This is a note to let you know that I've just added the patch titled
tracefs: Have new files inherit the ownership of their parent
to the 4.14-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:
tracefs-have-new-files-inherit-the-ownership-of-their-parent.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ee7f3666995d8537dec17b1d35425f28877671a9 Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx>
Date: Wed, 8 Dec 2021 07:57:20 -0500
Subject: tracefs: Have new files inherit the ownership of their parent
From: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
commit ee7f3666995d8537dec17b1d35425f28877671a9 upstream.
If directories in tracefs have their ownership changed, then any new files
and directories that are created under those directories should inherit
the ownership of the director they are created in.
Link: https://lkml.kernel.org/r/20211208075720.4855d180@xxxxxxxxxxxxxxxxxx
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Yabin Cui <yabinc@xxxxxxxxxx>
Cc: Christian Brauner <christian.brauner@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 4282d60689d4f ("tracefs: Add new tracefs file system")
Reported-by: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
Reported: https://lore.kernel.org/all/CAC_TJve8MMAv+H_NdLSJXZUSoxOEq2zB_pVaJ9p=7H6Bu3X76g@xxxxxxxxxxxxxx/
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/tracefs/inode.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/fs/tracefs/inode.c
+++ b/fs/tracefs/inode.c
@@ -409,6 +409,8 @@ struct dentry *tracefs_create_file(const
inode->i_mode = mode;
inode->i_fop = fops ? fops : &tracefs_file_operations;
inode->i_private = data;
+ inode->i_uid = d_inode(dentry->d_parent)->i_uid;
+ inode->i_gid = d_inode(dentry->d_parent)->i_gid;
d_instantiate(dentry, inode);
fsnotify_create(dentry->d_parent->d_inode, dentry);
return end_creating(dentry);
@@ -431,6 +433,8 @@ static struct dentry *__create_dir(const
inode->i_mode = S_IFDIR | S_IRWXU | S_IRUSR| S_IRGRP | S_IXUSR | S_IXGRP;
inode->i_op = ops;
inode->i_fop = &simple_dir_operations;
+ inode->i_uid = d_inode(dentry->d_parent)->i_uid;
+ inode->i_gid = d_inode(dentry->d_parent)->i_gid;
/* directory inodes start off with i_nlink == 2 (for "." entry) */
inc_nlink(inode);
Patches currently in stable-queue which might be from rostedt@xxxxxxxxxxx are
queue-4.14/tracefs-have-new-files-inherit-the-ownership-of-their-parent.patch
