The patch titled
fuse: fix allowing operations
has been removed from the -mm tree. Its filename was
fuse-fix-allowing-operations.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: fuse: fix allowing operations
From: Miklos Szeredi <mszeredi@xxxxxxx>
The following operation didn't check if sending the request was allowed:
setattr
listxattr
statfs
Some other operations don't explicitly do the check, but VFS calls
->permission() which checks this.
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/fuse/dir.c | 8 +++++++-
fs/fuse/fuse_i.h | 5 +++++
fs/fuse/inode.c | 5 +++++
3 files changed, 17 insertions(+), 1 deletion(-)
diff -puN fs/fuse/dir.c~fuse-fix-allowing-operations fs/fuse/dir.c
--- a/fs/fuse/dir.c~fuse-fix-allowing-operations
+++ a/fs/fuse/dir.c
@@ -721,7 +721,7 @@ static int fuse_refresh_attributes(struc
* for which the owner of the mount has ptrace privilege. This
* excludes processes started by other users, suid or sgid processes.
*/
-static int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task)
+int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task)
{
if (fc->flags & FUSE_ALLOW_OTHER)
return 1;
@@ -1005,6 +1005,9 @@ static int fuse_setattr(struct dentry *e
struct fuse_attr_out outarg;
int err;
+ if (!fuse_allow_task(fc, current))
+ return -EACCES;
+
if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
err = inode_change_ok(inode, attr);
if (err)
@@ -1172,6 +1175,9 @@ static ssize_t fuse_listxattr(struct den
struct fuse_getxattr_out outarg;
ssize_t ret;
+ if (!fuse_allow_task(fc, current))
+ return -EACCES;
+
if (fc->no_listxattr)
return -EOPNOTSUPP;
diff -puN fs/fuse/fuse_i.h~fuse-fix-allowing-operations fs/fuse/fuse_i.h
--- a/fs/fuse/fuse_i.h~fuse-fix-allowing-operations
+++ a/fs/fuse/fuse_i.h
@@ -565,3 +565,8 @@ void fuse_ctl_remove_conn(struct fuse_co
* Is file type valid?
*/
int fuse_valid_type(int m);
+
+/**
+ * Is task allowed to perform filesystem operation?
+ */
+int fuse_allow_task(struct fuse_conn *fc, struct task_struct *task);
diff -puN fs/fuse/inode.c~fuse-fix-allowing-operations fs/fuse/inode.c
--- a/fs/fuse/inode.c~fuse-fix-allowing-operations
+++ a/fs/fuse/inode.c
@@ -287,6 +287,11 @@ static int fuse_statfs(struct dentry *de
struct fuse_statfs_out outarg;
int err;
+ if (!fuse_allow_task(fc, current)) {
+ buf->f_type = FUSE_SUPER_MAGIC;
+ return 0;
+ }
+
req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
_
Patches currently in -mm which might be from mszeredi@xxxxxxx are
origin.patch
unprivileged-mounts-add-user-mounts-to-the-kernel.patch
unprivileged-mounts-allow-unprivileged-umount.patch
unprivileged-mounts-account-user-mounts.patch
unprivileged-mounts-propagate-error-values-from-clone_mnt.patch
unprivileged-mounts-allow-unprivileged-bind-mounts.patch
unprivileged-mounts-put-declaration-of-put_filesystem-in-fsh.patch
unprivileged-mounts-allow-unprivileged-mounts.patch
unprivileged-mounts-allow-unprivileged-mounts-fix-subtype-handling.patch
unprivileged-mounts-allow-unprivileged-fuse-mounts.patch
unprivileged-mounts-propagation-inherit-owner-from-parent.patch
unprivileged-mounts-propagation-inherit-owner-from-parent-fix-for-git-audit.patch
unprivileged-mounts-add-no-submounts-flag.patch
r-o-bind-mounts-sys_mknodat-elevate-write-count-for-vfs_mknod-create-fix.patch
slab-api-remove-useless-ctor-parameter-and-reorder-parameters-vs-revoke.patch
fs-introduce-write_begin-write_end-and-perform_write-aops-revoke-fix.patch
-
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