From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Qiujun Huang <hqjagain@gmail.com>,
syzbot+4496e82090657320efc6@syzkaller.appspotmail.com,
Hillf Danton <hdanton@sina.com>,
Marcel Holtmann <marcel@holtmann.org>,
Sasha Levin <sashal@kernel.org>,
linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.9 19/26] Bluetooth: RFCOMM: fix ODEBUG bug in rfcomm_dev_ioctl
Date: Sat, 11 Apr 2020 19:14:06 -0400 [thread overview]
Message-ID: <20200411231413.26911-19-sashal@kernel.org> (raw)
In-Reply-To: <20200411231413.26911-1-sashal@kernel.org>
From: Qiujun Huang <hqjagain@gmail.com>
[ Upstream commit 71811cac8532b2387b3414f7cd8fe9e497482864 ]
Needn't call 'rfcomm_dlc_put' here, because 'rfcomm_dlc_exists' didn't
increase dlc->refcnt.
Reported-by: syzbot+4496e82090657320efc6@syzkaller.appspotmail.com
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
Suggested-by: Hillf Danton <hdanton@sina.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/bluetooth/rfcomm/tty.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index 2f2cb5e27cdd4..a8c63ef75f73c 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -413,10 +413,8 @@ static int __rfcomm_create_dev(struct sock *sk, void __user *arg)
dlc = rfcomm_dlc_exists(&req.src, &req.dst, req.channel);
if (IS_ERR(dlc))
return PTR_ERR(dlc);
- else if (dlc) {
- rfcomm_dlc_put(dlc);
+ if (dlc)
return -EBUSY;
- }
dlc = rfcomm_dlc_alloc(GFP_KERNEL);
if (!dlc)
return -ENOMEM;
--
2.20.1
next prev parent reply other threads:[~2020-04-11 23:17 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-11 23:13 [PATCH AUTOSEL 4.9 01/26] net: wan: wanxl: use allow to pass CROSS_COMPILE_M68k for rebuilding firmware Sasha Levin
2020-04-11 23:13 ` [PATCH AUTOSEL 4.9 02/26] net: phy: probe PHY drivers synchronously Sasha Levin
2020-04-11 23:13 ` [PATCH AUTOSEL 4.9 04/26] net: phy: mscc: accept all RGMII species in vsc85xx_mac_if_set Sasha Levin
2020-04-11 23:13 ` [PATCH AUTOSEL 4.9 06/26] mwifiex: set needed_headroom, not hard_header_len Sasha Levin
2020-04-11 23:13 ` [PATCH AUTOSEL 4.9 07/26] Bluetooth: L2CAP: handle l2cap config request during open state Sasha Levin
2020-04-11 23:13 ` [PATCH AUTOSEL 4.9 09/26] net/mlx5e: Init ethtool steering for representors Sasha Levin
2020-04-12 7:10 ` Or Gerlitz
2020-04-12 17:59 ` Jakub Kicinski
2020-04-12 18:29 ` Or Gerlitz
2020-04-14 1:56 ` Sasha Levin
2020-04-14 7:16 ` Leon Romanovsky
2020-04-14 10:22 ` Or Gerlitz
2020-04-14 11:09 ` Greg KH
2020-04-14 14:38 ` Or Gerlitz
2020-04-14 15:16 ` Sasha Levin
2020-04-14 15:49 ` Edward Cree
2020-04-14 17:37 ` Leon Romanovsky
2020-04-14 19:03 ` Jakub Kicinski
2020-04-14 21:00 ` Sasha Levin
2020-04-14 22:50 ` Michal Kubecek
2020-04-15 5:31 ` Leon Romanovsky
2020-04-15 14:07 ` Sasha Levin
2020-04-14 20:57 ` Sasha Levin
2020-04-15 16:18 ` Edward Cree
2020-04-16 0:00 ` Sasha Levin
2020-04-16 4:08 ` Saeed Mahameed
2020-04-16 5:24 ` Leon Romanovsky
2020-04-16 13:30 ` Sasha Levin
2020-04-16 19:07 ` Saeed Mahameed
2020-04-16 19:58 ` Sasha Levin
2020-04-16 21:08 ` Saeed Mahameed
2020-04-17 8:28 ` gregkh
2020-04-17 22:23 ` Saeed Mahameed
2020-04-18 10:51 ` gregkh
2020-04-17 13:21 ` Sasha Levin
2020-04-17 22:38 ` Saeed Mahameed
2020-04-16 13:40 ` Or Gerlitz
2020-04-16 14:04 ` Sasha Levin
2020-04-16 14:17 ` Or Gerlitz
2020-04-16 14:36 ` Sasha Levin
2020-04-16 17:20 ` Greg KH
2020-04-16 19:31 ` Saeed Mahameed
2020-04-16 19:53 ` Sasha Levin
2020-04-16 21:32 ` Saeed Mahameed
2020-04-16 23:23 ` Sasha Levin
2020-04-21 3:07 ` Saeed Mahameed
2020-04-16 20:08 ` Jakub Kicinski
2020-04-16 21:11 ` Saeed Mahameed
2020-04-17 8:25 ` gregkh
2020-04-16 16:06 ` Edward Cree
2020-04-16 18:49 ` Sasha Levin
2020-04-20 11:45 ` Edward Cree
2020-04-20 12:53 ` Sasha Levin
2020-04-11 23:13 ` [PATCH AUTOSEL 4.9 10/26] Bluetooth: Fix calculation of SCO handle for packet processing Sasha Levin
2020-04-11 23:13 ` [PATCH AUTOSEL 4.9 11/26] Bluetooth: guard against controllers sending zero'd events Sasha Levin
2020-04-11 23:14 ` [PATCH AUTOSEL 4.9 13/26] net: intel: e1000e: fix possible sleep-in-atomic-context bugs in e1000e_get_hw_semaphore() Sasha Levin
2020-04-11 23:14 ` Sasha Levin [this message]
2020-04-11 23:14 ` [PATCH AUTOSEL 4.9 20/26] brcmfmac: Fix driver crash on USB control transfer timeout Sasha Levin
2020-04-11 23:14 ` [PATCH AUTOSEL 4.9 26/26] svcrdma: Fix leak of transport addresses Sasha Levin
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