[PATCH] fix use-after-free in ide_unregister()

29e9689d · Bartlomiej Zolnierkiewicz · Linus Torvalds · c0eeedbb · 29e9689d
Commit 29e9689d authored Jun 23, 2003 by Bartlomiej Zolnierkiewicz Committed by Linus Torvalds Jun 23, 2003
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drivers/ide/ide.c drivers/ide/ide.c +1 -1

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--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -673,8 +673,8 @@ void ide_unregister (unsigned int index)
 		blk_cleanup_queue(&drive->queue);
 	}
 	if (hwif->next == hwif) {
-		kfree(hwgroup);
 		BUG_ON(hwgroup->hwif != hwif);
+		kfree(hwgroup);
 	} else {
 		/* There is another interface in hwgroup.
 		 * Unlink us, and set hwgroup->drive and ->hwif to