| // general protection fault in lockdep_invariant_state (2) |
| // https://syzkaller.appspot.com/bug?id=c774e48e25e41191733d97349b62efd91f3cd63f |
| // status:fixed |
| // autogenerated by syzkaller (http://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <unistd.h> |
| |
| __attribute__((noreturn)) static void doexit(int status) |
| { |
| volatile unsigned i; |
| syscall(__NR_exit_group, status); |
| for (i = 0;; i++) { |
| } |
| } |
| |
| #include <stdint.h> |
| #include <string.h> |
| |
| const int kFailStatus = 67; |
| const int kRetryStatus = 69; |
| |
| static void fail(const char* msg, ...) |
| { |
| int e = errno; |
| va_list args; |
| va_start(args, msg); |
| vfprintf(stderr, msg, args); |
| va_end(args); |
| fprintf(stderr, " (errno %d)\n", e); |
| doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus); |
| } |
| |
| 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) { |
| close(fd); |
| return false; |
| } |
| close(fd); |
| return true; |
| } |
| |
| static int inject_fault(int nth) |
| { |
| int fd; |
| char buf[128]; |
| |
| sprintf(buf, "/proc/self/task/%d/fail-nth", (int)syscall(SYS_gettid)); |
| fd = open(buf, O_RDWR); |
| if (fd == -1) |
| fail("failed to open /proc/self/task/tid/fail-nth"); |
| sprintf(buf, "%d", nth + 1); |
| if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf)) |
| fail("failed to write /proc/self/task/tid/fail-nth"); |
| return fd; |
| } |
| |
| long r[64]; |
| void loop() |
| { |
| memset(r, -1, sizeof(r)); |
| r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul, |
| 0xfffffffffffffffful, 0x0ul); |
| *(uint32_t*)0x2001d000 = (uint32_t)0x2; |
| *(uint32_t*)0x2001d004 = (uint32_t)0x78; |
| *(uint8_t*)0x2001d008 = (uint8_t)0xe2; |
| *(uint8_t*)0x2001d009 = (uint8_t)0x0; |
| *(uint8_t*)0x2001d00a = (uint8_t)0x0; |
| *(uint8_t*)0x2001d00b = (uint8_t)0x0; |
| *(uint32_t*)0x2001d00c = (uint32_t)0x0; |
| *(uint64_t*)0x2001d010 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d018 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d020 = (uint64_t)0x0; |
| *(uint8_t*)0x2001d028 = (uint8_t)0x80000040fe; |
| *(uint8_t*)0x2001d029 = (uint8_t)0x0; |
| *(uint8_t*)0x2001d02a = (uint8_t)0x0; |
| *(uint8_t*)0x2001d02b = (uint8_t)0x0; |
| *(uint32_t*)0x2001d02c = (uint32_t)0x0; |
| *(uint32_t*)0x2001d030 = (uint32_t)0x0; |
| *(uint32_t*)0x2001d034 = (uint32_t)0x0; |
| *(uint64_t*)0x2001d038 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d040 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d048 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d050 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d058 = (uint64_t)0x0; |
| *(uint32_t*)0x2001d060 = (uint32_t)0x0; |
| *(uint64_t*)0x2001d068 = (uint64_t)0x0; |
| *(uint32_t*)0x2001d070 = (uint32_t)0x0; |
| *(uint16_t*)0x2001d074 = (uint16_t)0x0; |
| *(uint16_t*)0x2001d076 = (uint16_t)0x0; |
| r[28] = syscall(__NR_perf_event_open, 0x2001d000ul, 0x0ul, 0x0ul, |
| 0xfffffffffffffffful, 0x0ul); |
| r[29] = syscall(__NR_socketpair, 0xaul, 0x1ul, 0x0ul, 0x20cf1000ul); |
| r[30] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x10ul, |
| 0xfffffffffffffffful, 0x0ul); |
| r[31] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x0ul, 0x0ul, |
| 0xfffffffffffffffful, 0x0ul); |
| *(uint32_t*)0x2001d000 = (uint32_t)0x2; |
| *(uint32_t*)0x2001d004 = (uint32_t)0x78; |
| *(uint8_t*)0x2001d008 = (uint8_t)0xde; |
| *(uint8_t*)0x2001d009 = (uint8_t)0x0; |
| *(uint8_t*)0x2001d00a = (uint8_t)0x0; |
| *(uint8_t*)0x2001d00b = (uint8_t)0x0; |
| *(uint32_t*)0x2001d00c = (uint32_t)0x0; |
| *(uint64_t*)0x2001d010 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d018 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d020 = (uint64_t)0x0; |
| *(uint8_t*)0x2001d028 = (uint8_t)0x0; |
| *(uint8_t*)0x2001d029 = (uint8_t)0x0; |
| *(uint8_t*)0x2001d02a = (uint8_t)0x0; |
| *(uint8_t*)0x2001d02b = (uint8_t)0x0; |
| *(uint32_t*)0x2001d02c = (uint32_t)0x0; |
| *(uint32_t*)0x2001d030 = (uint32_t)0x0; |
| *(uint32_t*)0x2001d034 = (uint32_t)0x0; |
| *(uint64_t*)0x2001d038 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d040 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d048 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d050 = (uint64_t)0x0; |
| *(uint64_t*)0x2001d058 = (uint64_t)0x0; |
| *(uint32_t*)0x2001d060 = (uint32_t)0x0; |
| *(uint64_t*)0x2001d068 = (uint64_t)0x0; |
| *(uint32_t*)0x2001d070 = (uint32_t)0x0; |
| *(uint16_t*)0x2001d074 = (uint16_t)0x0; |
| *(uint16_t*)0x2001d076 = (uint16_t)0x0; |
| r[59] = syscall(__NR_perf_event_open, 0x2001d000ul, 0x0ul, |
| 0xfffffffffffffffful, 0xfffffffffffffffful, 0x0ul); |
| r[60] = syscall(__NR_gettid); |
| r[61] = syscall(__NR_socketpair, 0xaul, 0x1ul, 0x1ul, 0x20535ff8ul); |
| r[62] = syscall(__NR_madvise, 0x20ec9000ul, 0x1000ul, 0xcul); |
| write_file("/sys/kernel/debug/failslab/ignore-gfp-wait", "N"); |
| write_file("/sys/kernel/debug/fail_futex/ignore-private", "N"); |
| inject_fault(4); |
| r[63] = syscall(__NR_clone, 0x0ul, 0x20218fa0ul, 0x20acc000ul, |
| 0x2097b000ul, 0x201fa000ul); |
| } |
| |
| int main() |
| { |
| loop(); |
| return 0; |
| } |