This is a note to let you know that I've just added the patch titled
b43: fix debugfs crash
to the 4.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
b43-fix-debugfs-crash.patch
and it can be found in the queue-4.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>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
From: Christian Lamparter <chunkeey@xxxxxxxxxxxxxx>
commit 51b275a6fe5601834b717351d6cbdb89bd1f308b upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/broadcom/b43/debugfs.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- 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 f
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
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;
Patches currently in stable-queue which might be from chunkeey@xxxxxxxxxxxxxx are
queue-4.7/b43-fix-debugfs-crash.patch
queue-4.7/carl9170-fix-debugfs-crashes.patch
queue-4.7/b43legacy-fix-debugfs-crash.patch
queue-4.7/debugfs-introduce-a-public-file_operations-accessor.patch
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