// https://syzkaller.appspot.com/bug?id=a5b80da4b4e7ebf2467ad2c3c4eb83d86f7163e9 // autogenerated by syzkaller (http://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include static uintptr_t syz_open_procfs(uintptr_t a0, uintptr_t a1) { char buf[128]; memset(buf, 0, sizeof(buf)); if (a0 == 0) { snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1); } else if (a0 == (uintptr_t)-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; } #ifndef __NR_mmap #define __NR_mmap 192 #endif #ifndef __NR_timer_create #define __NR_timer_create 259 #endif #ifndef __NR_preadv #define __NR_preadv 333 #endif #undef __NR_mmap #define __NR_mmap __NR_mmap2 long r[20]; void loop() { memset(r, -1, sizeof(r)); r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); *(uint32_t*)0x20adafa0 = (uint32_t)0x0; *(uint32_t*)0x20adafa4 = (uint32_t)0x1c; *(uint32_t*)0x20adafa8 = (uint32_t)0x8; *(uint32_t*)0x20adafac = (uint32_t)0x2008d000; *(uint32_t*)0x20adafb0 = (uint32_t)0x201a2fa8; *(uint64_t*)0x20adafb8 = (uint64_t)0x0; *(uint64_t*)0x20adafc0 = (uint64_t)0x0; *(uint64_t*)0x20adafc8 = (uint64_t)0x0; *(uint64_t*)0x20adafd0 = (uint64_t)0x0; *(uint64_t*)0x20adafd8 = (uint64_t)0x0; *(uint64_t*)0x20adafe0 = (uint64_t)0x0; *(uint64_t*)0x20adafe8 = (uint64_t)0x0; *(uint64_t*)0x20adaff0 = (uint64_t)0x0; r[14] = syscall(__NR_timer_create, 0x7ul, 0x20adafa0ul, 0x2019cffcul); memcpy((void*)0x20337ff2, "\x74\x69\x6d\x65\x72\x73\x00", 7); r[16] = syz_open_procfs(0x0ul, 0x20337ff2ul); *(uint32_t*)0x205e2ff0 = (uint32_t)0x2036b000; *(uint32_t*)0x205e2ff4 = (uint32_t)0x64; r[19] = syscall(__NR_preadv, r[16], 0x205e2ff0ul, 0x1ul, 0x1000000000000ul); } int main() { loop(); return 0; }