// https://syzkaller.appspot.com/bug?id=b1bc8c60f5a4786ec936181437385c70c7b339e2 // 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 #ifndef __NR_io_uring_enter #define __NR_io_uring_enter 426 #endif #ifndef __NR_io_uring_register #define __NR_io_uring_register 427 #endif #ifndef __NR_io_uring_setup #define __NR_io_uring_setup 425 #endif #ifndef __NR_memfd_create #define __NR_memfd_create 279 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif #ifndef __NR_openat #define __NR_openat 56 #endif #ifndef __NR_setsockopt #define __NR_setsockopt 208 #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 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_io_uring_submit(volatile long a0, volatile long a1, volatile long a2) { char* ring_ptr = (char*)a0; char* sqes_ptr = (char*)a1; char* sqe = (char*)a2; 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; char* sqe_dest = sqes_ptr + sq_tail * SIZEOF_IO_URING_SQE; memcpy(sqe_dest, sqe, SIZEOF_IO_URING_SQE); uint32_t sq_tail_next = *sq_tail_ptr + 1; __atomic_store_n(sq_tail_ptr, sq_tail_next, __ATOMIC_RELEASE); 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")) { } } 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[3] = {0xffffffffffffffff, 0x0, 0x0}; void execute_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } // syz_mount_image$minix arguments: [ // fs: ptr[in, buffer] { // buffer: {6d 69 6e 69 78 00} (length 0x6) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8) // } // flags: mount_flags = 0x2 (8 bytes) // opts: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // } // } // chdir: int8 = 0xd (1 bytes) // size: len = 0x192 (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x192) // } // ] // returns fd_dir memcpy((void*)0x200000c0, "minix\000", 6); memcpy((void*)0x20000100, "./file1\000", 8); memcpy( (void*)0x20000700, "\x78\x9c\xec\xdb\xcd\x4e\x1a\x51\x14\xc0\xf1\x33\x0c\x65\x80\x7e\xd1\xd2" "\x76\xd1\x34\x69\x93\x2e\xda\x8d\x0c\xa0\x92\xb8\xd3\x47\x41\x18\x09\x71" "\x50\x23\x6e\x20\x2e\xd0\x17\xf0\x19\x7c\x3f\x59\x18\x37\xae\xc4\xcc\x95" "\x19\xe2\xc0\x40\x20\xc2\x1d\xc2\xff\xb7\x80\xcb\x3d\xf7\xe3\x5c\xc2\x85" "\xb3\x41\x00\x6c\xac\x7d\xf9\x23\x86\x18\x92\xf0\x5e\xfc\x4a\xe7\x6e\xf2" "\x86\xee\x94\x00\xac\xc8\x60\xf8\xfc\x34\x00\xb0\x79\xcc\x47\xdd\x19\x00" "\xd0\xa3\x7f\x20\xaa\xf6\xbf\xbb\xbf\xac\x89\x99\x0a\xea\x02\xbf\xe5\xc5" "\x7b\x7e\x3c\x61\x8d\xd5\x0f\xfd\x2b\x91\x9f\xc9\x61\xdc\x48\x4b\x26\x5c" "\x5f\xdc\x8a\xfc\xf3\xe7\x1b\xd9\xf0\xf4\x07\xaf\x27\x1b\xc4\xdf\x87\xc2" "\x29\xb5\xfe\xff\xbf\xfe\xfe\x1f\xe4\xa3\x7c\x92\xcf\x92\x93\x2f\xf2\x55" "\xf2\xc3\xfd\xeb\xc1\xfc\x1f\xf3\x96\x3f\xe3\x07\x02\x00\x60\x03\x18\x52" "\x98\x15\x8f\x18\xf0\x4e\x3d\x66\xe4\xa8\xe9\x3a\x45\x35\x32\xe4\x70\x47" "\x8d\xf2\xe2\xa5\xc8\xf5\x53\x2a\x5e\x9e\x1a\x37\x7f\x47\xe7\x67\xa9\xf9" "\x85\xda\xa9\x5b\x9f\x7a\x0e\x00\xe3\x12\x0b\xdf\xff\x17\x66\x70\xff\x27" "\x4b\xce\xb8\xff\x00\xf4\x69\x77\xba\xc7\x55\xd7\x75\xce\x63\xd0\x48\xbf" "\xce\x67\x60\x89\x2c\x71\x53\x2b\x0e\x47\x5e\xdf\x86\x25\xe1\x9e\xe4\x9b" "\xac\x9c\x89\x0c\x5d\xcb\xa4\x90\xf7\xa1\xd1\xff\x6e\xcc\xdb\xe8\x85\x7b" "\xbc\x6a\x3a\x06\x89\x99\xa3\x34\x74\x7f\x33\x01\x58\x36\xfb\xa2\x75\x66" "\xb7\x3b\xdd\xad\x66\xab\xda\x70\x1a\xce\x49\xb9\x58\xdc\xab\xec\x6e\x97" "\x2a\x65\x5b\x55\xf6\xf6\xf4\xfa\x1e\xc0\xfa\x1a\xfd\xfa\xeb\xce\x04\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x2c\xea\x9b\x7c\xd7\x9d\x02\x00" "\x00\x00\x80\x15\x59\xc5\xff\x8a\x74\x9f\x11\x00\x80\xd8\x79\x0e\x00\x00" "\xff\xff\x2b\xf0\x17\x0f", 402); syz_mount_image(/*fs=*/0x200000c0, /*dir=*/0x20000100, /*flags=MS_NOSUID*/ 2, /*opts=*/0x20000540, /*chdir=*/0xd, /*size=*/0x192, /*img=*/0x20000700); // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 62 75 73 00} (length 0x6) // } // flags: open_flags = 0x42 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x20000040, "./bus\000", 6); syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000040ul, /*flags=O_CREAT|O_RDWR*/ 0x42, /*mode=*/0); // openat$cgroup_ro arguments: [ // fd: fd_cgroup (resource) // file: ptr[in, buffer] { // buffer: {6d 65 6d 6f 72 79 2e 73 77 61 70 2e 63 75 72 72 65 6e 74 00} // (length 0x14) // } // flags: const = 0x275a (4 bytes) // mode: const = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x20000000, "memory.swap.current\000", 20); syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000000ul, /*flags=*/0x275a, /*mode=*/0); // syz_io_uring_setup arguments: [ // entries: int32 = 0x124a (4 bytes) // params: ptr[inout, io_uring_params] { // io_uring_params { // sq_entries: int32 = 0x0 (4 bytes) // cq_entries: int32 = 0x2170 (4 bytes) // flags: io_uring_setup_flags = 0x1 (4 bytes) // sq_thread_cpu: int32 = 0x3 (4 bytes) // sq_thread_idle: int32 = 0x4000000 (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*)0x200000c4 = 0x2170; *(uint32_t*)0x200000c8 = 1; *(uint32_t*)0x200000cc = 3; *(uint32_t*)0x200000d0 = 0x4000000; *(uint32_t*)0x200000d8 = -1; memset((void*)0x200000dc, 0, 12); res = -1; res = syz_io_uring_setup(/*entries=*/0x124a, /*params=*/0x200000c0, /*ring_ptr=*/0x20000180, /*sqes_ptr=*/0x20000280); if (res != -1) { r[0] = res; r[1] = *(uint64_t*)0x20000180; r[2] = *(uint64_t*)0x20000280; } // io_uring_register$IORING_REGISTER_FILES arguments: [ // fd: fd_io_uring (resource) // opcode: const = 0x2 (8 bytes) // arg: ptr[in, array[fd]] { // array[fd] { // fd (resource) // } // } // nr_args: len = 0x1 (8 bytes) // ] *(uint32_t*)0x20000300 = -1; syscall(__NR_io_uring_register, /*fd=*/r[0], /*opcode=*/2ul, /*arg=*/0x20000300ul, /*nr_args=*/1ul); // syz_io_uring_submit arguments: [ // ring_ptr: ring_ptr (resource) // sqes_ptr: sqes_ptr (resource) // sqe: ptr[in, io_uring_sqe_u] { // union io_uring_sqe_u { // IORING_OP_FILES_UPDATE: io_uring_sqe[IORING_OP_FILES_UPDATE, // const[0, int16], const[0, int32], fileoff[int64], ptr[in, // array[fd]], len[addr, int32], const[0, int32], // sqe_user_data_not_openat, personality_only_misc] { // opcode: const = 0x14 (1 bytes) // flags: iosqe_flags = 0x0 (1 bytes) // ioprio: const = 0x0 (2 bytes) // fd: const = 0x0 (4 bytes) // off: int64 = 0xffffffffffffffff (8 bytes) // addr: ptr[in, array[fd]] { // array[fd] { // fd (resource) // } // } // len: len = 0x1 (4 bytes) // misc_flags: const = 0x0 (4 bytes) // user_data: sqe_user_data_not_openat = 0x0 (8 bytes) // misc: personality_only_misc { // buf_index_unused: const = 0x0 (2 bytes) // ioring_personality_id: ioring_personality_id (resource) // pad_unused: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 // 00 00 00 00 00 00} (length 0x14) // } // } // } // } // ] *(uint8_t*)0x200002c0 = 0x14; *(uint8_t*)0x200002c1 = 0; *(uint16_t*)0x200002c2 = 0; *(uint32_t*)0x200002c4 = 0; *(uint64_t*)0x200002c8 = -1; *(uint64_t*)0x200002d0 = 0x20000000; *(uint32_t*)0x20000000 = -1; *(uint32_t*)0x200002d8 = 1; *(uint32_t*)0x200002dc = 0; *(uint64_t*)0x200002e0 = 0; *(uint16_t*)0x200002e8 = 0; *(uint16_t*)0x200002ea = 0; memset((void*)0x200002ec, 0, 20); syz_io_uring_submit(/*ring_ptr=*/r[1], /*sqes_ptr=*/r[2], /*sqe=*/0x200002c0); // setsockopt$IP_VS_SO_SET_TIMEOUT arguments: [ // fd: sock_in (resource) // level: const = 0x0 (4 bytes) // opt: const = 0x48a (4 bytes) // val: ptr[in, ip_vs_timeout_user] { // ip_vs_timeout_user { // tcp_timeout: int32 = 0x3 (4 bytes) // tcp_fin_timeout: int32 = 0x0 (4 bytes) // udp_timeout: int32 = 0x47e87020 (4 bytes) // } // } // len: len = 0xc (8 bytes) // ] *(uint32_t*)0x20000000 = 3; *(uint32_t*)0x20000004 = 0; *(uint32_t*)0x20000008 = 0x47e87020; syscall(__NR_setsockopt, /*fd=*/(intptr_t)-1, /*level=*/0, /*opt=*/0x48a, /*val=*/0x20000000ul, /*len=*/0xcul); // io_uring_enter arguments: [ // fd: fd_io_uring (resource) // to_submit: int32 = 0x47f6 (4 bytes) // min_complete: int32 = 0x0 (4 bytes) // flags: io_uring_enter_flags = 0x0 (8 bytes) // sigmask: nil // size: len = 0x0 (8 bytes) // ] syscall(__NR_io_uring_enter, /*fd=*/r[0], /*to_submit=*/0x47f6, /*min_complete=*/0, /*flags=*/0ul, /*sigmask=*/0ul, /*size=*/0ul); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*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=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); const char* reason; (void)reason; use_temporary_dir(); loop(); return 0; }