// https://syzkaller.appspot.com/bug?id=8f063539d4ecf1faf3132624b57a641e923ee25a // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include static long syz_open_procfs(long a0, long a1) { char buf[128]; memset(buf, 0, sizeof(buf)); if (a0 == 0) { snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1); } else if (a0 == -1) { snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1); } else { snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1); } int fd = open(buf, O_RDWR); if (fd == -1) fd = open(buf, O_RDONLY); return fd; } uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); long res = 0; memcpy((void*)0x20000000, "/dev/kvm", 9); res = syscall(__NR_openat, 0xffffffffffffff9c, 0x20000000, 0, 0); if (res != -1) r[0] = res; res = syscall(__NR_ioctl, r[0], 0xae01, 0); if (res != -1) r[1] = res; res = syscall(__NR_ioctl, r[1], 0xae41, 0); if (res != -1) r[2] = res; *(uint32_t*)0x20000100 = 0xfffffffe; *(uint32_t*)0x20000104 = 0; *(uint64_t*)0x20000108 = 0; *(uint64_t*)0x20000110 = 0; *(uint64_t*)0x20000118 = 0; *(uint64_t*)0x20000120 = 0; *(uint8_t*)0x20000128 = 0; *(uint8_t*)0x20000129 = 0; *(uint8_t*)0x2000012a = 0; *(uint8_t*)0x2000012b = 0; *(uint8_t*)0x2000012c = 0; *(uint8_t*)0x2000012d = 0; *(uint8_t*)0x2000012e = 0; *(uint8_t*)0x2000012f = 0; *(uint8_t*)0x20000130 = 0; *(uint8_t*)0x20000131 = 0; *(uint8_t*)0x20000132 = 0; *(uint8_t*)0x20000133 = 0; *(uint8_t*)0x20000134 = 0; *(uint8_t*)0x20000135 = 0; *(uint8_t*)0x20000136 = 0; *(uint8_t*)0x20000137 = 0; *(uint8_t*)0x20000138 = 0; *(uint8_t*)0x20000139 = 0; *(uint8_t*)0x2000013a = 0; *(uint8_t*)0x2000013b = 0; *(uint8_t*)0x2000013c = 0; *(uint8_t*)0x2000013d = 0; *(uint8_t*)0x2000013e = 0; *(uint8_t*)0x2000013f = 0; *(uint8_t*)0x20000140 = 0; *(uint8_t*)0x20000141 = 0; *(uint8_t*)0x20000142 = 0; *(uint8_t*)0x20000143 = 0; *(uint8_t*)0x20000144 = 0; *(uint8_t*)0x20000145 = 0; *(uint8_t*)0x20000146 = 0; *(uint8_t*)0x20000147 = 0; *(uint8_t*)0x20000148 = 0; *(uint8_t*)0x20000149 = 0; *(uint8_t*)0x2000014a = 0; *(uint8_t*)0x2000014b = 0; *(uint8_t*)0x2000014c = 0; *(uint8_t*)0x2000014d = 0; *(uint8_t*)0x2000014e = 0; *(uint8_t*)0x2000014f = 0; *(uint8_t*)0x20000150 = 0; *(uint8_t*)0x20000151 = 0; *(uint8_t*)0x20000152 = 0; *(uint8_t*)0x20000153 = 0; *(uint8_t*)0x20000154 = 0; *(uint8_t*)0x20000155 = 0; *(uint8_t*)0x20000156 = 0; *(uint8_t*)0x20000157 = 0; *(uint8_t*)0x20000158 = 0; *(uint8_t*)0x20000159 = 0; *(uint8_t*)0x2000015a = 0; *(uint8_t*)0x2000015b = 0; *(uint8_t*)0x2000015c = 0; *(uint8_t*)0x2000015d = 0; *(uint8_t*)0x2000015e = 0; *(uint8_t*)0x2000015f = 0; *(uint8_t*)0x20000160 = 0; *(uint8_t*)0x20000161 = 0; *(uint8_t*)0x20000162 = 0; *(uint8_t*)0x20000163 = 0; *(uint8_t*)0x20000164 = 0; *(uint8_t*)0x20000165 = 0; *(uint8_t*)0x20000166 = 0; *(uint8_t*)0x20000167 = 0; syscall(__NR_ioctl, r[2], 0xc080aebe, 0x20000100); syscall(__NR_quotactl, 0x80000106, 0, 0, 0x20000180); memcpy((void*)0x20000100, "coredump_filter", 16); syz_open_procfs(0, 0x20000100); return 0; }