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From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 29/29] of_property command: Fix crash with empty property value
Date: Tue, 26 Feb 2013 21:18:56 +0100	[thread overview]
Message-ID: <1361909936-2665-30-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1361909936-2665-1-git-send-email-s.hauer@pengutronix.de>

the of_property command crashes when an empty property value
was given. This is because xrealloc is called with a length
argument of 0. Fix this.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 commands/of_property.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/commands/of_property.c b/commands/of_property.c
index 5d35bb4..6311b70 100644
--- a/commands/of_property.c
+++ b/commands/of_property.c
@@ -254,9 +254,15 @@ static int do_of_property(int argc, char *argv[])
 
 		if (pp) {
 			free(pp->value);
+
 			/* limit property data to the actual size */
-			data = xrealloc(data, len);
-			pp->value = data;
+			if (len) {
+				pp->value = xrealloc(data, len);
+			} else {
+				pp->value = NULL;
+				free(data);
+			}
+
 			pp->length = len;
 		} else {
 			pp = of_new_property(node, propname, data, len);
-- 
1.7.10.4


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      parent reply	other threads:[~2013-02-26 20:19 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-26 20:18 [PATCH] remove libfdt Sascha Hauer
2013-02-26 20:18 ` [PATCH 01/29] of: unflatten: allocate root node explicitly Sascha Hauer
2013-02-26 20:18 ` [PATCH 02/29] of: export of_find_child Sascha Hauer
2013-02-26 20:18 ` [PATCH 03/29] of: removed unused variables Sascha Hauer
2013-02-26 20:18 ` [PATCH 04/29] of: Let of_find_node_by_path iterate over tree Sascha Hauer
2013-02-26 20:18 ` [PATCH 05/29] of: remove allnodes list Sascha Hauer
2013-02-26 20:18 ` [PATCH 06/29] ARM bootm: Use of_get_fixed_tree Sascha Hauer
2013-02-26 20:18 ` [PATCH 07/29] of: Add of_set_property and of_create_node Sascha Hauer
2013-02-26 20:18 ` [PATCH 08/29] of_node command: use of_create_node Sascha Hauer
2013-02-26 20:18 ` [PATCH 09/29] of: Add root node argument to of_find_node_by_path Sascha Hauer
2013-02-26 20:18 ` [PATCH 10/29] of: Add missing prototype for of_device_is_compatible Sascha Hauer
2013-02-26 20:18 ` [PATCH 11/29] of: let of_unflatten_dtb return the unflattened tree Sascha Hauer
2013-02-26 20:18 ` [PATCH 12/29] of: make unflatten independent of libfdt Sascha Hauer
2013-02-26 20:18 ` [PATCH 13/29] of: make flatten " Sascha Hauer
2013-02-26 21:05   ` Alexander Aring
2013-02-27  8:40     ` Sascha Hauer
2013-02-27 19:52       ` Alexander Aring
2013-02-26 20:18 ` [PATCH 14/29] of/fdt: use optimized endianess conversion Sascha Hauer
2013-02-26 20:18 ` [PATCH 15/29] oftree command: Use of_print_nodes Sascha Hauer
2013-02-26 20:18 ` [PATCH 16/29] of: move OFTREE Kconfig option to drivers/of/ Sascha Hauer
2013-02-26 20:18 ` [PATCH 17/29] of: make OFDEVICE a user selectable option Sascha Hauer
2013-02-26 20:18 ` [PATCH 18/29] oftree command: retire CMD_OFTREE_PROBE Kconfig option Sascha Hauer
2013-02-26 20:18 ` [PATCH 19/29] of: move oftree Kconfig to the top of the drivers menu Sascha Hauer
2013-02-26 20:18 ` [PATCH 20/29] of: Pass barebox internal format devicetree to of_get_fixed_tree Sascha Hauer
2013-02-26 20:18 ` [PATCH 21/29] bootm: Use of_print_nodes instead of fdt_print Sascha Hauer
2013-02-26 20:18 ` [PATCH 22/29] of: move flat devicetree functions to separate file Sascha Hauer
2013-02-26 20:18 ` [PATCH 23/29] of: Add of property write functions for u32 Sascha Hauer
2013-02-26 20:18 ` [PATCH 24/29] of: make value of property in of_new_property optional Sascha Hauer
2013-02-26 20:18 ` [PATCH 25/29] of: Add missing prototype for size/address counting functions Sascha Hauer
2013-02-26 20:18 ` [PATCH 26/29] of: fixup unflattened devicetree Sascha Hauer
2013-02-26 20:18 ` [PATCH 27/29] of: remove unused libfdt Sascha Hauer
2013-02-26 20:18 ` [PATCH 28/29] of_* commands: print usage when insufficient arguments are given Sascha Hauer
2013-02-26 20:18 ` Sascha Hauer [this message]

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