From: Pavel Skripkin <paskripkin@gmail.com>
To: stefan@datenfreihafen.org, alex.aring@gmail.com,
davem@davemloft.net, kuba@kernel.org
Cc: linux-wpan@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org,
Pavel Skripkin <paskripkin@gmail.com>,
syzbot+28a246747e0a465127f3@syzkaller.appspotmail.com
Subject: [PATCH] drivers: net: fix memory leak in atusb_probe
Date: Thu, 1 Apr 2021 07:46:24 +0300 [thread overview]
Message-ID: <20210401044624.19017-1-paskripkin@gmail.com> (raw)
syzbot reported memory leak in atusb_probe()[1].
The problem was in atusb_alloc_urbs().
Since urb is anchored, we need to release the reference
to correctly free the urb
backtrace:
[<ffffffff82ba0466>] kmalloc include/linux/slab.h:559 [inline]
[<ffffffff82ba0466>] usb_alloc_urb+0x66/0xe0 drivers/usb/core/urb.c:74
[<ffffffff82ad3888>] atusb_alloc_urbs drivers/net/ieee802154/atusb.c:362 [inline][2]
[<ffffffff82ad3888>] atusb_probe+0x158/0x820 drivers/net/ieee802154/atusb.c:1038 [1]
Reported-by: syzbot+28a246747e0a465127f3@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
---
drivers/net/ieee802154/atusb.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/ieee802154/atusb.c b/drivers/net/ieee802154/atusb.c
index 0dd0ba915ab9..23ee0b14cbfa 100644
--- a/drivers/net/ieee802154/atusb.c
+++ b/drivers/net/ieee802154/atusb.c
@@ -365,6 +365,7 @@ static int atusb_alloc_urbs(struct atusb *atusb, int n)
return -ENOMEM;
}
usb_anchor_urb(urb, &atusb->idle_urbs);
+ usb_free_urb(urb);
n--;
}
return 0;
--
2.30.2
next reply other threads:[~2021-04-01 4:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-01 4:46 Pavel Skripkin [this message]
2021-04-01 22:50 ` [PATCH] drivers: net: fix memory leak in atusb_probe patchwork-bot+netdevbpf
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