./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3832884047 <...> Warning: Permanently added '10.128.1.176' (ED25519) to the list of known hosts. execve("./syz-executor3832884047", ["./syz-executor3832884047"], 0x7ffcb6526b30 /* 10 vars */) = 0 brk(NULL) = 0x555567df7000 brk(0x555567df7d00) = 0x555567df7d00 arch_prctl(ARCH_SET_FS, 0x555567df7380) = 0 set_tid_address(0x555567df7650) = 5821 set_robust_list(0x555567df7660, 24) = 0 rseq(0x555567df7ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3832884047", 4096) = 28 getrandom("\x71\x72\xda\xe7\x84\x65\x6c\xfb", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555567df7d00 brk(0x555567e18d00) = 0x555567e18d00 brk(0x555567e19000) = 0x555567e19000 mprotect(0x7f454621b000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5822 attached [pid 5822] set_robust_list(0x555567df7660, 24 [pid 5821] <... clone resumed>, child_tidptr=0x555567df7650) = 5822 [pid 5822] <... set_robust_list resumed>) = 0 [pid 5821] openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "10000000000", 11) = 11 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "20", 2) = 2 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "1", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "0", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "0", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "1", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "100", 3) = 3 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "0", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "0", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "7 4 1 3", 7) = 7 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "1", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "1", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "0", 1) = 1 [pid 5821] close(3) = 0 [pid 5821] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 5821] write(3, "5822", 4) = 4 [pid 5821] close(3) = 0 [pid 5821] kill(5822, SIGKILL) = 0 [pid 5822] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5822, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=0} --- socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) = 3 socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) = 4 sendto(4, [{nlmsg_len=36, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x03\x00\x00\x00\x0d\x00\x02\x00\x6e\x6c\x38\x30\x32\x31\x35\x34\x00\x00\x00\x00"], 36, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 36 recvfrom(4, [{nlmsg_len=864, nlmsg_type=nlctrl, nlmsg_flags=0, nlmsg_seq=0, nlmsg_pid=5821}, "\x01\x02\x00\x00\x0d\x00\x02\x00\x6e\x6c\x38\x30\x32\x31\x35\x34\x00\x00\x00\x00\x06\x00\x01\x00\x1d\x00\x00\x00\x08\x00\x03\x00\x01\x00\x00\x00\x08\x00\x04\x00\x00\x00\x00\x00\x08\x00\x05\x00\x30\x00\x00\x00\xe8\x02\x06\x00\x14\x00\x01\x00\x08\x00\x01\x00\x01\x00\x00\x00\x08\x00\x02\x00\x0e\x00\x00\x00\x14\x00\x02\x00\x08\x00\x01\x00\x05\x00\x00\x00\x08\x00\x02\x00\x0e\x00\x00\x00\x14\x00\x03\x00"...], 4096, 0, NULL, NULL) = 864 recvfrom(4, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=5821}, {error=0, msg={nlmsg_len=36, nlmsg_type=nlctrl, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36 socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 5 ioctl(5, SIOCGIFINDEX, {ifr_name="wpan0", ifr_ifindex=11}) = 0 close(5) = 0 sendto(4, [{nlmsg_len=36, nlmsg_type=nl802154, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x0b\x00\x00\x00\x08\x00\x03\x00\x0b\x00\x00\x00\x06\x00\x0a\x00\xa0\xaa\x00\x00"], 36, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 36 recvfrom(4, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=5821}, {error=0, msg={nlmsg_len=36, nlmsg_type=nl802154, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36 socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 5 ioctl(5, SIOCGIFINDEX, {ifr_name="wpan0", ifr_ifindex=11}) = 0 close(5) = 0 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\x0c\x00\x01\x00\x02\x00\xaa\xaa\xaa\xaa\xaa\xaa"], 44, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 44 recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=5821}, {error=0, msg={nlmsg_len=44, nlmsg_type=RTM_NEWLINK, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36 sendto(3, [{nlmsg_len=68, nlmsg_type=RTM_NEWLINK, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|NLM_F_EXCL|NLM_F_CREATE, nlmsg_seq=0, nlmsg_pid=0}, {ifi_family=AF_UNSPEC, ifi_type=ARPHRD_NETROM, ifi_index=0, ifi_flags=0, ifi_change=0}, [[{nla_len=11, nla_type=IFLA_IFNAME}, "lowpan0"...], [{nla_len=16, nla_type=IFLA_LINKINFO}, [{nla_len=10, nla_type=IFLA_INFO_KIND}, "lowpan"...]], [{nla_len=8, nla_type=IFLA_LINK}, 11]]], 68, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 68 recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=5821}, {error=0, msg={nlmsg_len=68, nlmsg_type=RTM_NEWLINK, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK|NLM_F_EXCL|NLM_F_CREATE, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36 socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 5 ioctl(5, SIOCGIFINDEX, {ifr_name="wpan1", ifr_ifindex=12}) = 0 close(5) = 0 sendto(4, [{nlmsg_len=36, nlmsg_type=nl802154, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x0b\x00\x00\x00\x08\x00\x03\x00\x0c\x00\x00\x00\x06\x00\x0a\x00\xa1\xaa\x00\x00"], 36, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 36 recvfrom(4, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=5821}, {error=0, msg={nlmsg_len=36, nlmsg_type=nl802154, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36 socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 5 ioctl(5, SIOCGIFINDEX, {ifr_name="wpan1", ifr_ifindex=12}) = 0 close(5) = 0 sendto(3, [{nlmsg_len=44, nlmsg_type=RTM_NEWLINK, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, {ifi_family=AF_UNSPEC, ifi_type=ARPHRD_NETROM, ifi_index=if_nametoindex("wpan1"), ifi_flags=IFF_UP, ifi_change=0x1}, [{nla_len=12, nla_type=IFLA_ADDRESS}, 02:01:aa:aa:aa:aa:aa]], 44, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12) = 44 recvfrom(3, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=5821}, {error=0, msg={nlmsg_len=44, nlmsg_type=RTM_NEWLINK, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36 close(3) = 0 close(4) = 0 mkdir("./syzkaller.DVl6hF", 0700) = 0 chmod("./syzkaller.DVl6hF", 0777) = 0 chdir("./syzkaller.DVl6hF"executing program ) = 0 write(1, "executing program\n", 18) = 18 bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_RINGBUF, key_size=0, value_size=0, max_entries=32768, map_flags=0, inner_map_fd=-1, map_name="", map_ifindex=0, btf_fd=-1, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0, map_extra=0}, 72) = 3 bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_UNSPEC, insn_cnt=12, insns=0x200000000440, license=NULL, log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=-1, func_info_rec_size=0, func_info=NULL, func_info_cnt=0, line_info_rec_size=0, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0, fd_array=NULL}, 144) = -1 EFAULT (Bad address) bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_SYSCALL, insn_cnt=12, insns=0x200000000440, license="GPL", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=BPF_F_ANY_ALIGNMENT|BPF_F_TEST_STATE_FREQ|BPF_F_SLEEPABLE|0x20, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=-1, func_info_rec_size=0, func_info=NULL, func_info_cnt=0, line_info_rec_size=0, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0, fd_array=NULL}, 144) = 4 [ 78.389313][ T5821] [ 78.391752][ T5821] ============================= [ 78.397221][ T5821] WARNING: suspicious RCU usage [ 78.402083][ T5821] 6.16.0-rc4-syzkaller-00049-gb4911fb0b060 #0 Not tainted [ 78.409456][ T5821] ----------------------------- [ 78.414392][ T5821] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage! [ 78.422940][ T5821] [ 78.422940][ T5821] other info that might help us debug this: [ 78.422940][ T5821] [ 78.433237][ T5821] bpf(BPF_PROG_TEST_RUN, {test={prog_fd=4, retval=4294967295, data_size_in=0, data_size_out=0, data_in=NULL, data_out=NULL, repeat=0, duration=0}}, 12) = 0 exit_group(0) = ? [ 78.433237][ T5821] rcu_scheduler_active = 2, debug_locks = 1 [ 78.441338][ T5821] 1 lock held by syz-executor383/5821: [ 78.446834][ T5821] #0: ffffffff8e13f000 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 78.457113][ T5821] [ 78.457113][ T5821] stack backtrace: [ 78.463026][ T5821] CPU: 0 UID: 0 PID: 5821 Comm: syz-executor383 Not tainted 6.16.0-rc4-syzkaller-00049-gb4911fb0b060 #0 PREEMPT(full) [ 78.463043][ T5821] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 78.463054][ T5821] Call Trace: [ 78.463062][ T5821] [ 78.463067][ T5821] dump_stack_lvl+0x189/0x250 [ 78.463091][ T5821] ? __pfx_dump_stack_lvl+0x10/0x10 [ 78.463111][ T5821] ? __pfx__printk+0x10/0x10 [ 78.463133][ T5821] lockdep_rcu_suspicious+0x140/0x1d0 [ 78.463155][ T5821] get_callchain_entry+0x2b6/0x3c0 [ 78.463174][ T5821] get_perf_callchain+0xa1/0x6b0 [ 78.463208][ T5821] ? __pfx_get_perf_callchain+0x10/0x10 [ 78.463239][ T5821] __bpf_get_stack+0x3fc/0xa60 [ 78.463284][ T5821] ? __pfx___bpf_get_stack+0x10/0x10 [ 78.463304][ T5821] ? __lock_acquire+0xab9/0xd20 [ 78.463328][ T5821] bpf_get_stack+0x33/0x50 [ 78.463346][ T5821] ? bpf_prog_b8a90dd1efcc4ad9+0x46/0x4e [ 78.463363][ T5821] bpf_get_stack_raw_tp+0x1a9/0x220 [ 78.463383][ T5821] bpf_prog_b8a90dd1efcc4ad9+0x46/0x4e [ 78.463396][ T5821] bpf_prog_run_pin_on_cpu+0x6a/0x150 [ 78.463416][ T5821] bpf_prog_test_run_syscall+0x312/0x4b0 [ 78.463435][ T5821] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 78.463457][ T5821] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 78.463474][ T5821] bpf_prog_test_run+0x2c7/0x340 [ 78.463496][ T5821] __sys_bpf+0x4a4/0x860 [ 78.463516][ T5821] ? __pfx___sys_bpf+0x10/0x10 [ 78.463548][ T5821] ? rcu_is_watching+0x15/0xb0 [ 78.463575][ T5821] __x64_sys_bpf+0x7c/0x90 [ 78.463592][ T5821] do_syscall_64+0xfa/0x3b0 [ 78.463615][ T5821] ? lockdep_hardirqs_on+0x9c/0x150 [ 78.463635][ T5821] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 78.463649][ T5821] ? clear_bhb_loop+0x60/0xb0 [ 78.463667][ T5821] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 78.463681][ T5821] RIP: 0033:0x7f45461a99d9 [ 78.463694][ T5821] Code: d8 5b c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 78.463705][ T5821] RSP: 002b:00007ffff0a84a18 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 78.463720][ T5821] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f45461a99d9 [ 78.463730][ T5821] RDX: 000000000000000c RSI: 00002000000004c0 RDI: 000000000000000a +++ exited with 0 +++ [ 78.463739][ T5821] RBP: 00002000000000c0 R08: 000000000000