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Bug 766838 - Ensure arguments to toupper() has appropriate value range
Ensure arguments to toupper() has appropriate value range
Status: RESOLVED OBSOLETE
Product: libxml2
Classification: Platform
Component: general
git master
Other NetBSD
: Normal normal
: ---
Assigned To: Daniel Veillard
libxml QA maintainers
Depends on:
Blocks:
 
 
Reported: 2016-05-24 13:26 UTC by he
Modified: 2021-07-05 13:25 UTC
See Also:
GNOME target: ---
GNOME version: ---


Attachments
Patch casting toupper() argument values to "unsigned char" (1.63 KB, text/plain)
2016-05-24 13:26 UTC, he
Details

Description he 2016-05-24 13:26:17 UTC
Created attachment 328437 [details]
Patch casting toupper() argument values to "unsigned char"

According to 

http://pubs.opengroup.org/onlinepubs/9699919799/functions/toupper.html

the allowed value range of the toupper() function is the value range
of unsigned char and EOF, with potentially undefined behavior for
other values, such as the lower half of the signed char value range.
Therefore: add casts to unsigned char to these functions to avoid
any potential problems.
Comment 1 GNOME Infrastructure Team 2021-07-05 13:25:18 UTC
GNOME is going to shut down bugzilla.gnome.org in favor of gitlab.gnome.org.
As part of that, we are mass-closing older open tickets in bugzilla.gnome.org
which have not seen updates for a longer time (resources are unfortunately
quite limited so not every ticket can get handled).

If you can still reproduce the situation described in this ticket in a recent
and supported software version, then please follow
  https://wiki.gnome.org/GettingInTouch/BugReportingGuidelines
and create a new ticket at
  https://gitlab.gnome.org/GNOME/libxml2/-/issues/

Thank you for your understanding and your help.