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authorEric W. Biederman <ebiederm@xmission.com>2020-05-31 15:02:36 -0500
committerEric W. Biederman <ebiederm@xmission.com>2020-05-31 15:02:36 -0500
commit3977e285ee89a94699255dbbf6eeea13889a1083 (patch)
tree378ea4452668d448b0834fd08008a5f81619f1fd /arch/alpha/kernel
parente32f8879019535b899bc3d51f371e17526f208d1 (diff)
parent56305aa9b6fab91a5555a45796b79c1b0a6353d1 (diff)
downloadlinux-stericsson-3977e285ee89a94699255dbbf6eeea13889a1083.tar.gz
exec: Remove the recomputation of bprm->cred
Recomputing the uids, gids, capabilities, and related flags each time a new bprm->file is set is error prone and unnecessary. This set of changes splits per_clear temporarily into two separate variables. This is the last change necessary to ensure that everything that is computed from brpm->file in bprm->cred is recomputed every time a new bprm->file is set. Then the code is refactored to compute bprm->cred from bprm->file when the final brpm->file is known, removing the need for recomputation entirely. Doing this in two steps should allow anyone who has problems later to bisect and tell if it was the semantic change or the refactoring that caused them problems. Eric W. Biederman (2): exec: Add a per bprm->file version of per_clear exec: Compute file based creds only once fs/binfmt_misc.c | 2 +- fs/exec.c | 57 ++++++++++++++++++------------------------- include/linux/binfmts.h | 9 ++----- include/linux/lsm_hook_defs.h | 2 +- include/linux/lsm_hooks.h | 22 +++++++++-------- include/linux/security.h | 9 ++++--- security/commoncap.c | 22 +++++++++-------- security/security.c | 4 +-- 8 files changed, 59 insertions(+), 68 deletions(-) Merge branch 'exec-norecompute-v2' into exec-next
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