| // https://syzkaller.appspot.com/bug?id=5c9918d20f771265ad0ffae3c8f3859d24850692 |
| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #include <endian.h> |
| #include <fcntl.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/mman.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #define SIZEOF_IO_URING_SQE 64 |
| #define SIZEOF_IO_URING_CQE 16 |
| #define SQ_HEAD_OFFSET 0 |
| #define SQ_TAIL_OFFSET 64 |
| #define SQ_RING_MASK_OFFSET 256 |
| #define SQ_RING_ENTRIES_OFFSET 264 |
| #define SQ_FLAGS_OFFSET 276 |
| #define SQ_DROPPED_OFFSET 272 |
| #define CQ_HEAD_OFFSET 128 |
| #define CQ_TAIL_OFFSET 192 |
| #define CQ_RING_MASK_OFFSET 260 |
| #define CQ_RING_ENTRIES_OFFSET 268 |
| #define CQ_RING_OVERFLOW_OFFSET 284 |
| #define CQ_FLAGS_OFFSET 280 |
| #define CQ_CQES_OFFSET 320 |
| |
| struct io_sqring_offsets { |
| uint32_t head; |
| uint32_t tail; |
| uint32_t ring_mask; |
| uint32_t ring_entries; |
| uint32_t flags; |
| uint32_t dropped; |
| uint32_t array; |
| uint32_t resv1; |
| uint64_t resv2; |
| }; |
| |
| struct io_cqring_offsets { |
| uint32_t head; |
| uint32_t tail; |
| uint32_t ring_mask; |
| uint32_t ring_entries; |
| uint32_t overflow; |
| uint32_t cqes; |
| uint64_t resv[2]; |
| }; |
| |
| struct io_uring_params { |
| uint32_t sq_entries; |
| uint32_t cq_entries; |
| uint32_t flags; |
| uint32_t sq_thread_cpu; |
| uint32_t sq_thread_idle; |
| uint32_t features; |
| uint32_t resv[4]; |
| struct io_sqring_offsets sq_off; |
| struct io_cqring_offsets cq_off; |
| }; |
| |
| #define IORING_OFF_SQ_RING 0 |
| #define IORING_OFF_SQES 0x10000000ULL |
| |
| #define __NR_io_uring_setup 425 |
| static long syz_io_uring_setup(volatile long a0, volatile long a1, |
| volatile long a2, volatile long a3, |
| volatile long a4, volatile long a5) |
| { |
| uint32_t entries = (uint32_t)a0; |
| struct io_uring_params* setup_params = (struct io_uring_params*)a1; |
| void* vma1 = (void*)a2; |
| void* vma2 = (void*)a3; |
| void** ring_ptr_out = (void**)a4; |
| void** sqes_ptr_out = (void**)a5; |
| uint32_t fd_io_uring = syscall(__NR_io_uring_setup, entries, setup_params); |
| uint32_t sq_ring_sz = |
| setup_params->sq_off.array + setup_params->sq_entries * sizeof(uint32_t); |
| uint32_t cq_ring_sz = setup_params->cq_off.cqes + |
| setup_params->cq_entries * SIZEOF_IO_URING_CQE; |
| uint32_t ring_sz = sq_ring_sz > cq_ring_sz ? sq_ring_sz : cq_ring_sz; |
| *ring_ptr_out = mmap(vma1, ring_sz, PROT_READ | PROT_WRITE, |
| MAP_SHARED | MAP_POPULATE | MAP_FIXED, fd_io_uring, |
| IORING_OFF_SQ_RING); |
| uint32_t sqes_sz = setup_params->sq_entries * SIZEOF_IO_URING_SQE; |
| *sqes_ptr_out = |
| mmap(vma2, sqes_sz, PROT_READ | PROT_WRITE, |
| MAP_SHARED | MAP_POPULATE | MAP_FIXED, fd_io_uring, IORING_OFF_SQES); |
| return fd_io_uring; |
| } |
| |
| static long syz_io_uring_submit(volatile long a0, volatile long a1, |
| volatile long a2, volatile long a3) |
| { |
| char* ring_ptr = (char*)a0; |
| char* sqes_ptr = (char*)a1; |
| char* sqe = (char*)a2; |
| uint32_t sqes_index = (uint32_t)a3; |
| uint32_t sq_ring_entries = *(uint32_t*)(ring_ptr + SQ_RING_ENTRIES_OFFSET); |
| uint32_t cq_ring_entries = *(uint32_t*)(ring_ptr + CQ_RING_ENTRIES_OFFSET); |
| uint32_t sq_array_off = |
| (CQ_CQES_OFFSET + cq_ring_entries * SIZEOF_IO_URING_CQE + 63) & ~63; |
| if (sq_ring_entries) |
| sqes_index %= sq_ring_entries; |
| char* sqe_dest = sqes_ptr + sqes_index * SIZEOF_IO_URING_SQE; |
| memcpy(sqe_dest, sqe, SIZEOF_IO_URING_SQE); |
| uint32_t sq_ring_mask = *(uint32_t*)(ring_ptr + SQ_RING_MASK_OFFSET); |
| uint32_t* sq_tail_ptr = (uint32_t*)(ring_ptr + SQ_TAIL_OFFSET); |
| uint32_t sq_tail = *sq_tail_ptr & sq_ring_mask; |
| uint32_t sq_tail_next = *sq_tail_ptr + 1; |
| uint32_t* sq_array = (uint32_t*)(ring_ptr + sq_array_off); |
| *(sq_array + sq_tail) = sqes_index; |
| __atomic_store_n(sq_tail_ptr, sq_tail_next, __ATOMIC_RELEASE); |
| return 0; |
| } |
| |
| 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); |
| } |
| } |
| |
| #ifndef __NR_io_uring_enter |
| #define __NR_io_uring_enter 426 |
| #endif |
| |
| uint64_t r[4] = {0xffffffffffffffff, 0x0, 0x0, 0xffffffffffffffff}; |
| |
| int main(int argc, char *argv[]) |
| { |
| |
| if (argc > 1) |
| return 0; |
| |
| 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; |
| *(uint32_t*)0x20000484 = 0; |
| *(uint32_t*)0x20000488 = 0; |
| *(uint32_t*)0x2000048c = 0; |
| *(uint32_t*)0x20000490 = 0; |
| *(uint32_t*)0x20000498 = -1; |
| *(uint32_t*)0x2000049c = 0; |
| *(uint32_t*)0x200004a0 = 0; |
| *(uint32_t*)0x200004a4 = 0; |
| res = -1; |
| res = syz_io_uring_setup(0x6ad4, 0x20000480, 0x20ee7000, 0x20ffb000, |
| 0x20000180, 0x20000040); |
| if (res != -1) { |
| r[0] = res; |
| r[1] = *(uint64_t*)0x20000180; |
| r[2] = *(uint64_t*)0x20000040; |
| } |
| res = -1; |
| res = syz_open_dev(0xc, 4, 0x15); |
| if (res != -1) |
| r[3] = res; |
| *(uint8_t*)0x20000000 = 6; |
| *(uint8_t*)0x20000001 = 0; |
| *(uint16_t*)0x20000002 = 0; |
| *(uint32_t*)0x20000004 = r[3]; |
| *(uint64_t*)0x20000008 = 0; |
| *(uint64_t*)0x20000010 = 0; |
| *(uint32_t*)0x20000018 = 0; |
| *(uint16_t*)0x2000001c = 0; |
| *(uint16_t*)0x2000001e = 0; |
| *(uint64_t*)0x20000020 = 0; |
| *(uint16_t*)0x20000028 = 0; |
| *(uint16_t*)0x2000002a = 0; |
| *(uint8_t*)0x2000002c = 0; |
| *(uint8_t*)0x2000002d = 0; |
| *(uint8_t*)0x2000002e = 0; |
| *(uint8_t*)0x2000002f = 0; |
| *(uint8_t*)0x20000030 = 0; |
| *(uint8_t*)0x20000031 = 0; |
| *(uint8_t*)0x20000032 = 0; |
| *(uint8_t*)0x20000033 = 0; |
| *(uint8_t*)0x20000034 = 0; |
| *(uint8_t*)0x20000035 = 0; |
| *(uint8_t*)0x20000036 = 0; |
| *(uint8_t*)0x20000037 = 0; |
| *(uint8_t*)0x20000038 = 0; |
| *(uint8_t*)0x20000039 = 0; |
| *(uint8_t*)0x2000003a = 0; |
| *(uint8_t*)0x2000003b = 0; |
| *(uint8_t*)0x2000003c = 0; |
| *(uint8_t*)0x2000003d = 0; |
| *(uint8_t*)0x2000003e = 0; |
| *(uint8_t*)0x2000003f = 0; |
| syz_io_uring_submit(r[1], r[2], 0x20000000, 0); |
| syscall(__NR_io_uring_enter, r[0], 0x20450c, 0, 0ul, 0ul, 0ul); |
| *(uint32_t*)0x20000080 = 0x7ff; |
| *(uint32_t*)0x20000084 = 0x8b7; |
| *(uint32_t*)0x20000088 = 3; |
| *(uint32_t*)0x2000008c = 0x101; |
| *(uint8_t*)0x20000090 = 9; |
| memcpy((void*)0x20000091, "\xaf\x09\x01\xbc\xf9\xc6\xe4\x92\x86\x51\x7d\x7f" |
| "\xbd\x43\x7d\x16\x69\x3e\x05", |
| 19); |
| syscall(__NR_ioctl, r[3], 0x5404, 0x20000080ul); |
| return 0; |
| } |