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util:datablob: avoid non-transitive comparison in data_blob_cmp()

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BUG: https://bugzilla.samba.org/show_bug.cgi?id=15625

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit e1519c3667)
This commit is contained in:
Douglas Bagnall 2024-04-04 11:07:06 +13:00 committed by Jule Anger
parent f7e192e82f
commit 7990f5a284
1 changed files with 3 additions and 2 deletions
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5
lib/util/data_blob.c
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@ -22,6 +22,7 @@
#include "attr.h"
#include "data_blob.h"
#include "lib/util/samba_util.h"
#include "lib/util/tsort.h"
const DATA_BLOB data_blob_null = { NULL, 0 };
@ -121,12 +122,12 @@ _PUBLIC_ int data_blob_cmp(const DATA_BLOB *d1, const DATA_BLOB *d2)
return 1;
}
if (d1->data == d2->data) {
return d1->length - d2->length;
return NUMERIC_CMP(d1->length, d2->length);
}
ret = memcmp(d1->data, d2->data, MIN(d1->length, d2->length));
if (ret == 0) {
/* Note this ordering is used in conditional aces */
return d1->length - d2->length;
return NUMERIC_CMP(d1->length, d2->length);
}
return ret;
}