Buffer size warning from a compiler in string functions

Description

Hey,

There are some warning from a compiler and they make me worried. A warning about a possible overflow when doing memcpy() in string handling functions never looks safe.

[100%] Building C object src/CMakeFiles/bro.dir/nb_dns.c.o
In file included from /usr/include/string.h:494:0,
from /home/clear/rpmbuild/BUILD/bro-2.5.9271b2032/src/3rdparty/sqlite3.c:12705:
In function ‘memcpy’,
inlined from ‘vdbePmaReadBlob.part.172’ at /home/clear/rpmbuild/BUILD/bro-2.5.9271b2032/src/3rdparty/sqlite3.c:88351:5,
inlined from ‘vdbePmaReadBlob’,
inlined from ‘vdbePmaReadVarint.part.173’ at /home/clear/rpmbuild/BUILD/bro-2.5.9271b2032/src/3rdparty/sqlite3.c:88394:12,
inlined from ‘vdbePmaReadVarint’,
inlined from ‘vdbePmaReaderInit.constprop’ at /home/clear/rpmbuild/BUILD/bro-2.5.9271b2032/src/3rdparty/sqlite3.c:88542:8,
inlined from ‘vdbeMergeEngineLevel0’ at /home/clear/rpmbuild/BUILD/bro-2.5.9271b2032/src/3rdparty/sqlite3.c:90110:8,
inlined from ‘vdbeSorterMergeTreeBuild’ at /home/clear/rpmbuild/BUILD/bro-2.5.9271b2032/src/3rdparty/sqlite3.c:90245:14,
inlined from ‘vdbeSorterSetupMerge’ at /home/clear/rpmbuild/BUILD/bro-2.5.9271b2032/src/3rdparty/sqlite3.c:90298:6,
inlined from ‘sqlite3VdbeSorterRewind.isra.333’ at /home/clear/rpmbuild/BUILD/bro-2.5.9271b2032/src/3rdparty/sqlite3.c:90404:8,
inlined from ‘sqlite3VdbeExec’ at /home/clear/rpmbuild/BUILD/bro-2.5.9271b2032/src/3rdparty/sqlite3.c:84972:8:
/usr/include/bits/string_fortified.h:34:10: warning: ‘__builtin_memcpy’: specified size between 18446744071562067968 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
return _builtin_memcpy_chk (_dest, __src, __len, _bos0 (_dest));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[100%] Linking CXX executable bro

Environment

None

Assignee

Unassigned

Reporter

Michał Purzyński

Labels

None

External issue ID

None

Components

Fix versions

Affects versions

Priority

High
Configure