git: 36226163fa48 - main - x86: Mark the trapframe as initialized in ipi_bitmap_handler()
Mark Johnston
markj at FreeBSD.org
Sat Jul 10 00:48:11 UTC 2021
The branch main has been updated by markj:
URL: https://cgit.FreeBSD.org/src/commit/?id=36226163fa48ee2c5f73bd2e870ce2e5a057f42e
commit 36226163fa48ee2c5f73bd2e870ce2e5a057f42e
Author: Mark Johnston <markj at FreeBSD.org>
AuthorDate: 2021-07-10 00:38:18 +0000
Commit: Mark Johnston <markj at FreeBSD.org>
CommitDate: 2021-07-10 00:38:50 +0000
x86: Mark the trapframe as initialized in ipi_bitmap_handler()
Otherwise KASAN may generate false positives if the trapframe was
written into a poisoned region of the stack.
Reported by: pho
Reported by: syzbot+ee60455cd58e6eed20c9 at syzkaller.appspotmail.com
Reported by: syzbot+be5f9df26426ace3a00c at syzkaller.appspotmail.com
Sponsored by: The FreeBSD Foundation
---
sys/x86/x86/mp_x86.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/sys/x86/x86/mp_x86.c b/sys/x86/x86/mp_x86.c
index 2dcdf923c467..1f22b3a7886a 100644
--- a/sys/x86/x86/mp_x86.c
+++ b/sys/x86/x86/mp_x86.c
@@ -41,6 +41,7 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
+#include <sys/asan.h>
#include <sys/bus.h>
#include <sys/cons.h> /* cngetc() */
#include <sys/cpuset.h>
@@ -1279,6 +1280,8 @@ ipi_bitmap_handler(struct trapframe frame)
int cpu = PCPU_GET(cpuid);
u_int ipi_bitmap;
+ kasan_mark(&frame, sizeof(frame), sizeof(frame), 0);
+
td = curthread;
ipi_bitmap = atomic_readandclear_int(&cpuid_to_pcpu[cpu]->
pc_ipi_bitmap);
More information about the dev-commits-src-all
mailing list