// https://syzkaller.appspot.com/bug?id=3d4b7e9333d9d32e27123c8a12948a11128c64c6 // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __NR_io_uring_enter #define __NR_io_uring_enter 426 #endif #ifndef __NR_io_uring_setup #define __NR_io_uring_setup 425 #endif #ifndef __NR_memfd_create #define __NR_memfd_create 319 #endif static unsigned long long procid; static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { int state; } event_t; static void event_init(event_t* ev) { ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { if (ev->state) exit(1); __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE); syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000); } static void event_wait(event_t* ev) { while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0); } static int event_isset(event_t* ev) { return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE); } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; for (;;) { uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts); if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) return 1; now = current_time_ms(); if (now - start > timeout) return 0; } } static bool write_file(const char* file, const char* what, ...) { char buf[1024]; va_list args; va_start(args, what); vsnprintf(buf, sizeof(buf), what, args); va_end(args); buf[sizeof(buf) - 1] = 0; int len = strlen(buf); int fd = open(file, O_WRONLY | O_CLOEXEC); if (fd == -1) return false; if (write(fd, buf, len) != len) { int err = errno; close(fd); errno = err; return false; } close(fd); return true; } #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 IORING_SETUP_SQE128 (1U << 10) #define IORING_SETUP_CQE32 (1U << 11) static long syz_io_uring_setup(volatile long a0, volatile long a1, volatile long a2, volatile long a3) { uint32_t entries = (uint32_t)a0; struct io_uring_params* setup_params = (struct io_uring_params*)a1; void** ring_ptr_out = (void**)a2; void** sqes_ptr_out = (void**)a3; setup_params->flags &= ~(IORING_SETUP_CQE32 | IORING_SETUP_SQE128); 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(0, ring_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd_io_uring, IORING_OFF_SQ_RING); uint32_t sqes_sz = setup_params->sq_entries * SIZEOF_IO_URING_SQE; *sqes_ptr_out = mmap(0, sqes_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd_io_uring, IORING_OFF_SQES); uint32_t* array = (uint32_t*)((uintptr_t)*ring_ptr_out + setup_params->sq_off.array); for (uint32_t index = 0; index < entries; index++) array[index] = index; return fd_io_uring; } static long syz_memcpy_off(volatile long a0, volatile long a1, volatile long a2, volatile long a3, volatile long a4) { char* dest = (char*)a0; uint32_t dest_off = (uint32_t)a1; char* src = (char*)a2; uint32_t src_off = (uint32_t)a3; size_t n = (size_t)a4; return (long)memcpy(dest + dest_off, src + src_off, n); } #define USB_MAX_IFACE_NUM 4 #define USB_MAX_EP_NUM 32 #define USB_MAX_FDS 6 struct usb_endpoint_index { struct usb_endpoint_descriptor desc; int handle; }; struct usb_iface_index { struct usb_interface_descriptor* iface; uint8_t bInterfaceNumber; uint8_t bAlternateSetting; uint8_t bInterfaceClass; struct usb_endpoint_index eps[USB_MAX_EP_NUM]; int eps_num; }; struct usb_device_index { struct usb_device_descriptor* dev; struct usb_config_descriptor* config; uint8_t bDeviceClass; uint8_t bMaxPower; int config_length; struct usb_iface_index ifaces[USB_MAX_IFACE_NUM]; int ifaces_num; int iface_cur; }; struct usb_info { int fd; struct usb_device_index index; }; static struct usb_info usb_devices[USB_MAX_FDS]; static struct usb_device_index* lookup_usb_index(int fd) { for (int i = 0; i < USB_MAX_FDS; i++) { if (__atomic_load_n(&usb_devices[i].fd, __ATOMIC_ACQUIRE) == fd) return &usb_devices[i].index; } return NULL; } struct vusb_connect_string_descriptor { uint32_t len; char* str; } __attribute__((packed)); struct vusb_connect_descriptors { uint32_t qual_len; char* qual; uint32_t bos_len; char* bos; uint32_t strs_len; struct vusb_connect_string_descriptor strs[0]; } __attribute__((packed)); typedef bool (*lookup_connect_out_response_t)( int fd, const struct vusb_connect_descriptors* descs, const struct usb_ctrlrequest* ctrl, bool* done); struct vusb_descriptor { uint8_t req_type; uint8_t desc_type; uint32_t len; char data[0]; } __attribute__((packed)); struct vusb_descriptors { uint32_t len; struct vusb_descriptor* generic; struct vusb_descriptor* descs[0]; } __attribute__((packed)); struct vusb_response { uint8_t type; uint8_t req; uint32_t len; char data[0]; } __attribute__((packed)); struct vusb_responses { uint32_t len; struct vusb_response* generic; struct vusb_response* resps[0]; } __attribute__((packed)); static bool lookup_control_response(const struct vusb_descriptors* descs, const struct vusb_responses* resps, struct usb_ctrlrequest* ctrl, char** response_data, uint32_t* response_length) { int descs_num = 0; int resps_num = 0; if (descs) descs_num = (descs->len - offsetof(struct vusb_descriptors, descs)) / sizeof(descs->descs[0]); if (resps) resps_num = (resps->len - offsetof(struct vusb_responses, resps)) / sizeof(resps->resps[0]); uint8_t req = ctrl->bRequest; uint8_t req_type = ctrl->bRequestType & USB_TYPE_MASK; uint8_t desc_type = ctrl->wValue >> 8; if (req == USB_REQ_GET_DESCRIPTOR) { int i; for (i = 0; i < descs_num; i++) { struct vusb_descriptor* desc = descs->descs[i]; if (!desc) continue; if (desc->req_type == req_type && desc->desc_type == desc_type) { *response_length = desc->len; if (*response_length != 0) *response_data = &desc->data[0]; else *response_data = NULL; return true; } } if (descs && descs->generic) { *response_data = &descs->generic->data[0]; *response_length = descs->generic->len; return true; } } else { int i; for (i = 0; i < resps_num; i++) { struct vusb_response* resp = resps->resps[i]; if (!resp) continue; if (resp->type == req_type && resp->req == req) { *response_length = resp->len; if (*response_length != 0) *response_data = &resp->data[0]; else *response_data = NULL; return true; } } if (resps && resps->generic) { *response_data = &resps->generic->data[0]; *response_length = resps->generic->len; return true; } } return false; } #define UDC_NAME_LENGTH_MAX 128 struct usb_raw_init { __u8 driver_name[UDC_NAME_LENGTH_MAX]; __u8 device_name[UDC_NAME_LENGTH_MAX]; __u8 speed; }; enum usb_raw_event_type { USB_RAW_EVENT_INVALID = 0, USB_RAW_EVENT_CONNECT = 1, USB_RAW_EVENT_CONTROL = 2, }; struct usb_raw_event { __u32 type; __u32 length; __u8 data[0]; }; struct usb_raw_ep_io { __u16 ep; __u16 flags; __u32 length; __u8 data[0]; }; #define USB_RAW_EPS_NUM_MAX 30 #define USB_RAW_EP_NAME_MAX 16 #define USB_RAW_EP_ADDR_ANY 0xff struct usb_raw_ep_caps { __u32 type_control : 1; __u32 type_iso : 1; __u32 type_bulk : 1; __u32 type_int : 1; __u32 dir_in : 1; __u32 dir_out : 1; }; struct usb_raw_ep_limits { __u16 maxpacket_limit; __u16 max_streams; __u32 reserved; }; struct usb_raw_ep_info { __u8 name[USB_RAW_EP_NAME_MAX]; __u32 addr; struct usb_raw_ep_caps caps; struct usb_raw_ep_limits limits; }; struct usb_raw_eps_info { struct usb_raw_ep_info eps[USB_RAW_EPS_NUM_MAX]; }; #define USB_RAW_IOCTL_INIT _IOW('U', 0, struct usb_raw_init) #define USB_RAW_IOCTL_RUN _IO('U', 1) #define USB_RAW_IOCTL_EVENT_FETCH _IOR('U', 2, struct usb_raw_event) #define USB_RAW_IOCTL_EP0_WRITE _IOW('U', 3, struct usb_raw_ep_io) #define USB_RAW_IOCTL_EP0_READ _IOWR('U', 4, struct usb_raw_ep_io) #define USB_RAW_IOCTL_EP_ENABLE _IOW('U', 5, struct usb_endpoint_descriptor) #define USB_RAW_IOCTL_EP_DISABLE _IOW('U', 6, __u32) #define USB_RAW_IOCTL_EP_WRITE _IOW('U', 7, struct usb_raw_ep_io) #define USB_RAW_IOCTL_EP_READ _IOWR('U', 8, struct usb_raw_ep_io) #define USB_RAW_IOCTL_CONFIGURE _IO('U', 9) #define USB_RAW_IOCTL_VBUS_DRAW _IOW('U', 10, __u32) #define USB_RAW_IOCTL_EPS_INFO _IOR('U', 11, struct usb_raw_eps_info) #define USB_RAW_IOCTL_EP0_STALL _IO('U', 12) #define USB_RAW_IOCTL_EP_SET_HALT _IOW('U', 13, __u32) #define USB_RAW_IOCTL_EP_CLEAR_HALT _IOW('U', 14, __u32) #define USB_RAW_IOCTL_EP_SET_WEDGE _IOW('U', 15, __u32) static int usb_raw_ep0_write(int fd, struct usb_raw_ep_io* io) { return ioctl(fd, USB_RAW_IOCTL_EP0_WRITE, io); } static int usb_raw_ep0_read(int fd, struct usb_raw_ep_io* io) { return ioctl(fd, USB_RAW_IOCTL_EP0_READ, io); } static int usb_raw_event_fetch(int fd, struct usb_raw_event* event) { return ioctl(fd, USB_RAW_IOCTL_EVENT_FETCH, event); } static int usb_raw_ep_enable(int fd, struct usb_endpoint_descriptor* desc) { return ioctl(fd, USB_RAW_IOCTL_EP_ENABLE, desc); } static int usb_raw_ep_disable(int fd, int ep) { return ioctl(fd, USB_RAW_IOCTL_EP_DISABLE, ep); } static int usb_raw_ep0_stall(int fd) { return ioctl(fd, USB_RAW_IOCTL_EP0_STALL, 0); } static int lookup_interface(int fd, uint8_t bInterfaceNumber, uint8_t bAlternateSetting) { struct usb_device_index* index = lookup_usb_index(fd); if (!index) return -1; for (int i = 0; i < index->ifaces_num; i++) { if (index->ifaces[i].bInterfaceNumber == bInterfaceNumber && index->ifaces[i].bAlternateSetting == bAlternateSetting) return i; } return -1; } #define USB_MAX_PACKET_SIZE 4096 struct usb_raw_control_event { struct usb_raw_event inner; struct usb_ctrlrequest ctrl; char data[USB_MAX_PACKET_SIZE]; }; struct usb_raw_ep_io_data { struct usb_raw_ep_io inner; char data[USB_MAX_PACKET_SIZE]; }; static void set_interface(int fd, int n) { struct usb_device_index* index = lookup_usb_index(fd); if (!index) return; if (index->iface_cur >= 0 && index->iface_cur < index->ifaces_num) { for (int ep = 0; ep < index->ifaces[index->iface_cur].eps_num; ep++) { int rv = usb_raw_ep_disable( fd, index->ifaces[index->iface_cur].eps[ep].handle); if (rv < 0) { } else { } } } if (n >= 0 && n < index->ifaces_num) { for (int ep = 0; ep < index->ifaces[n].eps_num; ep++) { int rv = usb_raw_ep_enable(fd, &index->ifaces[n].eps[ep].desc); if (rv < 0) { } else { index->ifaces[n].eps[ep].handle = rv; } } index->iface_cur = n; } } static volatile long syz_usb_control_io(volatile long a0, volatile long a1, volatile long a2) { int fd = a0; const struct vusb_descriptors* descs = (const struct vusb_descriptors*)a1; const struct vusb_responses* resps = (const struct vusb_responses*)a2; struct usb_raw_control_event event; event.inner.type = 0; event.inner.length = USB_MAX_PACKET_SIZE; int rv = usb_raw_event_fetch(fd, (struct usb_raw_event*)&event); if (rv < 0) { return rv; } if (event.inner.type != USB_RAW_EVENT_CONTROL) { return -1; } char* response_data = NULL; uint32_t response_length = 0; if ((event.ctrl.bRequestType & USB_DIR_IN) && event.ctrl.wLength) { if (!lookup_control_response(descs, resps, &event.ctrl, &response_data, &response_length)) { usb_raw_ep0_stall(fd); return -1; } } else { if ((event.ctrl.bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD || event.ctrl.bRequest == USB_REQ_SET_INTERFACE) { int iface_num = event.ctrl.wIndex; int alt_set = event.ctrl.wValue; int iface_index = lookup_interface(fd, iface_num, alt_set); if (iface_index < 0) { } else { set_interface(fd, iface_index); } } response_length = event.ctrl.wLength; } struct usb_raw_ep_io_data response; response.inner.ep = 0; response.inner.flags = 0; if (response_length > sizeof(response.data)) response_length = 0; if (event.ctrl.wLength < response_length) response_length = event.ctrl.wLength; if ((event.ctrl.bRequestType & USB_DIR_IN) && !event.ctrl.wLength) { response_length = USB_MAX_PACKET_SIZE; } response.inner.length = response_length; if (response_data) memcpy(&response.data[0], response_data, response_length); else memset(&response.data[0], 0, response_length); if ((event.ctrl.bRequestType & USB_DIR_IN) && event.ctrl.wLength) { rv = usb_raw_ep0_write(fd, (struct usb_raw_ep_io*)&response); } else { rv = usb_raw_ep0_read(fd, (struct usb_raw_ep_io*)&response); } if (rv < 0) { return rv; } sleep_ms(200); return 0; } //% This code is derived from puff.{c,h}, found in the zlib development. The //% original files come with the following copyright notice: //% Copyright (C) 2002-2013 Mark Adler, all rights reserved //% version 2.3, 21 Jan 2013 //% This software is provided 'as-is', without any express or implied //% warranty. In no event will the author be held liable for any damages //% arising from the use of this software. //% Permission is granted to anyone to use this software for any purpose, //% including commercial applications, and to alter it and redistribute it //% freely, subject to the following restrictions: //% 1. The origin of this software must not be misrepresented; you must not //% claim that you wrote the original software. If you use this software //% in a product, an acknowledgment in the product documentation would be //% appreciated but is not required. //% 2. Altered source versions must be plainly marked as such, and must not be //% misrepresented as being the original software. //% 3. This notice may not be removed or altered from any source distribution. //% Mark Adler madler@alumni.caltech.edu //% BEGIN CODE DERIVED FROM puff.{c,h} #define MAXBITS 15 #define MAXLCODES 286 #define MAXDCODES 30 #define MAXCODES (MAXLCODES + MAXDCODES) #define FIXLCODES 288 struct puff_state { unsigned char* out; unsigned long outlen; unsigned long outcnt; const unsigned char* in; unsigned long inlen; unsigned long incnt; int bitbuf; int bitcnt; jmp_buf env; }; static int puff_bits(struct puff_state* s, int need) { long val = s->bitbuf; while (s->bitcnt < need) { if (s->incnt == s->inlen) longjmp(s->env, 1); val |= (long)(s->in[s->incnt++]) << s->bitcnt; s->bitcnt += 8; } s->bitbuf = (int)(val >> need); s->bitcnt -= need; return (int)(val & ((1L << need) - 1)); } static int puff_stored(struct puff_state* s) { s->bitbuf = 0; s->bitcnt = 0; if (s->incnt + 4 > s->inlen) return 2; unsigned len = s->in[s->incnt++]; len |= s->in[s->incnt++] << 8; if (s->in[s->incnt++] != (~len & 0xff) || s->in[s->incnt++] != ((~len >> 8) & 0xff)) return -2; if (s->incnt + len > s->inlen) return 2; if (s->outcnt + len > s->outlen) return 1; for (; len--; s->outcnt++, s->incnt++) { if (s->in[s->incnt]) s->out[s->outcnt] = s->in[s->incnt]; } return 0; } struct puff_huffman { short* count; short* symbol; }; static int puff_decode(struct puff_state* s, const struct puff_huffman* h) { int first = 0; int index = 0; int bitbuf = s->bitbuf; int left = s->bitcnt; int code = first = index = 0; int len = 1; short* next = h->count + 1; while (1) { while (left--) { code |= bitbuf & 1; bitbuf >>= 1; int count = *next++; if (code - count < first) { s->bitbuf = bitbuf; s->bitcnt = (s->bitcnt - len) & 7; return h->symbol[index + (code - first)]; } index += count; first += count; first <<= 1; code <<= 1; len++; } left = (MAXBITS + 1) - len; if (left == 0) break; if (s->incnt == s->inlen) longjmp(s->env, 1); bitbuf = s->in[s->incnt++]; if (left > 8) left = 8; } return -10; } static int puff_construct(struct puff_huffman* h, const short* length, int n) { int len; for (len = 0; len <= MAXBITS; len++) h->count[len] = 0; int symbol; for (symbol = 0; symbol < n; symbol++) (h->count[length[symbol]])++; if (h->count[0] == n) return 0; int left = 1; for (len = 1; len <= MAXBITS; len++) { left <<= 1; left -= h->count[len]; if (left < 0) return left; } short offs[MAXBITS + 1]; offs[1] = 0; for (len = 1; len < MAXBITS; len++) offs[len + 1] = offs[len] + h->count[len]; for (symbol = 0; symbol < n; symbol++) if (length[symbol] != 0) h->symbol[offs[length[symbol]]++] = symbol; return left; } static int puff_codes(struct puff_state* s, const struct puff_huffman* lencode, const struct puff_huffman* distcode) { static const short lens[29] = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258}; static const short lext[29] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0}; static const short dists[30] = { 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577}; static const short dext[30] = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13}; int symbol; do { symbol = puff_decode(s, lencode); if (symbol < 0) return symbol; if (symbol < 256) { if (s->outcnt == s->outlen) return 1; if (symbol) s->out[s->outcnt] = symbol; s->outcnt++; } else if (symbol > 256) { symbol -= 257; if (symbol >= 29) return -10; int len = lens[symbol] + puff_bits(s, lext[symbol]); symbol = puff_decode(s, distcode); if (symbol < 0) return symbol; unsigned dist = dists[symbol] + puff_bits(s, dext[symbol]); if (dist > s->outcnt) return -11; if (s->outcnt + len > s->outlen) return 1; while (len--) { if (dist <= s->outcnt && s->out[s->outcnt - dist]) s->out[s->outcnt] = s->out[s->outcnt - dist]; s->outcnt++; } } } while (symbol != 256); return 0; } static int puff_fixed(struct puff_state* s) { static int virgin = 1; static short lencnt[MAXBITS + 1], lensym[FIXLCODES]; static short distcnt[MAXBITS + 1], distsym[MAXDCODES]; static struct puff_huffman lencode, distcode; if (virgin) { lencode.count = lencnt; lencode.symbol = lensym; distcode.count = distcnt; distcode.symbol = distsym; short lengths[FIXLCODES]; int symbol; for (symbol = 0; symbol < 144; symbol++) lengths[symbol] = 8; for (; symbol < 256; symbol++) lengths[symbol] = 9; for (; symbol < 280; symbol++) lengths[symbol] = 7; for (; symbol < FIXLCODES; symbol++) lengths[symbol] = 8; puff_construct(&lencode, lengths, FIXLCODES); for (symbol = 0; symbol < MAXDCODES; symbol++) lengths[symbol] = 5; puff_construct(&distcode, lengths, MAXDCODES); virgin = 0; } return puff_codes(s, &lencode, &distcode); } static int puff_dynamic(struct puff_state* s) { static const short order[19] = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}; int nlen = puff_bits(s, 5) + 257; int ndist = puff_bits(s, 5) + 1; int ncode = puff_bits(s, 4) + 4; if (nlen > MAXLCODES || ndist > MAXDCODES) return -3; short lengths[MAXCODES]; int index; for (index = 0; index < ncode; index++) lengths[order[index]] = puff_bits(s, 3); for (; index < 19; index++) lengths[order[index]] = 0; short lencnt[MAXBITS + 1], lensym[MAXLCODES]; struct puff_huffman lencode = {lencnt, lensym}; int err = puff_construct(&lencode, lengths, 19); if (err != 0) return -4; index = 0; while (index < nlen + ndist) { int symbol; int len; symbol = puff_decode(s, &lencode); if (symbol < 0) return symbol; if (symbol < 16) lengths[index++] = symbol; else { len = 0; if (symbol == 16) { if (index == 0) return -5; len = lengths[index - 1]; symbol = 3 + puff_bits(s, 2); } else if (symbol == 17) symbol = 3 + puff_bits(s, 3); else symbol = 11 + puff_bits(s, 7); if (index + symbol > nlen + ndist) return -6; while (symbol--) lengths[index++] = len; } } if (lengths[256] == 0) return -9; err = puff_construct(&lencode, lengths, nlen); if (err && (err < 0 || nlen != lencode.count[0] + lencode.count[1])) return -7; short distcnt[MAXBITS + 1], distsym[MAXDCODES]; struct puff_huffman distcode = {distcnt, distsym}; err = puff_construct(&distcode, lengths + nlen, ndist); if (err && (err < 0 || ndist != distcode.count[0] + distcode.count[1])) return -8; return puff_codes(s, &lencode, &distcode); } static int puff(unsigned char* dest, unsigned long* destlen, const unsigned char* source, unsigned long sourcelen) { struct puff_state s = { .out = dest, .outlen = *destlen, .outcnt = 0, .in = source, .inlen = sourcelen, .incnt = 0, .bitbuf = 0, .bitcnt = 0, }; int err; if (setjmp(s.env) != 0) err = 2; else { int last; do { last = puff_bits(&s, 1); int type = puff_bits(&s, 2); err = type == 0 ? puff_stored(&s) : (type == 1 ? puff_fixed(&s) : (type == 2 ? puff_dynamic(&s) : -1)); if (err != 0) break; } while (!last); } *destlen = s.outcnt; return err; } //% END CODE DERIVED FROM puff.{c,h} #define ZLIB_HEADER_WIDTH 2 static int puff_zlib_to_file(const unsigned char* source, unsigned long sourcelen, int dest_fd) { if (sourcelen < ZLIB_HEADER_WIDTH) return 0; source += ZLIB_HEADER_WIDTH; sourcelen -= ZLIB_HEADER_WIDTH; const unsigned long max_destlen = 132 << 20; void* ret = mmap(0, max_destlen, PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0); if (ret == MAP_FAILED) return -1; unsigned char* dest = (unsigned char*)ret; unsigned long destlen = max_destlen; int err = puff(dest, &destlen, source, sourcelen); if (err) { munmap(dest, max_destlen); errno = -err; return -1; } if (write(dest_fd, dest, destlen) != (ssize_t)destlen) { munmap(dest, max_destlen); return -1; } return munmap(dest, max_destlen); } static int setup_loop_device(unsigned char* data, unsigned long size, const char* loopname, int* loopfd_p) { int err = 0, loopfd = -1; int memfd = syscall(__NR_memfd_create, "syzkaller", 0); if (memfd == -1) { err = errno; goto error; } if (puff_zlib_to_file(data, size, memfd)) { err = errno; goto error_close_memfd; } loopfd = open(loopname, O_RDWR); if (loopfd == -1) { err = errno; goto error_close_memfd; } if (ioctl(loopfd, LOOP_SET_FD, memfd)) { if (errno != EBUSY) { err = errno; goto error_close_loop; } ioctl(loopfd, LOOP_CLR_FD, 0); usleep(1000); if (ioctl(loopfd, LOOP_SET_FD, memfd)) { err = errno; goto error_close_loop; } } close(memfd); *loopfd_p = loopfd; return 0; error_close_loop: close(loopfd); error_close_memfd: close(memfd); error: errno = err; return -1; } static void reset_loop_device(const char* loopname) { int loopfd = open(loopname, O_RDWR); if (loopfd == -1) { return; } if (ioctl(loopfd, LOOP_CLR_FD, 0)) { } close(loopfd); } static long syz_mount_image(volatile long fsarg, volatile long dir, volatile long flags, volatile long optsarg, volatile long change_dir, volatile unsigned long size, volatile long image) { unsigned char* data = (unsigned char*)image; int res = -1, err = 0, need_loop_device = !!size; char* mount_opts = (char*)optsarg; char* target = (char*)dir; char* fs = (char*)fsarg; char* source = NULL; char loopname[64]; if (need_loop_device) { int loopfd; memset(loopname, 0, sizeof(loopname)); snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid); if (setup_loop_device(data, size, loopname, &loopfd) == -1) return -1; close(loopfd); source = loopname; } mkdir(target, 0777); char opts[256]; memset(opts, 0, sizeof(opts)); if (strlen(mount_opts) > (sizeof(opts) - 32)) { } strncpy(opts, mount_opts, sizeof(opts) - 32); if (strcmp(fs, "iso9660") == 0) { flags |= MS_RDONLY; } else if (strncmp(fs, "ext", 3) == 0) { bool has_remount_ro = false; char* remount_ro_start = strstr(opts, "errors=remount-ro"); if (remount_ro_start != NULL) { char after = *(remount_ro_start + strlen("errors=remount-ro")); char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1); has_remount_ro = ((before == '\0' || before == ',') && (after == '\0' || after == ',')); } if (strstr(opts, "errors=panic") || !has_remount_ro) strcat(opts, ",errors=continue"); } else if (strcmp(fs, "xfs") == 0) { strcat(opts, ",nouuid"); } else if (strncmp(fs, "gfs2", 4) == 0 && (strstr(opts, "errors=panic") || strstr(opts, "debug"))) { strcat(opts, ",errors=withdraw"); } res = mount(source, target, fs, flags, opts); if (res == -1) { err = errno; goto error_clear_loop; } res = open(target, O_RDONLY | O_DIRECTORY); if (res == -1) { err = errno; goto error_clear_loop; } if (change_dir) { res = chdir(target); if (res == -1) { err = errno; } } error_clear_loop: if (need_loop_device) reset_loop_device(loopname); errno = err; return res; } #define FS_IOC_SETFLAGS _IOW('f', 2, long) static void remove_dir(const char* dir) { int iter = 0; DIR* dp = 0; const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW; retry: while (umount2(dir, umount_flags) == 0) { } dp = opendir(dir); if (dp == NULL) { if (errno == EMFILE) { exit(1); } exit(1); } struct dirent* ep = 0; while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); while (umount2(filename, umount_flags) == 0) { } struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } int i; for (i = 0;; i++) { if (unlink(filename) == 0) break; if (errno == EPERM) { int fd = open(filename, O_RDONLY); if (fd != -1) { long flags = 0; if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) { } close(fd); continue; } } if (errno == EROFS) { break; } if (errno != EBUSY || i > 100) exit(1); if (umount2(filename, umount_flags)) exit(1); } } closedir(dp); for (int i = 0;; i++) { if (rmdir(dir) == 0) break; if (i < 100) { if (errno == EPERM) { int fd = open(dir, O_RDONLY); if (fd != -1) { long flags = 0; if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) { } close(fd); continue; } } if (errno == EROFS) { break; } if (errno == EBUSY) { if (umount2(dir, umount_flags)) exit(1); continue; } if (errno == ENOTEMPTY) { if (iter < 100) { iter++; goto retry; } } } exit(1); } } static void kill_and_wait(int pid, int* status) { kill(-pid, SIGKILL); kill(pid, SIGKILL); for (int i = 0; i < 100; i++) { if (waitpid(-1, status, WNOHANG | __WALL) == pid) return; usleep(1000); } DIR* dir = opendir("/sys/fs/fuse/connections"); if (dir) { for (;;) { struct dirent* ent = readdir(dir); if (!ent) break; if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) continue; char abort[300]; snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", ent->d_name); int fd = open(abort, O_WRONLY); if (fd == -1) { continue; } if (write(fd, abort, 1) < 0) { } close(fd); } closedir(dir); } else { } while (waitpid(-1, status, __WALL) != pid) { } } static void reset_loop() { char buf[64]; snprintf(buf, sizeof(buf), "/dev/loop%llu", procid); int loopfd = open(buf, O_RDWR); if (loopfd != -1) { ioctl(loopfd, LOOP_CLR_FD, 0); close(loopfd); } } static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); write_file("/proc/self/oom_score_adj", "1000"); if (symlink("/dev/binderfs", "./binderfs")) { } } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } int i, call, thread; for (call = 0; call < 13; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); event_timedwait(&th->done, 50 + (call == 0 ? 300 : 0) + (call == 7 ? 4000 : 0)); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); reset_loop(); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); setup_test(); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { sleep_ms(10); if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[4] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: // syz_usb_control_io$hid arguments: [ // fd: fd_usb_hid (resource) // descs: nil // resps: nil // ] syz_usb_control_io(/*fd=*/-1, /*descs=*/0, /*resps=*/0); break; case 1: // socket$netlink arguments: [ // domain: const = 0x10 (8 bytes) // type: const = 0x3 (8 bytes) // proto: netlink_proto = 0x14 (4 bytes) // ] // returns sock_netlink syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=NETLINK_RDMA*/ 0x14); break; case 2: // openat arguments: [ // fd: fd_dir (resource) // file: nil // flags: open_flags = 0x2 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0ul, /*flags=O_RDWR*/ 2, /*mode=*/0); break; case 3: // socketpair$unix arguments: [ // domain: const = 0x1 (8 bytes) // type: unix_socket_type = 0x3 (8 bytes) // proto: const = 0x0 (4 bytes) // fds: nil // ] syscall(__NR_socketpair, /*domain=*/1ul, /*type=SOCK_DGRAM|SOCK_STREAM*/ 3ul, /*proto=*/0, /*fds=*/0ul); break; case 4: // syz_io_uring_setup arguments: [ // entries: int32 = 0xbd9 (4 bytes) // params: ptr[inout, io_uring_params] { // io_uring_params { // sq_entries: int32 = 0x0 (4 bytes) // cq_entries: int32 = 0xe826 (4 bytes) // flags: io_uring_setup_flags = 0x800 (4 bytes) // sq_thread_cpu: int32 = 0x1 (4 bytes) // sq_thread_idle: int32 = 0x3c3 (4 bytes) // features: int32 = 0x0 (4 bytes) // wq_fd: fd_io_uring (resource) // resv: buffer: {00 00 00 00 00 00 00 00 00 00 00 00} (length 0xc) // sq_off: array[int32] { // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // } // cq_off: array[int32] { // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // int32 = 0x0 (4 bytes) // } // } // } // ring_ptr: ptr[out, ring_ptr] { // ring_ptr (resource) // } // sqes_ptr: ptr[out, sqes_ptr] { // sqes_ptr (resource) // } // ] // returns fd_io_uring *(uint32_t*)0x200000000644 = 0xe826; *(uint32_t*)0x200000000648 = 0x800; *(uint32_t*)0x20000000064c = 1; *(uint32_t*)0x200000000650 = 0x3c3; *(uint32_t*)0x200000000658 = -1; memset((void*)0x20000000065c, 0, 12); res = -1; res = syz_io_uring_setup(/*entries=*/0xbd9, /*params=*/0x200000000640, /*ring_ptr=*/0x200000000dc0, /*sqes_ptr=*/0x200000000000); if (res != -1) { r[0] = res; r[1] = *(uint64_t*)0x200000000dc0; } break; case 5: // syz_memcpy_off$IO_URING_METADATA_GENERIC arguments: [ // ring_ptr: ring_ptr (resource) // off: io_uring_offsets = 0x4 (8 bytes) // src: ptr[in, int32] { // int32 = 0xfffffffc (4 bytes) // } // src_off: const = 0x0 (8 bytes) // nbytes: const = 0x4 (8 bytes) // ] *(uint32_t*)0x200000000180 = 0xfffffffc; syz_memcpy_off(/*ring_ptr=*/r[1], /*off=*/4, /*src=*/0x200000000180, /*src_off=*/0, /*nbytes=*/4); break; case 6: // io_uring_enter arguments: [ // fd: fd_io_uring (resource) // to_submit: int32 = 0x847ba (4 bytes) // min_complete: int32 = 0x0 (4 bytes) // flags: io_uring_enter_flags = 0xe (8 bytes) // sigmask: nil // size: len = 0x0 (8 bytes) // ] syscall( __NR_io_uring_enter, /*fd=*/r[0], /*to_submit=*/0x847ba, /*min_complete=*/0, /*flags=IORING_ENTER_EXT_ARG|IORING_ENTER_SQ_WAIT|IORING_ENTER_SQ_WAKEUP*/ 0xeul, /*sigmask=*/0ul, /*size=*/0ul); break; case 7: // syz_mount_image$bfs arguments: [ // fs: ptr[in, buffer] { // buffer: {62 66 73 00} (length 0x4) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // flags: mount_flags = 0x10812 (8 bytes) // opts: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // union ANYUNION { // ANYBLOB: buffer: {00 7d 8e 93 01 ef b9 bb cb f6 68 e1 5c ff c9 // 8b 11 19 6d 29 70 6d 76 a0 a1 4c b1 22 78 97 d8 a3 b5 f2 04 0e // b6 b8 33 70 70 06 b5 ef d9 5e fe 8a 85 46 d5 71 0f 86 32 96 22 // 8f 75 5e f6 eb 46 0a fd 46 6e 8a 0b 77 cc 7e 6a 78 65 7f 97 bd // 04 0b 3a a8 d8 3f 45 ea 6a d1 06 fa c0 07 dd fc d0 f6 18 03 1c // 14 ad 92 ea 68 86 19 94 11 36 7e 37 07 6c 87 9f 10 bd 84 3d 62 // 79 62 04 ec 8f b4 27 51 51 f0 fe dd d3 00 00 00 00 00 00 00 00 // 94 fd 79 6a 78 31 23 bc 99 ea 63 a7 43 53 d0 cd c3 72 09 f5 ec // 03 4f bb 09 13 6b 08 8a ab c2 3b 67 9a ef 38 8f ce ac 10 4f 65 // ae 36 b7 8d 67 a6 b4 fd 63 f7 5f d4 9c a9 58 b4 be 97 2f 27 1c // bf df f0 bf 06 e6 df c9 c6 67 bf 1e e2 80 25 5b f5 97 25 61 96 // b6 71 f2 a1 11 c3 c3 07 9a 91 31 b5 60 41 95 e1 02 fa cf a2 0c // 83 2e e2 db cf 0e 70 a7 ff 0d d6 69 5a fd 89 03 1b 79 b9 e9 6f // 3e b1 18 40 8d 14 f2 8a f5 b6 26 3f 62 84 e7 d5 4a 39 0d d8 1d // 0b 25 4b 88 0a 78 da b4 36 bf c1 2b 31 16 89 30 8c c7 89 92 86 // b8 5d 05 00 96 9d df c4 b5 39 7c 8e 53 59 9e 2c b3 6c da 9d f1 // 9f 84 74 d1 10 29 dc 58 37 17 1a 4a 63 2f 39 2c 64 8a 14 52 1b // 37 54 99 2a 88 ad 2f 88 8a 5d 2b 0a d2 20 9f a0 5c 66 79 e3 d8 // 2b 40 22 58 e8 df 1d 7f 1b b7 7c 48 11 e9 3b 2d 27 e3 bf 50 05 // 5a 43 f3 d7 10 db ca 3d 61 6d 09 a8 5e 87 00 00 00 00 00 00 00 // 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 // 00 00 b7 1b 72 24 eb b8 51 60 c7 3f 13 dc c0 af ef 33 df 7d 52 // 85 8a 5b db 1c 5a 19 40 3e 97 2d a7 59 84 80 21 04 00 00 00 00 // 00 00 00} (length 0x1e0) // } // } // } // chdir: int8 = 0x1 (1 bytes) // size: len = 0xa4 (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0xa4) // } // ] // returns fd_dir memcpy((void*)0x200000002040, "bfs\000", 4); memcpy((void*)0x200000000100, "./file0\000", 8); memcpy( (void*)0x20000001f380, "\x00\x7d\x8e\x93\x01\xef\xb9\xbb\xcb\xf6\x68\xe1\x5c\xff\xc9\x8b\x11" "\x19\x6d\x29\x70\x6d\x76\xa0\xa1\x4c\xb1\x22\x78\x97\xd8\xa3\xb5\xf2" "\x04\x0e\xb6\xb8\x33\x70\x70\x06\xb5\xef\xd9\x5e\xfe\x8a\x85\x46\xd5" "\x71\x0f\x86\x32\x96\x22\x8f\x75\x5e\xf6\xeb\x46\x0a\xfd\x46\x6e\x8a" "\x0b\x77\xcc\x7e\x6a\x78\x65\x7f\x97\xbd\x04\x0b\x3a\xa8\xd8\x3f\x45" "\xea\x6a\xd1\x06\xfa\xc0\x07\xdd\xfc\xd0\xf6\x18\x03\x1c\x14\xad\x92" "\xea\x68\x86\x19\x94\x11\x36\x7e\x37\x07\x6c\x87\x9f\x10\xbd\x84\x3d" "\x62\x79\x62\x04\xec\x8f\xb4\x27\x51\x51\xf0\xfe\xdd\xd3\x00\x00\x00" "\x00\x00\x00\x00\x00\x94\xfd\x79\x6a\x78\x31\x23\xbc\x99\xea\x63\xa7" "\x43\x53\xd0\xcd\xc3\x72\x09\xf5\xec\x03\x4f\xbb\x09\x13\x6b\x08\x8a" "\xab\xc2\x3b\x67\x9a\xef\x38\x8f\xce\xac\x10\x4f\x65\xae\x36\xb7\x8d" "\x67\xa6\xb4\xfd\x63\xf7\x5f\xd4\x9c\xa9\x58\xb4\xbe\x97\x2f\x27\x1c" "\xbf\xdf\xf0\xbf\x06\xe6\xdf\xc9\xc6\x67\xbf\x1e\xe2\x80\x25\x5b\xf5" "\x97\x25\x61\x96\xb6\x71\xf2\xa1\x11\xc3\xc3\x07\x9a\x91\x31\xb5\x60" "\x41\x95\xe1\x02\xfa\xcf\xa2\x0c\x83\x2e\xe2\xdb\xcf\x0e\x70\xa7\xff" "\x0d\xd6\x69\x5a\xfd\x89\x03\x1b\x79\xb9\xe9\x6f\x3e\xb1\x18\x40\x8d" "\x14\xf2\x8a\xf5\xb6\x26\x3f\x62\x84\xe7\xd5\x4a\x39\x0d\xd8\x1d\x0b" "\x25\x4b\x88\x0a\x78\xda\xb4\x36\xbf\xc1\x2b\x31\x16\x89\x30\x8c\xc7" "\x89\x92\x86\xb8\x5d\x05\x00\x96\x9d\xdf\xc4\xb5\x39\x7c\x8e\x53\x59" "\x9e\x2c\xb3\x6c\xda\x9d\xf1\x9f\x84\x74\xd1\x10\x29\xdc\x58\x37\x17" "\x1a\x4a\x63\x2f\x39\x2c\x64\x8a\x14\x52\x1b\x37\x54\x99\x2a\x88\xad" "\x2f\x88\x8a\x5d\x2b\x0a\xd2\x20\x9f\xa0\x5c\x66\x79\xe3\xd8\x2b\x40" "\x22\x58\xe8\xdf\x1d\x7f\x1b\xb7\x7c\x48\x11\xe9\x3b\x2d\x27\xe3\xbf" "\x50\x05\x5a\x43\xf3\xd7\x10\xdb\xca\x3d\x61\x6d\x09\xa8\x5e\x87\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xb7\x1b\x72\x24\xeb" "\xb8\x51\x60\xc7\x3f\x13\xdc\xc0\xaf\xef\x33\xdf\x7d\x52\x85\x8a\x5b" "\xdb\x1c\x5a\x19\x40\x3e\x97\x2d\xa7\x59\x84\x80\x21\x04\x00\x00\x00" "\x00\x00\x00\x00", 480); memcpy( (void*)0x20000001f580, "\x78\x9c\xec\xd1\x31\x6a\x02\x41\x18\x05\xe0\x97\x2d\x92\xad\x96\xf4" "\x29\x72\x83\xdc\x21\x47\x09\x29\xb5\xb3\x52\x04\x0f\xe0\x59\xbc\x8a" "\x47\xf0\x06\x16\xb6\x36\x23\xeb\xaa\x88\x0b\x0b\x56\xa2\x7c\x1f\xcc" "\x0c\xef\x0d\x03\x03\xff\x7a\xbf\xfa\x4a\x93\x94\x45\x52\x4a\x5d\xae" "\x4d\xa6\xb3\xd1\xdf\xb8\xdb\xd3\x53\xf7\x2b\x9e\x4e\x95\xf7\xe3\xd9" "\x4e\xf3\xbb\x69\x73\xb2\xfd\x4d\x3e\x92\xbc\xa5\xcb\x9b\xdd\xfc\xff" "\xbc\x72\xea\x5b\xcb\x47\x7e\x1c\x00\x00\xb8\x5b\x95\x9f\xdb\x7c\x29" "\x3e\x07\x5f\x0e\xdf\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xbc" "\x8a\x43\x00\x00\x00\xff\xff\x6a\x63\x23\x15", 164); syz_mount_image( /*fs=*/0x200000002040, /*dir=*/0x200000000100, /*flags=MS_POSIXACL|MS_SYNCHRONOUS|MS_NOSUID|MS_NODIRATIME*/ 0x10812, /*opts=*/0x20000001f380, /*chdir=*/1, /*size=*/0xa4, /*img=*/0x20000001f580); break; case 8: // openat$cgroup_ro arguments: [ // fd: fd_cgroup (resource) // file: ptr[in, buffer] { // buffer: {63 70 75 2e 73 74 61 74 00} (length 0x9) // } // flags: const = 0x275a (4 bytes) // mode: const = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x200000000080, "cpu.stat\000", 9); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000080ul, /*flags=*/0x275a, /*mode=*/0); if (res != -1) r[2] = res; break; case 9: // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8) // } // flags: open_flags = 0x20441 (4 bytes) // mode: open_mode = 0x189 (2 bytes) // ] // returns fd memcpy((void*)0x2000000000c0, "./file1\000", 8); syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x2000000000c0ul, /*flags=O_NOFOLLOW|O_CREAT|O_APPEND|O_WRONLY*/ 0x20441, /*mode=S_IXOTH|S_IXGRP|S_IWUSR|S_IRUSR*/ 0x189); break; case 10: // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8) // } // flags: open_flags = 0x1 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x200000000040, "./file1\000", 8); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000040ul, /*flags=O_WRONLY*/ 1, /*mode=*/0); if (res != -1) r[3] = res; break; case 11: // pwrite64 arguments: [ // fd: fd (resource) // buf: ptr[in, buffer] { // buffer: {32} (length 0x1) // } // count: len = 0xfdef (8 bytes) // pos: intptr = 0xe7c (8 bytes) // ] memset((void*)0x200000000140, 50, 1); syscall(__NR_pwrite64, /*fd=*/r[3], /*buf=*/0x200000000140ul, /*count=*/0xfdeful, /*pos=*/0xe7cul); break; case 12: // write$UHID_CREATE2 arguments: [ // fd: fd_uhid (resource) // data: nil // len: len = 0x118 (8 bytes) // ] syscall(__NR_write, /*fd=*/r[2], /*data=*/0ul, /*len=*/0x118ul); break; } } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); const char* reason; (void)reason; for (procid = 0; procid < 5; procid++) { if (fork() == 0) { use_temporary_dir(); loop(); } } sleep(1000000); return 0; }