diff options
| author | Jan Kara <jack@suse.cz> | 2016-10-04 13:44:06 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-28 03:01:34 -0400 |
| commit | 74005674c821250b16fd2ed291588fffbdfee262 (patch) | |
| tree | 123ed6c46777a9d0f8049c8e6bc385caae5dc6b0 /fs | |
| parent | 76fd38eae33765b92aefa73aaf6cca3f22a3faa3 (diff) | |
isofs: Do not return EACCES for unknown filesystems
commit a2ed0b391dd9c3ef1d64c7c3e370f4a5ffcd324a upstream.
When isofs_mount() is called to mount a device read-write, it returns
EACCES even before it checks that the device actually contains an isofs
filesystem. This may confuse mount(8) which then tries to mount all
subsequent filesystem types in read-only mode.
Fix the problem by returning EACCES only once we verify that the device
indeed contains an iso9660 filesystem.
Fixes: 17b7f7cf58926844e1dd40f5eb5348d481deca6a
Reported-by: Kent Overstreet <kent.overstreet@gmail.com>
Reported-by: Karel Zak <kzak@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/isofs/inode.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c index d67a16f2a45d..350f67fb5b9c 100644 --- a/fs/isofs/inode.c +++ b/fs/isofs/inode.c @@ -690,6 +690,11 @@ static int isofs_fill_super(struct super_block *s, void *data, int silent) pri_bh = NULL; root_found: + /* We don't support read-write mounts */ + if (!(s->s_flags & MS_RDONLY)) { + error = -EACCES; + goto out_freebh; + } if (joliet_level && (pri == NULL || !opt.rock)) { /* This is the case of Joliet with the norock mount flag. @@ -1503,9 +1508,6 @@ struct inode *__isofs_iget(struct super_block *sb, static struct dentry *isofs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { - /* We don't support read-write mounts */ - if (!(flags & MS_RDONLY)) - return ERR_PTR(-EACCES); return mount_bdev(fs_type, flags, dev_name, data, isofs_fill_super); } |