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authorEric W. Biederman <ebiederm@xmission.com>2016-06-27 23:04:06 +0200
committerEric W. Biederman <ebiederm@xmission.com>2016-07-01 01:04:58 +0200
commit0d4d717f25834134bb6f43284f84c8ccee5bbf2a (patch)
treeaa4f4605f45bca718b01483e90835731227ef341 /fs/9p
parentuserns: Handle -1 in k[ug]id_has_mapping when !CONFIG_USER_NS (diff)
downloadlinux-0d4d717f25834134bb6f43284f84c8ccee5bbf2a.tar.xz
linux-0d4d717f25834134bb6f43284f84c8ccee5bbf2a.zip
vfs: Verify acls are valid within superblock's s_user_ns.
Update posix_acl_valid to verify that an acl is within a user namespace. Update the callers of posix_acl_valid to pass in an appropriate user namespace. For posix_acl_xattr_set and v9fs_xattr_set_acl pass in inode->i_sb->s_user_ns to posix_acl_valid. For md_unpack_acl pass in &init_user_ns as no inode or superblock is in sight. Acked-by: Seth Forshee <seth.forshee@canonical.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/9p')
-rw-r--r--fs/9p/acl.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index 0576eaeb60b9..5b6a1743ea17 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -266,7 +266,7 @@ static int v9fs_xattr_set_acl(const struct xattr_handler *handler,
if (IS_ERR(acl))
return PTR_ERR(acl);
else if (acl) {
- retval = posix_acl_valid(acl);
+ retval = posix_acl_valid(inode->i_sb->s_user_ns, acl);
if (retval)
goto err_out;
}