./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1242203267 <...> Warning: Permanently added '10.128.15.211' (ED25519) to the list of known hosts. execve("./syz-executor1242203267", ["./syz-executor1242203267"], 0x7fff40a8bd00 /* 10 vars */) = 0 brk(NULL) = 0x555555678000 brk(0x555555678d00) = 0x555555678d00 arch_prctl(ARCH_SET_FS, 0x555555678380) = 0 set_tid_address(0x555555678650) = 5088 set_robust_list(0x555555678660, 24) = 0 rseq(0x555555678ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1242203267", 4096) = 28 getrandom("\xae\x2f\x45\x44\x87\xa9\x36\xb4", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555678d00 brk(0x555555699d00) = 0x555555699d00 brk(0x55555569a000) = 0x55555569a000 mprotect(0x7fcb76bc4000, 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 executing program 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=0x20000440, 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=0x20000440, 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 [ 61.123750][ T5088] [ 61.126368][ T5088] ============================= [ 61.131339][ T5088] WARNING: suspicious RCU usage [ 61.136266][ T5088] 6.9.0-syzkaller-g6f130e4d4a5f #0 Not tainted [ 61.142475][ T5088] ----------------------------- [ 61.147339][ T5088] kernel/events/callchain.c:161 suspicious rcu_dereference_check() usage! [ 61.155902][ T5088] [ 61.155902][ T5088] other info that might help us debug this: [ 61.155902][ T5088] [ 61.166189][ T5088] [ 61.166189][ T5088] rcu_scheduler_active = 2, debug_locks = 1 [ 61.174340][ T5088] 1 lock held by syz-executor124/5088: [ 61.179824][ T5088] #0: ffffffff8e3341e0 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 61.190087][ T5088] [ 61.190087][ T5088] stack backtrace: [ 61.196074][ T5088] CPU: 1 PID: 5088 Comm: syz-executor124 Not tainted 6.9.0-syzkaller-g6f130e4d4a5f #0 [ 61.205706][ T5088] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 61.215778][ T5088] Call Trace: [ 61.219290][ T5088] [ 61.222240][ T5088] dump_stack_lvl+0x241/0x360 [ 61.227098][ T5088] ? __pfx_dump_stack_lvl+0x10/0x10 [ 61.232398][ T5088] ? __pfx__printk+0x10/0x10 [ 61.237099][ T5088] lockdep_rcu_suspicious+0x221/0x340 [ 61.242496][ T5088] get_callchain_entry+0x2b4/0x3c0 [ 61.247617][ T5088] get_perf_callchain+0xea/0x840 [ 61.252580][ T5088] ? mark_lock+0x9a/0x350 [ 61.256918][ T5088] ? __pfx_get_perf_callchain+0x10/0x10 [ 61.263089][ T5088] ? __lock_acquire+0x1346/0x1fd0 [ 61.268294][ T5088] __bpf_get_stack+0x3d4/0x5a0 [ 61.273054][ T5088] ? __pfx___bpf_get_stack+0x10/0x10 [ 61.278351][ T5088] ? __pfx_lock_acquire+0x10/0x10 [ 61.283471][ T5088] bpf_get_stack_raw_tp+0x1a3/0x240 [ 61.288673][ T5088] bpf_prog_b8a90dd1efcc4ad9+0x45/0x49 [ 61.294151][ T5088] bpf_prog_run_pin_on_cpu+0x67/0x150 [ 61.299635][ T5088] bpf_prog_test_run_syscall+0x316/0x4e0 [ 61.305375][ T5088] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 61.311559][ T5088] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 61.318338][ T5088] bpf_prog_test_run+0x33a/0x3b0 [ 61.323285][ T5088] __sys_bpf+0x48d/0x810 [ 61.327573][ T5088] ? __pfx___sys_bpf+0x10/0x10 [ 61.332361][ T5088] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 61.338786][ T5088] ? do_syscall_64+0x102/0x240 [ 61.343568][ T5088] __x64_sys_bpf+0x7c/0x90 [ 61.347995][ T5088] do_syscall_64+0xf5/0x240 [ 61.352583][ T5088] ? clear_bhb_loop+0x35/0x90 [ 61.357292][ T5088] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 61.363298][ T5088] RIP: 0033:0x7fcb76b51669 [ 61.367813][ T5088] Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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 [ 61.387422][ T5088] RSP: 002b:00007ffd8cb2a628 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 61.395842][ T5088] RAX: ffffffffffffffda RBX: 00007ffd8cb2a7f8 RCX: 00007fcb76b51669 [ 61.403940][ T5088] RDX: 000000000000000c RSI: 00000000200004c0 RDI: 000000000000000a [ 61.411916][ T5088] RBP: 00007fcb76bc4610 R08: 00007ffd8cb2a7f8 R09: 00007ffd8cb2a7f8 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) = ? +++ exited with 0 +++ [ 61.419999][ T5088] R10: 00007ffd8cb2a7f8 R11: 000000000000