// https://syzkaller.appspot.com/bug?id=4694bd1c1c0019f067af5b6e14e8ef02431b6b34 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #ifndef __NR_bpf #define __NR_bpf 321 #endif static long syz_open_dev(volatile long a0, volatile long a1, volatile 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); } } uint64_t r[1] = {0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); intptr_t res = 0; *(uint64_t*)0x20000240 = 0; *(uint32_t*)0x20000248 = -1; syscall(__NR_bpf, 0x11ul, 0x20000240ul, 0x10ul); memcpy((void*)0x20000180, "/dev/sg#\000", 9); res = -1; res = syz_open_dev(0x20000180, 0, 0x805); if (res != -1) r[0] = res; *(uint64_t*)0x20000040 = 0x200001c0; memcpy((void*)0x200001c0, "\xae\x09\x09\x00\x00\x20\x00\x00\x00\x90\xf5\x7f\x07\x70\x30\xef\xf0" "\xf6\x4e\xbb\xee\xd9\x0c\xf4\x1b\xdd\x2a\xc8\xbb\x8c\x43\xb4\x60\xe4" "\x62\x92\xd2\x51\x33\x27\x0b\x44\x53\x93\xec\x19", 46); *(uint64_t*)0x20000048 = 0x2e; *(uint64_t*)0x20000050 = 0x200000c0; memcpy((void*)0x200000c0, "\x53\x00\x00\x00\xfc\xff\xff\xff\x1b\x04\x48\x00\x2d\x14\x07\x00\x20" "\x02\x00\x20\x00\x00\x00\x00\x00\x00\x67\x20\x00\x00\x00\x00\x00\x00" "\x00\x00", 36); *(uint64_t*)0x20000058 = 0x200000e4; syscall(__NR_writev, r[0], 0x20000040ul, 2ul); return 0; }