1#!/bin/sh 2 3# panic: sbsndptr_noadv: sb_mb is NULL 4# cpuid = 0 5# time = 1586867804 6# KDB: stack backtrace: 7# db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe0025a68360 8# vpanic() at vpanic+0x1c7/frame 0xfffffe0025a683c0 9# panic() at panic+0x43/frame 0xfffffe0025a68420 10# sbsndptr_noadv() at sbsndptr_noadv+0xae/frame 0xfffffe0025a68460 11# rack_output() at rack_output+0x51f5/frame 0xfffffe0025a68700 12# tcp_usr_send() at tcp_usr_send+0x5c7/frame 0xfffffe0025a687e0 13# sosend_generic() at sosend_generic+0x8fd/frame 0xfffffe0025a688e0 14# sosend() at sosend+0xc6/frame 0xfffffe0025a68950 15# kern_sendit() at kern_sendit+0x33d/frame 0xfffffe0025a68a00 16# sendit() at sendit+0x224/frame 0xfffffe0025a68a60 17# sys_sendto() at sys_sendto+0x5c/frame 0xfffffe0025a68ac0 18# amd64_syscall() at amd64_syscall+0x262/frame 0xfffffe0025a68bf0 19 20[ `uname -p` = "i386" ] && exit 0 21 22. ../default.cfg 23cat > /tmp/syzkaller10.c <<EOF 24// https://syzkaller.appspot.com/bug?id=048f650e99696f881872a285cef0e3b9bd4f4e25 25// autogenerated by syzkaller (https://github.com/google/syzkaller) 26 27#define _GNU_SOURCE 28 29#include <pwd.h> 30#include <stdarg.h> 31#include <stdbool.h> 32#include <stdint.h> 33#include <stdio.h> 34#include <stdlib.h> 35#include <string.h> 36#include <sys/endian.h> 37#include <sys/syscall.h> 38#include <unistd.h> 39 40uint64_t r[1] = {0xffffffffffffffff}; 41 42int main(void) 43{ 44 syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x1012ul, -1, 0ul); 45 intptr_t res = 0; 46 res = syscall(SYS_socket, 2ul, 1ul, 0); 47 if (res != -1) 48 r[0] = res; 49 memcpy((void*)0x20000080, 50 "rack\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" 51 "\000\000\000\000\000\000\000\000\000\000\000\000", 52 32); 53 *(uint32_t*)0x200000a0 = 0; 54 syscall(SYS_setsockopt, r[0], 6, 0x2000, 0x20000080ul, 0x24ul); 55 *(uint8_t*)0x20000000 = 0x2c; 56 *(uint8_t*)0x20000001 = 2; 57 *(uint16_t*)0x20000002 = htobe16(0x4e21); 58 *(uint32_t*)0x20000004 = htobe32(-1); 59 *(uint8_t*)0x20000008 = 0; 60 *(uint8_t*)0x20000009 = 0; 61 *(uint8_t*)0x2000000a = 0; 62 *(uint8_t*)0x2000000b = 0; 63 *(uint8_t*)0x2000000c = 0; 64 *(uint8_t*)0x2000000d = 0; 65 *(uint8_t*)0x2000000e = 0; 66 *(uint8_t*)0x2000000f = 0; 67 syscall(SYS_sendto, r[0], 0ul, 0ul, 0ul, 0x20000000ul, 0x10ul); 68 *(uint8_t*)0x20000040 = 0x10; 69 *(uint8_t*)0x20000041 = 2; 70 *(uint16_t*)0x20000042 = htobe16(0x4e21); 71 *(uint32_t*)0x20000044 = htobe32(0); 72 *(uint8_t*)0x20000048 = 0; 73 *(uint8_t*)0x20000049 = 0; 74 *(uint8_t*)0x2000004a = 0; 75 *(uint8_t*)0x2000004b = 0; 76 *(uint8_t*)0x2000004c = 0; 77 *(uint8_t*)0x2000004d = 0; 78 *(uint8_t*)0x2000004e = 0; 79 *(uint8_t*)0x2000004f = 0; 80 syscall(SYS_sendto, r[0], 0ul, 0ul, 0x60005ul, 0x20000040ul, 0x10ul); 81 return 0; 82} 83EOF 84mycc -o /tmp/syzkaller10 -Wall -Wextra -O2 /tmp/syzkaller10.c -lpthread || 85 exit 1 86 87(cd /tmp; ./syzkaller10) & 88sleep 60 89pkill -9 syzkaller10 90wait 91 92rm -f /tmp/syzkaller10 /tmp/syzkaller10.c /tmp/syzkaller10.core 93exit 0 94