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| author |   Sasha Levin <sasha.levin@oracle.com> | 2015-12-22 12:43:36 -0500 |
|---|---|---|
| committer |   Sebastian Reichel <sre@kernel.org> | 2016-01-07 18:39:34 +0100 |
| commit | 6b9140f39c2aaf76791197fbab0839c0e4af56e8 (patch) | |
| tree | 0d8362c26a0c895f0b7f463ecba6a98806e2fe69 /drivers/power | |
| parent | power: generic-adc-battery: use to_delayed_work (diff) | |
| download | linux-dev-6b9140f39c2aaf76791197fbab0839c0e4af56e8.tar.xz linux-dev-6b9140f39c2aaf76791197fbab0839c0e4af56e8.zip | |
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: f17ef9b2d ("power: Make test_power driver more dynamic.")
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/test_power.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/power/test_power.c b/drivers/power/test_power.c index 83c42ea88f2b..57246cdbd042 100644 --- a/drivers/power/test_power.c +++ b/drivers/power/test_power.c @@ -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'; |