stress2: Added a syzkaller reproducer

tools/test/stress2/misc/all.exclude

@@ -75,6 +75,7 @@ syzkaller42.sh		WiP								20210613
 syzkaller43.sh		WiP								20210906
 syzkaller46.sh		WiP								20210925
 syzkaller47.sh		WiP								20210925
+syzkaller50.sh		panic: Assertion done != job_total_nbytes failed at ...		20220405
 truss3.sh		WiP								20200915
 unionfs9.sh		https://people.freebsd.org/~pho/stress/log/log0226.txt		20220111
 unionfs14.sh		WiP								20220111

tools/test/stress2/misc/syzkaller50.sh

@@ -0,0 +1,169 @@
+#!/bin/sh
+
+# panic: Assertion done != job_total_nbytes failed at ../../../kern/sys_socket.c:670
+# cpuid = 10
+# time = 1649059964
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe069a27fd70
+# vpanic() at vpanic+0x17f/frame 0xfffffe069a27fdc0
+# panic() at panic+0x43/frame 0xfffffe069a27fe20
+# soaio_process_sb() at soaio_process_sb+0x751/frame 0xfffffe069a27feb0
+# soaio_kproc_loop() at soaio_kproc_loop+0xa9/frame 0xfffffe069a27fef0
+# fork_exit() at fork_exit+0x80/frame 0xfffffe069a27ff30
+# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe069a27ff30
+# --- trap 0xc, rip = 0x36633df4a5ca, rsp = 0x36633cd66d98, rbp = 0x36633cd66db0 ---
+# KDB: enter: panic
+# [ thread pid 36460 tid 546462 ]
+# Stopped at      kdb_enter+0x37: movq    $0,0x127b48e(%rip)
+# db> x/s version
+# version:        FreeBSD 14.0-CURRENT #0 main-n254248-88b3e65fcff2a: Sun Apr  3 11:21:34 CEST 2022\012    pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO\012
+# db>
+
+[ `uname -p` != "amd64" ] && exit 0
+
+. ../default.cfg
+cat > /tmp/syzkaller50.c <<EOF
+// https://syzkaller.appspot.com/bug?id=3d4fdc415d285b4de0dbf5709b4f2bb451a0a382
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+3b4dc5d1d63e9bd01eda@syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <sys/types.h>
+
+#include <pwd.h>
+#include <signal.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 <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+static void kill_and_wait(int pid, int* status)
+{
+  kill(pid, SIGKILL);
+  while (waitpid(-1, status, 0) != pid) {
+  }
+}
+
+static void sleep_ms(uint64_t ms)
+{
+  usleep(ms * 1000);
+}
+
+static uint64_t current_time_ms(void)
+{
+  struct timespec ts;
+  if (clock_gettime(CLOCK_MONOTONIC, &ts))
+    exit(1);
+  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
+}
+
+static void execute_one(void);
+
+#define WAIT_FLAGS 0
+
+static void loop(void)
+{
+  int iter = 0;
+  for (;; iter++) {
+    int pid = fork();
+    if (pid < 0)
+      exit(1);
+    if (pid == 0) {
+      execute_one();
+      exit(0);
+    }
+    int status = 0;
+    uint64_t start = current_time_ms();
+    for (;;) {
+      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
+        break;
+      sleep_ms(1);
+      if (current_time_ms() - start < 5000)
+        continue;
+      kill_and_wait(pid, &status);
+      break;
+    }
+  }
+}
+
+uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
+
+void execute_one(void)
+{
+  intptr_t res = 0;
+  res = syscall(SYS_socket, 0x1cul, 1ul, 0x84);
+  if (res != -1)
+    r[0] = res;
+  *(uint8_t*)0x20000240 = 0x1c;
+  *(uint8_t*)0x20000241 = 0x1c;
+  *(uint16_t*)0x20000242 = htobe16(0x4e23);
+  *(uint32_t*)0x20000244 = 0;
+  *(uint64_t*)0x20000248 = htobe64(0);
+  *(uint64_t*)0x20000250 = htobe64(1);
+  *(uint32_t*)0x20000258 = 0;
+  syscall(SYS_bind, r[0], 0x20000240ul, 0x1cul);
+  *(uint8_t*)0x20000080 = 0x1c;
+  *(uint8_t*)0x20000081 = 0x1c;
+  *(uint16_t*)0x20000082 = htobe16(0x4e23);
+  *(uint32_t*)0x20000084 = 0;
+  *(uint64_t*)0x20000088 = htobe64(0);
+  *(uint64_t*)0x20000090 = htobe64(1);
+  *(uint32_t*)0x20000098 = 0;
+  syscall(SYS_connect, r[0], 0x20000080ul, 0x1cul);
+  *(uint32_t*)0x20000000 = r[0];
+  *(uint64_t*)0x20000008 = 0;
+  *(uint64_t*)0x20000010 = 0x200002c0;
+  *(uint64_t*)0x20000018 = 0;
+  *(uint32_t*)0x20000020 = 0;
+  *(uint32_t*)0x20000024 = 0;
+  *(uint64_t*)0x20000028 = 0;
+  *(uint32_t*)0x20000030 = 0;
+  *(uint32_t*)0x20000034 = 0;
+  *(uint64_t*)0x20000038 = 0;
+  *(uint64_t*)0x20000040 = 0;
+  *(uint64_t*)0x20000048 = 0;
+  *(uint32_t*)0x20000050 = 0;
+  *(uint32_t*)0x20000054 = 0;
+  *(uint32_t*)0x20000058 = 0;
+  *(uint32_t*)0x20000060 = 0;
+  syscall(SYS_aio_write, 0x20000000ul);
+  res = syscall(SYS_fcntl, r[0], 0ul, r[0]);
+  if (res != -1)
+    r[1] = res;
+  *(uint32_t*)0x20001540 = 0;
+  memset((void*)0x20001544, 6, 1);
+  syscall(SYS_setsockopt, r[1], 0x84, 0x901, 0x20001540ul, 8ul);
+}
+int main(void)
+{
+  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
+  loop();
+  return 0;
+}
+EOF
+mycc -o /tmp/syzkaller50 -Wall -Wextra -O0 /tmp/syzkaller50.c || exit 1
+
+kldstat | grep -q sctp   || { kldload sctp.ko && loaded=1; }
+
+(cd ../testcases/swap; ./swap -t 3m -i 10 -l 100) &
+for i in `jot 3`; do
+	(cd /tmp; timeout 3m ./syzkaller50) &
+	pids="$pids $!"
+done
+for pid in $pids; do
+	wait $pid
+done
+while pkill swap; do :; done
+wait
+
+rm -rf /tmp/syzkaller50 syzkaller50.c /tmp/syzkaller.*
+[ $loaded ] && kldunload sctp.ko
+exit 0