// https://syzkaller.appspot.com/bug?id=762e7debe9358b9fb086b72671bc0b97bc686a88
// autogenerated by syzkaller (https://github.com/google/syzkaller)
#define _GNU_SOURCE
#include <arpa/inet.h>
#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <pthread.h>
#include <sched.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <linux/capability.h>
#include <linux/futex.h>
#include <linux/genetlink.h>
#include <linux/if_addr.h>
#include <linux/if_ether.h>
#include <linux/if_link.h>
#include <linux/if_tun.h>
#include <linux/in6.h>
#include <linux/ip.h>
#include <linux/loop.h>
#include <linux/neighbour.h>
#include <linux/net.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/tcp.h>
#include <linux/veth.h>
#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 use_temporary_dir(void)
{
char tmpdir_template[] = "./syzkaller.XXXXXX";
char* tmpdir = mkdtemp(tmpdir_template);
if (!tmpdir)
exit(1);
if (chmod(tmpdir, 0777))
exit(1);
if (chdir(tmpdir))
exit(1);
}
static void thread_start(void* (*fn)(void*), void* arg)
{
pthread_t th;
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setstacksize(&attr, 128 << 10);
int i = 0;
for (; i < 100; i++) {
if (pthread_create(&th, &attr, fn, arg) == 0) {
pthread_attr_destroy(&attr);
return;
}
if (errno == EAGAIN) {
usleep(50);
continue;
}
break;
}
exit(1);
}
typedef struct {
int state;
} event_t;
static void event_init(event_t* ev)
{
ev->state = 0;
}
static void event_reset(event_t* ev)
{
ev->state = 0;
}
static void event_set(event_t* ev)
{
if (ev->state)
exit(1);
__atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}
static void event_wait(event_t* ev)
{
while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}
static int event_isset(event_t* ev)
{
return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}
static int event_timedwait(event_t* ev, uint64_t timeout)
{
uint64_t start = current_time_ms();
uint64_t now = start;
for (;;) {
uint64_t remain = timeout - (now - start);
struct timespec ts;
ts.tv_sec = remain / 1000;
ts.tv_nsec = (remain % 1000) * 1000 * 1000;
syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
return 1;
now = current_time_ms();
if (now - start > timeout)
return 0;
}
}
static bool write_file(const char* file, const char* what, ...)
{
char buf[1024];
va_list args;
va_start(args, what);
vsnprintf(buf, sizeof(buf), what, args);
va_end(args);
buf[sizeof(buf) - 1] = 0;
int len = strlen(buf);
int fd = open(file, O_WRONLY | O_CLOEXEC);
if (fd == -1)
return false;
if (write(fd, buf, len) != len) {
int err = errno;
close(fd);
errno = err;
return false;
}
close(fd);
return true;
}
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 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_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 int netlink_add_addr(struct nlmsg* nlmsg, int sock, const char* dev,
const void* addr, int addrsize)
{
struct ifaddrmsg hdr;
memset(&hdr, 0, sizeof(hdr));
hdr.ifa_family = addrsize == 4 ? AF_INET : AF_INET6;
hdr.ifa_prefixlen = addrsize == 4 ? 24 : 120;
hdr.ifa_scope = RT_SCOPE_UNIVERSE;
hdr.ifa_index = if_nametoindex(dev);
netlink_init(nlmsg, RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr,
sizeof(hdr));
netlink_attr(nlmsg, IFA_LOCAL, addr, addrsize);
netlink_attr(nlmsg, IFA_ADDRESS, addr, addrsize);
return netlink_send(nlmsg, sock);
}
static void netlink_add_addr4(struct nlmsg* nlmsg, int sock, const char* dev,
const char* addr)
{
struct in_addr in_addr;
inet_pton(AF_INET, addr, &in_addr);
int err = netlink_add_addr(nlmsg, sock, dev, &in_addr, sizeof(in_addr));
if (err < 0) {
}
}
static void netlink_add_addr6(struct nlmsg* nlmsg, int sock, const char* dev,
const char* addr)
{
struct in6_addr in6_addr;
inet_pton(AF_INET6, addr, &in6_addr);
int err = netlink_add_addr(nlmsg, sock, dev, &in6_addr, sizeof(in6_addr));
if (err < 0) {
}
}
static void netlink_add_neigh(struct nlmsg* nlmsg, int sock, const char* name,
const void* addr, int addrsize, const void* mac,
int macsize)
{
struct ndmsg hdr;
memset(&hdr, 0, sizeof(hdr));
hdr.ndm_family = addrsize == 4 ? AF_INET : AF_INET6;
hdr.ndm_ifindex = if_nametoindex(name);
hdr.ndm_state = NUD_PERMANENT;
netlink_init(nlmsg, RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr,
sizeof(hdr));
netlink_attr(nlmsg, NDA_DST, addr, addrsize);
netlink_attr(nlmsg, NDA_LLADDR, mac, macsize);
int err = netlink_send(nlmsg, sock);
if (err < 0) {
}
}
static struct nlmsg nlmsg;
static int tunfd = -1;
#define TUN_IFACE "syz_tun"
#define LOCAL_MAC 0xaaaaaaaaaaaa
#define REMOTE_MAC 0xaaaaaaaaaabb
#define LOCAL_IPV4 "172.20.20.170"
#define REMOTE_IPV4 "172.20.20.187"
#define LOCAL_IPV6 "fe80::aa"
#define REMOTE_IPV6 "fe80::bb"
#define IFF_NAPI 0x0010
static void initialize_tun(void)
{
tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
if (tunfd == -1) {
printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n");
printf("otherwise fuzzing or reproducing might not work as intended\n");
return;
}
const int kTunFd = 200;
if (dup2(tunfd, kTunFd) < 0)
exit(1);
close(tunfd);
tunfd = kTunFd;
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, TUN_IFACE, IFNAMSIZ);
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) {
exit(1);
}
char sysctl[64];
sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/accept_dad", TUN_IFACE);
write_file(sysctl, "0");
sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/router_solicitations", TUN_IFACE);
write_file(sysctl, "0");
int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
if (sock == -1)
exit(1);
netlink_add_addr4(&nlmsg, sock, TUN_IFACE, LOCAL_IPV4);
netlink_add_addr6(&nlmsg, sock, TUN_IFACE, LOCAL_IPV6);
uint64_t macaddr = REMOTE_MAC;
struct in_addr in_addr;
inet_pton(AF_INET, REMOTE_IPV4, &in_addr);
netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in_addr, sizeof(in_addr),
&macaddr, ETH_ALEN);
struct in6_addr in6_addr;
inet_pton(AF_INET6, REMOTE_IPV6, &in6_addr);
netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in6_addr, sizeof(in6_addr),
&macaddr, ETH_ALEN);
macaddr = LOCAL_MAC;
netlink_device_change(&nlmsg, sock, TUN_IFACE, true, 0, &macaddr, ETH_ALEN,
NULL);
close(sock);
}
static int read_tun(char* data, int size)
{
if (tunfd < 0)
return -1;
int rv = read(tunfd, data, size);
if (rv < 0) {
if (errno == EAGAIN || errno == EBADF || errno == EBADFD)
return -1;
exit(1);
}
return rv;
}
static void flush_tun()
{
char data[1000];
while (read_tun(&data[0], sizeof(data)) != -1) {
}
}
#define MAX_FDS 30
//% 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");
}
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 XT_TABLE_SIZE 1536
#define XT_MAX_ENTRIES 10
struct xt_counters {
uint64_t pcnt, bcnt;
};
struct ipt_getinfo {
char name[32];
unsigned int valid_hooks;
unsigned int hook_entry[5];
unsigned int underflow[5];
unsigned int num_entries;
unsigned int size;
};
struct ipt_get_entries {
char name[32];
unsigned int size;
uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};
struct ipt_replace {
char name[32];
unsigned int valid_hooks;
unsigned int num_entries;
unsigned int size;
unsigned int hook_entry[5];
unsigned int underflow[5];
unsigned int num_counters;
struct xt_counters* counters;
uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};
struct ipt_table_desc {
const char* name;
struct ipt_getinfo info;
struct ipt_replace replace;
};
static struct ipt_table_desc ipv4_tables[] = {
{.name = "filter"}, {.name = "nat"}, {.name = "mangle"},
{.name = "raw"}, {.name = "security"},
};
static struct ipt_table_desc ipv6_tables[] = {
{.name = "filter"}, {.name = "nat"}, {.name = "mangle"},
{.name = "raw"}, {.name = "security"},
};
#define IPT_BASE_CTL 64
#define IPT_SO_SET_REPLACE (IPT_BASE_CTL)
#define IPT_SO_GET_INFO (IPT_BASE_CTL)
#define IPT_SO_GET_ENTRIES (IPT_BASE_CTL + 1)
struct arpt_getinfo {
char name[32];
unsigned int valid_hooks;
unsigned int hook_entry[3];
unsigned int underflow[3];
unsigned int num_entries;
unsigned int size;
};
struct arpt_get_entries {
char name[32];
unsigned int size;
uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};
struct arpt_replace {
char name[32];
unsigned int valid_hooks;
unsigned int num_entries;
unsigned int size;
unsigned int hook_entry[3];
unsigned int underflow[3];
unsigned int num_counters;
struct xt_counters* counters;
uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)];
};
struct arpt_table_desc {
const char* name;
struct arpt_getinfo info;
struct arpt_replace replace;
};
static struct arpt_table_desc arpt_tables[] = {
{.name = "filter"},
};
#define ARPT_BASE_CTL 96
#define ARPT_SO_SET_REPLACE (ARPT_BASE_CTL)
#define ARPT_SO_GET_INFO (ARPT_BASE_CTL)
#define ARPT_SO_GET_ENTRIES (ARPT_BASE_CTL + 1)
static void checkpoint_iptables(struct ipt_table_desc* tables, int num_tables,
int family, int level)
{
int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (int i = 0; i < num_tables; i++) {
struct ipt_table_desc* table = &tables[i];
strcpy(table->info.name, table->name);
strcpy(table->replace.name, table->name);
socklen_t optlen = sizeof(table->info);
if (getsockopt(fd, level, IPT_SO_GET_INFO, &table->info, &optlen)) {
switch (errno) {
case EPERM:
case ENOENT:
case ENOPROTOOPT:
continue;
}
exit(1);
}
if (table->info.size > sizeof(table->replace.entrytable))
exit(1);
if (table->info.num_entries > XT_MAX_ENTRIES)
exit(1);
struct ipt_get_entries entries;
memset(&entries, 0, sizeof(entries));
strcpy(entries.name, table->name);
entries.size = table->info.size;
optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size;
if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen))
exit(1);
table->replace.valid_hooks = table->info.valid_hooks;
table->replace.num_entries = table->info.num_entries;
table->replace.size = table->info.size;
memcpy(table->replace.hook_entry, table->info.hook_entry,
sizeof(table->replace.hook_entry));
memcpy(table->replace.underflow, table->info.underflow,
sizeof(table->replace.underflow));
memcpy(table->replace.entrytable, entries.entrytable, table->info.size);
}
close(fd);
}
static void reset_iptables(struct ipt_table_desc* tables, int num_tables,
int family, int level)
{
int fd = socket(family, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (int i = 0; i < num_tables; i++) {
struct ipt_table_desc* table = &tables[i];
if (table->info.valid_hooks == 0)
continue;
struct ipt_getinfo info;
memset(&info, 0, sizeof(info));
strcpy(info.name, table->name);
socklen_t optlen = sizeof(info);
if (getsockopt(fd, level, IPT_SO_GET_INFO, &info, &optlen))
exit(1);
if (memcmp(&table->info, &info, sizeof(table->info)) == 0) {
struct ipt_get_entries entries;
memset(&entries, 0, sizeof(entries));
strcpy(entries.name, table->name);
entries.size = table->info.size;
optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size;
if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen))
exit(1);
if (memcmp(table->replace.entrytable, entries.entrytable,
table->info.size) == 0)
continue;
}
struct xt_counters counters[XT_MAX_ENTRIES];
table->replace.num_counters = info.num_entries;
table->replace.counters = counters;
optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) +
table->replace.size;
if (setsockopt(fd, level, IPT_SO_SET_REPLACE, &table->replace, optlen))
exit(1);
}
close(fd);
}
static void checkpoint_arptables(void)
{
int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (unsigned i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) {
struct arpt_table_desc* table = &arpt_tables[i];
strcpy(table->info.name, table->name);
strcpy(table->replace.name, table->name);
socklen_t optlen = sizeof(table->info);
if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &table->info, &optlen)) {
switch (errno) {
case EPERM:
case ENOENT:
case ENOPROTOOPT:
continue;
}
exit(1);
}
if (table->info.size > sizeof(table->replace.entrytable))
exit(1);
if (table->info.num_entries > XT_MAX_ENTRIES)
exit(1);
struct arpt_get_entries entries;
memset(&entries, 0, sizeof(entries));
strcpy(entries.name, table->name);
entries.size = table->info.size;
optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size;
if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen))
exit(1);
table->replace.valid_hooks = table->info.valid_hooks;
table->replace.num_entries = table->info.num_entries;
table->replace.size = table->info.size;
memcpy(table->replace.hook_entry, table->info.hook_entry,
sizeof(table->replace.hook_entry));
memcpy(table->replace.underflow, table->info.underflow,
sizeof(table->replace.underflow));
memcpy(table->replace.entrytable, entries.entrytable, table->info.size);
}
close(fd);
}
static void reset_arptables()
{
int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (unsigned i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) {
struct arpt_table_desc* table = &arpt_tables[i];
if (table->info.valid_hooks == 0)
continue;
struct arpt_getinfo info;
memset(&info, 0, sizeof(info));
strcpy(info.name, table->name);
socklen_t optlen = sizeof(info);
if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &info, &optlen))
exit(1);
if (memcmp(&table->info, &info, sizeof(table->info)) == 0) {
struct arpt_get_entries entries;
memset(&entries, 0, sizeof(entries));
strcpy(entries.name, table->name);
entries.size = table->info.size;
optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size;
if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen))
exit(1);
if (memcmp(table->replace.entrytable, entries.entrytable,
table->info.size) == 0)
continue;
} else {
}
struct xt_counters counters[XT_MAX_ENTRIES];
table->replace.num_counters = info.num_entries;
table->replace.counters = counters;
optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) +
table->replace.size;
if (setsockopt(fd, SOL_IP, ARPT_SO_SET_REPLACE, &table->replace, optlen))
exit(1);
}
close(fd);
}
#define NF_BR_NUMHOOKS 6
#define EBT_TABLE_MAXNAMELEN 32
#define EBT_CHAIN_MAXNAMELEN 32
#define EBT_BASE_CTL 128
#define EBT_SO_SET_ENTRIES (EBT_BASE_CTL)
#define EBT_SO_GET_INFO (EBT_BASE_CTL)
#define EBT_SO_GET_ENTRIES (EBT_SO_GET_INFO + 1)
#define EBT_SO_GET_INIT_INFO (EBT_SO_GET_ENTRIES + 1)
#define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO + 1)
struct ebt_replace {
char name[EBT_TABLE_MAXNAMELEN];
unsigned int valid_hooks;
unsigned int nentries;
unsigned int entries_size;
struct ebt_entries* hook_entry[NF_BR_NUMHOOKS];
unsigned int num_counters;
struct ebt_counter* counters;
char* entries;
};
struct ebt_entries {
unsigned int distinguisher;
char name[EBT_CHAIN_MAXNAMELEN];
unsigned int counter_offset;
int policy;
unsigned int nentries;
char data[0] __attribute__((aligned(__alignof__(struct ebt_replace))));
};
struct ebt_table_desc {
const char* name;
struct ebt_replace replace;
char entrytable[XT_TABLE_SIZE];
};
static struct ebt_table_desc ebt_tables[] = {
{.name = "filter"},
{.name = "nat"},
{.name = "broute"},
};
static void checkpoint_ebtables(void)
{
int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (size_t i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) {
struct ebt_table_desc* table = &ebt_tables[i];
strcpy(table->replace.name, table->name);
socklen_t optlen = sizeof(table->replace);
if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_INFO, &table->replace,
&optlen)) {
switch (errno) {
case EPERM:
case ENOENT:
case ENOPROTOOPT:
continue;
}
exit(1);
}
if (table->replace.entries_size > sizeof(table->entrytable))
exit(1);
table->replace.num_counters = 0;
table->replace.entries = table->entrytable;
optlen = sizeof(table->replace) + table->replace.entries_size;
if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_ENTRIES, &table->replace,
&optlen))
exit(1);
}
close(fd);
}
static void reset_ebtables()
{
int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (fd == -1) {
switch (errno) {
case EAFNOSUPPORT:
case ENOPROTOOPT:
case ENOENT:
return;
}
exit(1);
}
for (unsigned i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) {
struct ebt_table_desc* table = &ebt_tables[i];
if (table->replace.valid_hooks == 0)
continue;
struct ebt_replace replace;
memset(&replace, 0, sizeof(replace));
strcpy(replace.name, table->name);
socklen_t optlen = sizeof(replace);
if (getsockopt(fd, SOL_IP, EBT_SO_GET_INFO, &replace, &optlen))
exit(1);
replace.num_counters = 0;
table->replace.entries = 0;
for (unsigned h = 0; h < NF_BR_NUMHOOKS; h++)
table->replace.hook_entry[h] = 0;
if (memcmp(&table->replace, &replace, sizeof(table->replace)) == 0) {
char entrytable[XT_TABLE_SIZE];
memset(&entrytable, 0, sizeof(entrytable));
replace.entries = entrytable;
optlen = sizeof(replace) + replace.entries_size;
if (getsockopt(fd, SOL_IP, EBT_SO_GET_ENTRIES, &replace, &optlen))
exit(1);
if (memcmp(table->entrytable, entrytable, replace.entries_size) == 0)
continue;
}
for (unsigned j = 0, h = 0; h < NF_BR_NUMHOOKS; h++) {
if (table->replace.valid_hooks & (1 << h)) {
table->replace.hook_entry[h] =
(struct ebt_entries*)table->entrytable + j;
j++;
}
}
table->replace.entries = table->entrytable;
optlen = sizeof(table->replace) + table->replace.entries_size;
if (setsockopt(fd, SOL_IP, EBT_SO_SET_ENTRIES, &table->replace, optlen))
exit(1);
}
close(fd);
}
static void checkpoint_net_namespace(void)
{
checkpoint_ebtables();
checkpoint_arptables();
checkpoint_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]),
AF_INET, SOL_IP);
checkpoint_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]),
AF_INET6, SOL_IPV6);
}
static void reset_net_namespace(void)
{
reset_ebtables();
reset_arptables();
reset_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]),
AF_INET, SOL_IP);
reset_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]),
AF_INET6, SOL_IPV6);
}
static void mount_cgroups(const char* dir, const char** controllers, int count)
{
if (mkdir(dir, 0777)) {
return;
}
char enabled[128] = {0};
int i = 0;
for (; i < count; i++) {
if (mount("none", dir, "cgroup", 0, controllers[i])) {
continue;
}
umount(dir);
strcat(enabled, ",");
strcat(enabled, controllers[i]);
}
if (enabled[0] == 0) {
if (rmdir(dir) && errno != EBUSY)
exit(1);
return;
}
if (mount("none", dir, "cgroup", 0, enabled + 1)) {
if (rmdir(dir) && errno != EBUSY)
exit(1);
}
if (chmod(dir, 0777)) {
}
}
static void mount_cgroups2(const char** controllers, int count)
{
if (mkdir("/syzcgroup/unified", 0777)) {
return;
}
if (mount("none", "/syzcgroup/unified", "cgroup2", 0, NULL)) {
if (rmdir("/syzcgroup/unified") && errno != EBUSY)
exit(1);
return;
}
if (chmod("/syzcgroup/unified", 0777)) {
}
int control = open("/syzcgroup/unified/cgroup.subtree_control", O_WRONLY);
if (control == -1)
return;
int i;
for (i = 0; i < count; i++)
if (write(control, controllers[i], strlen(controllers[i])) < 0) {
}
close(control);
}
static void setup_cgroups()
{
const char* unified_controllers[] = {"+cpu", "+io", "+pids"};
const char* net_controllers[] = {"net", "net_prio", "devices", "blkio",
"freezer"};
const char* cpu_controllers[] = {"cpuset", "cpuacct", "hugetlb", "rlimit",
"memory"};
if (mkdir("/syzcgroup", 0777)) {
return;
}
mount_cgroups2(unified_controllers,
sizeof(unified_controllers) / sizeof(unified_controllers[0]));
mount_cgroups("/syzcgroup/net", net_controllers,
sizeof(net_controllers) / sizeof(net_controllers[0]));
mount_cgroups("/syzcgroup/cpu", cpu_controllers,
sizeof(cpu_controllers) / sizeof(cpu_controllers[0]));
write_file("/syzcgroup/cpu/cgroup.clone_children", "1");
write_file("/syzcgroup/cpu/cpuset.memory_pressure_enabled", "1");
}
static void setup_cgroups_loop()
{
int pid = getpid();
char file[128];
char cgroupdir[64];
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid);
if (mkdir(cgroupdir, 0777)) {
}
snprintf(file, sizeof(file), "%s/pids.max", cgroupdir);
write_file(file, "32");
snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
write_file(file, "%d", pid);
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid);
if (mkdir(cgroupdir, 0777)) {
}
snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
write_file(file, "%d", pid);
snprintf(file, sizeof(file), "%s/memory.soft_limit_in_bytes", cgroupdir);
write_file(file, "%d", 299 << 20);
snprintf(file, sizeof(file), "%s/memory.limit_in_bytes", cgroupdir);
write_file(file, "%d", 300 << 20);
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid);
if (mkdir(cgroupdir, 0777)) {
}
snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir);
write_file(file, "%d", pid);
}
static void setup_cgroups_test()
{
char cgroupdir[64];
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid);
if (symlink(cgroupdir, "./cgroup")) {
}
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid);
if (symlink(cgroupdir, "./cgroup.cpu")) {
}
snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid);
if (symlink(cgroupdir, "./cgroup.net")) {
}
}
static void initialize_cgroups()
{
if (mkdir("./syz-tmp/newroot/syzcgroup", 0700))
exit(1);
if (mkdir("./syz-tmp/newroot/syzcgroup/unified", 0700))
exit(1);
if (mkdir("./syz-tmp/newroot/syzcgroup/cpu", 0700))
exit(1);
if (mkdir("./syz-tmp/newroot/syzcgroup/net", 0700))
exit(1);
unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE;
if (mount("/syzcgroup/unified", "./syz-tmp/newroot/syzcgroup/unified", NULL,
bind_mount_flags, NULL)) {
}
if (mount("/syzcgroup/cpu", "./syz-tmp/newroot/syzcgroup/cpu", NULL,
bind_mount_flags, NULL)) {
}
if (mount("/syzcgroup/net", "./syz-tmp/newroot/syzcgroup/net", NULL,
bind_mount_flags, NULL)) {
}
}
static void setup_binderfs();
static void setup_fusectl();
static void sandbox_common_mount_tmpfs(void)
{
write_file("/proc/sys/fs/mount-max", "100000");
if (mkdir("./syz-tmp", 0777))
exit(1);
if (mount("", "./syz-tmp", "tmpfs", 0, NULL))
exit(1);
if (mkdir("./syz-tmp/newroot", 0777))
exit(1);
if (mkdir("./syz-tmp/newroot/dev", 0700))
exit(1);
unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE;
if (mount("/dev", "./syz-tmp/newroot/dev", NULL, bind_mount_flags, NULL))
exit(1);
if (mkdir("./syz-tmp/newroot/proc", 0700))
exit(1);
if (mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL))
exit(1);
if (mkdir("./syz-tmp/newroot/selinux", 0700))
exit(1);
const char* selinux_path = "./syz-tmp/newroot/selinux";
if (mount("/selinux", selinux_path, NULL, bind_mount_flags, NULL)) {
if (errno != ENOENT)
exit(1);
if (mount("/sys/fs/selinux", selinux_path, NULL, bind_mount_flags, NULL) &&
errno != ENOENT)
exit(1);
}
if (mkdir("./syz-tmp/newroot/sys", 0700))
exit(1);
if (mount("/sys", "./syz-tmp/newroot/sys", 0, bind_mount_flags, NULL))
exit(1);
if (mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL,
bind_mount_flags, NULL) &&
errno != ENOENT)
exit(1);
if (mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL,
bind_mount_flags, NULL) &&
errno != ENOENT)
exit(1);
if (mount("/proc/sys/fs/binfmt_misc",
"./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, bind_mount_flags,
NULL) &&
errno != ENOENT)
exit(1);
initialize_cgroups();
if (mkdir("./syz-tmp/pivot", 0777))
exit(1);
if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) {
if (chdir("./syz-tmp"))
exit(1);
} else {
if (chdir("/"))
exit(1);
if (umount2("./pivot", MNT_DETACH))
exit(1);
}
if (chroot("./newroot"))
exit(1);
if (chdir("/"))
exit(1);
setup_binderfs();
setup_fusectl();
}
static void setup_fusectl()
{
if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
}
}
static void setup_binderfs()
{
if (mkdir("/dev/binderfs", 0777)) {
}
if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
}
}
static void loop();
static void sandbox_common()
{
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
if (getppid() == 1)
exit(1);
struct rlimit rlim;
rlim.rlim_cur = rlim.rlim_max = (200 << 20);
setrlimit(RLIMIT_AS, &rlim);
rlim.rlim_cur = rlim.rlim_max = 32 << 20;
setrlimit(RLIMIT_MEMLOCK, &rlim);
rlim.rlim_cur = rlim.rlim_max = 136 << 20;
setrlimit(RLIMIT_FSIZE, &rlim);
rlim.rlim_cur = rlim.rlim_max = 1 << 20;
setrlimit(RLIMIT_STACK, &rlim);
rlim.rlim_cur = rlim.rlim_max = 128 << 20;
setrlimit(RLIMIT_CORE, &rlim);
rlim.rlim_cur = rlim.rlim_max = 256;
setrlimit(RLIMIT_NOFILE, &rlim);
if (unshare(CLONE_NEWNS)) {
}
if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
}
if (unshare(CLONE_NEWIPC)) {
}
if (unshare(0x02000000)) {
}
if (unshare(CLONE_NEWUTS)) {
}
if (unshare(CLONE_SYSVSEM)) {
}
typedef struct {
const char* name;
const char* value;
} sysctl_t;
static const sysctl_t sysctls[] = {
{"/proc/sys/kernel/shmmax", "16777216"},
{"/proc/sys/kernel/shmall", "536870912"},
{"/proc/sys/kernel/shmmni", "1024"},
{"/proc/sys/kernel/msgmax", "8192"},
{"/proc/sys/kernel/msgmni", "1024"},
{"/proc/sys/kernel/msgmnb", "1024"},
{"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
};
unsigned i;
for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
write_file(sysctls[i].name, sysctls[i].value);
}
static int wait_for_loop(int pid)
{
if (pid < 0)
exit(1);
int status = 0;
while (waitpid(-1, &status, __WALL) != pid) {
}
return WEXITSTATUS(status);
}
static void drop_caps(void)
{
struct __user_cap_header_struct cap_hdr = {};
struct __user_cap_data_struct cap_data[2] = {};
cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
cap_hdr.pid = getpid();
if (syscall(SYS_capget, &cap_hdr, &cap_data))
exit(1);
const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
cap_data[0].effective &= ~drop;
cap_data[0].permitted &= ~drop;
cap_data[0].inheritable &= ~drop;
if (syscall(SYS_capset, &cap_hdr, &cap_data))
exit(1);
}
static int do_sandbox_none(void)
{
if (unshare(CLONE_NEWPID)) {
}
int pid = fork();
if (pid != 0)
return wait_for_loop(pid);
sandbox_common();
drop_caps();
if (unshare(CLONE_NEWNET)) {
}
write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535");
initialize_tun();
sandbox_common_mount_tmpfs();
loop();
exit(1);
}
#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 setup_loop()
{
setup_cgroups_loop();
checkpoint_net_namespace();
}
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);
}
reset_net_namespace();
}
static void setup_test()
{
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
setpgrp();
setup_cgroups_test();
write_file("/proc/self/oom_score_adj", "1000");
flush_tun();
if (symlink("/dev/binderfs", "./binderfs")) {
}
}
static void close_fds()
{
for (int fd = 3; fd < MAX_FDS; fd++)
close(fd);
}
static const char* setup_binfmt_misc()
{
if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0) &&
errno != EBUSY) {
return NULL;
}
if (!write_file("/proc/sys/fs/binfmt_misc/register",
":syz0:M:0:\x01::./file0:") ||
!write_file("/proc/sys/fs/binfmt_misc/register",
":syz1:M:1:\x02::./file0:POC"))
return "write(/proc/sys/fs/binfmt_misc/register) failed";
return NULL;
}
static const char* setup_usb()
{
if (chmod("/dev/raw-gadget", 0666))
return "failed to chmod /dev/raw-gadget";
return NULL;
}
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"},
{"/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) + (call == 7 ? 4000 : 0));
break;
}
}
for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
sleep_ms(1);
close_fds();
}
static void execute_one(void);
#define WAIT_FLAGS __WALL
static void loop(void)
{
setup_loop();
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[1] = {0xffffffffffffffff};
void execute_call(int call)
{
intptr_t res = 0;
switch (call) {
case 0:
NONFAILING(memcpy((void*)0x20000040, "ext4\000", 5));
NONFAILING(memcpy((void*)0x200001c0, "./file2\000", 8));
NONFAILING(memcpy((void*)0x20000200, "nogrpid", 7));
NONFAILING(*(uint8_t*)0x20000207 = 0x2c);
NONFAILING(memcpy((void*)0x20000208, "resuid", 6));
NONFAILING(*(uint8_t*)0x2000020e = 0x3d);
NONFAILING(sprintf((char*)0x2000020f, "0x%016llx", (long long)0xee01));
NONFAILING(*(uint8_t*)0x20000221 = 0x2c);
NONFAILING(memcpy((void*)0x20000222, "debug_want_extra_isize", 22));
NONFAILING(*(uint8_t*)0x20000238 = 0x3d);
NONFAILING(sprintf((char*)0x20000239, "0x%016llx", (long long)0x68));
NONFAILING(*(uint8_t*)0x2000024b = 0x2c);
NONFAILING(memcpy((void*)0x2000024c, "debug", 5));
NONFAILING(*(uint8_t*)0x20000251 = 0x2c);
NONFAILING(memcpy((void*)0x20000252, "nombcache", 9));
NONFAILING(*(uint8_t*)0x2000025b = 0x2c);
NONFAILING(memcpy((void*)0x2000025c, "quota", 5));
NONFAILING(*(uint8_t*)0x20000261 = 0x2c);
NONFAILING(*(uint8_t*)0x20000262 = 0);
NONFAILING(memcpy(
(void*)0x20000940,
"\x78\x9c\xec\xdb\xcf\x6b\x1c\x55\x1c\x00\xf0\xef\xcc\x26\xad\xfd\x65"
"\x62\xa9\x3f\x9a\x56\x8d\x56\x31\xf8\x23\x69\xd2\x5a\x7b\xf0\xa2\x28"
"\x78\x50\x10\xf4\x50\x8f\x31\x49\x4b\xec\xb6\x91\x26\x82\x2d\x41\xa3"
"\x48\x3d\x4a\xc1\xbb\x78\x14\xfc\x0b\x3c\xe9\x45\xd4\x93\xe0\x55\xef"
"\x52\x28\x92\x4b\xab\xa7\x95\xd9\x9d\x49\x76\x37\xbb\x69\x92\x6e\xb2"
"\xd5\xfd\x7c\x60\x92\xf7\x66\xde\xf2\xde\x77\x67\xde\xee\x7b\xf3\x76"
"\x02\xe8\x59\xc3\xd9\x9f\x24\x62\x7f\x44\xfc\x1e\x11\x03\xb5\x6c\x63"
"\x81\xe1\xda\xbf\x5b\xcb\x8b\x53\x7f\x2f\x2f\x4e\x25\x51\xa9\xbc\xf5"
"\x57\x52\x2d\x77\x73\x79\x71\xaa\x28\x5a\xbc\x6e\x5f\x91\xe9\x8b\x48"
"\x3f\x4b\xe2\x48\x8b\x7a\xe7\x2f\x5f\x39\x3f\x59\x2e\xcf\x5c\xca\xf3"
"\x63\x0b\x17\xde\x1f\x9b\xbf\x7c\xe5\xb9\xd9\x0b\x93\xe7\x66\xce\xcd"
"\x5c\x9c\x38\x7d\xfa\xe4\x89\xf1\x17\x4e\x4d\x3c\xdf\x91\x38\xb3\xb8"
"\x6e\x0e\x7d\x34\x77\xf4\xf0\x6b\xef\x5c\x7b\x63\xea\xcc\xb5\x77\x7f"
"\xfe\x36\x29\xe2\x6f\x8a\xa3\x43\x86\xd7\x3b\xf8\x64\xa5\xd2\xe1\xea"
"\xba\xeb\x40\x5d\x3a\xe9\xeb\x62\x43\xd8\x94\x52\xad\x9b\x46\x7f\xb5"
"\xff\x0f\x44\x29\x56\x4f\xde\x40\xbc\xfa\x69\x57\x1b\x07\x6c\xab\x4a"
"\xa5\x52\x79\xa0\xfd\xe1\xa5\x0a\xf0\x3f\x96\x44\xb7\x5b\x00\x74\x47"
"\xf1\x45\x9f\xcd\x7f\x8b\x6d\x87\x86\x1e\x77\x85\x1b\x2f\xd5\x26\x40"
"\x59\xdc\xb7\xf2\xad\x76\xa4\x2f\xd2\xbc\x4c\x7f\xd3\xfc\xb6\x93\x86"
"\x23\xe2\xcc\xd2\x3f\x5f\x65\x5b\x6c\xcf\x7d\x08\x00\x80\x06\xdf\x67"
"\xe3\x9f\x67\x5b\x8d\xff\xd2\xa8\xbf\x2f\x74\x6f\xbe\x86\x32\x18\x11"
"\xf7\x45\xc4\xc1\x88\x38\x15\x11\x87\x22\xe2\xfe\x88\x6a\xd9\x07\x23"
"\xe2\xa1\x4d\xd6\xdf\xbc\x48\xb2\x76\xfc\x93\x5e\xdf\x52\x60\x1b\x94"
"\x8d\xff\x5e\xcc\xd7\xb6\x1a\xc7\x7f\xc5\xe8\x2f\x06\x4b\x79\xee\x40"
"\x35\xfe\xfe\xe4\xec\x6c\x79\xe6\x78\xfe\x9e\x8c\x44\xff\xee\x2c\x3f"
"\xbe\x4e\x1d\x3f\xbc\xf2\xdb\x17\xed\x8e\xd5\x8f\xff\xb2\x2d\xab\xbf"
"\x18\x0b\xe6\xed\xb8\xde\xb7\xbb\xf1\x35\xd3\x93\x0b\x93\x77\x12\x73"
"\xbd\x1b\x9f\x44\x0c\xf5\xb5\x8a\x3f\x59\x59\x09\x48\x22\xe2\x70\x44"
"\x0c\x6d\xb1\x8e\xd9\xa7\xbf\x39\xda\xee\xd8\xed\xe3\x5f\x47\x07\xd6"
"\x99\x2a\x5f\x47\x3c\x55\x3b\xff\x4b\xd1\x14\x7f\x21\x59\x7f\x7d\x72"
"\xec\x9e\x28\xcf\x1c\x1f\x2b\xae\x8a\xb5\x7e\xf9\xf5\xea\x9b\xed\xea"
"\xbf\xa3\xf8\x3b\x20\x3b\xff\x7b\x5b\x5e\xff\x2b\xf1\x0f\x26\xf5\xeb"
"\xb5\xf3\x9b\xaf\xe3\xea\x1f\x9f\xb7\x9d\xd3\x6c\xf5\xfa\xdf\x95\xbc"
"\xdd\xb0\xef\xc3\xc9\x85\x85\x4b\xe3\x11\xbb\x92\xd7\x6b\x8d\xae\xdf"
"\x3f\xd1\x54\x6e\x62\xb5\x7c\x16\xff\xc8\xb1\xd6\xfd\xff\x60\xac\xbe"
"\x13\x47\x22\x22\xbb\x88\x1f\x8e\x88\x47\x22\xe2\xd1\xbc\xed\x8f\x45"
"\xc4\xe3\x11\x71\x6c\x9d\xf8\x7f\x7a\xf9\x89\xf7\xb6\x1e\xff\xf6\xca"
"\xe2\x9f\xde\xd4\xf9\x5f\x4d\xec\x8a\xe6\x3d\xad\x13\xa5\xf3\x3f\x7e"
"\xd7\x50\xe9\xe0\x66\xe2\xcf\xce\xff\xc9\x6a\x6a\x24\xdf\xb3\x91\xcf"
"\xbf\x8d\xb4\x6b\x6b\x57\x33\x00\x00\x00\xfc\xf7\xa4\x11\xb1\x3f\x92"
"\x74\x74\x25\x9d\xa6\xa3\xa3\xb5\xdf\xf0\x1f\x8a\xbd\x69\x79\x6e\x7e"
"\xe1\x99\xb3\x73\x1f\x5c\x9c\xae\x3d\x23\x30\x18\xfd\x69\x71\xa7\x6b"
"\xa0\xee\x7e\xe8\x78\x3e\xad\x2f\xf2\x13\x4d\xf9\x13\xf9\x7d\xe3\x2f"
"\x4b\x7b\xaa\xf9\xd1\xa9\xb9\xf2\x74\xb7\x83\x87\x1e\xb7\xaf\x4d\xff"
"\xcf\xfc\x59\xea\x76\xeb\x80\x6d\xe7\x79\x2d\xe8\x5d\xfa\x3f\xf4\x2e"
"\xfd\x1f\x7a\x97\xfe\x0f\xbd\xab\x45\xff\xdf\xd3\x8d\x76\x00\x3b\xaf"
"\xd5\xf7\xff\xc7\x5d\x68\x07\xb0\xf3\x9a\xfa\xbf\x65\x3f\xe8\x21\xe6"
"\xff\xd0\xbb\xf4\x7f\xe8\x5d\xfa\x3f\xf4\xa4\xf9\x3d\x71\xfb\x87\xe4"
"\x25\x24\xd6\x24\x22\xbd\x2b\x9a\x21\xb1\x4d\x89\x6e\x7f\x32\x01\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x74\xc6\xbf\x01\x00\x00\xff\xff\x50\x38\xe6\xd5",
1071));
NONFAILING(syz_mount_image(/*fs=*/0x20000040, /*dir=*/0x200001c0,
/*flags=MS_NODEV|MS_NOATIME*/ 0x404,
/*opts=*/0x20000200, /*chdir=*/3, /*size=*/0x42f,
/*img=*/0x20000940));
break;
case 1:
NONFAILING(memcpy((void*)0x20000000, "./file0\000", 8));
syscall(__NR_chdir, /*dir=*/0x20000000ul);
break;
case 2:
NONFAILING(memcpy((void*)0x20000040, "./bus\000", 6));
syscall(__NR_creat, /*file=*/0x20000040ul, /*mode=*/0ul);
break;
case 3:
NONFAILING(memcpy((void*)0x20000040, "hugetlb.2MB.usage_in_bytes\000", 27));
syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000040ul,
/*flags=*/0x275a, /*mode=*/0);
break;
case 4:
NONFAILING(memcpy((void*)0x20000380, "/dev/loop", 9));
NONFAILING(*(uint8_t*)0x20000389 = 0x30 + procid * 1);
NONFAILING(*(uint8_t*)0x2000038a = 0);
NONFAILING(memcpy((void*)0x20000140, "./bus\000", 6));
syscall(__NR_mount, /*src=*/0x20000380ul, /*dst=*/0x20000140ul,
/*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul);
break;
case 5:
NONFAILING(memcpy((void*)0x200002c0, "./bus\000", 6));
res = syscall(__NR_open, /*file=*/0x200002c0ul,
/*flags=O_SYNC|O_DIRECT|O_RDWR*/ 0x105002ul, /*mode=*/0ul);
if (res != -1)
r[0] = res;
break;
case 6:
syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x800000ul,
/*prot=PROT_WRITE*/ 2ul,
/*flags=MAP_STACK|MAP_POPULATE|MAP_FIXED|MAP_SHARED*/ 0x28011ul,
/*fd=*/r[0], /*offset=*/0ul);
break;
case 7:
NONFAILING(memcpy((void*)0x20000040, "exfat\000", 6));
NONFAILING(memcpy((void*)0x20000180, "\351\037q\211Y\036\2223aK\000", 11));
NONFAILING(*(uint8_t*)0x200003c0 = -1);
NONFAILING(*(uint8_t*)0x200003c1 = -1);
NONFAILING(sprintf((char*)0x200003c2, "0x%016llx", (long long)-1));
NONFAILING(*(uint64_t*)0x200003d4 = -1);
NONFAILING(*(uint8_t*)0x200003dc = -1);
NONFAILING(sprintf((char*)0x200003dd, "%020llu", (long long)0));
NONFAILING(memcpy(
(void*)0x20001b00,
"\x78\x9c\xec\xdc\x0b\xb8\x4e\xd5\xf6\x30\xf0\x31\xe6\x9c\x8b\x4d\xd2"
"\x9b\xe4\x3e\xc7\x1c\x8b\x37\x6d\x4c\x97\x24\xb9\x24\xc9\x25\x49\x92"
"\x23\x49\x6e\x09\x21\x49\x92\x90\xdc\x6f\x49\x48\x42\xee\x49\xee\x21"
"\xb9\x85\xe4\x7e\xbf\xe5\x9e\x24\x49\x92\x24\x24\x24\x99\xdf\xe3\x9c"
"\xce\xd7\x39\xa7\xf3\xff\xf7\xf5\xff\xf7\x7d\x9e\xef\xbf\xc7\xef\x79"
"\xd6\xf3\xce\xf1\xae\x77\xcc\x35\xe6\x1e\x7b\xef\x77\xad\xb5\x9f\x77"
"\x7f\xd3\x61\x48\xe5\xba\x55\x2a\xd4\x66\x66\xf8\x6f\xc1\xbf\x3d\x74"
"\x07\x80\x14\x00\xe8\x0f\x00\xd7\x01\x40\x04\x00\x25\xb2\x94\xc8\x72"
"\x65\x7f\x06\x8d\xdd\xff\x7b\x07\x11\x7f\xae\x87\xa6\x5f\xed\x0a\xc4"
"\xd5\x24\xfd\x4f\xdb\xa4\xff\x69\x9b\xf4\x3f\x6d\x93\xfe\xa7\x6d\xd2"
"\xff\xb4\x4d\xfa\x9f\xb6\x49\xff\xd3\x36\xe9\xbf\x10\x69\xd9\xf6\x19"
"\x39\xaf\x97\x2d\xed\x6e\x72\xff\x3f\x2d\x93\xf7\xff\xff\x41\x8e\x16"
"\x1e\xfb\xc5\xc6\xc2\x37\x76\xfc\x03\x29\xd2\xff\xb4\x4d\xfa\x9f\xb6"
"\x49\xff\xd3\x36\xe9\x7f\xda\x26\xfd\x4f\xdb\xa4\xff\x69\x9b\xf4\x3f"
"\x6d\x93\xfe\x0b\x91\x96\xfd\xd7\xef\x1d\xcb\xdf\x0e\xfe\x27\x6c\x57"
"\xfb\xfb\x4f\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10"
"\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08"
"\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84"
"\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42"
"\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21"
"\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10"
"\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08"
"\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x44\xda\x70\x21\xfc\xca"
"\x00\xc0\xdf\xc7\x57\xbb\x2e\x21\x84\x10\x42\x08\x21\x84\x10\x42\xfc"
"\x79\x42\xfa\xab\x5d\x81\x10\x42\x08\x21\x84\x10\x42\x08\x21\xfe\xef"
"\x43\x50\xa0\xc1\x40\x04\xe9\x20\x3d\xa4\x40\x06\xc8\x08\xd7\x40\x26"
"\xb8\x16\x32\xc3\x75\x90\x80\xeb\x21\x0b\xdc\x00\x59\xe1\x46\xc8\x06"
"\xd9\x21\x07\xe4\x84\x5c\x90\x1b\xf2\x80\x05\x02\x07\x0c\x31\xe4\x85"
"\x7c\x90\x84\x9b\x20\x3f\xdc\x0c\xa9\x50\x00\x0a\x42\x21\xf0\x50\x18"
"\x8a\x40\x51\x28\x06\xb7\x40\x71\xb8\x15\x4a\xc0\x6d\x50\x12\x6e\x87"
"\x52\x50\x1a\xca\x40\x59\xb8\x03\xca\xc1\x9d\x50\x1e\xee\x82\x0a\x70"
"\x37\x54\x84\x4a\x50\x19\xaa\xc0\x3d\x50\x15\xee\x85\x6a\x70\x1f\x54"
"\x87\xfb\xa1\x06\x3c\x00\x35\xe1\x41\xa8\x05\x7f\x81\xda\xf0\x10\xd4"
"\x81\x87\xa1\x2e\x3c\x02\xf5\xe0\x51\xa8\x0f\x0d\xa0\x21\x34\x82\xc6"
"\xff\xa5\xfc\x17\xa0\x0b\xbc\x08\x5d\xa1\x1b\x74\x87\x1e\xd0\x13\x7a"
"\x41\x6f\xe8\x03\x7d\xa1\x1f\xf4\x87\x97\x60\x00\xbc\x0c\x03\xe1\x15"
"\x18\x04\x83\x61\x08\xbc\x0a\x43\xe1\x35\x18\x06\xaf\xc3\x70\x18\x01"
"\x23\xe1\x0d\x18\x05\xa3\x61\x0c\x8c\x85\x71\x30\x1e\x26\xc0\x9b\x30"
"\x11\xde\x82\x49\xf0\x36\x4c\x86\x29\x30\x15\xa6\xc1\x74\x98\x01\x33"
"\xe1\x1d\x98\x05\xb3\x61\x0e\xbc\x0b\x73\xe1\x3d\x98\x07\xf3\x61\x01"
"\x2c\x84\x45\xf0\x3e\x2c\x86\x25\xb0\x14\x3e\x80\x65\xf0\x21\x2c\x87"
"\x15\xb0\x12\x56\xc1\x6a\x58\x03\x6b\x61\x1d\xac\x87\x0d\xb0\x11\x36"
"\xc1\x66\xd8\x02\x5b\x61\x1b\x6c\x87\x8f\x60\x07\xec\x84\x5d\xb0\x1b"
"\xf6\xc0\x5e\xd8\x07\x1f\xc3\x7e\xf8\x04\x0e\xc0\xa7\x70\x10\x3e\xfb"
"\x83\xf9\xe7\xff\x25\xbf\x23\x02\x02\x2a\x54\x68\xd0\x60\x3a\x4c\x87"
"\x29\x98\x82\x19\x31\x23\x66\xc2\x4c\x98\x19\x33\x63\x02\x13\x98\x05"
"\xb3\x60\x56\xcc\x8a\xd9\x30\x1b\xe6\xc0\x1c\x98\x0b\x73\x61\x1e\xcc"
"\x83\x84\x84\x8c\x8c\x79\x31\x2f\x26\x31\x89\xf9\x31\x3f\xa6\x62\x2a"
"\x16\xc4\x82\xe8\xd1\x63\x11\x2c\x82\xc5\xf0\x16\x2c\x8e\xc5\xb1\x04"
"\x96\xc0\x92\x58\x12\x4b\x61\x69\x2c\x8d\x65\xb1\x2c\x96\xc3\x72\x58"
"\x1e\xcb\x63\x05\xac\x80\x15\xb1\x22\x56\xc6\xca\x78\x0f\xde\x83\xf7"
"\x62\x35\xac\x86\xd5\xb1\x3a\xd6\xc0\x1a\x58\x13\x6b\x62\x2d\xac\x85"
"\xb5\xb1\x36\xd6\xc1\x3a\x58\x17\xeb\x62\x3d\xac\x87\xf5\xb1\x3e\x36"
"\xc4\x86\xd8\x18\x1b\x63\x13\x6c\x82\x4d\xb1\x29\x36\xc7\xe6\xd8\x02"
"\x5b\x60\x2b\x6c\x85\xad\xb1\x35\xb6\xc1\x36\xd8\x16\xdb\x62\x3b\x6c"
"\x87\xed\xb1\x3d\x76\xc0\x0e\xd8\x11\x3b\x61\x27\x7c\x01\x5f\xc0\x17"
"\xf1\x45\xec\x86\x15\x55\x0f\xec\x89\x3d\xb1\x37\xf6\xc6\xbe\xd8\x0f"
"\xfb\xe1\x4b\x38\x00\x5f\xc6\x97\xf1\x15\x1c\x84\x83\x71\x08\xbe\x8a"
"\xaf\xe2\x6b\x38\x0c\xcf\xe1\x70\x1c\x81\x23\x71\x24\x96\x53\xa3\x71"
"\x0c\x8e\x45\x56\xe3\x71\x02\x4e\xc0\x89\x38\x11\x27\xe1\x24\x9c\x8c"
"\x53\x70\x0a\x4e\xc3\xe9\x38\x03\x67\xe2\x4c\x9c\x85\xb3\x71\x36\xbe"
"\x8b\x73\xf1\x3d\x7c\x0f\xe7\xe3\x7c\x5c\x88\x8b\x70\x11\x2e\xc6\x25"
"\xb8\x14\x97\xe2\x32\x3c\x8f\xcb\x71\x05\xae\xc4\x55\xb8\x1a\xd7\xe0"
"\x6a\x5c\x87\xeb\x71\x1d\x6e\xc4\x4d\xb8\x11\xb7\xe0\x16\xdc\x86\xdb"
"\xf0\x23\xfc\x08\x77\xe2\x4e\xdc\x8d\xbb\x71\x2f\x1a\x00\xfc\x18\x3f"
"\xc1\x4f\x70\x10\x1e\xc4\x83\x78\x08\x0f\xe1\x61\x3c\x8c\x47\xf0\x08"
"\x1e\xc5\xa3\x78\x0c\x8f\xe1\x71\x3c\x8e\x27\xf0\x04\x9e\xc4\x93\x78"
"\x0a\x4f\xe3\x19\x3c\x8d\x67\xf1\x2c\x9e\xc3\xf3\x78\x01\x2f\xe0\x45"
"\xbc\x88\x97\xf0\xb9\x5c\x5f\xd5\xd9\x5b\x60\xc3\x20\x50\x57\x18\x65"
"\x54\x3a\x95\x4e\xa5\xa8\x14\x95\x51\x65\x54\x99\x54\x26\x95\x59\x65"
"\x56\x09\x95\x50\x59\x54\x16\x95\x55\x65\x55\xd9\x54\x36\x95\x43\xe5"
"\x50\xb9\x54\x2e\x95\x47\xe5\x51\xa4\x48\xb1\x8a\x55\x5e\x95\x57\x25"
"\x55\x52\xe5\x57\xf9\x55\xaa\x4a\x55\x05\x55\x41\xe5\x95\x57\x45\x54"
"\x11\x55\x4c\x15\x53\xc5\x55\x71\x55\x42\xdd\xa6\x4a\xaa\xdb\x55\x29"
"\x55\x5a\x35\xf3\x65\x55\x59\x55\x4e\x35\xf7\xe5\xd5\x5d\xaa\x82\xaa"
"\xa0\x2a\xaa\x4a\xaa\xb2\xaa\xa2\xaa\xa8\xaa\xaa\xaa\xaa\xa6\xaa\xa9"
"\xea\xaa\xba\xaa\xa1\x6a\xa8\x9a\xea\x41\x55\x4b\xf5\xc0\xbe\xf8\x90"
"\xba\xd2\x99\xba\x6a\x30\xd6\x53\x43\xb0\xbe\x6a\xa0\x1a\xaa\x46\xea"
"\x35\x7c\x4c\x35\x51\xc3\xb0\xa9\x6a\xa6\x9a\xab\x27\xd4\x08\x1c\x8e"
"\xad\x54\x13\xdf\x5a\x3d\xa5\xda\xa8\x31\xd8\x56\x3d\xa3\xc6\xe2\xb3"
"\xaa\xbd\x1a\x8f\x1d\xd4\xf3\xaa\xa3\xea\xa4\x3a\xab\x17\x54\x17\xd5"
"\xd4\x77\x55\xdd\xd4\x64\xec\xa1\x7a\xaa\x69\xd8\x5b\xf5\x51\x7d\x55"
"\x3f\x35\x0b\x2b\xa9\x2b\x1d\xab\xac\x5e\x51\x83\xd4\x60\x35\x44\xbd"
"\xaa\x16\xe2\x6b\x6a\x98\x7a\x5d\x0d\x57\x23\xd4\x48\xf5\x86\x1a\xa5"
"\x46\xab\x31\x6a\xac\x1a\xa7\xc6\xab\x09\xea\x4d\x35\x51\xbd\xa5\x26"
"\xa9\xb7\xd5\x64\x35\x45\x4d\x55\xd3\xd4\x74\x35\x43\xcd\x54\xef\xa8"
"\x59\x6a\xb6\x9a\xa3\xde\x55\x73\xd5\x7b\x6a\x9e\x9a\xaf\x16\xa8\x85"
"\x6a\x91\x7a\x5f\x2d\x56\x4b\xd4\x52\xf5\x81\x5a\xa6\x3e\x54\xcb\xd5"
"\x0a\xb5\x52\xad\x52\xab\xd5\x1a\xb5\x56\xad\x53\xeb\xd5\x06\xb5\x51"
"\x6d\x52\x9b\xd5\x16\xb5\x55\x6d\x53\xdb\xd5\x47\x6a\x87\xda\xa9\x76"
"\xa9\xdd\x6a\x8f\xda\xab\xf6\xa9\x8f\xd5\x7e\xf5\x89\x3a\xa0\x3e\x55"
"\x07\xd5\x67\xea\x90\xfa\x5c\x1d\x56\x5f\xa8\x23\xea\x4b\x75\x54\x7d"
"\xa5\x8e\xa9\xaf\xd5\x71\xf5\x8d\x3a\xa1\xbe\x55\x27\xd5\x77\xea\x94"
"\x3a\xad\xce\xa8\xef\xd5\x59\xf5\x83\x3a\xa7\xce\xab\x0b\xea\x47\x75"
"\x51\xfd\xa4\x2e\xa9\x9f\xd5\x65\x15\x14\x68\xd4\x4a\x6b\x6d\x74\xa4"
"\xd3\xe9\xf4\x3a\x45\x67\xd0\x19\xf5\x35\x3a\x93\xbe\x56\x67\xd6\xd7"
"\xe9\x84\xbe\x5e\x67\xd1\x37\xe8\xac\xfa\x46\x9d\x4d\x67\xd7\x39\x74"
"\x4e\x9d\x4b\xe7\xd6\x79\xb4\xd5\xa4\x9d\x66\x1d\xeb\xbc\x3a\x9f\x4e"
"\xea\x9b\x74\x7e\x7d\xb3\x4e\xd5\x05\x74\x41\x5d\x48\x7b\x5d\x58\x17"
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"\x9c\x37\xce\x17\x27\xe3\x9b\xe2\xfc\xf1\xcd\x71\x6a\x5c\x20\x2e\x18"
"\x17\x8a\x7d\x5c\x38\x2e\x12\x17\x8d\x8b\xc5\xb7\xc4\xc5\xe3\x5b\xe3"
"\x12\xf1\x6d\x71\xc9\xf8\xf6\xb8\x54\x5c\x3a\x7e\xe4\xfe\xb2\xf1\x1d"
"\x71\xb9\xf8\xce\xb8\x7c\x7c\x57\x5c\x21\xbe\x3b\xae\x18\x57\x8a\x2b"
"\xc7\x55\xe2\x7b\xe2\xaa\xf1\xbd\x71\xb5\xf8\xbe\xb8\x7a\x7c\x7f\x5c"
"\x3c\x7e\x20\xae\x19\x3f\x18\xc3\x2f\x9f\x57\xa9\x13\x3f\x1c\xd7\x8d"
"\x1f\x89\xeb\xc5\x8f\xc6\xf5\xe3\x06\x71\xc3\xb8\x51\xdc\x38\x7e\x2c"
"\x6e\x12\x3f\x1e\x37\x8d\x9b\xc5\xcd\xe3\x27\xe2\x16\x71\xcb\xb8\x55"
"\xfc\x64\xdc\x3a\x7e\x2a\x6e\x13\x3f\xfd\xbb\xfb\xbb\xc7\x3d\xe2\x9e"
"\x71\xaf\xb8\x57\x1c\xc2\x7d\x7a\x41\x72\x61\x72\x51\xf2\xfd\xe4\xe2"
"\xe4\x92\xe4\xd2\xe4\x07\xc9\x65\xc9\x0f\x93\xcb\x93\x2b\x92\x2b\x93"
"\xab\x92\xab\x93\x6b\x92\x6b\x93\xeb\x92\xeb\x93\x1b\x92\x1b\x93\x9b"
"\x92\x9b\x93\x5b\x92\x5b\x93\xdb\x92\x21\x54\x49\x0f\x1e\xbd\xf2\xda"
"\x1b\x1f\xf9\x74\x3e\xbd\x4f\xf1\x19\x7c\x46\x7f\x8d\xcf\xe4\xaf\xf5"
"\x99\xfd\x75\x3e\xe1\xaf\xf7\x59\xfc\x0d\x3e\xab\xbf\xd1\x67\xf3\xd9"
"\x7d\x0e\x9f\xd3\xe7\xf2\xb9\x7d\x1e\x6f\x3d\x79\xe7\xd9\xc7\x3e\xaf"
"\xcf\xe7\x93\xfe\x26\x9f\xdf\xdf\xec\x53\x7d\x01\x5f\xd0\x17\xf2\xde"
"\x17\xf6\x45\x7c\x23\xdf\xd8\x37\xf6\x4d\xfc\xe3\xbe\xa9\x6f\xe6\x9b"
"\xfb\x27\xfc\x13\xbe\xa5\x6f\xe9\x9f\xf4\x4f\xfa\xa7\x7c\x1b\xff\xb4"
"\x6f\xeb\x9f\xf1\xed\xfc\xb3\xbe\xbd\x7f\xce\x3f\xe7\x9f\xf7\x1d\x7d"
"\x27\xdf\xd9\xbf\xe0\xbb\xf8\x17\x7d\x57\xdf\xcd\x77\xf7\xdd\x7d\x4f"
"\xdf\xd3\xf7\xf6\xbd\x7d\x5f\xdf\xd7\xf7\xf7\xfd\xfd\x00\x3f\xc0\x0f"
"\xf4\x03\xfd\x20\x3f\xc8\x0f\xf1\x43\xfc\x50\x3f\xd4\x0f\xf3\xc3\xfc"
"\x70\x3f\xdc\x8f\xf4\x23\xfd\x28\x3f\xca\x8f\xf1\x63\xfc\x38\x3f\xce"
"\x4f\xf0\x13\xfc\x44\x3f\xd1\x4f\xf2\x93\x7c\x04\x00\x53\xfd\x54\x3f"
"\xdd\x4f\xf7\x33\xfd\x4c\x3f\xcb\xcf\xf2\x73\xfc\x1c\x3f\x37\x75\xae"
"\x9f\xe7\xe7\xf9\x05\x7e\x81\x5f\xe4\x17\xf9\xc5\x7e\xb1\x5f\xea\x97"
"\xfa\x65\x7e\x99\x5f\xee\x97\xfb\x95\x7e\xa5\x5f\xed\x57\xfb\xb5\x7e"
"\xad\x5f\xef\xd7\xfb\x8d\x7e\xa3\xdf\xec\x37\xfb\xad\x7e\xab\xdf\xee"
"\xb7\xfb\x1d\x7e\x87\xdf\xe5\x77\xf9\x3d\x7e\x8f\xdf\xe7\xf7\xf9\xfd"
"\x7e\xbf\x3f\xe0\x0f\xf8\x83\xfe\xa0\x3f\xe4\x0f\xf9\xc3\xfe\xb0\x3f"
"\xe2\xbf\xf4\x47\xfd\x57\xfe\x98\xff\xda\x1f\xf7\xdf\xf8\x13\xfe\x5b"
"\x7f\xd2\x7f\xe7\x4f\xf9\xd3\xfe\x8c\xff\xde\x9f\xf5\x3f\xf8\x73\xfe"
"\xbc\xbf\xe0\x7f\xf4\x17\xfd\x4f\xfe\x92\xff\xd9\x5f\xf6\xc1\x4f\x48"
"\xbc\x99\x98\x98\x78\x2b\x31\x29\xf1\x76\x62\x72\x62\x4a\x62\x6a\x62"
"\x5a\x62\x7a\x62\x46\x62\x66\xe2\x9d\xc4\xac\xc4\xec\xc4\x9c\xc4\xbb"
"\x89\xb9\x89\xf7\x12\xf3\x12\xf3\x13\x0b\x12\x0b\x13\x8b\x12\xef\x27"
"\x16\x27\x96\x24\x96\x26\x3e\x48\x2c\x4b\x7c\x98\x58\x9e\x58\x91\x58"
"\x99\x58\x95\x58\x9d\x58\x63\x20\xe4\xde\x11\x87\xbc\x21\x5f\x48\x86"
"\x9b\x42\xfe\x70\x73\x48\x0d\x05\x42\xc1\x50\x28\xf8\x50\x38\x14\x09"
"\x45\x43\xb1\x70\x4b\x28\x1e\x6e\x0d\x25\xc2\x6d\xa1\x64\xb8\x3d\x94"
"\x0a\xa5\x43\x99\xf0\x68\xa8\x1f\x1a\x84\x86\xa1\x51\x68\x1c\x1e\x0b"
"\x4d\xc2\xe3\xa1\x69\x68\x16\x9a\x87\x27\x42\x8b\xd0\x32\xb4\x0a\x4f"
"\x86\xd6\xe1\xa9\xd0\x26\x3c\x1d\xda\x86\x67\x42\xbb\xf0\x6c\x68\x1f"
"\x9e\x0b\x1d\xc2\xf3\xa1\x63\xe8\x14\x3a\x87\x17\x42\x97\xf0\x62\xe8"
"\x1a\xba\x85\xee\xa1\x47\xe8\x19\x7a\x85\xde\xa1\x4f\xe8\x1b\xfa\x85"
"\xfe\xe1\xa5\x30\x20\xbc\x1c\x06\x86\x57\xc2\xa0\x30\x38\x0c\x09\xaf"
"\x86\xa1\xe1\xb5\x30\x2c\xbc\x1e\x86\x87\x11\x61\x64\x78\x23\x8c\x0a"
"\xa3\xc3\x98\x30\x36\x8c\x0b\xe3\xc3\x84\xf0\x66\x98\x18\xde\x0a\x93"
"\xc2\xdb\x61\x72\x98\x12\xa6\x86\x69\x61\x7a\x98\x11\x66\x86\x77\xc2"
"\xac\x30\x3b\xcc\x09\xef\x86\xb9\xe1\xbd\x30\x2f\xcc\x0f\x0b\xc2\xc2"
"\xb0\x28\xbc\x1f\x16\x87\x25\x61\x69\xf8\x20\x2c\x0b\x1f\x86\xe5\x61"
"\x45\x58\x19\x56\x85\xd5\x61\x4d\x58\x1b\xd6\x85\xf5\x61\x43\xd8\x18"
"\x36\x85\xcd\x61\x4b\xd8\x1a\xb6\x85\xed\xe1\xa3\xb0\x23\xec\x0c\xbb"
"\xc2\xee\xb0\x27\xec\x0d\xfb\xc2\xc7\x61\x7f\xf8\x24\x1c\x08\x9f\x86"
"\x83\xe1\xb3\x70\x28\x7c\x1e\x0e\x87\x2f\xc2\x91\xf0\x65\x38\x1a\xbe"
"\x0a\xc7\xc2\xd7\xe1\x78\xf8\x26\x9c\x08\xdf\x86\x93\xe1\xbb\x70\x2a"
"\x9c\x0e\x67\xc2\xf7\xe1\x6c\xf8\x21\x9c\x0b\xe7\xc3\x85\xf0\x63\xb8"
"\x18\x7e\x0a\x97\xc2\xcf\xe1\xf2\x1f\xfc\xcc\x5a\xa5\x3f\xf3\x16\xba"
"\x10\x42\x08\x21\xc4\xff\x47\x7a\xfd\xce\xfe\x1e\xff\xe6\x39\x03\x00"
"\xea\x97\xf1\x4f\x21\x84\x6b\x77\xe6\x3c\xfa\x8f\xfb\x35\x00\x6c\xce"
"\xf6\xb7\x71\x1f\x95\xab\x45\x02\x00\x9e\xea\xd6\xe1\xa1\xbf\x6f\x15"
"\x2b\x76\xef\xde\xfd\x97\xd7\x2e\xd7\x10\xe5\x9b\x0f\x00\x89\x7f\x39"
"\xc0\x2f\xf1\x0a\x68\x0e\x2d\xa1\x35\x34\x83\x62\xff\xb6\xbe\x3e\xaa"
"\xd3\x45\xfe\x9d\xf9\x93\xb7\x01\x64\xfc\x87\x9c\x14\xf8\x35\xfe\x75"
"\xfe\xcf\xff\x83\xf9\x1f\x7b\x62\xe4\xe2\x92\xf1\x85\x2c\xff\xc9\xfc"
"\xf3\x01\x52\xf3\xfd\x9a\x73\xe5\x2a\xfc\xef\xf1\x0a\x68\x7e\x65\x35"
"\xd0\x0c\x8a\xff\x07\xf3\x67\x6f\xf2\x3b\xf5\x67\xf8\x62\x02\x40\xd3"
"\x7f\xc8\xc9\x04\x00\x4d\x33\xfc\x6b\xfd\x45\xe0\x71\x78\x1a\x5a\xff"
"\xd3\x2b\x85\x10\x42\x08\x21\x84\x10\x42\x88\xbf\xe9\xa3\xca\xb4\xfb"
"\xbd\xeb\xe7\x2b\xd7\xe7\xb9\xcc\xaf\x39\xe9\xe1\xd7\xf8\xf7\xae\xcf"
"\x85\x10\x42\x08\x21\x84\x10\x42\x08\x71\xf5\x3d\xdb\xa9\xf3\x93\x8f"
"\xb5\x6e\xdd\xac\x9d\x0c\x64\x20\x83\x34\x36\x68\xf9\x9f\xbc\xe6\x6a"
"\xff\x66\x12\x42\x08\x21\x84\x10\x42\xfc\xd9\x7e\x3d\xe9\xff\xf5\xb9"
"\x0c\x57\xb3\x20\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10"
"\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08"
"\x21\x84\x10\x42\x08\x21\x84\x10\x22\x0d\xfa\x7f\xf1\x9f\xc6\xae\xf6"
"\x1a\x85\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84"
"\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42"
"\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x88\xab"
"\xed\x7f\x05\x00\x00\xff\xff\x0f\x98\x37\x7d",
5383));
NONFAILING(syz_mount_image(
/*fs=*/0x20000040, /*dir=*/0x20000180,
/*flags=MS_I_VERSION|MS_POSIXACL|MS_RELATIME|MS_NOSUID|MS_NOEXEC*/
0xa1000a, /*opts=*/0x200003c0, /*chdir=*/0x21, /*size=*/0x1507,
/*img=*/0x20001b00));
break;
case 8:
NONFAILING(memcpy((void*)0x20000000, "./file0\000", 8));
syscall(__NR_mknod, /*file=*/0x20000000ul, /*mode=*/0ul,
/*dev=*/0x701 + procid * 2);
break;
}
}
int main(void)
{
syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
/*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-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=*/-1,
/*offset=*/0ul);
syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul,
/*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1,
/*offset=*/0ul);
setup_sysctl();
setup_cgroups();
const char* reason;
(void)reason;
if ((reason = setup_binfmt_misc()))
printf("the reproducer may not work as expected: binfmt_misc setup failed: "
"%s\n",
reason);
if ((reason = setup_usb()))
printf("the reproducer may not work as expected: USB injection setup "
"failed: %s\n",
reason);
install_segv_handler();
for (procid = 0; procid < 5; procid++) {
if (fork() == 0) {
use_temporary_dir();
do_sandbox_none();
}
}
sleep(1000000);
return 0;
}