Date: Tue, 4 Aug 2020 06:38:10 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r363827 - user/pho/stress2/misc Message-ID: <202008040638.0746cAID017072@repo.freebsd.org>
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Author: pho Date: Tue Aug 4 06:38:10 2020 New Revision: 363827 URL: https://svnweb.freebsd.org/changeset/base/363827 Log: Added a new syzkaller reproducer. Added: user/pho/stress2/misc/syzkaller19.sh (contents, props changed) Added: user/pho/stress2/misc/syzkaller19.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/syzkaller19.sh Tue Aug 4 06:38:10 2020 (r363827) @@ -0,0 +1,173 @@ +#!/bin/sh + +# panic: sleeping without a lock +# cpuid = 17 +# time = 1594020733 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe013e99d6d0 +# vpanic() at vpanic+0x182/frame 0xfffffe013e99d720 +# panic() at panic+0x43/frame 0xfffffe013e99d780 +# _sleep() at _sleep+0x466/frame 0xfffffe013e99d820 +# soclose() at soclose+0x12a/frame 0xfffffe013e99d890 +# _fdrop() at _fdrop+0x1a/frame 0xfffffe013e99d8b0 +# closef() at closef+0x1db/frame 0xfffffe013e99d940 +# fdescfree_fds() at fdescfree_fds+0x3c/frame 0xfffffe013e99d990 +# fdescfree() at fdescfree+0x36c/frame 0xfffffe013e99da50 +# exit1() at exit1+0x487/frame 0xfffffe013e99dac0 +# sys_sys_exit() at sys_sys_exit+0xd/frame 0xfffffe013e99dad0 +# amd64_syscall() at amd64_syscall+0x159/frame 0xfffffe013e99dbf0 +# fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe013e99dbf0 +# --- syscall (1, FreeBSD ELF64, sys_sys_exit), rip = 0x8004513da, rsp = 0x7fffffffe548, rbp = 0x7fffffffe560 --- +# KDB: enter: panic +# [ thread pid 86998 tid 100362 ] +# Stopped at kdb_enter+0x37: movq $0,0x10c3a16(%rip) +# db> x/s version +# version:FreeBSD 13.0-CURRENT #2 r362887+d0cb7ae7cb9-c248258(mlnx3): Sat +# Jul 4 10:28:49 CEST 2020 pho@t2.osted.lan:/var/tmp/deviant2/sys/amd64/compile/PHO +# db> + +# $FreeBSD$ + +[ `uname -p` != "amd64" ] && exit 0 + +. ../default.cfg +cat > /tmp/syzkaller19.c <<EOF +// https://syzkaller.appspot.com/bug?id=2196001e8447f2133532abeabaea2ebc0351f67b +// autogenerated by syzkaller (https://github.com/google/syzkaller) +// Reported-by: syzbot+e625d92c1dd74e402c81@syzkaller.appspotmail.com + +#define _GNU_SOURCE + +#include <sys/types.h> + +#include <pwd.h> +#include <signal.h> +#include <stdarg.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/endian.h> +#include <sys/syscall.h> +#include <sys/wait.h> +#include <time.h> +#include <unistd.h> + +static void kill_and_wait(int pid, int* status) +{ + kill(pid, SIGKILL); + while (waitpid(-1, status, 0) != pid) { + } +} + +static void sleep_ms(uint64_t ms) +{ + usleep(ms * 1000); +} + +static uint64_t current_time_ms(void) +{ + struct timespec ts; + if (clock_gettime(CLOCK_MONOTONIC, &ts)) + exit(1); + return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; +} + +static void execute_one(void); + +#define WAIT_FLAGS 0 + +static void loop(void) +{ + int iter; + for (iter = 0;; iter++) { + int pid = fork(); + if (pid < 0) + exit(1); + if (pid == 0) { + execute_one(); + exit(0); + } + int status = 0; + uint64_t start = current_time_ms(); + for (;;) { + if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) + break; + sleep_ms(1); + if (current_time_ms() - start < 5 * 1000) + continue; + kill_and_wait(pid, &status); + break; + } + } +} + +uint64_t r[1] = {0xffffffffffffffff}; + +void execute_one(void) +{ + intptr_t res = 0; + res = syscall(SYS_socket, 0x1cul, 1ul, 0x84); + if (res != -1) + r[0] = res; + *(uint8_t*)0x20000000 = 0x1c; + *(uint8_t*)0x20000001 = 0x1c; + *(uint16_t*)0x20000002 = htobe16(0x4e22); + *(uint32_t*)0x20000004 = 0; + *(uint8_t*)0x20000008 = 0; + *(uint8_t*)0x20000009 = 0; + *(uint8_t*)0x2000000a = 0; + *(uint8_t*)0x2000000b = 0; + *(uint8_t*)0x2000000c = 0; + *(uint8_t*)0x2000000d = 0; + *(uint8_t*)0x2000000e = 0; + *(uint8_t*)0x2000000f = 0; + *(uint8_t*)0x20000010 = 0; + *(uint8_t*)0x20000011 = 0; + *(uint8_t*)0x20000012 = 0; + *(uint8_t*)0x20000013 = 0; + *(uint8_t*)0x20000014 = 0; + *(uint8_t*)0x20000015 = 0; + *(uint8_t*)0x20000016 = 0; + *(uint8_t*)0x20000017 = 0; + *(uint32_t*)0x20000018 = 0; + syscall(SYS_bind, r[0], 0x20000000ul, 0x1cul); + *(uint8_t*)0x20000180 = 0x1c; + *(uint8_t*)0x20000181 = 0x1c; + *(uint16_t*)0x20000182 = htobe16(0x4e22); + *(uint32_t*)0x20000184 = 0; + *(uint64_t*)0x20000188 = htobe64(0); + *(uint64_t*)0x20000190 = htobe64(1); + *(uint32_t*)0x20000198 = 0; + syscall(SYS_connect, r[0], 0x20000180ul, 0x1cul); + *(uint64_t*)0x20000080 = 0; + *(uint32_t*)0x20000088 = 0; + *(uint64_t*)0x20000090 = 0; + *(uint64_t*)0x20000098 = 0; + *(uint64_t*)0x200000a0 = 0; + *(uint64_t*)0x200000a8 = 0x60; + *(uint32_t*)0x200000b0 = 0; + syscall(SYS_sendmsg, r[0], 0x20000080ul, 0x10cul); + *(uint32_t*)0x200000c0 = 0xbd; + *(uint32_t*)0x200000c4 = 0; + syscall(SYS_setsockopt, r[0], 0xffff, 0x80, 0x200000c0ul, 8ul); +} +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + loop(); + return 0; +} +EOF +mycc -o /tmp/syzkaller19 -Wall -Wextra -O2 /tmp/syzkaller19.c -lpthread || + exit 1 + +(cd ../testcases/swap; ./swap -t 1m -i 20 -h > /dev/null 2>&1) & +(cd /tmp; ./syzkaller19) & +sleep 60 +pkill -9 syzkaller19 swap +wait + +rm -f /tmp/syzkaller19 /tmp/syzkaller19.c /tmp/syzkaller19.core +exit 0help
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