On Wed, Jun 21, 2017 at 2:08 PM, Andrey Konovalov <andreyk...@google.com> wrote: > Hi, > > I've got the following error report while fuzzing the kernel with syzkaller. > > On commit 9705596d08ac87c18aee32cc97f2783b7d14624e (4.12-rc6+). > > It might be related to: > https://groups.google.com/forum/#!topic/syzkaller/ZJaqAiFLe3k > > I only have a reproducer in the form of a syzkaller program, attached > together with my .config.
I now have a C reproducer as well, attached. > > It can be executed as described here: > https://github.com/google/syzkaller/blob/master/docs/executing_syzkaller_programs.md > > With the following flags: > ./syz-execprog -repeat=0 -procs=8 -sandbox=namespace ./log > > Since I'm able to reproduce it, I can apply debug patches and test > with them if required. > > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access > general protection fault: 0000 [#1] SMP KASAN > Modules linked in: > CPU: 1 PID: 4499 Comm: syz-executor Not tainted 4.12.0-rc6+ #10 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 > task: ffff880068e88000 task.stack: ffff88005e0a0000 > RIP: 0010:rt6_uncached_list_flush_dev net/ipv6/route.c:167 > RIP: 0010:rt6_ifdown+0x3d4/0x910 net/ipv6/route.c:2824 > RSP: 0018:ffff88005e0a6e38 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900029a2000 > RDX: 0000000000002dce RSI: ffffffff83ea9ee8 RDI: ffff88006ca25444 > RBP: ffff88005e0a6f98 R08: 0000000000000001 R09: c9811a8e00000000 > R10: ffff880068e88810 R11: dffffc0000000000 R12: ffff88005e0ad518 > R13: ffff88005e0ad500 R14: ffff88006200b300 R15: dffffc0000000000 > FS: 00007f4ccaad9700(0000) GS:ffff88006cb00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000002000f000 CR3: 00000000672e8000 CR4: 00000000000006e0 > Call Trace: > addrconf_ifdown+0x1a8/0x1a30 net/ipv6/addrconf.c:3588 > addrconf_notify+0x1cf/0x2630 net/ipv6/addrconf.c:3512 > notifier_call_chain+0x14a/0x2e0 kernel/notifier.c:93 > __raw_notifier_call_chain kernel/notifier.c:394 > raw_notifier_call_chain+0x32/0x40 kernel/notifier.c:401 > call_netdevice_notifiers_info+0x56/0x90 net/core/dev.c:1650 > call_netdevice_notifiers net/core/dev.c:1666 > __dev_notify_flags+0x202/0x330 net/core/dev.c:6647 > dev_change_flags+0xfa/0x150 net/core/dev.c:6678 > dev_ifsioc+0x62f/0x9f0 net/core/dev_ioctl.c:254 > dev_ioctl+0x24e/0x1160 net/core/dev_ioctl.c:532 > sock_do_ioctl+0x99/0xb0 net/socket.c:913 > sock_ioctl+0x294/0x440 net/socket.c:1004 > vfs_ioctl fs/ioctl.c:45 > do_vfs_ioctl+0x1c4/0x1660 fs/ioctl.c:685 > SYSC_ioctl fs/ioctl.c:700 > SyS_ioctl+0x94/0xc0 fs/ioctl.c:691 > entry_SYSCALL_64_fastpath+0x1f/0xbe arch/x86/entry/entry_64.S:203 > RIP: 0033:0x446349 > RSP: 002b:00007f4ccaad8c08 EFLAGS: 00000282 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 0000000000003210 RCX: 0000000000446349 > RDX: 00000000208befe0 RSI: 0000000000008914 RDI: 0000000000000018 > RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000018 > R13: 0000000000003210 R14: 00000000006e42d0 R15: 0000000000008914 > Code: 49 8b 9d 58 01 00 00 4c 89 e0 48 c1 e8 03 42 80 3c 38 00 0f 85 > 6d 04 00 00 49 8b 45 18 48 89 85 f0 fe ff ff 48 89 d8 48 c1 e8 03 <42> > 80 3c 38 00 0f 85 5d 04 00 00 4c 3b 33 0f 84 d7 01 00 00 e8 > RIP: rt6_ifdown+0x3d4/0x910 RSP: ffff88005e0a6e38 > ---[ end trace f2e889448df70bb4 ]--- > Kernel panic - not syncing: Fatal exception in interrupt > Kernel Offset: disabled > ---[ end Kernel panic - not syncing: Fatal exception in interrupt
// autogenerated by syzkaller (http://github.com/google/syzkaller) #ifndef __NR_socket #define __NR_socket 41 #endif #ifndef __NR_ioctl #define __NR_ioctl 16 #endif #ifndef __NR_syz_emit_ethernet #define __NR_syz_emit_ethernet 1000006 #endif #ifndef __NR_connect #define __NR_connect 42 #endif #ifndef __NR_sendmmsg #define __NR_sendmmsg 307 #endif #ifndef __NR_mmap #define __NR_mmap 9 #endif #define _GNU_SOURCE #include <arpa/inet.h> #include <errno.h> #include <fcntl.h> #include <linux/capability.h> #include <linux/if.h> #include <linux/if_ether.h> #include <linux/if_tun.h> #include <linux/ip.h> #include <linux/tcp.h> #include <net/if_arp.h> #include <sched.h> #include <signal.h> #include <stdarg.h> #include <stdbool.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/stat.h> #include <sys/syscall.h> #include <sys/time.h> #include <sys/wait.h> #include <unistd.h> const int kFailStatus = 67; const int kRetryStatus = 69; __attribute__((noreturn)) static void doexit(int status) { volatile unsigned i; syscall(__NR_exit_group, status); for (i = 0;; i++) { } } __attribute__((noreturn)) static void fail(const char* msg, ...) { int e = errno; fflush(stdout); va_list args; va_start(args, msg); vfprintf(stderr, msg, args); va_end(args); fprintf(stderr, " (errno %d)\n", e); doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus); } #define BITMASK_LEN(type, bf_len) (type)((1ull << (bf_len)) - 1) #define BITMASK_LEN_OFF(type, bf_off, bf_len) \ (type)(BITMASK_LEN(type, (bf_len)) << (bf_off)) #define STORE_BY_BITMASK(type, addr, val, bf_off, bf_len) \ if ((bf_off) == 0 && (bf_len) == 0) { \ *(type*)(addr) = (type)(val); \ } else { \ type new_val = *(type*)(addr); \ new_val &= ~BITMASK_LEN_OFF(type, (bf_off), (bf_len)); \ new_val |= ((type)(val)&BITMASK_LEN(type, (bf_len))) << (bf_off); \ *(type*)(addr) = new_val; \ } static void vsnprintf_check(char* str, size_t size, const char* format, va_list args) { int rv; rv = vsnprintf(str, size, format, args); if (rv < 0) fail("tun: snprintf failed"); if ((size_t)rv >= size) fail("tun: string '%s...' doesn't fit into buffer", str); } static void snprintf_check(char* str, size_t size, const char* format, ...) { va_list args; va_start(args, format); vsnprintf_check(str, size, format, args); va_end(args); } #define COMMAND_MAX_LEN 128 static void execute_command(const char* format, ...) { va_list args; char command[COMMAND_MAX_LEN]; int rv; va_start(args, format); vsnprintf_check(command, sizeof(command), format, args); rv = system(command); if (rv != 0) fail("tun: command \"%s\" failed with code %d", &command[0], rv); va_end(args); } static int tunfd = -1; #define SYZ_TUN_MAX_PACKET_SIZE 1000 #define MAX_PIDS 32 #define ADDR_MAX_LEN 32 #define LOCAL_MAC "aa:aa:aa:aa:aa:%02hx" #define REMOTE_MAC "bb:bb:bb:bb:bb:%02hx" #define LOCAL_IPV4 "172.20.%d.170" #define REMOTE_IPV4 "172.20.%d.187" #define LOCAL_IPV6 "fe80::%02hxaa" #define REMOTE_IPV6 "fe80::%02hxbb" static void initialize_tun(uint64_t pid) { if (pid >= MAX_PIDS) fail("tun: no more than %d executors", MAX_PIDS); int id = pid; tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK); if (tunfd == -1) fail("tun: can't open /dev/net/tun"); char iface[IFNAMSIZ]; snprintf_check(iface, sizeof(iface), "syz%d", id); struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, iface, IFNAMSIZ); ifr.ifr_flags = IFF_TAP | IFF_NO_PI; if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) fail("tun: ioctl(TUNSETIFF) failed"); char local_mac[ADDR_MAX_LEN]; snprintf_check(local_mac, sizeof(local_mac), LOCAL_MAC, id); char remote_mac[ADDR_MAX_LEN]; snprintf_check(remote_mac, sizeof(remote_mac), REMOTE_MAC, id); char local_ipv4[ADDR_MAX_LEN]; snprintf_check(local_ipv4, sizeof(local_ipv4), LOCAL_IPV4, id); char remote_ipv4[ADDR_MAX_LEN]; snprintf_check(remote_ipv4, sizeof(remote_ipv4), REMOTE_IPV4, id); char local_ipv6[ADDR_MAX_LEN]; snprintf_check(local_ipv6, sizeof(local_ipv6), LOCAL_IPV6, id); char remote_ipv6[ADDR_MAX_LEN]; snprintf_check(remote_ipv6, sizeof(remote_ipv6), REMOTE_IPV6, id); execute_command("sysctl -w net.ipv6.conf.%s.accept_dad=0", iface); execute_command("sysctl -w net.ipv6.conf.%s.router_solicitations=0", iface); execute_command("ip link set dev %s address %s", iface, local_mac); execute_command("ip addr add %s/24 dev %s", local_ipv4, iface); execute_command("ip -6 addr add %s/120 dev %s", local_ipv6, iface); execute_command("ip neigh add %s lladdr %s dev %s nud permanent", remote_ipv4, remote_mac, iface); execute_command("ip -6 neigh add %s lladdr %s dev %s nud permanent", remote_ipv6, remote_mac, iface); execute_command("ip link set dev %s up", iface); } static void setup_tun(uint64_t pid, bool enable_tun) { if (enable_tun) initialize_tun(pid); } struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i; for (i = 0; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += (uint16_t)data[length - 1]; while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } static uintptr_t syz_emit_ethernet(uintptr_t a0, uintptr_t a1) { if (tunfd < 0) return (uintptr_t)-1; int64_t length = a0; char* data = (char*)a1; return write(tunfd, data, length); } static void loop(); static void sandbox_common() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); setsid(); struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = 128 << 20; setrlimit(RLIMIT_AS, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); unshare(CLONE_NEWNS); unshare(CLONE_NEWIPC); unshare(CLONE_IO); } 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) { close(fd); return false; } close(fd); return true; } static int real_uid; static int real_gid; static int epid; static bool etun; __attribute__((aligned(64 << 10))) static char sandbox_stack[1 << 20]; static int namespace_sandbox_proc(void* arg) { sandbox_common(); write_file("/proc/self/setgroups", "deny"); if (!write_file("/proc/self/uid_map", "0 %d 1\n", real_uid)) fail("write of /proc/self/uid_map failed"); if (!write_file("/proc/self/gid_map", "0 %d 1\n", real_gid)) fail("write of /proc/self/gid_map failed"); setup_tun(epid, etun); if (mkdir("./syz-tmp", 0777)) fail("mkdir(syz-tmp) failed"); if (mount("", "./syz-tmp", "tmpfs", 0, NULL)) fail("mount(tmpfs) failed"); if (mkdir("./syz-tmp/newroot", 0777)) fail("mkdir failed"); if (mkdir("./syz-tmp/newroot/dev", 0700)) fail("mkdir failed"); if (mount("/dev", "./syz-tmp/newroot/dev", NULL, MS_BIND | MS_REC | MS_PRIVATE, NULL)) fail("mount(dev) failed"); if (mkdir("./syz-tmp/newroot/proc", 0700)) fail("mkdir failed"); if (mount(NULL, "./syz-tmp/newroot/proc", "proc", 0, NULL)) fail("mount(proc) failed"); if (mkdir("./syz-tmp/pivot", 0777)) fail("mkdir failed"); if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) { if (chdir("./syz-tmp")) fail("chdir failed"); } else { if (chdir("/")) fail("chdir failed"); if (umount2("./pivot", MNT_DETACH)) fail("umount failed"); } if (chroot("./newroot")) fail("chroot failed"); if (chdir("/")) fail("chdir failed"); 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)) fail("capget failed"); cap_data[0].effective &= ~(1 << CAP_SYS_PTRACE); cap_data[0].permitted &= ~(1 << CAP_SYS_PTRACE); cap_data[0].inheritable &= ~(1 << CAP_SYS_PTRACE); if (syscall(SYS_capset, &cap_hdr, &cap_data)) fail("capset failed"); loop(); doexit(1); } static int do_sandbox_namespace(int executor_pid, bool enable_tun) { real_uid = getuid(); real_gid = getgid(); epid = executor_pid; etun = enable_tun; mprotect(sandbox_stack, 4096, PROT_NONE); return clone( namespace_sandbox_proc, &sandbox_stack[sizeof(sandbox_stack) - 64], CLONE_NEWUSER | CLONE_NEWPID | CLONE_NEWUTS | CLONE_NEWNET, NULL); } static void test(); void loop() { while (1) { test(); } } long r[128]; void test() { memset(r, -1, sizeof(r)); r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul, 0xfffffffffffffffful, 0x0ul); r[1] = syscall(__NR_socket, 0xaul, 0x6ul, 0x0ul); memcpy((void*)0x208befe0, "\x73\x69\x74\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00", 16); *(uint16_t*)0x208beff0 = (uint16_t)0x2; *(uint16_t*)0x208beff2 = (uint16_t)0x204e; *(uint8_t*)0x208beff4 = (uint8_t)0xac; *(uint8_t*)0x208beff5 = (uint8_t)0x14; *(uint8_t*)0x208beff6 = (uint8_t)0x0; *(uint8_t*)0x208beff7 = (uint8_t)0xaa; *(uint8_t*)0x208beff8 = (uint8_t)0x0; *(uint8_t*)0x208beff9 = (uint8_t)0x0; *(uint8_t*)0x208beffa = (uint8_t)0x0; *(uint8_t*)0x208beffb = (uint8_t)0x0; *(uint8_t*)0x208beffc = (uint8_t)0x0; *(uint8_t*)0x208beffd = (uint8_t)0x0; *(uint8_t*)0x208beffe = (uint8_t)0x0; *(uint8_t*)0x208befff = (uint8_t)0x0; r[17] = syscall(__NR_ioctl, r[1], 0x8914ul, 0x208befe0ul); *(uint8_t*)0x2000f000 = (uint8_t)0xbb; *(uint8_t*)0x2000f001 = (uint8_t)0xbb; *(uint8_t*)0x2000f002 = (uint8_t)0xbb; *(uint8_t*)0x2000f003 = (uint8_t)0xbb; *(uint8_t*)0x2000f004 = (uint8_t)0xbb; *(uint8_t*)0x2000f005 = (uint8_t)0x0; *(uint8_t*)0x2000f006 = (uint8_t)0x0; *(uint8_t*)0x2000f007 = (uint8_t)0x0; *(uint8_t*)0x2000f008 = (uint8_t)0x0; *(uint8_t*)0x2000f009 = (uint8_t)0x0; *(uint8_t*)0x2000f00a = (uint8_t)0x0; *(uint8_t*)0x2000f00b = (uint8_t)0x0; *(uint16_t*)0x2000f00c = (uint16_t)0xf588; STORE_BY_BITMASK(uint8_t, 0x2000f00e, 0xa, 0, 4); STORE_BY_BITMASK(uint8_t, 0x2000f00e, 0x4, 4, 4); STORE_BY_BITMASK(uint8_t, 0x2000f00f, 0x401, 0, 2); STORE_BY_BITMASK(uint8_t, 0x2000f00f, 0x8, 2, 6); *(uint16_t*)0x2000f010 = (uint16_t)0x3000; *(uint16_t*)0x2000f012 = (uint16_t)0x1fc; *(uint16_t*)0x2000f014 = (uint16_t)0x4; *(uint8_t*)0x2000f016 = (uint8_t)0x400; *(uint8_t*)0x2000f017 = (uint8_t)0x29; *(uint16_t*)0x2000f018 = (uint16_t)0x0; *(uint32_t*)0x2000f01a = (uint32_t)0x20000e0; *(uint32_t*)0x2000f01e = (uint32_t)0x10000e0; *(uint8_t*)0x2000f022 = (uint8_t)0x83; *(uint8_t*)0x2000f023 = (uint8_t)0x13; *(uint8_t*)0x2000f024 = (uint8_t)0x2; *(uint32_t*)0x2000f025 = (uint32_t)0x10000e0; *(uint32_t*)0x2000f029 = (uint32_t)0x100007f; *(uint32_t*)0x2000f02d = (uint32_t)0x1000080; *(uint32_t*)0x2000f031 = (uint32_t)0x20000e0; *(uint8_t*)0x2000f036 = (uint8_t)0x22; *(uint8_t*)0x2000f037 = (uint8_t)0xff; *(uint16_t*)0x2000f038 = (uint16_t)0x0; *(uint32_t*)0x2000f03a = (uint32_t)0x100007f; struct csum_inet csum_54; csum_inet_init(&csum_54); csum_inet_update(&csum_54, (const uint8_t*)0x2000f036, 8); *(uint16_t*)0x2000f038 = csum_inet_digest(&csum_54); struct csum_inet csum_55; csum_inet_init(&csum_55); csum_inet_update(&csum_55, (const uint8_t*)0x2000f00e, 40); *(uint16_t*)0x2000f018 = csum_inet_digest(&csum_55); r[56] = syz_emit_ethernet(0x3eul, 0x2000f000ul); r[57] = syscall(__NR_socket, 0x2ul, 0x806ul, 0x0ul); memcpy((void*)0x20dc4000, "\x6c\x6f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00", 16); *(uint64_t*)0x20dc4010 = (uint64_t)0x4; *(uint64_t*)0x20dc4018 = (uint64_t)0xffffffffffffffff; *(uint16_t*)0x20dc4020 = (uint16_t)0x2; *(uint8_t*)0x20dc4022 = (uint8_t)0x40; *(uint8_t*)0x20dc4023 = (uint8_t)0x2ed5; *(uint8_t*)0x20dc4024 = (uint8_t)0x8; r[65] = syscall(__NR_ioctl, r[57], 0x8922ul, 0x20dc4000ul); r[66] = syscall(__NR_socket, 0xaul, 0x3ul, 0x6ul); memcpy((void*)0x20334000, "\x73\x69\x74\x30\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00", 16); *(uint16_t*)0x20334010 = (uint16_t)0x1; r[69] = syscall(__NR_ioctl, r[66], 0x8914ul, 0x20334000ul); r[70] = syscall(__NR_socket, 0xaul, 0x8000000080803ul, 0x200000000fful); *(uint16_t*)0x20ffcfe4 = (uint16_t)0xa; *(uint16_t*)0x20ffcfe6 = (uint16_t)0x204e; *(uint32_t*)0x20ffcfe8 = (uint32_t)0xfffffffffffffffd; *(uint64_t*)0x20ffcfec = (uint64_t)0x0; *(uint64_t*)0x20ffcff4 = (uint64_t)0x100000000000000; *(uint32_t*)0x20ffcffc = (uint32_t)0xfffffffffffffffd; r[77] = syscall(__NR_connect, r[70], 0x20ffcfe4ul, 0x1cul); *(uint64_t*)0x20fe2f40 = (uint64_t)0x0; *(uint32_t*)0x20fe2f48 = (uint32_t)0x0; *(uint64_t*)0x20fe2f50 = (uint64_t)0x20736f70; *(uint64_t*)0x20fe2f58 = (uint64_t)0x3; *(uint64_t*)0x20fe2f60 = (uint64_t)0x20ff3000; *(uint64_t*)0x20fe2f68 = (uint64_t)0x0; *(uint32_t*)0x20fe2f70 = (uint32_t)0x1; *(uint32_t*)0x20fe2f78 = (uint32_t)0x0; *(uint64_t*)0x20fe2f80 = (uint64_t)0x20f7efff; *(uint32_t*)0x20fe2f88 = (uint32_t)0x0; *(uint64_t*)0x20fe2f90 = (uint64_t)0x20642000; *(uint64_t*)0x20fe2f98 = (uint64_t)0x2; *(uint64_t*)0x20fe2fa0 = (uint64_t)0x20acee40; *(uint64_t*)0x20fe2fa8 = (uint64_t)0x4; *(uint32_t*)0x20fe2fb0 = (uint32_t)0x400f; *(uint32_t*)0x20fe2fb8 = (uint32_t)0x5; *(uint64_t*)0x20fe2fc0 = (uint64_t)0x0; *(uint32_t*)0x20fe2fc8 = (uint32_t)0x0; *(uint64_t*)0x20fe2fd0 = (uint64_t)0x20ff4797; *(uint64_t*)0x20fe2fd8 = (uint64_t)0x0; *(uint64_t*)0x20fe2fe0 = (uint64_t)0x20f51000; *(uint64_t*)0x20fe2fe8 = (uint64_t)0x1; *(uint32_t*)0x20fe2ff0 = (uint32_t)0x20008000; *(uint32_t*)0x20fe2ff8 = (uint32_t)0x2; *(uint64_t*)0x20736f70 = (uint64_t)0x20a4ff16; *(uint64_t*)0x20736f78 = (uint64_t)0x0; *(uint64_t*)0x20736f80 = (uint64_t)0x20869fff; *(uint64_t*)0x20736f88 = (uint64_t)0x0; *(uint64_t*)0x20736f90 = (uint64_t)0x20b69000; *(uint64_t*)0x20736f98 = (uint64_t)0x0; *(uint64_t*)0x20642000 = (uint64_t)0x20aa4000; *(uint64_t*)0x20642008 = (uint64_t)0x0; *(uint64_t*)0x20642010 = (uint64_t)0x20ff3000; *(uint64_t*)0x20642018 = (uint64_t)0x0; *(uint64_t*)0x20acee40 = (uint64_t)0x10; *(uint32_t*)0x20acee48 = (uint32_t)0x88; *(uint32_t*)0x20acee4c = (uint32_t)0x800000006; *(uint64_t*)0x20acee50 = (uint64_t)0x10; *(uint32_t*)0x20acee58 = (uint32_t)0x108; *(uint32_t*)0x20acee5c = (uint32_t)0x9; *(uint64_t*)0x20acee60 = (uint64_t)0x10; *(uint32_t*)0x20acee68 = (uint32_t)0x11f; *(uint32_t*)0x20acee6c = (uint32_t)0x6; *(uint64_t*)0x20acee70 = (uint64_t)0x10; *(uint32_t*)0x20acee78 = (uint32_t)0x10f; *(uint32_t*)0x20acee7c = (uint32_t)0x10001; *(uint64_t*)0x20f51000 = (uint64_t)0x10; *(uint32_t*)0x20f51008 = (uint32_t)0x1; *(uint32_t*)0x20f5100c = (uint32_t)0x7; r[127] = syscall(__NR_sendmmsg, r[70], 0x20fe2f40ul, 0x3ul, 0xc0ul); } int main() { int pid = do_sandbox_namespace(0, true); int status = 0; while (waitpid(pid, &status, __WALL) != pid) { } return 0; }
