1#!/bin/sh
2
3# panic: Queues are not empty when handling SHUTDOWN-COMPLETE
4# cpuid = 10
5# time = 1650546082
6# KDB: stack backtrace:
7# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00e49be680
8# vpanic() at vpanic+0x17f/frame 0xfffffe00e49be6d0
9# panic() at panic+0x43/frame 0xfffffe00e49be730
10# sctp_handle_shutdown_complete() at sctp_handle_shutdown_complete+0xea/frame 0xfffffe00e49be750
11# sctp_process_control() at sctp_process_control+0x1561/frame 0xfffffe00e49bea90
12# sctp_common_input_processing() at sctp_common_input_processing+0x514/frame 0xfffffe00e49bec00
13# sctp6_input_with_port() at sctp6_input_with_port+0x228/frame 0xfffffe00e49becf0
14# sctp6_input() at sctp6_input+0xb/frame 0xfffffe00e49bed00
15# ip6_input() at ip6_input+0xc2f/frame 0xfffffe00e49bede0
16# swi_net() at swi_net+0x191/frame 0xfffffe00e49bee60
17# ithread_loop() at ithread_loop+0x279/frame 0xfffffe00e49beef0
18# fork_exit() at fork_exit+0x80/frame 0xfffffe00e49bef30
19# fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00e49bef30
20# --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
21# KDB: enter: panic
22# [ thread pid 12 tid 100077 ]
23# Stopped at      kdb_enter+0x32: movq    $0,0x12797a3(%rip)
24# db> x/s version
25# FreeBSD 14.0-CURRENT #0 main-n254961-b91a48693a53e: Thu Apr 21 09:39:27 CEST 2022
26# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO
27# db> 
28
29[ `uname -p` != "amd64" ] && exit 0
30
31. ../default.cfg
32cat > /tmp/syzkaller51.c <<EOF
33// https://syzkaller.appspot.com/bug?id=358f4bcd3d53267e6f5f069677688bad5cf7c1f4
34// autogenerated by syzkaller (https://github.com/google/syzkaller)
35// Reported-by: syzbot+341e9ebd9d24ca7dc62a@syzkaller.appspotmail.com
36
37#define _GNU_SOURCE
38
39#include <sys/types.h>
40
41#include <pwd.h>
42#include <signal.h>
43#include <stdarg.h>
44#include <stdbool.h>
45#include <stdint.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <sys/endian.h>
50#include <sys/syscall.h>
51#include <sys/wait.h>
52#include <time.h>
53#include <unistd.h>
54
55static void kill_and_wait(int pid, int* status)
56{
57  kill(pid, SIGKILL);
58  while (waitpid(-1, status, 0) != pid) {
59  }
60}
61
62static void sleep_ms(uint64_t ms)
63{
64  usleep(ms * 1000);
65}
66
67static uint64_t current_time_ms(void)
68{
69  struct timespec ts;
70  if (clock_gettime(CLOCK_MONOTONIC, &ts))
71    exit(1);
72  return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
73}
74
75static void execute_one(void);
76
77#define WAIT_FLAGS 0
78
79static void loop(void)
80{
81  int iter __unused = 0;
82  for (;; iter++) {
83    int pid = fork();
84    if (pid < 0)
85      exit(1);
86    if (pid == 0) {
87      execute_one();
88      exit(0);
89    }
90    int status = 0;
91    uint64_t start = current_time_ms();
92    for (;;) {
93      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
94        break;
95      sleep_ms(1);
96      if (current_time_ms() - start < 5000)
97        continue;
98      kill_and_wait(pid, &status);
99      break;
100    }
101  }
102}
103
104uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff};
105
106void execute_one(void)
107{
108  intptr_t res = 0;
109  res = syscall(SYS_socket, 0x1cul, 1ul, 0x84);
110  if (res != -1)
111    r[0] = res;
112  *(uint8_t*)0x20000000 = 0x1c;
113  *(uint8_t*)0x20000001 = 0x1c;
114  *(uint16_t*)0x20000002 = htobe16(0x4e22);
115  *(uint32_t*)0x20000004 = 0;
116  memset((void*)0x20000008, 0, 16);
117  *(uint32_t*)0x20000018 = 0;
118  syscall(SYS_bind, r[0], 0x20000000ul, 0x1cul);
119  syscall(SYS_listen, r[0], 5);
120  res = syscall(SYS_socket, 0x1cul, 1ul, 0x84);
121  if (res != -1)
122    r[1] = res;
123  memset((void*)0x20000240, 202, 1);
124  *(uint8_t*)0x20000040 = 0x1c;
125  *(uint8_t*)0x20000041 = 0x1c;
126  *(uint16_t*)0x20000042 = htobe16(0x4e22);
127  *(uint32_t*)0x20000044 = 0;
128  *(uint64_t*)0x20000048 = htobe64(0);
129  *(uint64_t*)0x20000050 = htobe64(1);
130  *(uint32_t*)0x20000058 = 0;
131  syscall(SYS_sendto, r[1], 0x20000240ul, 1ul, 0ul, 0x20000040ul, 0x1cul);
132  syscall(SYS_dup2, r[0], r[1]);
133  res = syscall(SYS_accept, r[1], 0ul, 0ul);
134  if (res != -1)
135    r[2] = res;
136  *(uint64_t*)0x20001980 = 0;
137  *(uint32_t*)0x20001988 = 0;
138  *(uint64_t*)0x20001990 = 0x200018c0;
139  *(uint64_t*)0x200018c0 = 0x20000400;
140  memcpy(
141      (void*)0x20000400,
142      "\xe1\xb9\x03\xdc\x43\xbc\x11\x92\xcb\x81\xb0\x96\xe0\x09\xde\x05\x09\x0b"
143      "\x44\x42\x6a\x68\x20\x0d\x0a\x78\x94\x0a\xbc\xcb\x4d\x0b\x1d\x3e\xc6\x6a"
144      "\xc2\x43\x46\x14\x08\x20\x01\x43\x3e\xf2\xc1\xb6\x6a\x0e\x5e\x13\xa8\xcf"
145      "\x99\x01\x1d\x5a\xb4\xe1\x7e\xa4\x98\x7d\x56\xb5\x86\xa3\xbb\x1e\x3e\xb5"
146      "\x85\x89\x43\xf9\x0d\xee\x7e\x8d\xc5\xac\x60\xed\x23\x62\xc7\x05\x0b\x3b"
147      "\x37\x6c\x77\x77\x5f\x1e\x0f\xa0\x90\x50\xc1\x97\x45\x47\x7f\xe7\x64\xff"
148      "\x92\x61\x9f\x9c\x06\xee\x37\x89\xf8\x81\x6e\xf7\xeb\xe5\xe1\xbd\xa8\xcc"
149      "\x50\xce\x6b\x9b\x7e\x9a\x62\x5c\x71\xd4\x41\x55\x90\x6b\xe5\x92\x55\xe0"
150      "\x3e\xc5\xfd\xfd\xbb\x5d\x2c\xf2\x70\x22\xdb\x96\x07\x02\xe6\xae\x67\xb2"
151      "\xcd\x1b\xf6\xab\x30\x3a\xfd\x24\x5d\xb7\x37\x95\x21\x4c\xc6\x8a\x29\x50"
152      "\xec\x8d\x33\x21\x6a\x93\x20\x30\x43\xe4\x54\xeb\x98\x2b\x40\x9a\x2a\x1d"
153      "\x48\x77\xc8\xf3\x06\xdf\xa3\x80\x07\xab\x8c\x6e\x30\x13\x84\x4d\xf4\x48"
154      "\x1e\x5b\x0f\xbd\x84\xe0\x17\xbe\x81\xc9\x47\xc5\x6b\x0b\xc0\x70\x74\xcb"
155      "\x6d\xe1\xe3\xeb\xdc\xe8\xbf\x72\x22\x92\x0b\x2b\xfe\xda\x7f\xcf\x96",
156      251);
157  *(uint64_t*)0x200018c8 = 0xfb;
158  *(uint64_t*)0x200018d0 = 0;
159  *(uint64_t*)0x200018d8 = 0;
160  *(uint64_t*)0x200018e0 = 0x20000600;
161  *(uint64_t*)0x200018e8 = 0;
162  *(uint64_t*)0x200018f0 = 0;
163  *(uint64_t*)0x200018f8 = 0;
164  *(uint64_t*)0x20001900 = 0;
165  *(uint64_t*)0x20001908 = 0;
166  *(uint64_t*)0x20001910 = 0;
167  *(uint64_t*)0x20001918 = 0;
168  *(uint64_t*)0x20001920 = 0;
169  *(uint64_t*)0x20001928 = 0;
170  *(uint64_t*)0x20001930 = 0;
171  *(uint64_t*)0x20001938 = 0;
172  *(uint64_t*)0x20001940 = 0;
173  *(uint64_t*)0x20001948 = 0;
174  *(uint32_t*)0x20001998 = 9;
175  *(uint64_t*)0x200019a0 = 0;
176  *(uint32_t*)0x200019a8 = 0;
177  *(uint32_t*)0x200019ac = 0x101;
178  syscall(SYS_sendmsg, r[2], 0x20001980ul, 0x20104ul);
179}
180int main(void)
181{
182  syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
183  loop();
184  return 0;
185}
186EOF
187mycc -o /tmp/syzkaller51 -Wall -Wextra -O0 /tmp/syzkaller51.c || exit 1
188
189kldstat | grep -q sctp   || { kldload sctp.ko && loaded=1; }
190
191(cd /tmp; timeout 3m ./syzkaller51)
192
193rm -rf /tmp/syzkaller51 /tmp/syzkaller51.c /tmp/syzkaller.*
194[ $loaded ] && kldunload sctp.ko
195exit 0
196