./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3999719874 <...> Warning: Permanently added '10.128.1.26' (ED25519) to the list of known hosts. execve("./syz-executor3999719874", ["./syz-executor3999719874"], 0x7fff95de4b10 /* 10 vars */) = 0 brk(NULL) = 0x55557a09b000 brk(0x55557a09bd00) = 0x55557a09bd00 arch_prctl(ARCH_SET_FS, 0x55557a09b380) = 0 set_tid_address(0x55557a09b650) = 5087 set_robust_list(0x55557a09b660, 24) = 0 rseq(0x55557a09bca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3999719874", 4096) = 28 getrandom("\x17\x46\x24\x5c\x6b\xfb\xee\xd0", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557a09bd00 brk(0x55557a0bcd00) = 0x55557a0bcd00 brk(0x55557a0bd000) = 0x55557a0bd000 mprotect(0x7fe3d694e000, 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 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 [ 77.019513][ T5087] [ 77.022085][ T5087] ============================= [ 77.026934][ T5087] WARNING: suspicious RCU usage [ 77.031860][ T5087] 6.9.0-rc6-syzkaller-00130-ga26ff37e624d #0 Not tainted [ 77.039010][ T5087] ----------------------------- [ 77.043933][ T5087] kernel/events/callchain.c:161 suspicious rcu_dereference_check() usage! [ 77.052576][ T5087] [ 77.052576][ T5087] other info that might help us debug this: [ 77.052576][ T5087] [ 77.062876][ T5087] [ 77.062876][ T5087] rcu_scheduler_active = 2, debug_locks = 1 [ 77.070972][ T5087] 1 lock held by syz-executor399/5087: [ 77.076529][ T5087] #0: ffffffff8e335240 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 77.087676][ T5087] [ 77.087676][ T5087] stack backtrace: [ 77.093709][ T5087] CPU: 1 PID: 5087 Comm: syz-executor399 Not tainted 6.9.0-rc6-syzkaller-00130-ga26ff37e624d #0 [ 77.104149][ T5087] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 77.114306][ T5087] Call Trace: [ 77.117609][ T5087] [ 77.120551][ T5087] dump_stack_lvl+0x241/0x360 [ 77.125268][ T5087] ? __pfx_dump_stack_lvl+0x10/0x10 [ 77.130493][ T5087] ? __pfx__printk+0x10/0x10 [ 77.135115][ T5087] lockdep_rcu_suspicious+0x221/0x340 [ 77.140510][ T5087] get_callchain_entry+0x2b4/0x3c0 [ 77.145840][ T5087] get_perf_callchain+0xea/0x840 [ 77.150822][ T5087] ? __pfx_get_perf_callchain+0x10/0x10 [ 77.156514][ T5087] __bpf_get_stack+0x3d4/0x5a0 [ 77.161346][ T5087] ? __pfx___bpf_get_stack+0x10/0x10 [ 77.166683][ T5087] ? __pfx___cant_migrate+0x10/0x10 [ 77.171907][ T5087] bpf_get_stack_raw_tp+0x1a3/0x240 [ 77.177126][ T5087] bpf_prog_b8a90dd1efcc4ad9+0x45/0x49 [ 77.182684][ T5087] bpf_prog_run_pin_on_cpu+0x66/0x150 [ 77.188071][ T5087] bpf_prog_test_run_syscall+0x316/0x4e0 [ 77.193736][ T5087] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 77.199922][ T5087] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 77.206103][ T5087] bpf_prog_test_run+0x33a/0x3b0 [ 77.211069][ T5087] __sys_bpf+0x48d/0x810 [ 77.215367][ T5087] ? __pfx___sys_bpf+0x10/0x10 [ 77.220209][ T5087] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 77.226580][ T5087] ? do_syscall_64+0x102/0x240 [ 77.231896][ T5087] __x64_sys_bpf+0x7c/0x90 [ 77.236332][ T5087] do_syscall_64+0xf5/0x240 [ 77.240953][ T5087] ? clear_bhb_loop+0x35/0x90 [ 77.245759][ T5087] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 77.251687][ T5087] RIP: 0033:0x7fe3d68db669 [ 77.256122][ T5087] 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 [ 77.275855][ T5087] RSP: 002b:00007ffd39f2ddd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 77.284431][ T5087] RAX: ffffffffffffffda RBX: 00007ffd39f2dfa8 RCX: 00007fe3d68db669 [ 77.292638][ T5087] RDX: 000000000000000c RSI: 00000000200004c0 RDI: 000000000000000a [ 77.301401][ T5087] RBP: 00007fe3d694e610 R08: 00007ffd39f2dfa8 R09: 00007ffd39f2dfa8 [ 77.309579][ T5087] R10: 00007ffd39f2dfa8 R11: 0000000000000246 R12: 0000000000000001 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 +++ [ 77.317772][ T5087] R13: 0