Commit 6b9140f3 authored Dec 22, 2015 by Sasha Levin Committed by Sebastian Reichel Jan 07, 2016

power: test_power: correctly handle empty writes



Writing 0 length data into test_power makes it access an invalid array
location and kill the system.

Fixes: f17ef9b2 ("power: Make test_power driver more dynamic.")
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

parent 127d2868

drivers/power/test_power.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -301,6 +301,8 @@ static int map_get_value(struct battery_property_map map, const char key,
		buf[MAX_KEYLENGTH-1] = '\0';

		cr = strnlen(buf, MAX_KEYLENGTH) - 1;
		if (cr < 0)
		return def_val;
		if (buf[cr] == '\n')
		buf[cr] = '\0';