Date: Sat, 28 Nov 2020 08:07:55 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r368120 - user/pho/stress2/misc Message-ID: <202011280807.0AS87tBc052275@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: pho Date: Sat Nov 28 08:07:55 2020 New Revision: 368120 URL: https://svnweb.freebsd.org/changeset/base/368120 Log: Add a syzkaller reproducer. Added: user/pho/stress2/misc/syzkaller29.sh (contents, props changed) Added: user/pho/stress2/misc/syzkaller29.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/syzkaller29.sh Sat Nov 28 08:07:55 2020 (r368120) @@ -0,0 +1,130 @@ +#!/bin/sh + +# panic: uma_zalloc_debug: called within spinlock or critical section +# cpuid = 9 +# time = 1606151277 +# KDB: stack backtrace: +# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0101c628a0 +# vpanic() at vpanic+0x181/frame 0xfffffe0101c628f0 +# panic() at panic+0x43/frame 0xfffffe0101c62950 +# uma_zalloc_arg() at uma_zalloc_arg+0x1e6/frame 0xfffffe0101c62990 +# cpuset_modify_domain() at cpuset_modify_domain+0x1bf/frame 0xfffffe0101c62a10 +# kern_cpuset_setdomain() at kern_cpuset_setdomain+0x402/frame 0xfffffe0101c62aa0 +# sys_cpuset_setdomain() at sys_cpuset_setdomain+0x26/frame 0xfffffe0101c62ac0 +# amd64_syscall() at amd64_syscall+0x147/frame 0xfffffe0101c62bf0 +# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0101c62bf0 +# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x800380d4a, rsp = 0x7fffffffe4b8, rbp = 0x7fffffffe4f0 --- +# KDB: enter: panic +# [ thread pid 81187 tid 100369 ] +# Stopped at kdb_enter+0x37: movq $0,0x10b3236(%rip) +# db> x/s version +# version: FreeBSD 13.0-CURRENT #0 r367945: Mon Nov 23 09:10:40 CET 2020 +# pho@t2.osted.lan:/usr/src/sys/amd64/compile/PHO +# db> + +# $FreeBSD$ + +[ `uname -p` != "amd64" ] && exit 0 + +# Fixed by r368116 + +. ../default.cfg +cat > /tmp/syzkaller29.c <<EOF +// https://syzkaller.appspot.com/bug?id=c3452066dba9238c4551010eb130944442d9174f +// autogenerated by syzkaller (https://github.com/google/syzkaller) +// Reported-by: syzbot+6743fa07b9b7528dc561@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 = 0; + for (;; 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; + } + } +} + +void execute_one(void) +{ + *(uint64_t*)0x20000240 = 1; + *(uint64_t*)0x20000248 = 0; + *(uint64_t*)0x20000250 = 0; + *(uint64_t*)0x20000258 = 0; + syscall(SYS_cpuset_setdomain, 2ul, 2ul, 0ul, 0x20ul, 0x20000240ul, 4ul); + *(uint64_t*)0x20000240 = 1; + *(uint64_t*)0x20000248 = 0; + *(uint64_t*)0x20000250 = 0; + *(uint64_t*)0x20000258 = 0; + syscall(SYS_cpuset_setdomain, 3ul, 2ul, 0ul, 0x20ul, 0x20000240ul, 1ul); +} +int main(void) +{ + syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul); + loop(); + return 0; +} +EOF +mycc -o /tmp/syzkaller29 -Wall -Wextra -O0 /tmp/syzkaller29.c || + exit 1 + +(cd /tmp; timeout 3m ./syzkaller29) + +rm -rf /tmp/syzkaller29 syzkaller29.c /tmp/syzkaller.* +exit 0
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202011280807.0AS87tBc052275>