diff options
| author | Jan Kara <jack@suse.cz> | 2016-10-04 13:44:06 +0200 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:58:22 +0200 |
| commit | c5fd5703915ef2541d02e6f8648725d5a0541dfd (patch) | |
| tree | 5fe76074ddeba72c951f98924791af1fc67bc69e | |
| parent | 3eef364f71f9792805fd8173e7d9d2e981e13be9 (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: Willy Tarreau <w@1wt.eu>
| -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 5a4d03ca8..2158db211 100644 --- a/fs/isofs/inode.c +++ b/fs/isofs/inode.c @@ -727,6 +727,11 @@ 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. @@ -1539,9 +1544,6 @@ 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); } |