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| author | Eric W. Biederman <ebiederm@xmission.com> | 2020-05-14 19:53:44 +0200 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2020-05-21 17:16:50 +0200 |
| commit | 112b7147592e8f46bd1da4f961773e6d974f38a8 (patch) | |
| tree | 78da2d713b0bc074b1e7b9c77738e52e6aa2da75 /security/security.c | |
| parent | exec: Factor security_bprm_creds_for_exec out of security_bprm_set_creds (diff) | |
| download | linux-112b7147592e8f46bd1da4f961773e6d974f38a8.tar.xz linux-112b7147592e8f46bd1da4f961773e6d974f38a8.zip | |
exec: Convert security_bprm_set_creds into security_bprm_repopulate_creds
Rename bprm->cap_elevated to bprm->active_secureexec and initialize it
in prepare_binprm instead of in cap_bprm_set_creds. Initializing
bprm->active_secureexec in prepare_binprm allows multiple
implementations of security_bprm_repopulate_creds to play nicely with
each other.
Rename security_bprm_set_creds to security_bprm_reopulate_creds to
emphasize that this path recomputes part of bprm->cred. This
recomputation avoids the time of check vs time of use problems that
are inherent in unix #! interpreters.
In short two renames and a move in the location of initializing
bprm->active_secureexec.
Link: https://lkml.kernel.org/r/87o8qkzrxp.fsf_-_@x220.int.ebiederm.org
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'security/security.c')
| -rw-r--r-- | security/security.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/security/security.c b/security/security.c index 4ee76a729f73..b890b7e2a765 100644 --- a/security/security.c +++ b/security/security.c @@ -828,9 +828,9 @@ int security_bprm_creds_for_exec(struct linux_binprm *bprm) return call_int_hook(bprm_creds_for_exec, 0, bprm); } -int security_bprm_set_creds(struct linux_binprm *bprm) +int security_bprm_repopulate_creds(struct linux_binprm *bprm) { - return call_int_hook(bprm_set_creds, 0, bprm); + return call_int_hook(bprm_repopulate_creds, 0, bprm); } int security_bprm_check(struct linux_binprm *bprm) |