From: Navid Emamdoost <navid.emamdoost@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: emamd001@umn.edu, smccaman@umn.edu, kjlu@umn.edu,
Navid Emamdoost <navid.emamdoost@gmail.com>,
Josef Bacik <josef@toxicpanda.com>, Jens Axboe <axboe@kernel.dk>,
linux-block@vger.kernel.org, nbd@other.debian.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] nbd: prevent memory leak
Date: Mon, 23 Sep 2019 15:09:58 -0500 [thread overview]
Message-ID: <20190923200959.29643-1-navid.emamdoost@gmail.com> (raw)
In nbd_add_socket when krealloc succeeds, if nsock's allocation fail the
reallocted memory is leak. The correct behaviour should be assigning the
reallocted memory to config->socks right after success.
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
---
drivers/block/nbd.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index a8e3815295fe..8ae3bd2e7b30 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -987,14 +987,15 @@ static int nbd_add_socket(struct nbd_device *nbd, unsigned long arg,
sockfd_put(sock);
return -ENOMEM;
}
+
+ config->socks = socks;
+
nsock = kzalloc(sizeof(struct nbd_sock), GFP_KERNEL);
if (!nsock) {
sockfd_put(sock);
return -ENOMEM;
}
- config->socks = socks;
-
nsock->fallback_index = -1;
nsock->dead = false;
mutex_init(&nsock->tx_lock);
--
2.17.1
next reply other threads:[~2019-09-23 20:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-23 20:09 Navid Emamdoost [this message]
2019-11-21 18:24 ` [PATCH] nbd: prevent memory leak Navid Emamdoost
2019-11-21 18:30 ` Josef Bacik
2019-11-21 18:37 ` Jens Axboe
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