stress2: Added a syzkaler reproducer
This commit is contained in:
Peter Holm
parent
c9a5c48ae8
commit
4581e8e9a2
298
tools/test/stress2/misc/syzkaller56.sh
Executable file
298
tools/test/stress2/misc/syzkaller56.sh
Executable file
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#!/bin/sh
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# panic: Assertion clen >= sizeof(*cm) && clen <= cm->cmsg_len failed at ../../../kern/uipc_usrreq.c:2018
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# cpuid = 8
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# time = 1653654831
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# KDB: stack backtrace:
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# db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0158aebaa0
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# vpanic() at vpanic+0x17f/frame 0xfffffe0158aebaf0
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# panic() at panic+0x43/frame 0xfffffe0158aebb50
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# unp_externalize() at unp_externalize+0x3b7/frame 0xfffffe0158aebbe0
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# soreceive_generic() at soreceive_generic+0x73d/frame 0xfffffe0158aebca0
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# soreceive() at soreceive+0x4b/frame 0xfffffe0158aebcc0
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# kern_recvit() at kern_recvit+0x1ba/frame 0xfffffe0158aebd70
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# sys_recvfrom() at sys_recvfrom+0x95/frame 0xfffffe0158aebe00
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# amd64_syscall() at amd64_syscall+0x145/frame 0xfffffe0158aebf30
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# fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0158aebf30
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# --- syscall (0, FreeBSD ELF64, nosys), rip = 0x8230797da, rsp = 0x827bc4f48, rbp = 0x827bc4f70 ---
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# KDB: enter: panic
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# [ thread pid 32490 tid 141239 ]
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# Stopped at 78043(%rip)
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# db> x/s version
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# FreeBSD 14.0-CURRENT #0 n255820-4682ac697ce9b: Fri May 27 07:06:21 CEST 2022
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# pho@mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO
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# db>
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[ `uname -p` != "amd64" ] && exit 0
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. ../default.cfg
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cat > /tmp/syzkaller56.c <<EOF
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// https://syzkaller.appspot.com/bug?id=10ad96d3c8f58f42ad73650e339a4952f9d82254
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// autogenerated by syzkaller (https://github.com/google/syzkaller)
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// Reported-by: syzbot+c48c62e7fbd8ef327088@syzkaller.appspotmail.com
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#define _GNU_SOURCE
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#include <errno.h>
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#include <pthread.h>
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#include <pwd.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/endian.h>
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#include <sys/syscall.h>
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#include <time.h>
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#include <unistd.h>
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static void sleep_ms(uint64_t ms)
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{
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usleep(ms * 1000);
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}
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static uint64_t current_time_ms(void)
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{
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struct timespec ts;
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if (clock_gettime(CLOCK_MONOTONIC, &ts))
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exit(1);
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return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
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}
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static void thread_start(void* (*fn)(void*), void* arg)
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{
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pthread_t th;
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pthread_attr_t attr;
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pthread_attr_init(&attr);
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pthread_attr_setstacksize(&attr, 128 << 10);
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int i = 0;
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for (; i < 100; i++) {
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if (pthread_create(&th, &attr, fn, arg) == 0) {
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pthread_attr_destroy(&attr);
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return;
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}
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if (errno == EAGAIN) {
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usleep(50);
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continue;
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}
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break;
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}
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exit(1);
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}
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typedef struct {
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pthread_mutex_t mu;
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pthread_cond_t cv;
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int state;
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} event_t;
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static void event_init(event_t* ev)
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{
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if (pthread_mutex_init(&ev->mu, 0))
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exit(1);
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if (pthread_cond_init(&ev->cv, 0))
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exit(1);
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ev->state = 0;
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}
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static void event_reset(event_t* ev)
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{
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ev->state = 0;
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}
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static void event_set(event_t* ev)
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{
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pthread_mutex_lock(&ev->mu);
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if (ev->state)
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exit(1);
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ev->state = 1;
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pthread_mutex_unlock(&ev->mu);
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pthread_cond_broadcast(&ev->cv);
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}
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static void event_wait(event_t* ev)
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{
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pthread_mutex_lock(&ev->mu);
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while (!ev->state)
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pthread_cond_wait(&ev->cv, &ev->mu);
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pthread_mutex_unlock(&ev->mu);
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}
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static int event_isset(event_t* ev)
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{
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pthread_mutex_lock(&ev->mu);
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int res = ev->state;
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pthread_mutex_unlock(&ev->mu);
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return res;
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}
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static int event_timedwait(event_t* ev, uint64_t timeout)
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{
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uint64_t start = current_time_ms();
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uint64_t now = start;
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pthread_mutex_lock(&ev->mu);
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for (;;) {
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if (ev->state)
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break;
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uint64_t remain = timeout - (now - start);
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struct timespec ts;
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ts.tv_sec = remain / 1000;
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ts.tv_nsec = (remain % 1000) * 1000 * 1000;
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pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
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now = current_time_ms();
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if (now - start > timeout)
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break;
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}
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int res = ev->state;
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pthread_mutex_unlock(&ev->mu);
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return res;
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}
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struct thread_t {
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int created, call;
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event_t ready, done;
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};
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static struct thread_t threads[16];
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static void execute_call(int call);
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static int running;
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static void* thr(void* arg)
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{
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struct thread_t* th = (struct thread_t*)arg;
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for (;;) {
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event_wait(&th->ready);
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event_reset(&th->ready);
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execute_call(th->call);
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__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
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event_set(&th->done);
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}
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return 0;
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}
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static void loop(void)
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{
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int i, call, thread;
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for (call = 0; call < 3; call++) {
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for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0]));
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thread++) {
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struct thread_t* th = &threads[thread];
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if (!th->created) {
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th->created = 1;
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event_init(&th->ready);
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event_init(&th->done);
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event_set(&th->done);
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thread_start(thr, th);
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}
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if (!event_isset(&th->done))
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continue;
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event_reset(&th->done);
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th->call = call;
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__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
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event_set(&th->ready);
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event_timedwait(&th->done, 50);
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break;
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}
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}
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for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
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sleep_ms(1);
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}
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uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
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void execute_call(int call)
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{
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intptr_t res = 0;
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switch (call) {
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case 0:
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res = syscall(SYS_socketpair, 1ul, 5ul, 0, 0x20000100ul);
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if (res != -1) {
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r[0] = *(uint32_t*)0x20000100;
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r[1] = *(uint32_t*)0x20000104;
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}
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break;
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case 1:
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syscall(SYS_recvfrom, r[0], 0x20000140ul, 0x1000ul, 0ul, 0ul, 0ul);
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break;
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case 2:
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*(uint64_t*)0x20001e40 = 0;
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*(uint32_t*)0x20001e48 = 0;
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*(uint64_t*)0x20001e50 = 0;
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*(uint64_t*)0x20001e58 = 0;
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*(uint64_t*)0x20001e60 = 0x20001f80;
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memcpy((void*)0x20001f80,
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"\x60\x00\x00\x00\xff\xff\x00\x00\x03\x00\x00\x00", 12);
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*(uint32_t*)0x20001f8c = -1;
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*(uint32_t*)0x20001f90 = 0;
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*(uint32_t*)0x20001f94 = 0;
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*(uint32_t*)0x20001f98 = 0;
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memcpy((void*)0x20001f9c, "\x10\x00\x26\x00", 4);
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*(uint32_t*)0x20001fa0 = 0;
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*(uint32_t*)0x20001fa4 = 0;
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*(uint32_t*)0x20001fa8 = 0;
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*(uint32_t*)0x20001fac = 0;
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*(uint32_t*)0x20001fb0 = 0;
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*(uint32_t*)0x20001fb4 = 0;
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*(uint32_t*)0x20001fb8 = -1;
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*(uint32_t*)0x20001fbc = 0;
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*(uint32_t*)0x20001fc0 = -1;
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*(uint32_t*)0x20001fc4 = 0;
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*(uint32_t*)0x20001fc8 = 0;
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*(uint32_t*)0x20001fcc = 0;
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*(uint32_t*)0x20001fd0 = 0;
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*(uint32_t*)0x20001fd4 = 0;
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*(uint32_t*)0x20001fd8 = 0;
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*(uint32_t*)0x20001fdc = 0;
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memcpy((void*)0x20001fe0,
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"\x60\x00\x00\x00\xff\xff\x00\x00\x03\x00\x00\x00", 12);
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*(uint32_t*)0x20001fec = 0;
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*(uint32_t*)0x20001ff0 = 0;
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*(uint32_t*)0x20001ff4 = 0;
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*(uint32_t*)0x20001ff8 = -1;
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memcpy((void*)0x20001ffc, "\x10\x00\x00\x00", 4);
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*(uint32_t*)0x20002000 = -1;
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*(uint32_t*)0x20002004 = 0;
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*(uint32_t*)0x20002008 = 0;
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*(uint32_t*)0x2000200c = 0;
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*(uint32_t*)0x20002010 = 0;
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*(uint32_t*)0x20002014 = 0;
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*(uint32_t*)0x20002018 = -1;
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*(uint32_t*)0x2000201c = 0;
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*(uint32_t*)0x20002020 = -1;
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*(uint32_t*)0x20002024 = 0;
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*(uint32_t*)0x20002028 = 0;
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*(uint32_t*)0x2000202c = 0;
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*(uint32_t*)0x20002030 = 0;
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*(uint32_t*)0x20002034 = 0;
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*(uint32_t*)0x20002038 = 0;
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*(uint32_t*)0x2000203c = -1;
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memcpy((void*)0x20002040,
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"\x14\x00\x00\x00\xff\xff\x00\x00\x01\x00\x00\x00", 12);
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*(uint32_t*)0x2000204c = -1;
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*(uint32_t*)0x20002050 = r[1];
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*(uint64_t*)0x20001e68 = 0xd4;
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*(uint32_t*)0x20001e70 = 0;
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syscall(SYS_sendmsg, r[1], 0x20001e40ul, 0ul);
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break;
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}
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}
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int main(void)
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{
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syscall(SYS_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x1012ul, -1, 0ul);
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loop();
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return 0;
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}
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EOF
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mycc -o /tmp/syzkaller56 -Wall -Wextra -O0 /tmp/syzkaller56.c -lpthread ||
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exit 1
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start=`date +%s`
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while [ $((`date +%s` - start)) -lt 60 ]; do
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(cd /tmp; timeout 3m ./syzkaller56)
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done
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rm -rf /tmp/syzkaller56 /tmp/syzkaller56.c /tmp/syzkaller56.core \
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/tmp/syzkaller.??????
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exit 0
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