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