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/* SPDX-License-Identifier: MIT */
// https://syzkaller.appspot.com/bug?id=1f2ecd7a23dba87e5ca3505ec44514a462cfe8c0
// autogenerated by syzkaller (https://github.com/google/syzkaller)
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <unistd.h>
#include "liburing.h"
#include "../src/syscall.h"
static bool write_file(const char* file, const char* what, ...)
{
char buf[1024];
va_list args;
va_start(args, what);
vsnprintf(buf, sizeof(buf), what, args);
va_end(args);
buf[sizeof(buf) - 1] = 0;
int len = strlen(buf);
int fd = open(file, O_WRONLY | O_CLOEXEC);
if (fd == -1)
return false;
if (write(fd, buf, len) != len) {
int err = errno;
close(fd);
errno = err;
return false;
}
close(fd);
return true;
}
static int inject_fault(int nth)
{
int fd;
fd = open("/proc/thread-self/fail-nth", O_RDWR);
if (fd == -1)
exit(1);
char buf[16];
sprintf(buf, "%d", nth + 1);
if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
exit(1);
return fd;
}
static int setup_fault()
{
static struct {
const char* file;
const char* val;
bool fatal;
} files[] = {
{"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true},
{"/sys/kernel/debug/failslab/verbose", "0", false},
{"/sys/kernel/debug/fail_futex/ignore-private", "N", false},
{"/sys/kernel/debug/fail_page_alloc/verbose", "0", false},
{"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false},
{"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false},
{"/sys/kernel/debug/fail_page_alloc/min-order", "0", false},
};
unsigned i;
for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
if (!write_file(files[i].file, files[i].val)) {
if (files[i].fatal)
return 1;
}
}
return 0;
}
#ifndef __NR_io_uring_register
#define __NR_io_uring_register 427
#endif
#ifndef __NR_io_uring_setup
#define __NR_io_uring_setup 425
#endif
uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};
int main(int argc, char *argv[])
{
if (argc > 1)
return 0;
mmap((void *) 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0);
if (setup_fault()) {
printf("Test needs failslab/fail_futex/fail_page_alloc enabled, skipped\n");
return 0;
}
intptr_t res = 0;
*(uint32_t*)0x20000000 = 0;
*(uint32_t*)0x20000004 = 0;
*(uint32_t*)0x20000008 = 0;
*(uint32_t*)0x2000000c = 0;
*(uint32_t*)0x20000010 = 0;
*(uint32_t*)0x20000014 = 0;
*(uint32_t*)0x20000018 = 0;
*(uint32_t*)0x2000001c = 0;
*(uint32_t*)0x20000020 = 0;
*(uint32_t*)0x20000024 = 0;
*(uint32_t*)0x20000028 = 0;
*(uint32_t*)0x2000002c = 0;
*(uint32_t*)0x20000030 = 0;
*(uint32_t*)0x20000034 = 0;
*(uint32_t*)0x20000038 = 0;
*(uint32_t*)0x2000003c = 0;
*(uint32_t*)0x20000040 = 0;
*(uint32_t*)0x20000044 = 0;
*(uint64_t*)0x20000048 = 0;
*(uint32_t*)0x20000050 = 0;
*(uint32_t*)0x20000054 = 0;
*(uint32_t*)0x20000058 = 0;
*(uint32_t*)0x2000005c = 0;
*(uint32_t*)0x20000060 = 0;
*(uint32_t*)0x20000064 = 0;
*(uint32_t*)0x20000068 = 0;
*(uint32_t*)0x2000006c = 0;
*(uint64_t*)0x20000070 = 0;
res = __sys_io_uring_setup(0x6a6, (struct io_uring_params *) 0x20000000ul);
if (res != -1)
r[0] = res;
res = socket(0x11ul, 2ul, 0x300ul);
if (res != -1)
r[1] = res;
*(uint32_t*)0x20000080 = r[1];
inject_fault(1);
__sys_io_uring_register(r[0], 2ul, (const void *) 0x20000080ul, 1ul);
return 0;
}
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