diff options
| author |   Enzo Matsumiya <ematsumiya@suse.de> | 2022-05-18 13:31:55 -0300 |
|---|---|---|
| committer |   Steve French <stfrench@microsoft.com> | 2022-05-20 17:38:11 -0500 |
| commit | 421ef3d56513b2ff02e563623688cb6ab4977c4f (patch) | |
| tree | 3361895b5e36cba14e2a467f99a5327331cf836e /fs/cifs | |
| parent | cifs: fix signed integer overflow when fl_end is OFFSET_MAX (diff) | |
| download | linux-dev-421ef3d56513b2ff02e563623688cb6ab4977c4f.tar.xz linux-dev-421ef3d56513b2ff02e563623688cb6ab4977c4f.zip | |
cifs: don't call cifs_dfs_query_info_nonascii_quirk() if nodfs was set
Also return EOPNOTSUPP if path is remote but nodfs was set.
Fixes: a2809d0e1696 ("cifs: quirk for STATUS_OBJECT_NAME_INVALID returned for non-ASCII dfs refs")
Cc: stable@vger.kernel.org
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Enzo Matsumiya <ematsumiya@suse.de>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/connect.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 42e14f408856..0505d7782e42 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -3432,6 +3432,7 @@ static int is_path_remote(struct mount_ctx *mnt_ctx) struct cifs_tcon *tcon = mnt_ctx->tcon; struct smb3_fs_context *ctx = mnt_ctx->fs_ctx; char *full_path; + bool nodfs = cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS; if (!server->ops->is_path_accessible) return -EOPNOTSUPP; @@ -3449,14 +3450,20 @@ static int is_path_remote(struct mount_ctx *mnt_ctx) rc = server->ops->is_path_accessible(xid, tcon, cifs_sb, full_path); #ifdef CONFIG_CIFS_DFS_UPCALL + if (nodfs) { + if (rc == -EREMOTE) + rc = -EOPNOTSUPP; + goto out; + } + + /* path *might* exist with non-ASCII characters in DFS root + * try again with full path (only if nodfs is not set) */ if (rc == -ENOENT && is_tcon_dfs(tcon)) rc = cifs_dfs_query_info_nonascii_quirk(xid, tcon, cifs_sb, full_path); #endif - if (rc != 0 && rc != -EREMOTE) { - kfree(full_path); - return rc; - } + if (rc != 0 && rc != -EREMOTE) + goto out; if (rc != -EREMOTE) { rc = cifs_are_all_path_components_accessible(server, xid, tcon, @@ -3468,6 +3475,7 @@ static int is_path_remote(struct mount_ctx *mnt_ctx) } } +out: kfree(full_path); return rc; } |