1#!/bin/sh 2 3# panic: crp_iv_start set when IV isn't used 4# cpuid = 15 5# time = 1620460567 6# KDB: stack backtrace: 7# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe023ceef5d0 8# vpanic() at vpanic+0x181/frame 0xfffffe023ceef620 9# panic() at panic+0x43/frame 0xfffffe023ceef680 10# crp_sanity() at crp_sanity+0x236/frame 0xfffffe023ceef6b0 11# crypto_dispatch() at crypto_dispatch+0xf/frame 0xfffffe023ceef6d0 12# crypto_ioctl() at crypto_ioctl+0x1e33/frame 0xfffffe023ceef7e0 13# devfs_ioctl() at devfs_ioctl+0xcd/frame 0xfffffe023ceef830 14# VOP_IOCTL_APV() at VOP_IOCTL_APV+0x59/frame 0xfffffe023ceef850 15# vn_ioctl() at vn_ioctl+0x133/frame 0xfffffe023ceef960 16# devfs_ioctl_f() at devfs_ioctl_f+0x1e/frame 0xfffffe023ceef980 17# kern_ioctl() at kern_ioctl+0x289/frame 0xfffffe023ceef9f0 18# sys_ioctl() at sys_ioctl+0x12a/frame 0xfffffe023ceefac0 19# amd64_syscall() at amd64_syscall+0x147/frame 0xfffffe023ceefbf0 20# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe023ceefbf0 21# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8003827da, rsp = 0x7fffffffe4e8, rbp = 0x7fffffffe540 --- 22# KDB: enter: panic 23# [ thread pid 18612 tid 109119 ] 24# Stopped at kdb_enter+0x37: movq $0,0x1281a2e(%rip) 25# db> x/s version 26# version: FreeBSD 14.0-CURRENT #0 main-n246560-2018d488628: Sat May 8 08:32:52 CEST 2021 27# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO 28# db> 29 30[ `uname -p` != "amd64" ] && exit 0 31[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 32 33. ../default.cfg 34cat > /tmp/syzkaller37.c <<EOF 35// https://syzkaller.appspot.com/bug?id=9c74fee9d6ceabfff73819e94328a18723217cf9 36// autogenerated by syzkaller (https://github.com/google/syzkaller) 37// Reported-by: syzbot+220faa5eeb4d47b23877@syzkaller.appspotmail.com 38 39#define _GNU_SOURCE 40 41#include <pwd.h> 42#include <stdarg.h> 43#include <stdbool.h> 44#include <stdint.h> 45#include <stdio.h> 46#include <stdlib.h> 47#include <string.h> 48#include <sys/endian.h> 49#include <sys/syscall.h> 50#include <unistd.h> 51 52uint64_t r[1] = {0xffffffffffffffff}; 53 54int main(void) 55{ 56 syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); 57 intptr_t res = 0; 58 memcpy((void*)0x20000340, "/dev/crypto\000", 12); 59 res = syscall(SYS_openat, 0xffffffffffffff9cul, 0x20000340ul, 0ul, 0ul); 60 if (res != -1) 61 r[0] = res; 62 *(uint32_t*)0x20000040 = 0x10; 63 *(uint32_t*)0x20000044 = 0x1d; 64 *(uint32_t*)0x20000048 = 1; 65 *(uint64_t*)0x20000050 = 0x20000080; 66 memset((void*)0x20000080, 66, 1); 67 *(uint32_t*)0x20000058 = 0; 68 *(uint64_t*)0x20000060 = 0; 69 *(uint32_t*)0x20000068 = 0; 70 *(uint32_t*)0x2000006c = 0xfdffffff; 71 *(uint32_t*)0x20000070 = 0; 72 *(uint32_t*)0x20000074 = 0; 73 *(uint32_t*)0x20000078 = 0; 74 *(uint32_t*)0x2000007c = 0; 75 syscall(SYS_ioctl, r[0], 0xc040636aul, 0x20000040ul); 76 *(uint32_t*)0x20000000 = 0; 77 *(uint16_t*)0x20000004 = 2; 78 *(uint16_t*)0x20000006 = 0; 79 *(uint32_t*)0x20000008 = 0; 80 *(uint32_t*)0x2000000c = 0x10001; 81 *(uint32_t*)0x20000010 = 0; 82 *(uint64_t*)0x20000018 = 0; 83 *(uint64_t*)0x20000020 = 0; 84 *(uint64_t*)0x20000028 = 0x200001c0; 85 *(uint64_t*)0x20000030 = 0x20000380; 86 *(uint64_t*)0x20000038 = 0; 87 syscall(SYS_ioctl, r[0], 0xc040636dul, 0x20000000ul); 88 return 0; 89} 90EOF 91mycc -o /tmp/syzkaller37 -Wall -Wextra -O0 /tmp/syzkaller37.c || 92 exit 1 93 94kldload cryptodev.ko && loaded=1 95(cd /tmp; timeout 3m ./syzkaller37) 96[ $loaded ] && kldunload cryptodev.ko 97 98rm -rf /tmp/syzkaller37 /tmp/syzkaller37.c /tmp/syzkaller.* 99exit 0 100