From: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Date: Thu, 26 Jan 2023 11:23:18 +0100
Subject: [PATCH] fuse: add inode/permission checks to
fileattr_get/fileattr_set
References: bsc#1012628
Patch-mainline: 6.2.3
Git-commit: 1cc4606d19e3710bfab3f6704b87ff9580493c69
commit 1cc4606d19e3710bfab3f6704b87ff9580493c69 upstream.
It looks like these checks were accidentally lost during the conversion to
fileattr API.
Fixes: 72227eac177d ("fuse: convert to fileattr")
Cc: <stable@vger.kernel.org> # v5.13
Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
fs/fuse/ioctl.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/fuse/ioctl.c b/fs/fuse/ioctl.c
index fcce94ac..8ba1545e 100644
--- a/fs/fuse/ioctl.c
+++ b/fs/fuse/ioctl.c
@@ -419,6 +419,12 @@ static struct fuse_file *fuse_priv_ioctl_prepare(struct inode *inode)
struct fuse_mount *fm = get_fuse_mount(inode);
bool isdir = S_ISDIR(inode->i_mode);
+ if (!fuse_allow_current_process(fm->fc))
+ return ERR_PTR(-EACCES);
+
+ if (fuse_is_bad(inode))
+ return ERR_PTR(-EIO);
+
if (!S_ISREG(inode->i_mode) && !isdir)
return ERR_PTR(-ENOTTY);
--
2.35.3