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: 26+ 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 03/26] serial: 8250_omap: Fix sleeping function called from invalid context during probe 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 05/26] RDMA/cm: Add missing locking around id.state in cm_dup_req_handler 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 08/26] drm/tegra: dc: Release PM and RGB output when client's registration fails Sasha Levin
2020-04-11 23:13 ` [PATCH AUTOSEL 4.9 09/26] net/mlx5e: Init ethtool steering for representors 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 23:13 ` [PATCH AUTOSEL 4.9 12/26] RDMA/rxe: Fix configuration of atomic queue pair attributes 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 ` [PATCH AUTOSEL 4.9 14/26] crypto: tcrypt - fix printed skcipher [a]sync mode Sasha Levin
2020-04-11 23:14 ` [PATCH AUTOSEL 4.9 15/26] drm/omap: fix possible object reference leak Sasha Levin
2020-04-11 23:14 ` [PATCH AUTOSEL 4.9 16/26] audit: CONFIG_CHANGE don't log internal bookkeeping as an event Sasha Levin
2020-04-11 23:14 ` [PATCH AUTOSEL 4.9 17/26] Bluetooth: btusb: Add support for 13d3:3548 Realtek 8822CE device Sasha Levin
2020-04-11 23:14 ` [PATCH AUTOSEL 4.9 18/26] scsi: lpfc: Fix RQ buffer leakage when no IOCBs available 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 21/26] RDMA/cm: Update num_paths in cma_resolve_iboe_route error flow Sasha Levin
2020-04-11 23:14 ` [PATCH AUTOSEL 4.9 22/26] ASoC: Intel: Skylake: Enable codec wakeup during chip init Sasha Levin
2020-04-11 23:14 ` [PATCH AUTOSEL 4.9 23/26] dmaengine: stm32-dma: use reset controller only at probe time Sasha Levin
2020-04-11 23:14 ` [PATCH AUTOSEL 4.9 24/26] scsi: ufs: Fix ufshcd_hold() caused scheduling while atomic Sasha Levin
2020-04-11 23:14 ` [PATCH AUTOSEL 4.9 25/26] ext4: check for non-zero journal inum in ext4_calculate_overhead 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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