mirror of
https://github.com/Ysurac/openmptcprouter.git
synced 2025-03-09 15:40:20 +00:00
Fix RUTX support
This commit is contained in:
parent
6fc4d11e09
commit
0b14e36374
98 changed files with 11611 additions and 893 deletions
|
@ -0,0 +1,48 @@
|
|||
From 05acefb4872dae89e772729efb194af754c877e8 Mon Sep 17 00:00:00 2001
|
||||
From: Miklos Szeredi <mszeredi@redhat.com>
|
||||
Date: Tue, 2 Jun 2020 22:20:26 +0200
|
||||
Subject: ovl: check permission to open real file
|
||||
|
||||
Call inode_permission() on real inode before opening regular file on one of
|
||||
the underlying layers.
|
||||
|
||||
In some cases ovl_permission() already checks access to an underlying file,
|
||||
but it misses the metacopy case, and possibly other ones as well.
|
||||
|
||||
Removing the redundant permission check from ovl_permission() should be
|
||||
considered later.
|
||||
|
||||
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
|
||||
---
|
||||
fs/overlayfs/file.c | 16 ++++++++++++++--
|
||||
1 file changed, 14 insertions(+), 2 deletions(-)
|
||||
|
||||
Index: linux-5.4.147/fs/overlayfs/file.c
|
||||
===================================================================
|
||||
--- linux-5.4.147.orig/fs/overlayfs/file.c
|
||||
+++ linux-5.4.147/fs/overlayfs/file.c
|
||||
@@ -34,10 +34,22 @@ static struct file *ovl_open_realfile(co
|
||||
struct file *realfile;
|
||||
const struct cred *old_cred;
|
||||
int flags = file->f_flags | OVL_OPEN_FLAGS;
|
||||
+ int acc_mode = ACC_MODE(flags);
|
||||
+ int err;
|
||||
+
|
||||
+ if (flags & O_APPEND)
|
||||
+ acc_mode |= MAY_APPEND;
|
||||
|
||||
old_cred = ovl_override_creds(inode->i_sb);
|
||||
- realfile = open_with_fake_path(&file->f_path, flags, realinode,
|
||||
- current_cred());
|
||||
+ err = inode_permission(realinode, MAY_OPEN | acc_mode);
|
||||
+ if (err) {
|
||||
+ realfile = ERR_PTR(err);
|
||||
+ } else if (!inode_owner_or_capable(realinode)) {
|
||||
+ realfile = ERR_PTR(-EPERM);
|
||||
+ } else {
|
||||
+ realfile = open_with_fake_path(&file->f_path, flags, realinode,
|
||||
+ current_cred());
|
||||
+ }
|
||||
revert_creds(old_cred);
|
||||
|
||||
pr_debug("open(%p[%pD2/%c], 0%o) -> (%p, 0%o)\n",
|
Loading…
Add table
Add a link
Reference in a new issue