This is a note to let you know that I've just added the patch titled
b43legacy: 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:
b43legacy-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 9c4a45b17e094a090e96beb1138e34c2a10c6b8c Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@xxxxxxxxxxxxxx>
Date: Sat, 17 Sep 2016 21:43:04 +0200
Subject: b43legacy: fix debugfs crash
From: Christian Lamparter <chunkeey@xxxxxxxxxxxxxx>
commit 9c4a45b17e094a090e96beb1138e34c2a10c6b8c upstream.
This patch fixes a crash that happens because b43legacy's
debugfs code expects file->f_op to be a pointer to its own
b43legacy_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/b43legacy/debugfs.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/net/wireless/broadcom/b43legacy/debugfs.c
+++ b/drivers/net/wireless/broadcom/b43legacy/debugfs.c
@@ -221,7 +221,8 @@ static ssize_t b43legacy_debugfs_read(st
goto out_unlock;
}
- dfops = container_of(file->f_op, struct b43legacy_debugfs_fops, fops);
+ dfops = container_of(debugfs_real_fops(file),
+ struct b43legacy_debugfs_fops, fops);
if (!dfops->read) {
err = -ENOSYS;
goto out_unlock;
@@ -287,7 +288,8 @@ static ssize_t b43legacy_debugfs_write(s
goto out_unlock;
}
- dfops = container_of(file->f_op, struct b43legacy_debugfs_fops, fops);
+ dfops = container_of(debugfs_real_fops(file),
+ struct b43legacy_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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