linux-kernel - [PATCH net v2 1/5] ptp: vmclock: Add .owner to vmclock_miscdev

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Message-Id: <20250207-vmclock-probe-v2-1-bc2fce0bdf07@linutronix.de>
Date: Fri, 07 Feb 2025 10:39:02 +0100
From: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
To: David Woodhouse <dwmw2@...radead.org>, 
 Richard Cochran <richardcochran@...il.com>, 
 Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: Mateusz Polchlopek <mateusz.polchlopek@...el.com>, 
 David Woodhouse <dwmw@...zon.co.uk>, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>, 
 stable@...r.kernel.org
Subject: [PATCH net v2 1/5] ptp: vmclock: Add .owner to
 vmclock_miscdev_fops

From: David Woodhouse <dwmw@...zon.co.uk>

Without the .owner field, the module can be unloaded while /dev/vmclock0
is open, leading to an oops.

Fixes: 205032724226 ("ptp: Add support for the AMZNC10C 'vmclock' device")
Cc: stable@...r.kernel.org
Signed-off-by: David Woodhouse <dwmw@...zon.co.uk>
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
---
 drivers/ptp/ptp_vmclock.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/ptp/ptp_vmclock.c b/drivers/ptp/ptp_vmclock.c
index 0a2cfc8ad3c5408a87fd8fedeff274ab895de3dd..dbc73e5382935dcbc799ea608b87f5ff51044ebc 100644
--- a/drivers/ptp/ptp_vmclock.c
+++ b/drivers/ptp/ptp_vmclock.c
@@ -414,6 +414,7 @@ static ssize_t vmclock_miscdev_read(struct file *fp, char __user *buf,
 }

 static const struct file_operations vmclock_miscdev_fops = {
+	.owner = THIS_MODULE,
 	.mmap = vmclock_miscdev_mmap,
 	.read = vmclock_miscdev_read,
 };

-- 
2.48.1