18a272653SPeter Holm#!/bin/sh 28a272653SPeter Holm 38a272653SPeter Holm# panic: sleeping without a lock 48a272653SPeter Holm# cpuid = 17 58a272653SPeter Holm# time = 1594020733 68a272653SPeter Holm# KDB: stack backtrace: 78a272653SPeter Holm# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe013e99d6d0 88a272653SPeter Holm# vpanic() at vpanic+0x182/frame 0xfffffe013e99d720 98a272653SPeter Holm# panic() at panic+0x43/frame 0xfffffe013e99d780 108a272653SPeter Holm# _sleep() at _sleep+0x466/frame 0xfffffe013e99d820 118a272653SPeter Holm# soclose() at soclose+0x12a/frame 0xfffffe013e99d890 128a272653SPeter Holm# _fdrop() at _fdrop+0x1a/frame 0xfffffe013e99d8b0 138a272653SPeter Holm# closef() at closef+0x1db/frame 0xfffffe013e99d940 148a272653SPeter Holm# fdescfree_fds() at fdescfree_fds+0x3c/frame 0xfffffe013e99d990 158a272653SPeter Holm# fdescfree() at fdescfree+0x36c/frame 0xfffffe013e99da50 168a272653SPeter Holm# exit1() at exit1+0x487/frame 0xfffffe013e99dac0 178a272653SPeter Holm# sys_sys_exit() at sys_sys_exit+0xd/frame 0xfffffe013e99dad0 188a272653SPeter Holm# amd64_syscall() at amd64_syscall+0x159/frame 0xfffffe013e99dbf0 198a272653SPeter Holm# fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe013e99dbf0 208a272653SPeter Holm# --- syscall (1, FreeBSD ELF64, sys_sys_exit), rip = 0x8004513da, rsp = 0x7fffffffe548, rbp = 0x7fffffffe560 --- 218a272653SPeter Holm# KDB: enter: panic 228a272653SPeter Holm# [ thread pid 86998 tid 100362 ] 238a272653SPeter Holm# Stopped at kdb_enter+0x37: movq $0,0x10c3a16(%rip) 248a272653SPeter Holm# db> x/s version 258a272653SPeter Holm# version:FreeBSD 13.0-CURRENT #2 r362887+d0cb7ae7cb9-c248258(mlnx3): Sat 268a272653SPeter Holm# Jul 4 10:28:49 CEST 2020 pho@t2.osted.lan:/var/tmp/deviant2/sys/amd64/compile/PHO 278a272653SPeter Holm# db> 288a272653SPeter Holm 298a272653SPeter Holm[ `uname -p` != "amd64" ] && exit 0 308a272653SPeter Holm 318a272653SPeter Holm. ../default.cfg 328a272653SPeter Holmcat > /tmp/syzkaller19.c <<EOF 338a272653SPeter Holm// https://syzkaller.appspot.com/bug?id=2196001e8447f2133532abeabaea2ebc0351f67b 348a272653SPeter Holm// autogenerated by syzkaller (https://github.com/google/syzkaller) 358a272653SPeter Holm// Reported-by: syzbot+e625d92c1dd74e402c81@syzkaller.appspotmail.com 368a272653SPeter Holm 378a272653SPeter Holm#define _GNU_SOURCE 388a272653SPeter Holm 398a272653SPeter Holm#include <sys/types.h> 408a272653SPeter Holm 418a272653SPeter Holm#include <pwd.h> 428a272653SPeter Holm#include <signal.h> 438a272653SPeter Holm#include <stdarg.h> 448a272653SPeter Holm#include <stdbool.h> 458a272653SPeter Holm#include <stdint.h> 468a272653SPeter Holm#include <stdio.h> 478a272653SPeter Holm#include <stdlib.h> 488a272653SPeter Holm#include <string.h> 498a272653SPeter Holm#include <sys/endian.h> 508a272653SPeter Holm#include <sys/syscall.h> 518a272653SPeter Holm#include <sys/wait.h> 528a272653SPeter Holm#include <time.h> 538a272653SPeter Holm#include <unistd.h> 548a272653SPeter Holm 558a272653SPeter Holmstatic void kill_and_wait(int pid, int* status) 568a272653SPeter Holm{ 578a272653SPeter Holm kill(pid, SIGKILL); 588a272653SPeter Holm while (waitpid(-1, status, 0) != pid) { 598a272653SPeter Holm } 608a272653SPeter Holm} 618a272653SPeter Holm 628a272653SPeter Holmstatic void sleep_ms(uint64_t ms) 638a272653SPeter Holm{ 648a272653SPeter Holm usleep(ms * 1000); 658a272653SPeter Holm} 668a272653SPeter Holm 678a272653SPeter Holmstatic uint64_t current_time_ms(void) 688a272653SPeter Holm{ 698a272653SPeter Holm struct timespec ts; 708a272653SPeter Holm if (clock_gettime(CLOCK_MONOTONIC, &ts)) 718a272653SPeter Holm exit(1); 728a272653SPeter Holm return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; 738a272653SPeter Holm} 748a272653SPeter Holm 758a272653SPeter Holmstatic void execute_one(void); 768a272653SPeter Holm 778a272653SPeter Holm#define WAIT_FLAGS 0 788a272653SPeter Holm 798a272653SPeter Holmstatic void loop(void) 808a272653SPeter Holm{ 81*7f658f99SPeter Holm int iter __unused; 828a272653SPeter Holm for (iter = 0;; iter++) { 838a272653SPeter Holm int pid = fork(); 848a272653SPeter Holm if (pid < 0) 858a272653SPeter Holm exit(1); 868a272653SPeter Holm if (pid == 0) { 878a272653SPeter Holm execute_one(); 888a272653SPeter Holm exit(0); 898a272653SPeter Holm } 908a272653SPeter Holm int status = 0; 918a272653SPeter Holm uint64_t start = current_time_ms(); 928a272653SPeter Holm for (;;) { 938a272653SPeter Holm if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) 948a272653SPeter Holm break; 958a272653SPeter Holm sleep_ms(1); 968a272653SPeter Holm if (current_time_ms() - start < 5 * 1000) 978a272653SPeter Holm continue; 988a272653SPeter Holm kill_and_wait(pid, &status); 998a272653SPeter Holm break; 1008a272653SPeter Holm } 1018a272653SPeter Holm } 1028a272653SPeter Holm} 1038a272653SPeter Holm 1048a272653SPeter Holmuint64_t r[1] = {0xffffffffffffffff}; 1058a272653SPeter Holm 1068a272653SPeter Holmvoid execute_one(void) 1078a272653SPeter Holm{ 1088a272653SPeter Holm intptr_t res = 0; 1098a272653SPeter Holm res = syscall(SYS_socket, 0x1cul, 1ul, 0x84); 1108a272653SPeter Holm if (res != -1) 1118a272653SPeter Holm r[0] = res; 1128a272653SPeter Holm *(uint8_t*)0x20000000 = 0x1c; 1138a272653SPeter Holm *(uint8_t*)0x20000001 = 0x1c; 1148a272653SPeter Holm *(uint16_t*)0x20000002 = htobe16(0x4e22); 1158a272653SPeter Holm *(uint32_t*)0x20000004 = 0; 1168a272653SPeter Holm *(uint8_t*)0x20000008 = 0; 1178a272653SPeter Holm *(uint8_t*)0x20000009 = 0; 1188a272653SPeter Holm *(uint8_t*)0x2000000a = 0; 1198a272653SPeter Holm *(uint8_t*)0x2000000b = 0; 1208a272653SPeter Holm *(uint8_t*)0x2000000c = 0; 1218a272653SPeter Holm *(uint8_t*)0x2000000d = 0; 1228a272653SPeter Holm *(uint8_t*)0x2000000e = 0; 1238a272653SPeter Holm *(uint8_t*)0x2000000f = 0; 1248a272653SPeter Holm *(uint8_t*)0x20000010 = 0; 1258a272653SPeter Holm *(uint8_t*)0x20000011 = 0; 1268a272653SPeter Holm *(uint8_t*)0x20000012 = 0; 1278a272653SPeter Holm *(uint8_t*)0x20000013 = 0; 1288a272653SPeter Holm *(uint8_t*)0x20000014 = 0; 1298a272653SPeter Holm *(uint8_t*)0x20000015 = 0; 1308a272653SPeter Holm *(uint8_t*)0x20000016 = 0; 1318a272653SPeter Holm *(uint8_t*)0x20000017 = 0; 1328a272653SPeter Holm *(uint32_t*)0x20000018 = 0; 1338a272653SPeter Holm syscall(SYS_bind, r[0], 0x20000000ul, 0x1cul); 1348a272653SPeter Holm *(uint8_t*)0x20000180 = 0x1c; 1358a272653SPeter Holm *(uint8_t*)0x20000181 = 0x1c; 1368a272653SPeter Holm *(uint16_t*)0x20000182 = htobe16(0x4e22); 1378a272653SPeter Holm *(uint32_t*)0x20000184 = 0; 1388a272653SPeter Holm *(uint64_t*)0x20000188 = htobe64(0); 1398a272653SPeter Holm *(uint64_t*)0x20000190 = htobe64(1); 1408a272653SPeter Holm *(uint32_t*)0x20000198 = 0; 1418a272653SPeter Holm syscall(SYS_connect, r[0], 0x20000180ul, 0x1cul); 1428a272653SPeter Holm *(uint64_t*)0x20000080 = 0; 1438a272653SPeter Holm *(uint32_t*)0x20000088 = 0; 1448a272653SPeter Holm *(uint64_t*)0x20000090 = 0; 1458a272653SPeter Holm *(uint64_t*)0x20000098 = 0; 1468a272653SPeter Holm *(uint64_t*)0x200000a0 = 0; 1478a272653SPeter Holm *(uint64_t*)0x200000a8 = 0x60; 1488a272653SPeter Holm *(uint32_t*)0x200000b0 = 0; 1498a272653SPeter Holm syscall(SYS_sendmsg, r[0], 0x20000080ul, 0x10cul); 1508a272653SPeter Holm *(uint32_t*)0x200000c0 = 0xbd; 1518a272653SPeter Holm *(uint32_t*)0x200000c4 = 0; 1528a272653SPeter Holm syscall(SYS_setsockopt, r[0], 0xffff, 0x80, 0x200000c0ul, 8ul); 1538a272653SPeter Holm} 1548a272653SPeter Holmint main(void) 1558a272653SPeter Holm{ 1568a272653SPeter Holm syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); 1578a272653SPeter Holm loop(); 1588a272653SPeter Holm return 0; 1598a272653SPeter Holm} 1608a272653SPeter HolmEOF 1618a272653SPeter Holmmycc -o /tmp/syzkaller19 -Wall -Wextra -O2 /tmp/syzkaller19.c -lpthread || 1628a272653SPeter Holm exit 1 1638a272653SPeter Holm 1648a272653SPeter Holm(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) & 1658a272653SPeter Holm(cd /tmp; ./syzkaller19) & 1668a272653SPeter Holmsleep 60 1672f0baec1SPeter Holmpkill -9 syzkaller19 1682f0baec1SPeter Holmwhile pkill swap; do sleep 1; done 1698a272653SPeter Holmwait 1708a272653SPeter Holm 1718a272653SPeter Holmrm -f /tmp/syzkaller19 /tmp/syzkaller19.c /tmp/syzkaller19.core 1728a272653SPeter Holmexit 0 173