diff options
| author | Muchun Song <songmuchun@bytedance.com> | 2021-11-09 05:35:19 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-09 21:02:52 +0300 |
| commit | 10a6de19cad6efb9b49883513afb810dc265fca2 (patch) | |
| tree | 93b0a4fb9d9673da36571766bdc69731a5b3d468 | |
| parent | 372904c080be44629d84bb15ed5e12eed44b5f9f (diff) | |
| download | linux-10a6de19cad6efb9b49883513afb810dc265fca2.tar.xz | |
seq_file: fix passing wrong private data
DEFINE_PROC_SHOW_ATTRIBUTE() is supposed to be used to define a series
of functions and variables to register proc file easily. And the users
can use proc_create_data() to pass their own private data and get it
via seq->private in the callback. Unfortunately, the proc file system
use PDE_DATA() to get private data instead of inode->i_private. So fix
it. Fortunately, there only one user of it which does not pass any
private data, so this bug does not break any in-tree codes.
Link: https://lkml.kernel.org/r/20211029032638.84884-1-songmuchun@bytedance.com
Fixes: 97a32539b956 ("proc: convert everything to "struct proc_ops"")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Florent Revest <revest@chromium.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/seq_file.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h index 103776e18555..72dbb44a4573 100644 --- a/include/linux/seq_file.h +++ b/include/linux/seq_file.h @@ -209,7 +209,7 @@ static const struct file_operations __name ## _fops = { \ #define DEFINE_PROC_SHOW_ATTRIBUTE(__name) \ static int __name ## _open(struct inode *inode, struct file *file) \ { \ - return single_open(file, __name ## _show, inode->i_private); \ + return single_open(file, __name ## _show, PDE_DATA(inode)); \ } \ \ static const struct proc_ops __name ## _proc_ops = { \ |