1#!/bin/sh 2 3# panic: to_ticks == 0 for timer type 2 4# cpuid = 1 5# time = 1585113958 6# KDB: stack backtrace: 7# db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0024a54420 8# vpanic() at vpanic+0x1c7/frame 0xfffffe0024a54480 9# panic() at panic+0x43/frame 0xfffffe0024a544e0 10# sctp_timer_start() at sctp_timer_start+0xc7f/frame 0xfffffe0024a54540 11# sctp_send_initiate() at sctp_send_initiate+0x10b/frame 0xfffffe0024a545d0 12# sctp_lower_sosend() at sctp_lower_sosend+0x3f54/frame 0xfffffe0024a547b0 13# sctp_sosend() at sctp_sosend+0x501/frame 0xfffffe0024a548e0 14# sosend() at sosend+0xc6/frame 0xfffffe0024a54950 15# kern_sendit() at kern_sendit+0x33d/frame 0xfffffe0024a54a00 16# sendit() at sendit+0x224/frame 0xfffffe0024a54a60 17# sys_sendto() at sys_sendto+0x5c/frame 0xfffffe0024a54ac0 18# amd64_syscall() at amd64_syscall+0x2f4/frame 0xfffffe0024a54bf0 19# fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe0024a54bf0 20 21# Fixed by r359405 22 23[ `uname -p` = "i386" ] && exit 0 24 25. ../default.cfg 26kldstat -v | grep -q sctp || kldload sctp.ko 27cat > /tmp/syzkaller6.c <<EOF 28// https://syzkaller.appspot.com/bug?id=86fc212419e315473f7db833b9c835be21f17029 29// autogenerated by syzkaller (https://github.com/google/syzkaller) 30 31#define _GNU_SOURCE 32 33#include <pwd.h> 34#include <stdarg.h> 35#include <stdbool.h> 36#include <stdint.h> 37#include <stdio.h> 38#include <stdlib.h> 39#include <string.h> 40#include <sys/endian.h> 41#include <sys/syscall.h> 42#include <unistd.h> 43 44uint64_t r[1] = {0xffffffffffffffff}; 45 46int main(void) 47{ 48 syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul); 49 intptr_t res = 0; 50 res = syscall(SYS_socket, 0x1cul, 5ul, 0x84); 51 if (res != -1) 52 r[0] = res; 53 *(uint32_t*)0x20000200 = 0; 54 *(uint32_t*)0x20000204 = 0xfffffff9; 55 *(uint32_t*)0x20000208 = 0xfffffffb; 56 *(uint32_t*)0x2000020c = 0; 57 syscall(SYS_setsockopt, r[0], 0x84, 1, 0x20000200ul, 0x39eul); 58 memcpy((void*)0x20000040, "\x11", 1); 59 *(uint8_t*)0x20000100 = 0x10; 60 *(uint8_t*)0x20000101 = 2; 61 *(uint16_t*)0x20000102 = htobe16(0x4e21); 62 *(uint8_t*)0x20000104 = 0xac; 63 *(uint8_t*)0x20000105 = 0x14; 64 *(uint8_t*)0x20000106 = 0; 65 *(uint8_t*)0x20000107 = 0xbb; 66 *(uint8_t*)0x20000108 = 0; 67 *(uint8_t*)0x20000109 = 0; 68 *(uint8_t*)0x2000010a = 0; 69 *(uint8_t*)0x2000010b = 0; 70 *(uint8_t*)0x2000010c = 0; 71 *(uint8_t*)0x2000010d = 0; 72 *(uint8_t*)0x2000010e = 0; 73 *(uint8_t*)0x2000010f = 0; 74 syscall(SYS_sendto, r[0], 0x20000040ul, 1ul, 0ul, 0x20000100ul, 0x10ul); 75 return 0; 76} 77EOF 78mycc -o /tmp/syzkaller6 -Wall -Wextra -O2 /tmp/syzkaller6.c -lpthread || 79 exit 1 80 81(cd /tmp; ./syzkaller6) 82 83rm /tmp/syzkaller6 /tmp/syzkaller6.c 84exit 0 85