linux-kernel - [PATCH] libata: Fix a memory leak bug

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Date:   Fri, 16 Aug 2019 22:58:29 -0500
From:   Wenwen Wang <wenwen@...uga.edu>
To:     Wenwen Wang <wenwen@...uga.edu>
Cc:     Jens Axboe <axboe@...nel.dk>,
        linux-ide@...r.kernel.org (open list:LIBATA SUBSYSTEM (Serial and
        Parallel ATA drivers)), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] libata: Fix a memory leak bug

In ata_init(), 'ata_force_tbl' is allocated through kcalloc() in
ata_parse_force_param(). However, it is not deallocated if
ata_attach_transport() fails, leading to a memory leak bug. To fix this
issue, free 'ata_force_tbl' before go to the 'err_out' label.

Signed-off-by: Wenwen Wang <wenwen@...uga.edu>
---
 drivers/ata/libata-core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 28c492b..185dd69 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -7040,6 +7040,7 @@ static int __init ata_init(void)
 	ata_scsi_transport_template = ata_attach_transport();
 	if (!ata_scsi_transport_template) {
 		ata_sff_exit();
+		kfree(ata_force_tbl);
 		rc = -ENOMEM;
 		goto err_out;
 	}
-- 
2.7.4