2014 01:37:50 AM UTC, comment #1: 

Committed, thanks.

Vladimir Serbinenko <phcoder>
Group administrator
Thu 17 Apr 2014 02:17:55 PM UTC, original submission:  

The check_blocklists function surely writes "malformed file" error if the block list contains more than one blocks.

The well-known overlap check algorithm is:

if (s1 < e2  &&  s2 < e1)
    return grub_error (GRUB_ERR_BAD_FS, "malformed file");

Swap (s1 <-> s2, e1 <-> e2) is not needed in this case.

Роман Пехов <roman_pekhov>


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Carbon-Copy List
  • -email is unavailable- added by phcoder (Posted a comment)
  • -email is unavailable- added by sharifm (Voted in favor of this item)
  • -email is unavailable- added by roman_pekhov (Voted in favor of this item)
  • -email is unavailable- added by roman_pekhov (Submitted the item)

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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2014-06-22 phcoder StatusNone Fixed
        Open/ClosedOpen Closed
    2014-05-18 sharifm Carbon-Copy- Added sharifm
    2014-04-19 roman_pekhov Carbon-Copy- Added roman_pekhov

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