diff options
| author | Christian Lamparter <chunkeey@googlemail.com> | 2016-09-17 22:43:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-21 13:13:34 +0300 |
| commit | 9c4a45b17e094a090e96beb1138e34c2a10c6b8c (patch) | |
| tree | 55fb1b8792d6f7d59baba421922f3a924d02ea5b /drivers/net/wireless/broadcom | |
| parent | 51b275a6fe5601834b717351d6cbdb89bd1f308b (diff) | |
| download | linux-9c4a45b17e094a090e96beb1138e34c2a10c6b8c.tar.xz | |
b43legacy: fix debugfs crash
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@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Cc: stable <stable@vger.kernel.org> # 4.7+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/wireless/broadcom')
| -rw-r--r-- | drivers/net/wireless/broadcom/b43legacy/debugfs.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/net/wireless/broadcom/b43legacy/debugfs.c b/drivers/net/wireless/broadcom/b43legacy/debugfs.c index 090910ea259e..82ef56ed7ca1 100644 --- 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(struct file *file, char __user *userbuf, 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(struct file *file, 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; |