This is a note to let you know that I've just added the patch titled
b43: fix debugfs crash
to my driver-core git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core.git
in the driver-core-next branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will also be merged in the next major kernel release
during the merge window.
If you have any questions about this process, please let me know.
>From 51b275a6fe5601834b717351d6cbdb89bd1f308b Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@xxxxxxxxxxxxxx>
Date: Sat, 17 Sep 2016 21:43:03 +0200
Subject: b43: fix debugfs crash
This patch fixes a crash that happens because b43's
debugfs code expects file->f_op to be a pointer to
its own b43_debugfs_fops struct. This is no longer
the case since commit 9fd4dcece43a
("debugfs: prevent access to possibly dead file_operations at file open")
Reviewed-by: Nicolai Stange <nicstange@xxxxxxxxx>
Signed-off-by: Christian Lamparter <chunkeey@xxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx> # 4.7+
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/broadcom/b43/debugfs.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/broadcom/b43/debugfs.c b/drivers/net/wireless/broadcom/b43/debugfs.c
index b4bcd94aff6c..77046384dd80 100644
--- a/drivers/net/wireless/broadcom/b43/debugfs.c
+++ b/drivers/net/wireless/broadcom/b43/debugfs.c
@@ -524,7 +524,8 @@ static ssize_t b43_debugfs_read(struct file *file, char __user *userbuf,
goto out_unlock;
}
- dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
+ dfops = container_of(debugfs_real_fops(file),
+ struct b43_debugfs_fops, fops);
if (!dfops->read) {
err = -ENOSYS;
goto out_unlock;
@@ -585,7 +586,8 @@ static ssize_t b43_debugfs_write(struct file *file,
goto out_unlock;
}
- dfops = container_of(file->f_op, struct b43_debugfs_fops, fops);
+ dfops = container_of(debugfs_real_fops(file),
+ struct b43_debugfs_fops, fops);
if (!dfops->write) {
err = -ENOSYS;
goto out_unlock;
--
2.10.0
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