// https://syzkaller.appspot.com/bug?id=98834257f11e91cb3bb8c0e74f8888b9d69ede1a // 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 #ifndef __NR_bpf #define __NR_bpf 321 #endif #ifndef __NR_memfd_create #define __NR_memfd_create 319 #endif static unsigned long long procid; static __thread int clone_ongoing; static __thread int skip_segv; static __thread jmp_buf segv_env; static void segv_handler(int sig, siginfo_t* info, void* ctx) { if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) { exit(sig); } uintptr_t addr = (uintptr_t)info->si_addr; const uintptr_t prog_start = 1 << 20; const uintptr_t prog_end = 100 << 20; int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0; int valid = addr < prog_start || addr > prog_end; if (skip && valid) { _longjmp(segv_env, 1); } exit(sig); } static void install_segv_handler(void) { struct sigaction sa; memset(&sa, 0, sizeof(sa)); sa.sa_handler = SIG_IGN; syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8); syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8); memset(&sa, 0, sizeof(sa)); sa.sa_sigaction = segv_handler; sa.sa_flags = SA_NODEFER | SA_SIGINFO; sigaction(SIGSEGV, &sa, NULL); sigaction(SIGBUS, &sa, NULL); } #define NONFAILING(...) \ ({ \ int ok = 1; \ __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ if (_setjmp(segv_env) == 0) { \ __VA_ARGS__; \ } else \ ok = 0; \ __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ ok; \ }) 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 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; } //% 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; } 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"); } static void setup_sysctl() { int cad_pid = fork(); if (cad_pid < 0) exit(1); if (cad_pid == 0) { for (;;) sleep(100); } char tmppid[32]; snprintf(tmppid, sizeof(tmppid), "%d", cad_pid); struct { const char* name; const char* data; } files[] = { {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"}, {"/proc/sys/kernel/hung_task_check_interval_secs", "20"}, {"/proc/sys/net/core/bpf_jit_kallsyms", "1"}, {"/proc/sys/net/core/bpf_jit_harden", "0"}, {"/proc/sys/kernel/kptr_restrict", "0"}, {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"}, {"/proc/sys/fs/mount-max", "100"}, {"/proc/sys/vm/oom_dump_tasks", "0"}, {"/proc/sys/debug/exception-trace", "0"}, {"/proc/sys/kernel/printk", "7 4 1 3"}, {"/proc/sys/kernel/keys/gc_delay", "1"}, {"/proc/sys/vm/oom_kill_allocating_task", "1"}, {"/sys/kernel/debug/failslab/task-filter", "Y"}, {"/sys/kernel/debug/fail_page_alloc/task-filter", "Y"}, {"/sys/kernel/debug/fail_futex/task-filter", "Y"}, {"/sys/kernel/debug/fail_usercopy/task-filter", "Y"}, {"/sys/kernel/debug/fail_make_request/task-filter", "Y"}, {"/sys/kernel/debug/fail_io_timeout/task-filter", "Y"}, {"/sys/kernel/debug/fail_iommufd/task-filter", "Y"}, {"/proc/sys/kernel/ctrl-alt-del", "0"}, {"/proc/sys/kernel/cad_pid", tmppid}, }; for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) { if (!write_file(files[i].name, files[i].data)) { } } kill(cad_pid, SIGKILL); while (waitpid(cad_pid, NULL, 0) != cad_pid) ; } 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 < 9; 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 ? 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++) { reset_loop(); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { 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; } } } uint64_t r[1] = {0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: // syz_mount_image$iso9660 arguments: [ // fs: ptr[in, buffer] { // buffer: {69 73 6f 39 36 36 30 00} (length 0x8) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // flags: mount_flags = 0x200000 (8 bytes) // opts: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // union ANYUNION { // ANYBLOB: buffer: {00} (length 0x1) // } // } // } // chdir: int8 = 0x0 (1 bytes) // size: len = 0x3fc (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x3fc) // } // ] // returns fd_dir NONFAILING(memcpy((void*)0x200000000080, "iso9660\000", 8)); NONFAILING(memcpy((void*)0x200000000000, "./file0\000", 8)); NONFAILING(memset((void*)0x200000000040, 0, 1)); NONFAILING(memcpy( (void*)0x200000000280, "\x78\x9c\xec\xdc\xcf\x4e\x1b\x47\x1c\xc0\xf1\x59\x62\x28\xa5\x52\x54" "\x29\x6a\x02\x84\xc3\xa4\x69\x25\x7a\x88\xb3\xbb\x14\x23\x94\xd3\x76" "\x3d\x36\x93\xac\x77\x57\x33\xeb\x08\x4e\x55\x54\x20\x42\x05\x52\x95" "\x54\x2a\x5c\x5a\x2e\x69\x2b\xb5\x0f\x91\x6b\xdf\xa0\x97\x3e\x51\xa3" "\xf6\x0d\xa8\x76\xd7\x50\xc0\x36\xae\xc2\x1f\xa3\xe8\xfb\x91\xd0\x8c" "\x3d\xbf\x9d\xf9\xcd\xca\x9a\x91\x8d\x66\x05\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x10\x4e\x58\x77\x5d\xcf\x11\x91\x8e\xdb" "\xcb\xb2\xbf\xb0\x6e\x92\x56\xaf\x86\x4f\xb7\x8b\xe2\xb0\xbf\x8f\x4f" "\x14\x67\x8c\x2b\x84\x93\xff\x89\xf1\x71\x31\x59\xbe\x35\x79\xeb\xbf" "\xe6\x8f\xca\x4e\xee\x94\xaf\xee\x88\xf1\xbc\x18\x17\x7b\x1f\xdc\xfe" "\xf0\xd1\xad\xca\xc8\xe1\xf5\x67\x24\x7c\x25\x76\x76\xf7\x5e\xfc\x51" "\xe6\xf8\xbf\xe2\x2b\xff\x1c\x14\x2e\x3d\xb1\x2b\xd2\x54\xb1\xb6\x89" "\x6e\x05\x4d\x25\xb5\x4d\xe4\x62\xad\xe6\x3e\x5c\x6a\x58\xd9\xd0\x91" "\xb2\x2b\x36\x53\x2d\x19\x1a\x15\x64\x89\x91\xb3\xe1\x67\xd2\x5b\x5c" "\x9c\x93\xaa\xba\x92\xb4\xe3\x66\x3d\x88\xd4\xe1\x9b\x0b\x0f\x7c\xd7" "\xad\xc9\xc7\xd5\x54\x05\xc6\x26\xf1\xc3\xc7\x55\x1b\x2e\xe9\x28\xd2" "\x71\xb3\x88\xc9\x9b\xf3\x98\x85\xfc\x83\xf8\x44\x67\x32\x53\x41\x4b" "\xca\xf5\x8d\xcd\xb5\xb9\x41\x49\xe6\x41\xde\x19\xed\x8e\x10\x3f\x16" "\x41\xfe\xa0\x9e\x7c\xd7\xf7\x3d\xcf\xf7\xbd\xda\xfc\xe2\xfc\x82\xeb" "\x56\x7c\xd7\x97\x27\xde\x70\x4f\x11\x5d\x97\x0c\xff\x43\x8b\xe1\xba" "\xc8\xe5\x1b\x38\x97\x83\xce\xfe\x0f\x00\x00\x00\x00\x00\xde\x5d\x4e" "\xf1\x1b\x7b\xfe\xfd\x7f\xb4\xf8\x1d\xde\x11\x0d\x1d\x29\x77\xd8\x69" "\x01\x00\x00\x00\x00\x80\x0b\x54\xfc\xe7\xff\x4e\x5e\x8c\xe6\xb5\x49" "\xe1\xf0\xfd\x1f\x00\x00\x00\x00\x80\x77\xcd\xcf\xc7\xcf\xd8\xbd\xdf" "\xeb\x8c\x9d\x4d\xdf\x73\xfe\xfc\x5b\x18\x33\xea\xec\xa7\xcb\x9f\x38" "\x5b\x41\x1e\x1e\x6c\x89\x4a\x71\xdd\x8d\xd3\x3d\x66\x8d\x69\xe7\x66" "\xa7\x93\xa2\xa8\x55\x3a\xaf\x42\x35\xe3\x4c\x95\x41\x53\x87\xd1\x6f" "\x3a\xc5\xfa\xa0\xb3\x7e\x4e\x57\x02\x9d\x91\x4f\x27\x50\x9e\xb0\x3b" "\xf8\xa1\x47\x02\xe2\x57\x31\x5d\x06\x4d\xaf\x96\xe5\xea\x61\x4b\x39" "\xca\x44\x43\x47\xaa\x1a\x26\xd1\x23\x4f\x04\xc1\xcd\x91\x4c\x2d\x67" "\xdf\x6d\x6f\x7c\x2f\x8a\xe9\xff\x12\xb7\x6e\x3a\x62\x7d\x63\x73\xad" "\xfa\xd5\x8b\xcd\xd5\x22\x97\xfd\xbc\x97\xfd\xad\xce\x01\x8a\xae\x73" "\x14\xfd\x6f\x86\x78\x79\x74\xee\xb1\xf7\x8c\xc7\x3a\x5d\x14\xe3\x4e" "\x94\xe3\xba\xc7\xe7\x3f\x52\xb6\x8f\x74\x8f\x39\x25\xfa\x8c\xf9\x4a" "\xdc\x2d\x63\xee\x4e\x94\xe5\xc4\xc9\xf9\x8f\xe7\xf3\xf7\xaa\xfd\x66" "\xdf\xc9\xc2\x3b\xe7\xcc\x5f\x89\x99\x32\x66\x66\xf6\x7e\x5e\xdc\x9f" "\xed\x91\x85\x3f\x28\x0b\xff\x78\x16\xfd\xef\xc5\xf9\xb2\x98\xeb\x9d" "\xc5\x5f\x47\x59\xcc\x9d\x33\x0b\x00\x18\x96\xf5\x01\xbb\x90\xd3\xbd" "\xf1\xbf\xc5\x2a\x77\x71\xbb\xfb\xd9\x2b\xfa\xbd\x32\xe6\xde\x74\xb1" "\xb0\x56\xa6\x7b\xac\xe8\xee\xa0\x7d\xc5\x3d\xe7\xee\xf6\x7b\xd7\x33" "\x10\xfa\xed\xb1\xf9\xb8\xbf\xc5\xad\xea\x98\x10\x47\xbb\xea\xeb\xfc" "\x82\xd7\x7d\xc7\xb5\x91\xef\xe4\xb7\xf0\xc6\xcb\xad\x6f\xc4\xed\x9d" "\xdd\xbd\x07\x1b\x5b\xcf\x9e\xaf\x3d\x5f\xdb\xf6\xfd\xb9\x9a\xfb\xb9" "\xeb\xce\xfb\x62\xb4\x98\x46\xa7\x60\xef\x01\x00\xf4\xa0\xcc\x1b\x67" "\x22\xfb\xc9\x31\x46\xa7\x5f\x7a\x63\x8b\x5e\x90\x2d\x29\x69\x92\xf0" "\x89\x34\xba\xde\x54\x52\xc7\x99\x32\xe1\x52\x10\x37\x95\x4c\x4d\x92" "\x25\x61\x12\xe5\x95\xa7\xba\xae\xac\xb4\xed\x34\x4d\x4c\x26\x1b\x89" "\x91\x69\x62\xf5\x72\xf1\xe4\x17\xd9\x79\xf4\x8b\x55\xad\x20\xce\x74" "\x68\xd3\x48\x05\x56\xc9\x30\x89\xb3\x20\xcc\x64\x5d\xdb\x50\xa6\xed" "\x2f\x22\x6d\x97\x94\x29\x2e\xb6\xa9\x0a\x75\x43\x87\x41\xa6\x93\x58" "\xda\xa4\x6d\x42\x55\x95\xd2\x2a\x75\x2c\x50\xd7\x55\x9c\xe9\x86\xce" "\xab\xb1\x4c\x8d\x6e\x05\x66\x45\x3e\x4d\xa2\x76\x4b\xc9\xba\xb2\xa1" "\xd1\x69\x96\xe4\xd3\x32\x47\x63\xe9\xb8\x91\x98\x56\xd1\x6d\x75\xd8" "\x37\x1b\x00\x80\x6b\x62\x67\x77\xef\xeb\x67\x9b\x9b\x6b\xdf\x5e\x62" "\x65\xd8\x73\x04\x00\x00\x27\xb1\x4b\x03\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x70\xfd\x5d\xc5\xf9\xbf\x8b\xad" "\x38\x42\x88\x6b\x90\x06\x15\x2a\x17\x5d\x19\x7b\xdb\x0f\xf6\xc1\x25" "\xe4\x33\xec\x95\x09\xc0\x65\xfb\x37\x00\x00\xff\xff\xbe\x02\xa9\x79", 1020)); NONFAILING(syz_mount_image(/*fs=*/0x200000000080, /*dir=*/0x200000000000, /*flags=MS_RELATIME*/ 0x200000, /*opts=*/0x200000000040, /*chdir=*/0, /*size=*/0x3fc, /*img=*/0x200000000280)); break; case 1: // syz_mount_image$fuse arguments: [ // fs: nil // dir: ptr[in, buffer] { // buffer: {2e 2f 62 75 73 00} (length 0x6) // } // flags: mount_flags = 0x3000009 (8 bytes) // opts: nil // chdir: int8 = 0x0 (1 bytes) // size: const = 0x0 (8 bytes) // img: nil // ] // returns fd_dir NONFAILING(memcpy((void*)0x2000000000c0, "./bus\000", 6)); NONFAILING(syz_mount_image( /*fs=*/0, /*dir=*/0x2000000000c0, /*flags=MS_LAZYTIME|MS_STRICTATIME|MS_RDONLY|MS_NOEXEC*/ 0x3000009, /*opts=*/0, /*chdir=*/0, /*size=*/0, /*img=*/0)); break; case 2: // mkdirat arguments: [ // fd: fd_dir (resource) // path: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8) // } // mode: open_mode = 0x14e174135c0b87af (8 bytes) // ] NONFAILING(memcpy((void*)0x200000000040, "./file1\000", 8)); syscall( __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000040ul, /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IRGRP|S_IWUSR|S_IRUSR|0x14e174135c0b8600*/ 0x14e174135c0b87aful); break; case 3: // mount$overlay arguments: [ // src: const = 0x0 (8 bytes) // dst: ptr[in, buffer] { // buffer: {2e 2f 62 75 73 00} (length 0x6) // } // type: ptr[in, buffer] { // buffer: {6f 76 65 72 6c 61 79 00} (length 0x8) // } // flags: mount_flags = 0x40 (8 bytes) // opts: ptr[in, fs_options[overlay_options]] { // fs_options[overlay_options] { // elems: array[fs_opt_elem[overlay_options]] { // fs_opt_elem[overlay_options] { // elem: union overlay_options { // workdir: fs_opt["workdir", stringnoz[filename]] { // name: buffer: {77 6f 72 6b 64 69 72} (length 0x7) // eq: const = 0x3d (1 bytes) // val: buffer: {2e 2f 62 75 73} (length 0x5) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[overlay_options] { // elem: union overlay_options { // lowerdir: fs_opt["lowerdir", stringnoz[filename]] { // name: buffer: {6c 6f 77 65 72 64 69 72} (length 0x8) // eq: const = 0x3d (1 bytes) // val: buffer: {2e 2f 66 69 6c 65 30} (length 0x7) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[overlay_options] { // elem: union overlay_options { // upperdir: fs_opt["upperdir", stringnoz[filename]] { // name: buffer: {75 70 70 65 72 64 69 72} (length 0x8) // eq: const = 0x3d (1 bytes) // val: buffer: {2e 2f 66 69 6c 65 31} (length 0x7) // } // } // comma: const = 0x2c (1 bytes) // } // } // common: array[fs_opt_elem[fs_options_common]] { // } // null: const = 0x0 (1 bytes) // } // } // ] NONFAILING(memcpy((void*)0x2000000000c0, "./bus\000", 6)); NONFAILING(memcpy((void*)0x200000000080, "overlay\000", 8)); NONFAILING(memcpy((void*)0x200000000240, "workdir", 7)); NONFAILING(*(uint8_t*)0x200000000247 = 0x3d); NONFAILING(memcpy((void*)0x200000000248, "./bus", 5)); NONFAILING(*(uint8_t*)0x20000000024d = 0x2c); NONFAILING(memcpy((void*)0x20000000024e, "lowerdir", 8)); NONFAILING(*(uint8_t*)0x200000000256 = 0x3d); NONFAILING(memcpy((void*)0x200000000257, "./file0", 7)); NONFAILING(*(uint8_t*)0x20000000025e = 0x2c); NONFAILING(memcpy((void*)0x20000000025f, "upperdir", 8)); NONFAILING(*(uint8_t*)0x200000000267 = 0x3d); NONFAILING(memcpy((void*)0x200000000268, "./file1", 7)); NONFAILING(*(uint8_t*)0x20000000026f = 0x2c); NONFAILING(*(uint8_t*)0x200000000270 = 0); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x2000000000c0ul, /*type=*/0x200000000080ul, /*flags=MS_MANDLOCK*/ 0x40ul, /*opts=*/0x200000000240ul); break; case 4: // syz_mount_image$fuse arguments: [ // fs: ptr[in, buffer] { // buffer: {66 75 73 65 00} (length 0x5) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 62 75 73 00} (length 0x6) // } // flags: mount_flags = 0x322020 (8 bytes) // opts: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // } // } // chdir: int8 = 0x1 (1 bytes) // size: const = 0x0 (8 bytes) // img: nil // ] // returns fd_dir NONFAILING(memcpy((void*)0x2000000001c0, "fuse\000", 5)); NONFAILING(memcpy((void*)0x2000000002c0, "./bus\000", 6)); NONFAILING(syz_mount_image( /*fs=*/0x2000000001c0, /*dir=*/0x2000000002c0, /*flags=MS_SHARED|MS_UNBINDABLE|MS_REMOUNT|MS_RELATIME|MS_MOVE*/ 0x322020, /*opts=*/0x200000000100, /*chdir=*/1, /*size=*/0, /*img=*/0)); break; case 5: // bpf$PROG_LOAD arguments: [ // cmd: const = 0x5 (8 bytes) // arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32], // bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] { // bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types, // bpf_btf_id[opt], fd_bpf_prog[opt]] { // type: bpf_prog_type = 0x2 (4 bytes) // ninsn: bytesize8 = 0x4 (4 bytes) // insns: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // union ANYUNION { // ANYBLOB: buffer: {18 00 00 00 03 00 00 00 00 00 00 00 fe ff // ff 10 85 00 00 00 07 00 00 00 95} (length 0x19) // } // } // } // license: nil // loglev: int32 = 0x119f (4 bytes) // logsize: len = 0x0 (4 bytes) // log: nil // kern_version: bpf_kern_version = 0x40e00 (4 bytes) // flags: bpf_prog_load_flags = 0x5a (4 bytes) // prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 // 00} (length 0x10) prog_ifindex: ifindex (resource) // expected_attach_type: union bpf_prog_attach_types { // fallback: bpf_attach_types = 0x30 (4 bytes) // } // btf_fd: fd_btf (resource) // func_info_rec_size: const = 0x0 (4 bytes) // func_info: nil // func_info_cnt: len = 0x0 (4 bytes) // line_info_rec_size: const = 0x0 (4 bytes) // line_info: nil // line_info_cnt: len = 0x0 (4 bytes) // attach_btf_id: bpf_btf_id (resource) // attach_prog_fd: fd_bpf_prog (resource) // core_relo_cnt: len = 0x0 (4 bytes) // fd_array: nil // core_relos: nil // core_relo_rec_size: const = 0x0 (4 bytes) // log_true_size: int32 = 0x8 (4 bytes) // prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32], // bpf_prog_attach_types, bpf_btf_id[opt], // fd_bpf_prog[opt]]_prog_token_fd_wrapper { // void: buffer: {} (length 0x0) // } // pad: union _bpf_prog_t[flags[bpf_prog_type, int32], // bpf_prog_attach_types, bpf_btf_id[opt], // fd_bpf_prog[opt]]_pad_wrapper { // value: const = 0x0 (4 bytes) // } // } // } // size: len = 0x94 (8 bytes) // ] // returns fd_bpf_prog NONFAILING(*(uint32_t*)0x200000000600 = 2); NONFAILING(*(uint32_t*)0x200000000604 = 4); NONFAILING(*(uint64_t*)0x200000000608 = 0x200000000200); NONFAILING(memcpy((void*)0x200000000200, "\x18\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\xfe\xff" "\xff\x10\x85\x00\x00\x00\x07\x00\x00\x00\x95", 25)); NONFAILING(*(uint64_t*)0x200000000610 = 0); NONFAILING(*(uint32_t*)0x200000000618 = 0x119f); NONFAILING(*(uint32_t*)0x20000000061c = 0); NONFAILING(*(uint64_t*)0x200000000620 = 0); NONFAILING(*(uint32_t*)0x200000000628 = 0x40e00); NONFAILING(*(uint32_t*)0x20000000062c = 0x5a); NONFAILING(memset((void*)0x200000000630, 0, 16)); NONFAILING(*(uint32_t*)0x200000000640 = 0); NONFAILING(*(uint32_t*)0x200000000644 = 0x30); NONFAILING(*(uint32_t*)0x200000000648 = 0); NONFAILING(*(uint32_t*)0x20000000064c = 0); NONFAILING(*(uint64_t*)0x200000000650 = 0); NONFAILING(*(uint32_t*)0x200000000658 = 0); NONFAILING(*(uint32_t*)0x20000000065c = 0); NONFAILING(*(uint64_t*)0x200000000660 = 0); NONFAILING(*(uint32_t*)0x200000000668 = 0); NONFAILING(*(uint32_t*)0x20000000066c = 0); NONFAILING(*(uint32_t*)0x200000000670 = 0); NONFAILING(*(uint32_t*)0x200000000674 = 0); NONFAILING(*(uint64_t*)0x200000000678 = 0); NONFAILING(*(uint64_t*)0x200000000680 = 0); NONFAILING(*(uint32_t*)0x200000000688 = 0); NONFAILING(*(uint32_t*)0x20000000068c = 8); NONFAILING(*(uint32_t*)0x200000000690 = 0); syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000600ul, /*size=*/0x94ul); break; case 6: // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // flags: open_flags = 0x20842 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd NONFAILING(memcpy((void*)0x20000000c380, "./file0\000", 8)); syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000000c380ul, /*flags=O_NONBLOCK|O_NOFOLLOW|O_CREAT|O_RDWR*/ 0x20842, /*mode=*/0); break; case 7: // bpf$PROG_LOAD arguments: [ // cmd: const = 0x5 (8 bytes) // arg: ptr[in, bpf_prog_t[flags[bpf_prog_type, int32], // bpf_prog_attach_types, bpf_btf_id[opt], fd_bpf_prog[opt]]] { // bpf_prog_t[flags[bpf_prog_type, int32], bpf_prog_attach_types, // bpf_btf_id[opt], fd_bpf_prog[opt]] { // type: bpf_prog_type = 0x2 (4 bytes) // ninsn: bytesize8 = 0x4 (4 bytes) // insns: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // } // } // license: ptr[in, buffer] { // buffer: {47 50 4c 00} (length 0x4) // } // loglev: int32 = 0x0 (4 bytes) // logsize: len = 0x0 (4 bytes) // log: nil // kern_version: bpf_kern_version = 0x40e00 (4 bytes) // flags: bpf_prog_load_flags = 0x5a (4 bytes) // prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 // 00} (length 0x10) prog_ifindex: ifindex (resource) // expected_attach_type: union bpf_prog_attach_types { // fallback: bpf_attach_types = 0x30 (4 bytes) // } // btf_fd: fd_btf (resource) // func_info_rec_size: const = 0x0 (4 bytes) // func_info: nil // func_info_cnt: len = 0x0 (4 bytes) // line_info_rec_size: const = 0x0 (4 bytes) // line_info: nil // line_info_cnt: len = 0x0 (4 bytes) // attach_btf_id: bpf_btf_id (resource) // attach_prog_fd: fd_bpf_prog (resource) // core_relo_cnt: len = 0x0 (4 bytes) // fd_array: nil // core_relos: nil // core_relo_rec_size: const = 0x0 (4 bytes) // log_true_size: int32 = 0x0 (4 bytes) // prog_token_fd: union _bpf_prog_t[flags[bpf_prog_type, int32], // bpf_prog_attach_types, bpf_btf_id[opt], // fd_bpf_prog[opt]]_prog_token_fd_wrapper { // void: buffer: {} (length 0x0) // } // pad: union _bpf_prog_t[flags[bpf_prog_type, int32], // bpf_prog_attach_types, bpf_btf_id[opt], // fd_bpf_prog[opt]]_pad_wrapper { // value: const = 0x0 (4 bytes) // } // } // } // size: len = 0x94 (8 bytes) // ] // returns fd_bpf_prog NONFAILING(*(uint32_t*)0x200000000040 = 2); NONFAILING(*(uint32_t*)0x200000000044 = 4); NONFAILING(*(uint64_t*)0x200000000048 = 0x200000000200); NONFAILING(*(uint64_t*)0x200000000050 = 0x200000000000); NONFAILING(memcpy((void*)0x200000000000, "GPL\000", 4)); NONFAILING(*(uint32_t*)0x200000000058 = 0); NONFAILING(*(uint32_t*)0x20000000005c = 0); NONFAILING(*(uint64_t*)0x200000000060 = 0); NONFAILING(*(uint32_t*)0x200000000068 = 0x40e00); NONFAILING(*(uint32_t*)0x20000000006c = 0x5a); NONFAILING(memset((void*)0x200000000070, 0, 16)); NONFAILING(*(uint32_t*)0x200000000080 = 0); NONFAILING(*(uint32_t*)0x200000000084 = 0x30); NONFAILING(*(uint32_t*)0x200000000088 = 0); NONFAILING(*(uint32_t*)0x20000000008c = 0); NONFAILING(*(uint64_t*)0x200000000090 = 0); NONFAILING(*(uint32_t*)0x200000000098 = 0); NONFAILING(*(uint32_t*)0x20000000009c = 0); NONFAILING(*(uint64_t*)0x2000000000a0 = 0); NONFAILING(*(uint32_t*)0x2000000000a8 = 0); NONFAILING(*(uint32_t*)0x2000000000ac = 0); NONFAILING(*(uint32_t*)0x2000000000b0 = 0); NONFAILING(*(uint32_t*)0x2000000000b4 = 0); NONFAILING(*(uint64_t*)0x2000000000b8 = 0); NONFAILING(*(uint64_t*)0x2000000000c0 = 0); NONFAILING(*(uint32_t*)0x2000000000c8 = 0); NONFAILING(*(uint32_t*)0x2000000000cc = 0); NONFAILING(*(uint32_t*)0x2000000000d0 = 0); res = syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000040ul, /*size=*/0x94ul); if (res != -1) r[0] = res; break; case 8: // bpf$BPF_LINK_CREATE_XDP arguments: [ // cmd: const = 0x1c (8 bytes) // arg: ptr[in, bpf_link_create_arg_t[fd_bpf_prog_xdp, ifindex, // const[BPF_XDP, int32], flags[xdp_flags, int32]]] { // bpf_link_create_arg_t[fd_bpf_prog_xdp, ifindex, const[BPF_XDP, // int32], flags[xdp_flags, int32]] { // prog_fd: fd_bpf_prog_xdp (resource) // target_fd: ifindex (resource) // attach_type: const = 0x30 (4 bytes) // flags: xdp_flags = 0x0 (4 bytes) // extra: union optional[link_create_arg_extra] { // val: union link_create_arg_extra { // uprobe_multi: link_create_uprobe_multi { // path: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // offsets: ptr[in, array[int64]] { // array[int64] { // int64 = 0x0 (8 bytes) // } // } // ref_ctr_offsets: nil // cookies: int64 = 0x0 (8 bytes) // cnt: len = 0x1 (4 bytes) // flags: bpf_link_create_uprobe_multi_flags = 0x1 (4 bytes) // pid: pid (resource) // pad = 0x0 (4 bytes) // } // } // } // } // } // size: len = 0x40 (8 bytes) // ] // returns fd_bpf_link NONFAILING(*(uint32_t*)0x2000000012c0 = r[0]); NONFAILING(*(uint32_t*)0x2000000012c4 = 0); NONFAILING(*(uint32_t*)0x2000000012c8 = 0x30); NONFAILING(*(uint32_t*)0x2000000012cc = 0); NONFAILING(*(uint64_t*)0x2000000012d0 = 0x200000000140); NONFAILING(memcpy((void*)0x200000000140, "./file0\000", 8)); NONFAILING(*(uint64_t*)0x2000000012d8 = 0x2000000001c0); NONFAILING(*(uint64_t*)0x2000000001c0 = 0); NONFAILING(*(uint64_t*)0x2000000012e0 = 0); NONFAILING(*(uint64_t*)0x2000000012e8 = 0); NONFAILING(*(uint32_t*)0x2000000012f0 = 1); NONFAILING(*(uint32_t*)0x2000000012f4 = 1); NONFAILING(*(uint32_t*)0x2000000012f8 = 0); syscall(__NR_bpf, /*cmd=*/0x1cul, /*arg=*/0x2000000012c0ul, /*size=*/0x40ul); break; } } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000, /*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=*/0x1000, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); setup_sysctl(); const char* reason; (void)reason; install_segv_handler(); for (procid = 0; procid < 4; procid++) { if (fork() == 0) { loop(); } } sleep(1000000); return 0; }