Re: A Famous Security Bug

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Sujet : Re: A Famous Security Bug
De : joerg-mertens (at) *nospam* t-online.de (Joerg Mertens)
Groupes : comp.lang.c
Date : 20. Mar 2024, 19:59:36
Autres entêtes
Organisation : privat
Message-ID : <87ttl0pw4n.fsf@jmertens.eternal-september.org>
References : 1
User-Agent : Gnus/5.13 (Gnus v5.13)
ram@zedat.fu-berlin.de (Stefan Ram) writes:

  A "famous security bug":
>
void f( void )
{ char buffer[ MAX ];
  /* . . . */
  memset( buffer, 0, sizeof( buffer )); }
>
  . Can you see what the bug is?
>
  (I have already read the answer; I post it as a pastime.)

The optimizer deletes the memset statement because buffer is not
accessed after it?

Date Sujet#  Auteur
20 Mar 24 * A Famous Security Bug118Stefan Ram
20 Mar 24 +* Re: A Famous Security Bug108Kaz Kylheku
20 Mar 24 i+* Re: A Famous Security Bug2Keith Thompson
20 Mar 24 ii`- Re: A Famous Security Bug1Keith Thompson
21 Mar 24 i+* Re: A Famous Security Bug35David Brown
21 Mar 24 ii`* Re: A Famous Security Bug34Kaz Kylheku
21 Mar 24 ii +* Re: A Famous Security Bug4Chris M. Thomasson
21 Mar 24 ii i`* Re: A Famous Security Bug3Chris M. Thomasson
22 Mar 24 ii i `* Re: A Famous Security Bug2Chris M. Thomasson
22 Mar 24 ii i  `- Re: A Famous Security Bug1Chris M. Thomasson
21 Mar 24 ii +* Re: A Famous Security Bug28Keith Thompson
22 Mar 24 ii i+* Re: A Famous Security Bug24Kaz Kylheku
22 Mar 24 ii ii+* Re: A Famous Security Bug19Keith Thompson
22 Mar 24 ii iii`* Re: A Famous Security Bug18Kaz Kylheku
22 Mar 24 ii iii +* Re: A Famous Security Bug2James Kuyper
22 Mar 24 ii iii i`- Re: A Famous Security Bug1Kaz Kylheku
22 Mar 24 ii iii +- Re: A Famous Security Bug1David Brown
22 Mar 24 ii iii `* Re: A Famous Security Bug14Keith Thompson
22 Mar 24 ii iii  `* Re: A Famous Security Bug13Kaz Kylheku
23 Mar 24 ii iii   `* Re: A Famous Security Bug12David Brown
23 Mar 24 ii iii    `* Re: A Famous Security Bug11Kaz Kylheku
23 Mar 24 ii iii     +* Re: A Famous Security Bug2David Brown
24 Mar 24 ii iii     i`- Re: A Famous Security Bug1Kaz Kylheku
23 Mar 24 ii iii     `* Re: A Famous Security Bug8James Kuyper
24 Mar 24 ii iii      `* Re: A Famous Security Bug7Kaz Kylheku
24 Mar 24 ii iii       `* Re: A Famous Security Bug6David Brown
24 Mar 24 ii iii        `* Re: A Famous Security Bug5Kaz Kylheku
24 Mar 24 ii iii         +* Re: A Famous Security Bug3David Brown
27 Mar 24 ii iii         i`* Re: A Famous Security Bug2Kaz Kylheku
28 Mar 24 ii iii         i `- Re: A Famous Security Bug1David Brown
24 Mar 24 ii iii         `- Re: A Famous Security Bug1Chris M. Thomasson
22 Mar 24 ii ii+- Re: A Famous Security Bug1James Kuyper
22 Mar 24 ii ii`* Re: A Famous Security Bug3David Brown
22 Mar 24 ii ii `* Re: A Famous Security Bug2Kaz Kylheku
22 Mar 24 ii ii  `- Re: A Famous Security Bug1David Brown
22 Mar 24 ii i`* Re: A Famous Security Bug3James Kuyper
22 Mar 24 ii i `* Re: A Famous Security Bug2Kaz Kylheku
22 Mar 24 ii i  `- Re: A Famous Security Bug1James Kuyper
22 Mar 24 ii `- Re: A Famous Security Bug1David Brown
21 Mar 24 i`* Re: A Famous Security Bug70Anton Shepelev
21 Mar 24 i +- Re: A Famous Security Bug1Keith Thompson
21 Mar 24 i +* Re: A Famous Security Bug15Kaz Kylheku
22 Mar 24 i i+* Re: A Famous Security Bug13David Brown
22 Mar 24 i ii`* Re: A Famous Security Bug12Kaz Kylheku
22 Mar 24 i ii +- Re: A Famous Security Bug1James Kuyper
22 Mar 24 i ii `* Re: A Famous Security Bug10David Brown
23 Mar 24 i ii  `* Re: A Famous Security Bug9Richard Kettlewell
23 Mar 24 i ii   +- Re: A Famous Security Bug1Kaz Kylheku
23 Mar 24 i ii   +* Re: A Famous Security Bug2David Brown
23 Mar 24 i ii   i`- Re: A Famous Security Bug1Kaz Kylheku
24 Mar 24 i ii   `* Re: A Famous Security Bug5Tim Rentsch
24 Mar 24 i ii    `* Re: A Famous Security Bug4Malcolm McLean
17 Apr 24 i ii     `* Re: A Famous Security Bug3Tim Rentsch
18 Apr 24 i ii      +- Re: A Famous Security Bug1David Brown
18 Apr 24 i ii      `- Re: A Famous Security Bug1Keith Thompson
28 Mar 24 i i`- Re: A Famous Security Bug1Anton Shepelev
22 Mar 24 i +- Re: A Famous Security Bug1Tim Rentsch
22 Mar 24 i `* Re: A Famous Security Bug52James Kuyper
22 Mar 24 i  `* Re: A Famous Security Bug51bart
23 Mar 24 i   +* Re: A Famous Security Bug5Keith Thompson
23 Mar 24 i   i`* Re: A Famous Security Bug4Kaz Kylheku
23 Mar 24 i   i `* Re: A Famous Security Bug3David Brown
23 Mar 24 i   i  `* Re: A Famous Security Bug2bart
24 Mar 24 i   i   `- Re: A Famous Security Bug1David Brown
23 Mar 24 i   `* Re: A Famous Security Bug45James Kuyper
23 Mar 24 i    `* Re: A Famous Security Bug44bart
23 Mar 24 i     +* Re: A Famous Security Bug37David Brown
23 Mar 24 i     i`* Re: A Famous Security Bug36bart
24 Mar 24 i     i +* Re: A Famous Security Bug29David Brown
24 Mar 24 i     i i`* Re: A Famous Security Bug28bart
24 Mar 24 i     i i +* Re: A Famous Security Bug12Keith Thompson
25 Mar 24 i     i i i+- Re: A Famous Security Bug1David Brown
25 Mar 24 i     i i i+* Re: A Famous Security Bug3Michael S
25 Mar 24 i     i i ii+- Re: A Famous Security Bug1David Brown
25 Mar 24 i     i i ii`- Re: A Famous Security Bug1Keith Thompson
25 Mar 24 i     i i i`* Re: A Famous Security Bug7bart
25 Mar 24 i     i i i `* Re: A Famous Security Bug6Michael S
25 Mar 24 i     i i i  +* Re: A Famous Security Bug4bart
25 Mar 24 i     i i i  i`* Re: A Famous Security Bug3David Brown
25 Mar 24 i     i i i  i `* Re: A Famous Security Bug2Malcolm McLean
25 Mar 24 i     i i i  i  `- Re: A Famous Security Bug1Michael S
25 Mar 24 i     i i i  `- Re: A Famous Security Bug1David Brown
25 Mar 24 i     i i `* Re: A Famous Security Bug15David Brown
25 Mar 24 i     i i  `* Re: A Famous Security Bug14Michael S
25 Mar 24 i     i i   `* Re: A Famous Security Bug13David Brown
25 Mar 24 i     i i    +* Re: A Famous Security Bug3Michael S
25 Mar 24 i     i i    i+- Re: A Famous Security Bug1David Brown
25 Mar 24 i     i i    i`- Re: A Famous Security Bug1bart
25 Mar 24 i     i i    `* Re: A Famous Security Bug9bart
25 Mar 24 i     i i     +* Re: A Famous Security Bug7Michael S
25 Mar 24 i     i i     i`* Re: A Famous Security Bug6bart
25 Mar 24 i     i i     i +- Re: A Famous Security Bug1David Brown
25 Mar 24 i     i i     i `* Re: A Famous Security Bug4Michael S
25 Mar 24 i     i i     i  `* Re: A Famous Security Bug3bart
26 Mar 24 i     i i     i   `* Re: A Famous Security Bug2Michael S
26 Mar 24 i     i i     i    `- Re: A Famous Security Bug1bart
25 Mar 24 i     i i     `- Re: A Famous Security Bug1David Brown
24 Mar 24 i     i `* Re: A Famous Security Bug6Michael S
24 Mar 24 i     i  `* Re: A Famous Security Bug5bart
25 Mar 24 i     i   +* Re: A Famous Security Bug2Michael S
25 Mar 24 i     i   i`- Re: A Famous Security Bug1Michael S
25 Mar 24 i     i   +- Re: A Famous Security Bug1David Brown
28 Mar 24 i     i   `- Re: A Famous Security Bug1James Kuyper
23 Mar 24 i     +- Re: A Famous Security Bug1Tim Rentsch
24 Mar 24 i     +- Re: A Famous Security Bug1Michael S
24 Mar 24 i     +* Re: A Famous Security Bug3Michael S
28 Mar 24 i     `- Re: A Famous Security Bug1James Kuyper
20 Mar 24 +- Re: A Famous Security Bug1Joerg Mertens
20 Mar 24 +* Re: A Famous Security Bug5Chris M. Thomasson
27 Mar 24 `* Re: A Famous Security Bug3Stefan Ram

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