On 09/25/2018 01:27 PM, Tong Zhang wrote:
Kernel Version: 4.18.5 Problem Description: search_binary_handler() should be called after setting bprm using prepare_binprm(), and in prepare_binprm(), there’s a LSM hook security_bprm_set_creds(), which can make a decision that binfmt cares. We found a leaking path In fs/binfmt_misc.c:235, that don’t ask LSM’s decision.
Do you mean the MISC_FMT_CREDENTIALS case? That looks intentional to me, as noted in the comment there, and as per Documentation/admin-guide/binfmt-misc.rst's discussion of the credentials flag.
