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kern: Ensure that thread-local KMSAN state is available

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Sponsored by:	The FreeBSD Foundation
This commit is contained in:
Mark Johnston 2021-08-10 20:58:00 -04:00
parent a422084abb
commit 5dda15adbc
2 changed files with 5 additions and 0 deletions
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2
sys/kern/kern_fork.c
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@ -55,6 +55,7 @@ __FBSDID("$FreeBSD$");
#include <sys/sysctl.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/msan.h>
#include <sys/mutex.h>
#include <sys/priv.h>
#include <sys/proc.h>
@ -958,6 +959,7 @@ fork1(struct thread *td, struct fork_req *fr)
}
proc_linkup(newproc, td2);
} else {
kmsan_thread_alloc(td2);
if (td2->td_kstack == 0 || td2->td_kstack_pages != pages) {
if (td2->td_kstack != 0)
vm_thread_dispose(td2);

3
sys/kern/kern_thread.c
View file

@ -38,6 +38,7 @@ __FBSDID("$FreeBSD$");
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/msan.h>
#include <sys/mutex.h>
#include <sys/proc.h>
#include <sys/bitstring.h>
@ -761,6 +762,7 @@ thread_alloc(int pages)
return (NULL);
}
td->td_tid = tid;
kmsan_thread_alloc(td);
cpu_thread_alloc(td);
EVENTHANDLER_DIRECT_INVOKE(thread_ctor, td);
return (td);
@ -797,6 +799,7 @@ thread_free_batched(struct thread *td)
* Freeing handled by the caller.
*/
td->td_tid = -1;
kmsan_thread_free(td);
uma_zfree(thread_zone, td);
}