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s3:winbind: Fix possible NULL pointer dereference

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BUG: https://bugzilla.samba.org/show_bug.cgi?id=14921
BUG: https://bugzilla.redhat.com/show_bug.cgi?id=2019888

Signed-off-by: Andreas Schneider <asn@samba.org>
Rewiewed-by: Jeremy Allison <jra@samba.org>
(cherry picked from commit cbf312f02bc86f9325fb89f6f5441bc61fd3974f)

Autobuild-User(v4-15-test): Jule Anger <janger@samba.org>
Autobuild-Date(v4-15-test): Thu Dec  2 11:38:42 UTC 2021 on sn-devel-184
This commit is contained in:
Andreas Schneider 2021-11-23 15:48:57 +01:00 committed by Jule Anger
parent 9aa03f402b
commit dc59b39211
1 changed files with 3 additions and 0 deletions
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3
source3/winbindd/winbindd_util.c
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@ -1784,6 +1784,9 @@ char *fill_domain_username_talloc(TALLOC_CTX *mem_ctx,
}
tmp_user = talloc_strdup(mem_ctx, user);
if (tmp_user == NULL) {
return NULL;
}
if (!strlower_m(tmp_user)) {
TALLOC_FREE(tmp_user);
return NULL;