From d52c499b476b2f82eebecdd5fc4be8318a4e8ef7 Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Date: Sat, 22 Dec 2018 01:39:52 -0600
Subject: [PATCH] lightnvm: pblk: fix use-after-free bug
Remove one of the calls to function bio_put(), so *bio* is only
freed once.
Notice that bio is being dereferenced in bio_put(), hence leading to
a use-after-free bug once *bio* has already been freed.
Addresses-Coverity-ID: 1475952 ("Use after free")
Fixes: 55d8ec35398e ("lightnvm: pblk: support packed metadata")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
drivers/lightnvm/pblk-recovery.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/lightnvm/pblk-recovery.c b/drivers/lightnvm/pblk-recovery.c
index 3fcf062d752c..5ee20da7bdb3 100644
--- a/drivers/lightnvm/pblk-recovery.c
+++ b/drivers/lightnvm/pblk-recovery.c
@@ -418,7 +418,6 @@ retry_rq:
if (ret) {
pblk_err(pblk, "I/O submission failed: %d\n", ret);
bio_put(bio);
- bio_put(bio);
return ret;
}