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Found by Covscan.
"Error: INTEGER_OVERFLOW (CWE-190):
samba-4.20.0rc2/source4/dsdb/schema/schema_query.c:403: tainted_data_argument: The check ""i < new_len"" contains the tainted expression ""i"" which causes ""new_len"" to be considered tainted.
samba-4.20.0rc2/source4/dsdb/schema/schema_query.c:407: overflow: The expression ""new_len - i"" is deemed underflowed because at least one of its arguments has underflowed.
samba-4.20.0rc2/source4/dsdb/schema/schema_query.c:407: overflow: The expression ""(new_len - i) * 8UL"" is deemed underflowed because at least one of its arguments has underflowed.
samba-4.20.0rc2/source4/dsdb/schema/schema_query.c:407: overflow_sink: ""(new_len - i) * 8UL"", which might have underflowed, is passed to ""memmove(val1, val2, (new_len - i) * 8UL)"". [Note: The source code implementation of the function has been overridden by a builtin model.]
405| const char **val2 = &attr_list[i];
406| if (ldb_attr_cmp(*val1, *val2) == 0) {
407|-> memmove(val1, val2, (new_len - i) * sizeof( *attr_list));
408| attr_list[new_len-1] = NULL;
409| new_len--;"
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Signed-off-by: Martin Schwenke <mschwenke@ddn.com>
In the unlikely event that strlen(str) > INT_MAX, the result could
have overflowed.
This is not a sort transitivity issue, as this is not a symmetric sort
comparison, but it would affect binary search reliability.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This looks up a schema attribute by its CN, similar to
dsdb_class_by_cn_ldb_val().
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
lib/util/safe_string.h is similar to source3/include/safe_string.h, but
the former has fewer checks. It is missing bcopy, strcasecmp, and
strncasecmp.
Add the missing elements to lib/util/safe_string.h remove the other
safe_string.h which is in the source3-specific path. To accomodate
existing uses of str(n?)casecmp, add #undef lines to source files where
they are used.
Signed-off-by: Matthew DeVore <matvore@google.com>
Reviewed-by: David Mulder <dmulder@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Fri Aug 28 02:18:40 UTC 2020 on sn-devel-184
The callers moved to dsdb_class_by_cn_ldb_val() with
43aa546ecc3f05845793b1a7354685d50a77c170 in 2009.
Found by callcatcher
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
We were calling str_list_length(new_attrs) three times when one is
enough.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Do only require the out memory context and build the temporary one in
the body of the function. This greatly simplifies the callers.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
As shown in commit c8e6d8b487 this looks easier and in any case we can
treat schema context data like global data.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
This allows it to be useful for the dbchecker utility in respect to
object class problems.
Fix up the API to only work with standardised LDB "ldb_message_element"
structures which do allow much easier interoperations. As a consequence this
leads to some changes in the objectclass module as well.
O(n) search for dsdb_attribute by msDS-IntId value was
replaced by binary-search in ordered index.
I've choosen the approach of separate index on msDS-IntId values
as I think it is more clear what we are searching for.
And it should little bit faster as we can clearly determine
in which index to perform the search based on ATTID value -
ATTIDs based on prefixMap and ATTIDs based on msDS-IntId
are in separate ranges.
Other way to implement this index was to merge msDS-IntId values
in attributeID_id index.
This led me to a shorted but not so obvious implementation.
Counters which are used in the way "for (i = 0; array[i] != NULL; i++)" I
modified to "unsigned" since for sure we don't want to have negative array
indexes there.
At this point, support for checks on LDAP add, delete, rename and modify.
Old kludge_acl is still there to handle the searches.
This module is synchronous as the async version was impossible to debug,
will be converted to async after some user testing.
This removes a number of cases where we did a cast into a const char *
of an ldb_val. While convention is to alway have an extra \0 at
data[length] in the ldb_val, this is not required, and does not occour
at least on build farm host 'svart'.
Andrew Bartlett
This is all working towards supporting the full WSPP schema without a
major performance penalty.
We now use binary searches when looking up classes and attributes. We
also avoid the loop loading the attributes into ldb, by adding a hook
to override the ldb attribute search function in a module. The
attributes can thus be loaded once, and then saved as part of the
global schema.
Also added support for a few more key attribute syntaxes, as needed
for the full schema.
