./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor117471494 <...> Warning: Permanently added '10.128.1.72' (ED25519) to the list of known hosts. execve("./syz-executor117471494", ["./syz-executor117471494"], 0x7fff4a7279e0 /* 10 vars */) = 0 brk(NULL) = 0x55555e46f000 brk(0x55555e46fd00) = 0x55555e46fd00 arch_prctl(ARCH_SET_FS, 0x55555e46f380) = 0 set_tid_address(0x55555e46f650) = 5863 set_robust_list(0x55555e46f660, 24) = 0 rseq(0x55555e46fca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor117471494", 4096) = 27 getrandom("\x61\xbb\x3d\xd2\xaa\xcb\x8d\xb7", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555e46fd00 brk(0x55555e490d00) = 0x55555e490d00 brk(0x55555e491000) = 0x55555e491000 mprotect(0x7f472c868000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555e46f650) = 5864 ./strace-static-x86_64: Process 5864 attached [pid 5864] set_robust_list(0x55555e46f660, 24) = 0 [pid 5864] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5864] getppid() = 0 [pid 5864] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5864] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5864] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5864] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5864] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5864] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5864] unshare(CLONE_NEWNS) = 0 [pid 5864] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5864] unshare(CLONE_NEWIPC) = 0 [pid 5864] unshare(CLONE_NEWCGROUP) = 0 [pid 5864] unshare(CLONE_NEWUTS) = 0 [pid 5864] unshare(CLONE_SYSVSEM) = 0 [pid 5864] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "16777216", 8) = 8 [pid 5864] close(3) = 0 [pid 5864] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "536870912", 9) = 9 [pid 5864] close(3) = 0 [pid 5864] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "1024", 4) = 4 [pid 5864] close(3) = 0 [pid 5864] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "8192", 4) = 4 [pid 5864] close(3) = 0 [pid 5864] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "1024", 4) = 4 [pid 5864] close(3) = 0 [pid 5864] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "1024", 4) = 4 [pid 5864] close(3) = 0 [pid 5864] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5864] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5864] close(3) = 0 [pid 5864] getpid() = 1 [pid 5864] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5871] set_robust_list(0x55555e46f660, 24 [pid 5864] <... clone resumed>, child_tidptr=0x55555e46f650) = 2 [pid 5871] <... set_robust_list resumed>) = 0 [pid 5871] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5871] setpgid(0, 0) = 0 [pid 5871] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5871] write(3, "1000", 4) = 4 [pid 5871] close(3) = 0 [pid 5871] write(1, "executing program\n", 18executing program ) = 18 [pid 5871] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 3 [pid 5871] socket(AF_CAN, SOCK_DGRAM, CAN_J1939) = 4 [pid 5871] ioctl(4, SIOCGIFINDEX, {ifr_name="vcan0", ifr_ifindex=13}) = 0 [pid 5871] bind(4, {sa_family=AF_CAN, sa_data="\x00\x00\x0d\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x06\x00\xfe\x00\x00\x00"}, 24) = 0 [pid 5871] socket(AF_CAN, SOCK_DGRAM, CAN_J1939) = 5 [pid 5871] ioctl(5, SIOCGIFINDEX, {ifr_name="vcan0", ifr_ifindex=13}) = 0 [ 162.733653][ T5871] netlink: 4 bytes leftover after parsing attributes in process `syz-executor117'. [pid 5871] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x24\x00\x00\x00\x11\x00\x01\x00\x28\xbd\x70\x00\x00\x00\x00\x00\x00\x00\x74\x00\x0d\x00\x00\x00\xfd\xff\x10\x00\x01\x00\x01\x00\xf2\xff\x0d\x00", iov_len=36}], msg_iovlen=1, msg_controllen=0, msg_flags=MSG_PEEK|MSG_PROBE|MSG_NOSIGNAL}, MSG_DONTWAIT|MSG_CONFIRM [pid 5864] kill(-2, SIGKILL) = 0 [pid 5864] kill(2, SIGKILL) = 0 [pid 5864] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5864] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5864] getdents64(3, 0x55555e4706f0 /* 2 entries */, 32768) = 48 [pid 5864] getdents64(3, 0x55555e4706f0 /* 0 entries */, 32768) = 0 [pid 5864] close(3) = 0 [ 302.844240][ T5871] unregister_netdevice: waiting for vcan0 to become free. Usage count = 2