// 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_dev(long a0, long a1, long a2) { if (a0 == 0xc || a0 == 0xb) { char buf[128]; sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, (uint8_t)a2); return open(buf, O_RDWR, 0); } else { char buf[1024]; char* hash; strncpy(buf, (char*)a0, sizeof(buf) - 1); buf[sizeof(buf) - 1] = 0; while ((hash = strchr(buf, '#'))) { *hash = '0' + (char)(a1 % 10); a1 /= 10; } return open(buf, a2, 0); } } #ifndef __NR_bpf #define __NR_bpf 321 #endif 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*)0x200000c0 = 0x7b; *(uint32_t*)0x200000c4 = 0xbff; *(uint64_t*)0x200000c8 = 0xc2; *(uint64_t*)0x200000d0 = 0; *(uint64_t*)0x200000d8 = 0x40000105; *(uint64_t*)0x200000e0 = 0; *(uint8_t*)0x200000e8 = 0; *(uint8_t*)0x200000e9 = 0; *(uint8_t*)0x200000ea = 0; *(uint8_t*)0x200000eb = 0; *(uint8_t*)0x200000ec = 0; *(uint8_t*)0x200000ed = 0; *(uint8_t*)0x200000ee = 0; *(uint8_t*)0x200000ef = 0; *(uint8_t*)0x200000f0 = 0; *(uint8_t*)0x200000f1 = 0; *(uint8_t*)0x200000f2 = 0; *(uint8_t*)0x200000f3 = 0; *(uint8_t*)0x200000f4 = 0; *(uint8_t*)0x200000f5 = 0; *(uint8_t*)0x200000f6 = 0; *(uint8_t*)0x200000f7 = 0; *(uint8_t*)0x200000f8 = 0; *(uint8_t*)0x200000f9 = 0; *(uint8_t*)0x200000fa = 0; *(uint8_t*)0x200000fb = 0; *(uint8_t*)0x200000fc = 0; *(uint8_t*)0x200000fd = 0; *(uint8_t*)0x200000fe = 0; *(uint8_t*)0x200000ff = 0; *(uint8_t*)0x20000100 = 0; *(uint8_t*)0x20000101 = 0; *(uint8_t*)0x20000102 = 0; *(uint8_t*)0x20000103 = 0; *(uint8_t*)0x20000104 = 0; *(uint8_t*)0x20000105 = 0; *(uint8_t*)0x20000106 = 0; *(uint8_t*)0x20000107 = 0; *(uint8_t*)0x20000108 = 0; *(uint8_t*)0x20000109 = 0; *(uint8_t*)0x2000010a = 0; *(uint8_t*)0x2000010b = 0; *(uint8_t*)0x2000010c = 0; *(uint8_t*)0x2000010d = 0; *(uint8_t*)0x2000010e = 0; *(uint8_t*)0x2000010f = 0; *(uint8_t*)0x20000110 = 0; *(uint8_t*)0x20000111 = 0; *(uint8_t*)0x20000112 = 0; *(uint8_t*)0x20000113 = 0; *(uint8_t*)0x20000114 = 0; *(uint8_t*)0x20000115 = 0; *(uint8_t*)0x20000116 = 0; *(uint8_t*)0x20000117 = 0; *(uint8_t*)0x20000118 = 0; *(uint8_t*)0x20000119 = 0; *(uint8_t*)0x2000011a = 0; *(uint8_t*)0x2000011b = 0; *(uint8_t*)0x2000011c = 0; *(uint8_t*)0x2000011d = 0; *(uint8_t*)0x2000011e = 0; *(uint8_t*)0x2000011f = 0; *(uint8_t*)0x20000120 = 0; *(uint8_t*)0x20000121 = 0; *(uint8_t*)0x20000122 = 0; *(uint8_t*)0x20000123 = 0; *(uint8_t*)0x20000124 = 0; *(uint8_t*)0x20000125 = 0; *(uint8_t*)0x20000126 = 0; *(uint8_t*)0x20000127 = 0; syscall(__NR_ioctl, r[2], 0x4080aebf, 0x200000c0); syscall(__NR_socket, 0x26, 5, 0); *(uint16_t*)0x20000140 = 0x91d; *(uint16_t*)0x20000142 = 0x1ff; *(uint16_t*)0x20000144 = 0x651; *(uint16_t*)0x20000146 = 1; *(uint8_t*)0x20000148 = 7; *(uint8_t*)0x20000149 = 3; *(uint8_t*)0x2000014a = 0xf8; *(uint8_t*)0x2000014b = 0x7f; *(uint32_t*)0x2000014c = 0xffe; *(uint8_t*)0x20000150 = 0; syscall(__NR_ioctl, -1, 0x5406, 0x20000140); *(uint64_t*)0x20000380 = 0x20000140; *(uint16_t*)0x20000140 = 4; *(uint16_t*)0x20000142 = htobe16(1); *(uint32_t*)0x20000144 = htobe32(0); memcpy((void*)0x20000148, "\x09\x50\xfe\x4a\xdb\xa7", 6); *(uint8_t*)0x2000014e = 0; *(uint8_t*)0x2000014f = 0; *(uint32_t*)0x20000388 = 0x16; *(uint64_t*)0x20000390 = 0x20000000; *(uint64_t*)0x20000398 = 0; *(uint64_t*)0x200003a0 = 0x20000240; *(uint64_t*)0x200003a8 = 0; *(uint32_t*)0x200003b0 = 0; syscall(__NR_sendmsg, -1, 0x20000380, 0); syscall(__NR_fstat, -1, 0x20000000); syscall(__NR_fchown, -1, 0, 0); *(uint32_t*)0x20000340 = 6; *(uint32_t*)0x20000344 = 4; *(uint32_t*)0x20000348 = 0x84; *(uint32_t*)0x2000034c = 9; *(uint32_t*)0x20000350 = 0; *(uint32_t*)0x20000354 = -1; *(uint32_t*)0x20000358 = 0; *(uint8_t*)0x2000035c = 0; *(uint8_t*)0x2000035d = 0; *(uint8_t*)0x2000035e = 0; *(uint8_t*)0x2000035f = 0; *(uint8_t*)0x20000360 = 0; *(uint8_t*)0x20000361 = 0; *(uint8_t*)0x20000362 = 0; *(uint8_t*)0x20000363 = 0; *(uint8_t*)0x20000364 = 0; *(uint8_t*)0x20000365 = 0; *(uint8_t*)0x20000366 = 0; *(uint8_t*)0x20000367 = 0; *(uint8_t*)0x20000368 = 0; *(uint8_t*)0x20000369 = 0; *(uint8_t*)0x2000036a = 0; *(uint8_t*)0x2000036b = 0; syscall(__NR_bpf, 0, 0x20000340, 0x2c); memcpy((void*)0x20000080, "/dev/dmmidi#", 13); syz_open_dev(0x20000080, 5, 0x40); *(uint32_t*)0x20002780 = 0xe8; syscall(__NR_getsockopt, -1, 0x29, 0x22, 0x20002680, 0x20002780); syscall(__NR_getgid); memcpy((void*)0x20003c80, "./file0", 8); syscall(__NR_lstat, 0x20003c80, 0x20003cc0); memcpy((void*)0x20003f00, "./file0", 8); syscall(__NR_lstat, 0x20003f00, 0x20003f40); *(uint32_t*)0x20000800 = 0xc; syscall(__NR_getsockopt, -1, 0, 0x27, 0x200007c0, 0x20000800); syscall(__NR_ioctl, -1, 0x200000000008912, 0x20000080); *(uint64_t*)0x203bbfc8 = 0x20fdbf80; *(uint16_t*)0x20fdbf80 = 0x1e; memcpy((void*)0x20fdbf82, "\x02\xff\x01\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x0a\xe7\x7f" "\x5b\xf8\x6c\x48\x02\x00\x02\x00\x00\x00\xf1\xff\xff\xff\x00\x9a\x48" "\x00\x75\xe6\xa5\x00\x00\xde\x01\x03\x00\x00\x00\x00\xe4\xff\x06\x4b" "\x3f\x01\x3a\x00\x00\x00\x08\x00\x00\x00\x8f\x00\x00\x00\x00\xac\x50" "\xd5\xfe\x32\xc4\x00\x00\x00\x00\x7f\xff\xff\xff\x6a\x00\x83\x56\xed" "\xb9\xa6\x34\x1c\x1f\xd4\x56\x24\x28\x1e\x00\x07\x0e\xcd\xdd\x02\x06" "\xc3\x97\x50\xc4\x00\x00\xfd\x00\x00\x09\x00\x00\x00\x00\x00\x0b\x00" "\x00\xdb\x00\x00\x04\xda\x36", 126); *(uint32_t*)0x203bbfd0 = 0x2ef; *(uint64_t*)0x203bbfd8 = 0x20d1b000; *(uint64_t*)0x203bbfe0 = 0; *(uint64_t*)0x203bbfe8 = 0x2012e000; *(uint64_t*)0x203bbff0 = 0; *(uint32_t*)0x203bbff8 = 0; syscall(__NR_sendmsg, -1, 0x203bbfc8, 0); *(uint32_t*)0x20000080 = 0xc; *(uint16_t*)0x20000084 = 8; *(uint16_t*)0x20000086 = 0xfa00; *(uint64_t*)0x20000088 = 0x20000380; syscall(__NR_write, -1, 0x20000080, 0xffffff01); *(uint16_t*)0x20000000 = 0x11; *(uint16_t*)0x20000002 = htobe16(0xc); *(uint32_t*)0x20000004 = 0; *(uint16_t*)0x20000008 = 1; *(uint8_t*)0x2000000a = 0; *(uint8_t*)0x2000000b = 6; *(uint8_t*)0x2000000c = 0; *(uint8_t*)0x2000000d = 0; *(uint8_t*)0x2000000e = 0; *(uint8_t*)0x2000000f = 0; *(uint8_t*)0x20000010 = 0; *(uint8_t*)0x20000011 = 0; *(uint8_t*)0x20000012 = 0; *(uint8_t*)0x20000013 = 0; syscall(__NR_bind, -1, 0x20000000, 0x14); *(uint32_t*)0x200000c0 = 0; *(uint16_t*)0x200000c4 = 5; *(uint16_t*)0x200000c6 = -1; syscall(__NR_setsockopt, -1, 0x84, 0x79, 0x200000c0, 8); memcpy((void*)0x20000000, "/dev/loop#", 11); syz_open_dev(0x20000000, 0, 0); syscall(__NR_ioctl, -1, 0xaf01, 0); syscall(__NR_ioctl, -1, 0xae41, 0); syscall(__NR_ioctl, -1, 0x4004556a, 0x104); return 0; }