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authorColin Ian King <colin.king@canonical.com>2017-01-20 16:25:06 +0300
committerSebastian Reichel <sre@kernel.org>2017-01-21 05:35:07 +0300
commita1b94355ea3fde5e13db7ff37c0272fcde4e29b2 (patch)
tree2bfdd9249f4fb528a7dca06648403d4204568721 /drivers/power
parentcb190af290329c281ed2fbaf41ce6e4686b69922 (diff)
downloadlinux-a1b94355ea3fde5e13db7ff37c0272fcde4e29b2.tar.xz
power: supply: bq2415x: check for NULL acpi_id to avoid null pointer dereference
acpi_match_device can potentially return NULL, so it is prudent to check if acpi_id is null before it is dereferenced. Add a check and an error message to indicate the failure. Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Pali Rohár <pali.rohar@gmail.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/supply/bq2415x_charger.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/power/supply/bq2415x_charger.c b/drivers/power/supply/bq2415x_charger.c
index 73e2f0b79dd4..c4770a94cc8e 100644
--- a/drivers/power/supply/bq2415x_charger.c
+++ b/drivers/power/supply/bq2415x_charger.c
@@ -1569,6 +1569,11 @@ static int bq2415x_probe(struct i2c_client *client,
acpi_id =
acpi_match_device(client->dev.driver->acpi_match_table,
&client->dev);
+ if (!acpi_id) {
+ dev_err(&client->dev, "failed to match device name\n");
+ ret = -ENODEV;
+ goto error_1;
+ }
name = kasprintf(GFP_KERNEL, "%s-%d", acpi_id->id, num);
}
if (!name) {