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Message-Id: <20250609-sysfs-const-bin_attr-hv-v1-1-bfed20083800@weissschuh.net>
Date: Mon, 09 Jun 2025 13:05:44 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: "K. Y. Srinivasan" <kys@...rosoft.com>,
Haiyang Zhang <haiyangz@...rosoft.com>, Wei Liu <wei.liu@...nel.org>,
Dexuan Cui <decui@...rosoft.com>
Cc: linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH] drivers: hv: Constify 'struct bin_attribute'
The sysfs core now allows instances of 'struct bin_attribute' to be
moved into read-only memory. Make use of that to protect them against
accidental or malicious modifications.
Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
drivers/hv/vmbus_drv.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 33b524b4eb5ef89d0111442a34d39874f02f0b70..38d2775dbe8730fd223d21188519b5f2b72e0804 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -1845,7 +1845,7 @@ static int hv_mmap_ring_buffer_wrapper(struct file *filp, struct kobject *kobj,
return channel->mmap_ring_buffer(channel, vma);
}
-static struct bin_attribute chan_attr_ring_buffer = {
+static const struct bin_attribute chan_attr_ring_buffer = {
.attr = {
.name = "ring",
.mode = 0600,
@@ -1871,7 +1871,7 @@ static struct attribute *vmbus_chan_attrs[] = {
NULL
};
-static const struct bin_attribute *vmbus_chan_bin_attrs[] = {
+static const struct bin_attribute *const vmbus_chan_bin_attrs[] = {
&chan_attr_ring_buffer,
NULL
};
---
base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
change-id: 20250609-sysfs-const-bin_attr-hv-135c9e53b325
Best regards,
--
Thomas Weißschuh <linux@...ssschuh.net>
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