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From: Andriy Gapon <avg@FreeBSD.org>
Date: Tue, 11 Sep 2012 07:15:12 +0000 (UTC)
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Subject: svn commit: r240349 - head/sys/boot/zfs
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Author: avg
Date: Tue Sep 11 07:15:11 2012
New Revision: 240349
URL: http://svn.freebsd.org/changeset/base/240349

Log:
  zfs boot: add a size check for a value in fzap_lookup
  
  MFC after:	25 days

Modified:
  head/sys/boot/zfs/zfsimpl.c

Modified: head/sys/boot/zfs/zfsimpl.c
==============================================================================
--- head/sys/boot/zfs/zfsimpl.c	Tue Sep 11 07:13:58 2012	(r240348)
+++ head/sys/boot/zfs/zfsimpl.c	Tue Sep 11 07:15:11 2012	(r240349)
@@ -1355,6 +1355,8 @@ fzap_lookup(const spa_t *spa, const dnod
 		zc = &ZAP_LEAF_CHUNK(&zl, zc->l_entry.le_next);
 	}
 	if (fzap_name_equal(&zl, zc, name)) {
+		if (zc->l_entry.le_value_intlen * zc->l_entry.le_value_numints > 8)
+			return (E2BIG);
 		*value = fzap_leaf_value(&zl, zc);
 		return (0);
 	}