// https://syzkaller.appspot.com/bug?id=fc426eba19283205cbebccf5103e9cc5b3809b2f // 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 #include #include #include #include #include #include #include #include #include #include #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 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; } struct nlmsg { char* pos; int nesting; struct nlattr* nested[8]; char buf[4096]; }; static void netlink_init(struct nlmsg* nlmsg, int typ, int flags, const void* data, int size) { memset(nlmsg, 0, sizeof(*nlmsg)); struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf; hdr->nlmsg_type = typ; hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags; memcpy(hdr + 1, data, size); nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size); } static void netlink_attr(struct nlmsg* nlmsg, int typ, const void* data, int size) { struct nlattr* attr = (struct nlattr*)nlmsg->pos; attr->nla_len = sizeof(*attr) + size; attr->nla_type = typ; if (size > 0) memcpy(attr + 1, data, size); nlmsg->pos += NLMSG_ALIGN(attr->nla_len); } static void netlink_nest(struct nlmsg* nlmsg, int typ) { struct nlattr* attr = (struct nlattr*)nlmsg->pos; attr->nla_type = typ; nlmsg->pos += sizeof(*attr); nlmsg->nested[nlmsg->nesting++] = attr; } static void netlink_done(struct nlmsg* nlmsg) { struct nlattr* attr = nlmsg->nested[--nlmsg->nesting]; attr->nla_len = nlmsg->pos - (char*)attr; } static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type, int* reply_len, bool dofail) { if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting) exit(1); struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf; hdr->nlmsg_len = nlmsg->pos - nlmsg->buf; struct sockaddr_nl addr; memset(&addr, 0, sizeof(addr)); addr.nl_family = AF_NETLINK; ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0, (struct sockaddr*)&addr, sizeof(addr)); if (n != (ssize_t)hdr->nlmsg_len) { if (dofail) exit(1); return -1; } n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); if (reply_len) *reply_len = 0; if (n < 0) { if (dofail) exit(1); return -1; } if (n < (ssize_t)sizeof(struct nlmsghdr)) { errno = EINVAL; if (dofail) exit(1); return -1; } if (hdr->nlmsg_type == NLMSG_DONE) return 0; if (reply_len && hdr->nlmsg_type == reply_type) { *reply_len = n; return 0; } if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) { errno = EINVAL; if (dofail) exit(1); return -1; } if (hdr->nlmsg_type != NLMSG_ERROR) { errno = EINVAL; if (dofail) exit(1); return -1; } errno = -((struct nlmsgerr*)(hdr + 1))->error; return -errno; } static int netlink_send(struct nlmsg* nlmsg, int sock) { return netlink_send_ext(nlmsg, sock, 0, NULL, true); } static int netlink_query_family_id(struct nlmsg* nlmsg, int sock, const char* family_name, bool dofail) { struct genlmsghdr genlhdr; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = CTRL_CMD_GETFAMILY; netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name, strnlen(family_name, GENL_NAMSIZ - 1) + 1); int n = 0; int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail); if (err < 0) { return -1; } uint16_t id = 0; struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN + NLMSG_ALIGN(sizeof(genlhdr))); for (; (char*)attr < nlmsg->buf + n; attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) { if (attr->nla_type == CTRL_ATTR_FAMILY_ID) { id = *(uint16_t*)(attr + 1); break; } } if (!id) { errno = EINVAL; return -1; } recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); return id; } static void netlink_add_device_impl(struct nlmsg* nlmsg, const char* type, const char* name, bool up) { struct ifinfomsg hdr; memset(&hdr, 0, sizeof(hdr)); if (up) hdr.ifi_flags = hdr.ifi_change = IFF_UP; netlink_init(nlmsg, RTM_NEWLINK, NLM_F_EXCL | NLM_F_CREATE, &hdr, sizeof(hdr)); if (name) netlink_attr(nlmsg, IFLA_IFNAME, name, strlen(name)); netlink_nest(nlmsg, IFLA_LINKINFO); netlink_attr(nlmsg, IFLA_INFO_KIND, type, strlen(type)); } static void netlink_device_change(struct nlmsg* nlmsg, int sock, const char* name, bool up, const char* master, const void* mac, int macsize, const char* new_name) { struct ifinfomsg hdr; memset(&hdr, 0, sizeof(hdr)); if (up) hdr.ifi_flags = hdr.ifi_change = IFF_UP; hdr.ifi_index = if_nametoindex(name); netlink_init(nlmsg, RTM_NEWLINK, 0, &hdr, sizeof(hdr)); if (new_name) netlink_attr(nlmsg, IFLA_IFNAME, new_name, strlen(new_name)); if (master) { int ifindex = if_nametoindex(master); netlink_attr(nlmsg, IFLA_MASTER, &ifindex, sizeof(ifindex)); } if (macsize) netlink_attr(nlmsg, IFLA_ADDRESS, mac, macsize); int err = netlink_send(nlmsg, sock); if (err < 0) { } } static struct nlmsg nlmsg; //% 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, 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 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, loopfd = -1, 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) { memset(loopname, 0, sizeof(loopname)); snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid); if (setup_loop_device(data, size, loopname, &loopfd) == -1) return -1; 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"); } 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) { ioctl(loopfd, LOOP_CLR_FD, 0); close(loopfd); } errno = err; return res; } static int inject_fault(int nth) { int fd; fd = open("/proc/thread-self/fail-nth", O_RDWR); if (fd == -1) exit(1); char buf[16]; sprintf(buf, "%d", nth); if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf)) exit(1); return fd; } 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_fault() { static struct { const char* file; const char* val; bool fatal; } files[] = { {"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true}, {"/sys/kernel/debug/fail_futex/ignore-private", "N", false}, {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false}, {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false}, {"/sys/kernel/debug/fail_page_alloc/min-order", "0", false}, }; unsigned i; for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) { if (!write_file(files[i].file, files[i].val)) { if (files[i].fatal) exit(1); } } } static void setup_sysctl() { char mypid[32]; snprintf(mypid, sizeof(mypid), "%d", getpid()); 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"}, {"/proc/sys/kernel/ctrl-alt-del", "0"}, {"/proc/sys/kernel/cad_pid", mypid}, }; for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) { if (!write_file(files[i].name, files[i].data)) printf("write to %s failed: %s\n", files[i].name, strerror(errno)); } } #define NL802154_CMD_SET_SHORT_ADDR 11 #define NL802154_ATTR_IFINDEX 3 #define NL802154_ATTR_SHORT_ADDR 10 static void setup_802154() { int sock_route = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); if (sock_route == -1) exit(1); int sock_generic = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (sock_generic < 0) exit(1); int nl802154_family_id = netlink_query_family_id(&nlmsg, sock_generic, "nl802154", true); for (int i = 0; i < 2; i++) { char devname[] = "wpan0"; devname[strlen(devname) - 1] += i; uint64_t hwaddr = 0xaaaaaaaaaaaa0002 + (i << 8); uint16_t shortaddr = 0xaaa0 + i; int ifindex = if_nametoindex(devname); struct genlmsghdr genlhdr; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = NL802154_CMD_SET_SHORT_ADDR; netlink_init(&nlmsg, nl802154_family_id, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(&nlmsg, NL802154_ATTR_IFINDEX, &ifindex, sizeof(ifindex)); netlink_attr(&nlmsg, NL802154_ATTR_SHORT_ADDR, &shortaddr, sizeof(shortaddr)); int err = netlink_send(&nlmsg, sock_generic); if (err < 0) { } netlink_device_change(&nlmsg, sock_route, devname, true, 0, &hwaddr, sizeof(hwaddr), 0); if (i == 0) { netlink_add_device_impl(&nlmsg, "lowpan", "lowpan0", false); netlink_done(&nlmsg); netlink_attr(&nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex)); int err = netlink_send(&nlmsg, sock_route); if (err < 0) { } } } close(sock_route); close(sock_generic); } 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 (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } void execute_one(void) { NONFAILING(memcpy((void*)0x20000c00, "udf\000", 4)); NONFAILING(memcpy((void*)0x20000180, "./bus\000", 6)); NONFAILING(memcpy( (void*)0x20000380, "\x00\x0d\x4b\xb7\x2c\x5e\x18\xda\xa2\x25\x8a\xc1\x45\x99\x03\xd9\x0b\x82" "\x4c\xc9\x1b\x6b\x0e\x94\x57\x7a\xb5\xfc\x26\x47\x02\xec\xef\x5e\xb4\x69" "\x41\x04\xe0\xfd\x15\x01\x00\x4b\x4d\x03\x32\xdc\x86\x11\x45\xd0\x53\x1a" "\x4e\xf1\x2a\x12\x85\xf6\xba\x7c\x84\xd4\x47\xf5\x8d\x38\x27\x76\xe8\x35" "\x1e\x12\x42\x86\xaf\x3d\xc7\x02\x6b\xde\xa9\x5b\xa4\x02\xb4\x5a\x5b\xab" "\x50\x28\xce\x6b\x2d\xcf\x3b\xe6\xa4\x45\x41\x5c\x54\x33\xb5\x46\x8b\x44" "\x9f\xb3\x5d\x1f\x95\x4e\x73\xd4\x4b\xcb\x27\x65\xef\x8c\x73\xa3\x78\x31" "\x56\x3a\xd2\x67\x54\x20\xc2\x10\xea\x5d\xbc\x9c\xbf\x1f\x55\x2b\xae\xaf" "\x2c\x45\xa6\x65\xea\x9d\xc5\x75\xfc\xee\xcc\xb0\x38\x2d\x88\x44\x66\xf4" "\x00\x8f\x6c\xe5\xd1\x42\x52\xba\xc0\x87\x1b\x1b\x3f\x77\x3d\x23\x08\x3e" "\x57\x47\x51\x02\xe1\xe2\xa3\x79\xf8\xf6\x08\x00\x00\x00\x00\x00\x00\x00" "\xfa\x74\xd1\x7b\x0f\xd1\x82\x7d\x8f\xe8", 208)); NONFAILING(memcpy( (void*)0x20000cc0, "\x78\x9c\xec\xdd\x41\x6c\x1c\xd7\x79\x07\xf0\xef\x0d\x49\x91\x92\x8b\x64" "\xeb\x58\xb2\x93\x1a\xc1\xda\x05\x1c\x55\x69\x54\x92\x8a\x2d\x1b\x0c\x50" "\xab\x66\x89\xa6\x51\x6c\xd6\x14\x93\xb6\xee\xc1\x2b\x71\xa5\x6e\x45\x2d" "\x17\x24\xe5\xc8\x46\x9b\xb8\x27\x1f\x5a\xa0\x6c\x0a\xf4\xd2\x14\x28\x50" "\xa4\x30\x7a\x08\xd8\x43\x0e\xed\x29\x05\x0a\xf4\x4a\x14\xb9\x15\x05\xd4" "\x34\x75\x5d\x14\x05\xf6\x10\x23\x97\xc2\x2c\x66\xf6\x2d\xb9\x92\x68\x8b" "\x30\x45\x51\x92\x7f\x3f\x40\xfa\x0f\x67\xbf\xb7\x3b\xf3\xde\x7a\x66\xb8" "\x6f\xc7\x0a\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\x20\xe2" "\x57\x7e\xf5\xcc\xf8\x44\x3a\xe8\xad\x00\x00\xee\xa6\x17\xe7\x5e\x1e\x9f" "\x74\xfe\x07\x80\x8f\x95\x73\x7e\xff\x07\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x80\x7b\x5d\x8a\x22\xde\x8d\x14\xdf\x78\xbc\x9b\x5e\xad\x7e\xee" "\x19\x3b\xdb\x6a\x5f\xbd\x36\x3f\x3d\xb3\x73\xb3\xc3\xa9\x6a\x39\x54\xd5" "\x97\x7f\xc6\x26\x26\x4f\x7d\xf1\xe9\x67\x4e\x3f\xdb\xcf\x0f\x6f\x7f\xa7" "\x7d\x3a\x5e\x9a\x3b\x77\xa6\xfe\xc2\xd2\x95\xce\x72\x73\x65\xa5\xb9\x50" "\x9f\x6f\xb7\x2e\x2c\x2d\x34\x77\xfd\x0c\x7b\x6d\x7f\xb3\x13\x55\x07\xd4" "\xaf\x5c\xbe\xba\x70\xf1\xe2\x4a\x7d\xf2\xe4\xa9\x1b\x1e\xbe\x56\x7b\x67" "\xf4\xa1\x63\xb5\xa9\xd3\x13\xaf\x1c\xed\xd7\xce\x4f\xcf\xcc\xcc\x0d\xd4" "\x0c\x8f\x7c\xe4\x57\xbf\xc5\x07\xdd\xe1\x71\x28\x8a\xb8\x18\x29\x2e\xbf" "\xfd\x6e\x6a\x44\x44\x11\x7b\xef\x8b\xdb\xbc\x77\xf6\xdb\xe1\x6a\x27\x4e" "\x54\x3b\x31\x3f\x3d\x53\xed\xc8\x62\xab\xd1\x5e\x2d\x1f\x9c\xed\x77\x44" "\x11\x51\x1b\x68\xf4\x7c\xbf\x8f\xee\xc2\x58\xec\x49\x3d\xe2\xcd\x72\xf3" "\xcb\x0d\x3e\x51\xee\xde\x5c\xa7\xb1\xdc\x38\xbf\xd8\xac\xcf\x36\x96\x57" "\x5b\xab\xad\xa5\xf6\x6c\xea\x6d\x6d\xaa\xca\x8b\x78\x36\x45\x74\x22\xa2" "\x3b\x7a\xeb\xd3\x8d\x44\x11\xdf\x8c\x14\x6f\x7d\xa7\x9b\xce\x47\xc4\x50" "\xbf\x1f\x3e\x5f\xdd\x18\x7c\xfb\xed\x29\xf6\x61\x1f\x77\x61\x38\x22\x6a" "\x23\x11\x1b\xc5\x7d\x30\x66\xf7\xb0\xd1\x28\xe2\x7b\x91\xe2\xdb\xdf\x1a" "\x8f\x0b\xb9\x5f\xab\x6e\x7b\x2a\xe2\xab\x65\x1e\x8b\xb8\x5a\xe6\xf5\x88" "\xb5\x32\x3f\x1b\x91\xca\x37\xc8\x23\x11\xef\xed\xf0\x7e\xe2\xfe\x32\x1c" "\x45\xfc\x51\xa4\xf8\xc9\x54\x37\x2d\xf4\xc7\xbe\x3a\xae\x9c\xfd\x5a\xfd" "\xcb\xed\x8b\x4b\x03\xb5\xfd\xe3\xca\x7d\x7f\x7e\xb8\x9b\xee\xf1\x63\xd3" "\x58\x14\xd1\xa8\x8e\xf8\xdd\xf4\xd1\x2f\x76\x00\x00\x00\x00\x00\xb8\xf7" "\x14\xf1\xa7\x91\xe2\x89\x1f\x1e\x4f\x9d\x18\x9c\x53\x6c\xb5\x2f\xd5\xcf" "\x35\xce\x2f\xf6\x3e\x15\xee\x7f\xf6\x5f\xcf\xad\x36\x37\x37\x37\x6b\xa9" 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"\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\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\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\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\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" 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"\xee\x86\xf2\xfc\xff\xf5\x48\xf1\x0f\x7f\xf6\xaf\x5b\xd7\x3b\xf9\xfc\xff" "\x33\xbd\x9f\xb6\xaf\xff\x7e\xfa\xcd\xed\xf3\xff\xd4\xcd\x4f\xb4\x4f\xe7" "\xff\x4f\x0d\xac\x9b\xca\x57\x23\x23\xc3\x11\x63\xab\x57\x3a\x23\x8f\x46" "\x8c\xad\xbc\xfe\xc6\x17\x5a\x57\x1a\x97\x9a\x97\x9a\xed\x53\xa7\x9f\x7b" "\x66\x72\xfc\xb9\x89\xf1\x53\x23\x87\xfa\x17\x77\xdb\x4b\x7b\xee\xab\x07" "\x51\x39\xfe\xbf\x17\x29\xbe\xf7\xa3\xbf\x8d\xcf\xe5\x75\x37\x5e\xff\xed" "\x7c\xfd\x7f\xe4\xe6\x27\xda\xa7\xf1\x7f\x64\x60\xdd\x91\x1b\xae\x57\xf6" "\xbc\xeb\xe4\xf1\xff\xbf\x48\xf1\xcf\xd3\x3f\x88\xe3\x79\xdd\x87\x5d\xff" "\xf7\x7f\xff\x3f\x9e\x2f\xc2\xb7\xae\xcf\xf7\x69\xfc\x8f\x0e\xac\xab\x7e" "\xc7\xfb\x44\xc4\x2f\x0c\xac\x3b\x7e\x34\xe2\x81\xfb\xa5\x0c\x00\x00\x00" "\xee\xb0\x94\x8a\xf8\x41\x9e\x4f\x1d\xbf\xcd\x7c\xea\x3f\x45\x8a\x37\xfe" "\xfb\x17\x73\x5d\x3a\x56\xd6\x3d\x9f\x1f\xaf\x55\x7f\x8f\xbd\xb8\xd4\xfe" "\xc2\x99\xc5\xc5\xa5\x0b\x8d\xd5\xc6\xf9\xc5\x66\x7d\xae\xd3\xb8\xd0\x2c" "\xdb\xfe\x38\x52\x74\xff\xfa\xf1\xdc\xb6\xa8\xe6\x57\xfb\xf3\xcd\xbd\x39" "\xde\xed\xb9\xd8\x7f\x89\x14\xcf\xfd\x5a\xbf\xb6\x37\x17\xdb\xff\x6c\xea" "\x91\xed\xda\x89\xb2\xf6\x64\xa4\xf8\x93\x17\x6f\xac\xed\x7f\x8e\x71\x74" "\xbb\x76\xb2\xac\xfd\xb7\x48\x31\xf1\xca\xce\xb5\xc7\xb6\x6b\x4f\x95\xb5" "\xff\x15\x29\x7e\xfa\x17\xf5\x7e\xed\x91\xb2\xf6\x4b\xb9\xf6\xd1\xed\xda" "\x93\x17\x96\x16\x17\xf6\x61\x58\x00\x00\x00\x00\x00\x60\x4f\x46\x52\x11" "\xcf\x44\x8a\xbf\x3f\x35\x9c\xfa\x9f\x6f\xef\xe6\xfb\x9f\xb7\x7c\xe8\xbd" "\x4f\xdf\xff\x7b\x74\x60\xdd\xc2\x5d\xba\x5f\x65\xcf\x9d\x0a\x00\xf7\xb8" "\xf2\xfc\x7f\xbc\x3c\xab\xff\xf2\x5f\x6d\xcd\xe5\xdf\x78\xfe\xdf\xfe\xff" "\x00\x0c\x9e\xff\x6f\x36\xf8\xef\x06\x7c\xd0\xf2\x47\x39\xff\xd7\xee\xcc" "\x6e\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\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\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\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\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\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\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x7c\xec\xa4\x28\x62\x29\x52\x7c\xe3\xf1\x6e\xba\x3e\x5a\xfe\xdc" "\x33\x76\xb6\xd5\xbe\x7a\x6d\x7e\x7a\x66\xe7\x66\x87\x53\xd5\x72\xa8\xaa" "\x2f\xff\x8c\x4d\x4c\x9e\xfa\xe2\xd3\xcf\x9c\x7e\xb6\x9f\x1f\xde\xfe\x4e" "\xfb\x74\xbc\x34\x77\xee\x4c\xfd\x85\xa5\x2b\x9d\xe5\xe6\xca\x4a\x73\xa1" "\x3e\xdf\x6e\x5d\x58\x5a\x68\xee\xfa\x19\xf6\xda\xfe\x66\x27\xaa\x0e\xa8" "\x5f\xb9\x7c\x75\xe1\xe2\xc5\x95\xfa\xe4\xc9\x53\x37\x3c\x7c\xad\xf6\xce" "\xe8\x43\xc7\x6a\x53\xa7\x27\x5e\x39\xda\xaf\x9d\x9f\x9e\x99\x99\x1b\xa8" "\x19\x1e\xf9\xc8\xaf\x7e\x8b\xf4\x01\xeb\x0f\x45\x11\xff\x1b\x29\x2e\xbf" "\xfd\x6e\xfa\xf7\xd1\x88\x22\xf6\xde\x17\xb7\x79\xef\xec\xb7\xc3\xd5\x4e" "\x9c\xa8\x76\x62\x7e\x7a\xa6\xda\x91\xc5\x56\xa3\xbd\x5a\x3e\x38\xdb\xef" "\x88\x22\xa2\x36\xd0\xe8\xf9\x7e\x1f\xdd\x85\xb1\xd8\x93\x7a\xc4\x9b\xe5" "\xe6\x97\x1b\x7c\xa2\xdc\xbd\xb9\x4e\x63\xb9\x71\x7e\xb1\x59\x9f\x6d\x2c" "\xaf\xb6\x56\x5b\x4b\xed\xd9\xd4\xdb\xda\x54\x95\x17\xf1\x6c\x8a\xe8\x44" "\x44\x77\xf4\xd6\xa7\x1b\x89\x22\x46\x22\xc5\x5b\xdf\xe9\xa6\x1f\x8d\x46" "\x0c\xf5\xfb\xe1\xf3\x2f\xce\xbd\x3c\x3e\x79\xfb\xed\x29\xf6\x61\x1f\x77" "\x61\x38\x22\x6a\x23\x11\x1b\xc5\x7d\x30\x66\xf7\xb0\xd1\x28\xe2\xe9\x48" "\xf1\xed\x6f\x8d\xc7\x7f\x8c\xf6\xfa\xb5\xea\xb6\xa7\x22\xbe\x5a\xe6\xb1" "\x88\xab\x65\x5e\x8f\x58\x2b\xf3\xb3\x11\xa9\x7c\x83\x3c\x12\xf1\xde\x0e" "\xef\x27\xee\x2f\xc3\x51\xc4\xc3\x91\xe2\x27\x53\xdd\xf4\xe3\xd1\x3c\xf6" "\xd5\x71\xe5\xec\xd7\xea\x5f\x6e\x5f\x5c\x1a\xa8\xed\x1f\x57\xee\xfb\xf3" "\xc3\xdd\x74\x8f\x1f\x9b\xc6\xa2\x88\x77\xab\x23\x7e\x37\xfd\xa7\xff\x9e" "\x01\x00\x00\x00\x00\x1e\x20\x45\x3c\x16\x29\x9e\xf8\xe1\xf1\x54\xcd\x0f" "\x6e\xcd\x29\xb6\xda\x97\xea\xe7\x1a\xe7\x17\x7b\x1f\xeb\xf7\x3f\xfb\xaf" "\xe7\x56\x9b\x9b\x9b\x9b\xb5\xd4\xcb\xf1\x9c\xb3\x39\x3b\x39\xd7\x72\xae" "\xe7\xdc\xc8\xd9\xcd\x59\x2b\x72\xfb\x9c\xb3\x39\x3b\x39\xd7\x72\xae\xe7" "\xdc\xc8\xd9\xcd\x59\x1b\xca\xed\x73\xce\xe6\xec\xe4\x5c\xcb\xb9\x9e\x73" "\x23\x67\x37\x67\x6d\x38\xb7\xcf\x39\x9b\xb3\x93\x73\x2d\xe7\x7a\xce\x8d" "\x9c\xdd\xe1\x83\x1c\x2f\x00\x00\x00\x00\x00\x00\x80\x9d\x15\x51\xc4\xe7" "\x22\xc5\x6b\xdf\xef\xa6\xcd\xd1\xde\x04\xef\xab\xd1\xcb\xeb\xee\x07\x7a" "\xe0\xfd\x7f\x00\x00\x00\xff\xff\x56\xe5\x5b\x7a", 3054)); NONFAILING(syz_mount_image(0x20000c00, 0x20000180, 0x200450, 0x20000380, 1, 0xbee, 0x20000cc0)); NONFAILING(memcpy((void*)0x20000040, "./file1\000", 8)); NONFAILING(memcpy((void*)0x20000100, "./bus\000", 6)); inject_fault(13); syscall(__NR_rename, 0x20000040ul, 0x20000100ul); } int main(void) { syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); setup_sysctl(); setup_fault(); setup_802154(); install_segv_handler(); loop(); return 0; }