In the cm_write() function, memory is allocated,
and at the end of the function when uncopied_bytes is 0,
the memory is freed. If uncopied_bytes is not equal to 0,
a memory leak occurs.
Signed-off-by: shiqiang.deng <shiqiang.deng213@xxxxxxxxx>
---
drivers/acpi/custom_method.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/acpi/custom_method.c b/drivers/acpi/custom_method.c
index d39a9b474727..5103c7c3a6ce 100644
--- a/drivers/acpi/custom_method.c
+++ b/drivers/acpi/custom_method.c
@@ -77,6 +77,9 @@ static ssize_t cm_write(struct file *file, const char __user *user_buf,
if (ACPI_FAILURE(status))
return -EINVAL;
add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
+ } else {
+ kfree(buf);
+ buf = NULL;
}
return count;
--
2.30.0
