./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2775455901

<...>
DUID 00:04:c5:78:79:07:21:f0:b3:e0:09:b6:1a:d6:4d:97:86:4f
forked to background, child pid 3190
[   25.571101][ T3191] 8021q: adding VLAN 0 to HW filter on device bond0
[   25.574178][ T3191] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting sshd: OK

syzkaller
Warning: Permanently added '10.128.0.233' (ECDSA) to the list of known hosts.
execve("./syz-executor2775455901", ["./syz-executor2775455901"], 0x7fff27316cb0 /* 10 vars */) = 0
brk(NULL)                               = 0x555556a62000
brk(0x555556a62c40)                     = 0x555556a62c40
arch_prctl(ARCH_SET_FS, 0x555556a62300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
readlink("/proc/self/exe", "/root/syz-executor2775455901", 4096) = 28
brk(0x555556a83c40)                     = 0x555556a83c40
brk(0x555556a84000)                     = 0x555556a84000
mprotect(0x7ffb76e60000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
unshare(CLONE_NEWPID)                   = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3619 attached
, child_tidptr=0x555556a625d0) = 3619
[pid  3619] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy)
[pid  3619] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  3619] setsid()                    = 1
[pid  3619] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0
[pid  3619] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0
[pid  3619] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0
[pid  3619] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0
[pid  3619] prlimit64(0, RLIMIT_CORE, {rlim_cur=0, rlim_max=0}, NULL) = 0
[pid  3619] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0
[pid  3619] unshare(CLONE_NEWNS)        = 0
[pid  3619] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0
[pid  3619] unshare(CLONE_NEWIPC)       = 0
[pid  3619] unshare(CLONE_NEWCGROUP)    = 0
[pid  3619] unshare(CLONE_NEWUTS)       = 0
[pid  3619] unshare(CLONE_SYSVSEM)      = 0
[pid  3619] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3
[pid  3619] write(3, "16777216", 8)     = 8
[pid  3619] close(3)                    = 0
[pid  3619] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3
[pid  3619] write(3, "536870912", 9)    = 9
[pid  3619] close(3)                    = 0
[pid  3619] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3
[pid  3619] write(3, "1024", 4)         = 4
[pid  3619] close(3)                    = 0
[pid  3619] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3
[pid  3619] write(3, "8192", 4)         = 4
[pid  3619] close(3)                    = 0
[pid  3619] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3
[pid  3619] write(3, "1024", 4)         = 4
[pid  3619] close(3)                    = 0
[pid  3619] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3
[pid  3619] write(3, "1024", 4)         = 4
[pid  3619] close(3)                    = 0
[pid  3619] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3
[pid  3619] write(3, "1024 1048576 500 1024", 21) = 21
[pid  3619] close(3)                    = 0
[pid  3619] getpid()                    = 1
[pid  3619] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid  3619] capset({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid  3619] unshare(CLONE_NEWNET)       = 0
[pid  3619] openat(AT_FDCWD, "/dev/net/tun", O_RDWR|O_NONBLOCK) = 3
[pid  3619] dup2(3, 200)                = 200
[pid  3619] close(3)                    = 0
[pid  3619] ioctl(200, TUNSETIFF, 0x7ffd0ea28640) = 0
[pid  3619] openat(AT_FDCWD, "/proc/sys/net/ipv6/conf/syz_tun/accept_dad", O_WRONLY|O_CLOEXEC) = 3
[pid  3619] write(3, "0", 1)            = 1
[pid  3619] close(3)                    = 0
[pid  3619] openat(AT_FDCWD, "/proc/sys/net/ipv6/conf/syz_tun/router_solicitations", O_WRONLY|O_CLOEXEC) = 3
[pid  3619] write(3, "0", 1)            = 1
[pid  3619] close(3)                    = 0
[pid  3619] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 3
[pid  3619] access("/proc/net", R_OK)   = 0
[pid  3619] access("/proc/net/unix", R_OK) = 0
[pid  3619] socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
[pid  3619] ioctl(4, SIOCGIFINDEX, {ifr_name="syz_tun", ifr_ifindex=11}) = 0
[pid  3619] close(4)                    = 0
[pid  3619] sendto(3, [{nlmsg_len=40, nlmsg_type=0x14 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x500, nlmsg_seq=0, nlmsg_pid=0}, "\x02\x18\x00\x00\x0b\x00\x00\x00\x08\x00\x02\x00\xac\x14\x14\xaa\x08\x00\x01\x00\xac\x14\x14\xaa"], 40, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 40
[pid  3619] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=1}, {error=0, msg={nlmsg_len=40, nlmsg_type=0x14 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x500, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36
[pid  3619] socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
[pid  3619] ioctl(4, SIOCGIFINDEX, {ifr_name="syz_tun", ifr_ifindex=11}) = 0
[pid  3619] close(4)                    = 0
[pid  3619] sendto(3, [{nlmsg_len=64, nlmsg_type=0x14 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x500, nlmsg_seq=0, nlmsg_pid=0}, "\x0a\x78\x00\x00\x0b\x00\x00\x00\x14\x00\x02\x00\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xaa\x14\x00\x01\x00\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xaa"], 64, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 64
[pid  3619] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=1}, {error=0, msg={nlmsg_len=64, nlmsg_type=0x14 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x500, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36
[pid  3619] socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
[pid  3619] ioctl(4, SIOCGIFINDEX, {ifr_name="syz_tun", ifr_ifindex=11}) = 0
[pid  3619] close(4)                    = 0
[pid  3619] sendto(3, [{nlmsg_len=48, nlmsg_type=0x1c /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x600, nlmsg_seq=0, nlmsg_pid=0}, "\x02\x00\x00\x00\x0b\x00\x00\x00\x80\x00\x00\x00\x08\x00\x01\x00\xac\x14\x14\xbb\x0a\x00\x02\x00\xbb\xaa\xaa\xaa\xaa\xaa\x00\x00"], 48, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 48
[pid  3619] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=1}, {error=0, msg={nlmsg_len=48, nlmsg_type=0x1c /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x600, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36
[pid  3619] socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
[pid  3619] ioctl(4, SIOCGIFINDEX, {ifr_name="syz_tun", ifr_ifindex=11}) = 0
[pid  3619] close(4)                    = 0
[pid  3619] sendto(3, [{nlmsg_len=60, nlmsg_type=0x1c /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x600, nlmsg_seq=0, nlmsg_pid=0}, "\x0a\x00\x00\x00\x0b\x00\x00\x00\x80\x00\x00\x00\x14\x00\x01\x00\xfe\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xbb\x0a\x00\x02\x00\xbb\xaa\xaa\xaa\xaa\xaa\x00\x00"], 60, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 60
[pid  3619] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=1}, {error=0, msg={nlmsg_len=60, nlmsg_type=0x1c /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|0x600, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36
[pid  3619] socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 4
[pid  3619] ioctl(4, SIOCGIFINDEX, {ifr_name="syz_tun", ifr_ifindex=11}) = 0
[pid  3619] close(4)                    = 0
[pid  3619] sendto(3, [{nlmsg_len=44, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x00\x00\x00\x00\x0b\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x0a\x00\x01\x00\xaa\xaa\xaa\xaa\xaa\xaa\x00\x00"], 44, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 44
[pid  3619] recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=1}, {error=0, msg={nlmsg_len=44, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36
[pid  3619] close(3)                    = 0
[pid  3619] mkdir("/dev/binderfs", 0777) = 0
[pid  3619] mount("binder", "/dev/binderfs", "binder", 0, NULL) = 0
[pid  3619] symlink("/dev/binderfs", "./binderfs") = 0
[pid  3619] socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 3
[pid  3619] setsockopt(3, SOL_NETLINK, NETLINK_GET_STRICT_CHK, [16384], 16) = 0
[pid  3619] sendmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x18\x00\x00\x00\x3a\x00\x01\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x0a\x00\x00\x00\x09\x00\x00\x00", iov_len=24}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 24
[pid  3619] exit_group(1)               = ?
syzkaller login: [   48.239480][ T3619] 
[   48.239488][ T3619] =============================
[   48.239493][ T3619] WARNING: suspicious RCU usage
[   48.239499][ T3619] 5.19.0-rc2-syzkaller-00147-gf0ec9c65a8d6 #0 Not tainted
[   48.239512][ T3619] -----------------------------
[   48.239517][ T3619] net/ipv6/addrconf.c:5175 suspicious rcu_dereference_check() usage!
[   48.239532][ T3619] 
[   48.239532][ T3619] other info that might help us debug this:
[   48.239532][ T3619] 
[   48.239538][ T3619] 
[pid  3619] +++ exited with 1 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3619, si_uid=0, si_status=1, si_utime=0, si_stime=8} ---
exit_group(0)                           = ?
+++ exited with 0 +++
[   48.239538][ T3619] rcu_schedul