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kern_exec.c: Add execve_nosetid() helper

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Reviewed by:	dchagin
Tested by:	trasz
MFC after:	1 week
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D28154
This commit is contained in:
Konstantin Belousov 2021-01-14 15:36:15 +02:00
parent 66e73ce737
commit 19e6043a44
1 changed files with 11 additions and 5 deletions
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16
sys/kern/kern_exec.c
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@ -355,6 +355,16 @@ kern_execve(struct thread *td, struct image_args *args, struct mac *mac_p,
return (do_execve(td, args, mac_p, oldvmspace));
}
static void
execve_nosetid(struct image_params *imgp)
{
imgp->credential_setid = false;
if (imgp->newcred != NULL) {
crfree(imgp->newcred);
imgp->newcred = NULL;
}
}
/*
* In-kernel implementation of execve(). All arguments are assumed to be
* userspace pointers from the passed thread.
@ -643,11 +653,7 @@ interpret:
vput(newtextvp);
vm_object_deallocate(imgp->object);
imgp->object = NULL;
imgp->credential_setid = false;
if (imgp->newcred != NULL) {
crfree(imgp->newcred);
imgp->newcred = NULL;
}
execve_nosetid(imgp);
imgp->execpath = NULL;
free(imgp->freepath, M_TEMP);
imgp->freepath = NULL;