svn commit: r368484 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Wed Dec  9 09:53:21 2020
New Revision: 368484
URL: https://svnweb.freebsd.org/changeset/base/368484

Log:
  Added a syzkaller reproducer.

Added:
  user/pho/stress2/misc/syzkaller30.sh   (contents, props changed)

Added: user/pho/stress2/misc/syzkaller30.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/syzkaller30.sh	Wed Dec  9 09:53:21 2020	(r368484)
@@ -0,0 +1,69 @@
+#!/bin/sh
+
+# panic: sched_pickcpu: Failed to find a cpu.
+# cpuid = 1
+# time = 1607419071
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe01bb640770
+# vpanic() at vpanic+0x181/frame 0xfffffe01bb6407c0
+# panic() at panic+0x43/frame 0xfffffe01bb640820
+# sched_pickcpu() at sched_pickcpu+0x4a2/frame 0xfffffe01bb6408d0
+# sched_add() at sched_add+0x5d/frame 0xfffffe01bb640900
+# setrunnable() at setrunnable+0x77/frame 0xfffffe01bb640930
+# wakeup_one() at wakeup_one+0x1d/frame 0xfffffe01bb640950
+# do_lock_umutex() at do_lock_umutex+0x64c/frame 0xfffffe01bb640a40
+# __umtx_op_wait_umutex() at __umtx_op_wait_umutex+0x49/frame 0xfffffe01bb640a80
+# sys__umtx_op() at sys__umtx_op+0x7a/frame 0xfffffe01bb640ac0
+# amd64_syscall() at amd64_syscall+0x147/frame 0xfffffe01bb640bf0
+# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe01bb640bf0
+# --- syscall (454, FreeBSD ELF64, sys__umtx_op), rip = 0x800254a8c, rsp = 0x7fffdf3f7e88, rbp = 0x7fffdf3f7eb0 ---
+# KDB: enter: panic
+# [ thread pid 58597 tid 106100 ]
+# Stopped at      kdb_enter+0x37: movq    $0,0x10a7766(%rip)
+# db> x/s version
+# version: FreeBSD 13.0-CURRENT #0 r368405: Mon Dec  7 10:33:35 CET 2020
+# pho at t2.osted.lan:/usr/src/sys/amd64/compile/PHO
+# db>
+
+# $FreeBSD$
+
+[ `uname -p` != "amd64" ] && exit 0
+
+# Fixed by r368462
+
+. ../default.cfg
+cat > /tmp/syzkaller30.c <<EOF
+// https://syzkaller.appspot.com/bug?id=6652adb41773e5c471c98342fefcbfb041af9ac8
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+4e3b1009de98d2fabcda at syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <pwd.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/endian.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+int main(void)
+{
+  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+
+  *(uint64_t*)0x200000c0 = 0;
+  syscall(SYS_cpuset_setaffinity, 2ul, 2ul, 0x100000000000000ul, 0x20ul,
+          0x200000c0ul);
+  return 0;
+}
+EOF
+mycc -o /tmp/syzkaller30 -Wall -Wextra -O0 /tmp/syzkaller30.c ||
+    exit 1
+
+(cd /tmp; timeout 3m ./syzkaller30)
+
+rm -rf /tmp/syzkaller30 syzkaller30.c /tmp/syzkaller.*
+exit 0