GNU bug report logs - #49209
coreutils: stack out-of-bounds write in tail --follow

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Package: coreutils;

Reported by: Kamil Dudka <kdudka <at> redhat.com>

Date: Thu, 24 Jun 2021 14:27:01 UTC

Severity: normal

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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From: Kamil Dudka <kdudka <at> redhat.com>
To: Pádraig Brady <P <at> draigbrady.com>
Cc: sbroz <at> redhat.com, 49209 <at> debbugs.gnu.org
Subject: bug#49209: coreutils: stack out-of-bounds write in tail --follow
Date: Thu, 24 Jun 2021 17:07:20 +0200

On Thursday, June 24, 2021 4:50:25 PM CEST Pádraig Brady wrote:
> Note the number of descriptors select() is waiting on in independent of the
> number of files. We should be able to inotify_init() earlier in the process
> to avoid this issue. I'll have a look.

Good idea!  This could make it work instead of throwing an error.  
Nevertheless, the boundary check should be added anyway as long as we use 
FD_SET(), because the number of first available file descriptor can still
be controlled from outside.

Kamil
This bug report was last modified 4 years and 19 days ago.

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