From: Miklos Szeredi <mszeredi@redhat.com>
To: fuse-devel@lists.linux.dev
Cc: John Groves <john@groves.net>,
Amir Goldstein <amir73il@gmail.com>,
"Darrick J . Wong" <djwong@kernel.org>,
Vishal Verma <vishal.l.verma@intel.com>,
Dave Jiang <dave.jiang@intel.com>,
Alison Schofield <alison.schofield@intel.com>,
nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org
Subject: [PATCH v3 2/9] dax: use READ_ONCE() in dax_holder()
Date: Tue, 6 Oct 2026 20:01:07 +0200 [thread overview]
Message-ID: <20261006180115.1425232-3-mszeredi@redhat.com> (raw)
In-Reply-To: <20261006180115.1425232-1-mszeredi@redhat.com>
Make sure that a non-NULL check in callers remains valid even when racing
with fs_put_dax().
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
---
drivers/dax/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 824e1f6df378..0a440f8b42e4 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -677,7 +677,7 @@ EXPORT_SYMBOL_GPL(put_dax);
*/
void *dax_holder(struct dax_device *dax_dev)
{
- return dax_dev->holder_data;
+ return READ_ONCE(dax_dev->holder_data);
}
EXPORT_SYMBOL_GPL(dax_holder);
--
2.54.0
next prev parent reply other threads:[~2026-10-06 18:01 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-06 18:01 [PATCH v3 0/9] fuse: DAX device based extent maps (famfs) Miklos Szeredi
2026-10-06 18:01 ` [PATCH v3 1/9] dax: replace exported dax_dev_get() with non-allocating dax_dev_find() Miklos Szeredi
2026-10-06 18:10 ` sashiko-bot
2026-10-06 18:01 ` Miklos Szeredi [this message]
2026-10-06 18:13 ` [PATCH v3 2/9] dax: use READ_ONCE() in dax_holder() sashiko-bot
2026-10-08 1:02 ` Alison Schofield
2026-10-08 6:58 ` Miklos Szeredi
2026-10-06 18:01 ` [PATCH v3 3/9] fuse: add helpers for EIO return value with kernel message Miklos Szeredi
2026-10-06 21:03 ` Amir Goldstein
2026-10-06 18:01 ` [PATCH v3 4/9] fuse: support 64 bit, server allocated backing ID Miklos Szeredi
2026-10-06 18:20 ` sashiko-bot
2026-10-06 20:10 ` John Groves
2026-10-07 12:49 ` Miklos Szeredi
2026-10-06 22:08 ` Amir Goldstein
2026-10-07 12:54 ` Miklos Szeredi
2026-10-06 18:01 ` [PATCH v3 5/9] fuse: support opening 64 bit " Miklos Szeredi
2026-10-06 18:01 ` [PATCH v3 6/9] fuse: add support for opening dax device as backing Miklos Szeredi
2026-10-06 18:18 ` sashiko-bot
2026-10-06 18:01 ` [PATCH v3 7/9] fuse: add extent map data structure Miklos Szeredi
2026-10-06 18:17 ` sashiko-bot
2026-10-06 18:01 ` [PATCH v3 8/9] fuse: add extent map I/O support Miklos Szeredi
2026-10-06 18:22 ` sashiko-bot
2026-10-06 18:01 ` [PATCH v3 9/9] fuse: add support for striped backing Miklos Szeredi
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