Index: user/pho/stress2/misc/syzkaller15.sh
===================================================================
--- user/pho/stress2/misc/syzkaller15.sh	(nonexistent)
+++ user/pho/stress2/misc/syzkaller15.sh	(revision 362266)
@@ -0,0 +1,191 @@
+#!/bin/sh
+
+
+# panic: sbflush_internal: ccc 0 mb 0 mbcnt 256
+# cpuid = 4
+# time = 1592126385
+# KDB: stack backtrace:
+# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe012b22f8d0
+# vpanic() at vpanic+0x182/frame 0xfffffe012b22f920
+# panic() at panic+0x43/frame 0xfffffe012b22f980
+# sbrelease_internal() at sbrelease_internal+0xbd/frame 0xfffffe012b22f9a0
+# solisten_proto() at solisten_proto+0xab/frame 0xfffffe012b22fa00
+# sctp_listen() at sctp_listen+0x2f4/frame 0xfffffe012b22fa60
+# solisten() at solisten+0x42/frame 0xfffffe012b22fa80
+# kern_listen() at kern_listen+0x7c/frame 0xfffffe012b22fac0
+# ia32_syscall() at ia32_syscall+0x150/frame 0xfffffe012b22fbf0
+# int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0xffffdb10
+# KDB: enter: panic
+# [ thread pid 93263 tid 100202 ]
+# Stopped at      kdb_enter+0x37: movq    $0,0x10c5456(%rip)
+# db> x/s version
+# version:        FreeBSD 13.0-CURRENT #0 r362171: Sun Jun 14 09:06:12 CEST 2020\012    pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO\012
+# db> 
+
+# $FreeBSD$
+
+[ `uname -p` != "amd64" ] && exit 0
+
+. ../default.cfg
+cat > /tmp/syzkaller15.c <<EOF
+// https://syzkaller.appspot.com/bug?id=6b9cfdc1689b0adee1c6f75f56ab034a70500d93
+// autogenerated by syzkaller (https://github.com/google/syzkaller)
+// Reported-by: syzbot+bca42a93f1254ca91e94@syzkaller.appspotmail.com
+
+#define _GNU_SOURCE
+
+#include <sys/types.h>
+
+#include <pwd.h>
+#include <setjmp.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 unsigned long long procid;
+
+static __thread int skip_segv;
+static __thread jmp_buf segv_env;
+
+static void segv_handler(int sig, siginfo_t* info, void* ctx __unused)
+{
+  uintptr_t addr = (uintptr_t)info->si_addr;
+  const uintptr_t prog_start = 1 << 20;
+  const uintptr_t prog_end = 100 << 20;
+  if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) &&
+      (addr < prog_start || addr > prog_end)) {
+    _longjmp(segv_env, 1);
+  }
+  exit(sig);
+}
+
+static void install_segv_handler(void)
+{
+  struct sigaction sa;
+  memset(&sa, 0, sizeof(sa));
+  sa.sa_sigaction = segv_handler;
+  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
+  sigaction(SIGSEGV, &sa, NULL);
+  sigaction(SIGBUS, &sa, NULL);
+}
+
+#define NONFAILING(...)                                                        \
+  {                                                                            \
+    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
+    if (_setjmp(segv_env) == 0) {                                              \
+      __VA_ARGS__;                                                             \
+    }                                                                          \
+    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
+  }
+
+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;
+  for (iter = 0;; 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 < 5 * 1000)
+        continue;
+      kill_and_wait(pid, &status);
+      break;
+    }
+  }
+}
+
+uint64_t r[1] = {0xffffffffffffffff};
+
+void execute_one(void)
+{
+  intptr_t res = 0;
+  res = syscall(SYS_socket, 0x1c, 1, 0x84);
+  if (res != -1)
+    r[0] = res;
+  NONFAILING(*(uint8_t*)0x10000040 = 0xc8);
+  NONFAILING(*(uint8_t*)0x10000041 = 0x51);
+  NONFAILING(*(uint8_t*)0x10000042 = 0);
+  NONFAILING(*(uint8_t*)0x10000043 = 0);
+  NONFAILING(*(uint8_t*)0x10000044 = 0);
+  NONFAILING(*(uint8_t*)0x10000045 = 0);
+  NONFAILING(*(uint8_t*)0x10000046 = 0);
+  NONFAILING(*(uint8_t*)0x10000047 = 0);
+  NONFAILING(*(uint8_t*)0x10000048 = 0);
+  NONFAILING(*(uint8_t*)0x10000049 = 0);
+  NONFAILING(*(uint8_t*)0x1000004a = 0);
+  syscall(SYS_setsockopt, (intptr_t)r[0], 0x84, 0xc, 0x10000040, 0xb);
+  NONFAILING(*(uint8_t*)0x10000180 = 0x5f);
+  NONFAILING(*(uint8_t*)0x10000181 = 0x1c);
+  NONFAILING(*(uint16_t*)0x10000182 = htobe16(0x4e22 + procid * 4));
+  NONFAILING(*(uint32_t*)0x10000184 = 0);
+  NONFAILING(*(uint64_t*)0x10000188 = htobe64(0));
+  NONFAILING(*(uint64_t*)0x10000190 = htobe64(1));
+  NONFAILING(*(uint32_t*)0x10000198 = 0);
+  syscall(SYS_connect, (intptr_t)r[0], 0x10000180, 0x1c);
+  syscall(SYS_listen, (intptr_t)r[0], 7);
+}
+int main(void)
+{
+  syscall(SYS_mmap, 0x10000000, 0x1000000, 7, 0x1012, -1, 0);
+  install_segv_handler();
+  for (procid = 0; procid < 4; procid++) {
+    if (fork() == 0) {
+      loop();
+    }
+  }
+  sleep(1000000);
+  return 0;
+}
+EOF
+mycc -o /tmp/syzkaller15 -Wall -Wextra -O0 -m32 /tmp/syzkaller15.c ||
+    exit 1
+
+(cd /tmp; ./syzkaller15) &
+sleep 60
+pkill -9 syzkaller15
+wait
+
+rm -f /tmp/syzkaller15 /tmp/syzkaller15.c /tmp/syzkaller15.core
+exit 0

Property changes on: user/pho/stress2/misc/syzkaller15.sh
___________________________________________________________________
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property