linux-kernel - [PATCH][next] lightnvm: pblk: fix resource leak of invalid

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Message-Id: <20180605151456.20359-1-colin.king@canonical.com>
Date:   Tue,  5 Jun 2018 16:14:56 +0100
From:   Colin King <colin.king@...onical.com>
To:     Matias Bjorling <mb@...htnvm.io>, linux-block@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] lightnvm: pblk: fix resource leak of invalid_bitmap

From: Colin Ian King <colin.king@...onical.com>

Currently the error exit path when the emeta could not be
interpreted is via fail_free_ws and this fails to free
invalid_bitmap.  Fix this by adding another exit label and
exiting via this to kfree invalid_bitmap.

Detected by CoverityScan, CID#1469659 ("Resource leak")

Fixes: 48b8d20895f8 ("lightnvm: pblk: garbage collect lines with failed writes")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/lightnvm/pblk-gc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/lightnvm/pblk-gc.c b/drivers/lightnvm/pblk-gc.c
index df88f1bdd921..31a0a1b3868b 100644
--- a/drivers/lightnvm/pblk-gc.c
+++ b/drivers/lightnvm/pblk-gc.c
@@ -203,7 +203,7 @@ static void pblk_gc_line_prepare_ws(struct work_struct *work)
 		if (!lba_list) {
 			pr_err("pblk: could not interpret emeta (line %d)\n",
 					line->id);
-			goto fail_free_ws;
+			goto fail_free_invalid_bitmap;
 		}
 	}
 
@@ -280,6 +280,7 @@ static void pblk_gc_line_prepare_ws(struct work_struct *work)
 	kfree(gc_rq);
 fail_free_lba_list:
 	pblk_mfree(lba_list, l_mg->emeta_alloc_type);
+fail_free_invalid_bitmap:
 	kfree(invalid_bitmap);
 fail_free_ws:
 	kfree(line_ws);
-- 
2.17.0