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From: Andriy Gapon <avg@FreeBSD.org>
Date: Sat, 6 Oct 2012 19:01:32 +0000 (UTC)
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Subject: svn commit: r241275 - stable/8/sys/boot/zfs
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Author: avg
Date: Sat Oct  6 19:01:31 2012
New Revision: 241275
URL: http://svn.freebsd.org/changeset/base/241275

Log:
  MFC r240349: zfs boot: add a size check for a value in fzap_lookup

Modified:
  stable/8/sys/boot/zfs/zfsimpl.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/boot/   (props changed)

Modified: stable/8/sys/boot/zfs/zfsimpl.c
==============================================================================
--- stable/8/sys/boot/zfs/zfsimpl.c	Sat Oct  6 19:01:20 2012	(r241274)
+++ stable/8/sys/boot/zfs/zfsimpl.c	Sat Oct  6 19:01:31 2012	(r241275)
@@ -1289,6 +1289,8 @@ 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);
 	}