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authorWenwen Wang <wenwen@cs.uga.edu>2019-08-16 00:08:27 -0500
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-09-02 23:17:22 +0200
commit03d1571d9513369c17e6848476763ebbd10ec2cb (patch)
tree296fde035b930983a1e68cee556d6dfd30e16f4c /drivers/acpi
parent5c7ed4385424b1c2ce0c27c41448e080e44ebb09 (diff)
downloadlinux-03d1571d9513369c17e6848476763ebbd10ec2cb.tar.bz2
ACPI: custom_method: fix memory leaks
In cm_write(), 'buf' is allocated through kzalloc(). In the following execution, if an error occurs, 'buf' is not deallocated, leading to memory leaks. To fix this issue, free 'buf' before returning the error. Fixes: 526b4af47f44 ("ACPI: Split out custom_method functionality into an own driver") Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/custom_method.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/acpi/custom_method.c b/drivers/acpi/custom_method.c
index b2ef4c2ec955..fd66a736621c 100644
--- a/drivers/acpi/custom_method.c
+++ b/drivers/acpi/custom_method.c
@@ -49,8 +49,10 @@ static ssize_t cm_write(struct file *file, const char __user * user_buf,
if ((*ppos > max_size) ||
(*ppos + count > max_size) ||
(*ppos + count < count) ||
- (count > uncopied_bytes))
+ (count > uncopied_bytes)) {
+ kfree(buf);
return -EINVAL;
+ }
if (copy_from_user(buf + (*ppos), user_buf, count)) {
kfree(buf);
@@ -70,6 +72,7 @@ static ssize_t cm_write(struct file *file, const char __user * user_buf,
add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
}
+ kfree(buf);
return count;
}