./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2147913010 <...> Warning: Permanently added '10.128.0.93' (ED25519) to the list of known hosts. execve("./syz-executor2147913010", ["./syz-executor2147913010"], 0x7fff8b19c090 /* 10 vars */) = 0 brk(NULL) = 0x555555e36000 brk(0x555555e36d00) = 0x555555e36d00 arch_prctl(ARCH_SET_FS, 0x555555e36380) = 0 set_tid_address(0x555555e36650) = 5087 set_robust_list(0x555555e36660, 24) = 0 rseq(0x555555e36ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2147913010", 4096) = 28 getrandom("\x39\x0e\x22\x30\x75\x9b\xdb\x21", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555e36d00 brk(0x555555e57d00) = 0x555555e57d00 brk(0x555555e58000) = 0x555555e58000 mprotect(0x7fb13cce7000, 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 [ 75.185042][ T5087] [ 75.187623][ T5087] ============================= [ 75.192633][ T5087] WARNING: suspicious RCU usage [ 75.197498][ T5087] 6.9.0-rc5-syzkaller-00171-gb2ff42c6d3ab #0 Not tainted [ 75.204583][ T5087] ----------------------------- [ 75.209522][ T5087] kernel/events/callchain.c:161 suspicious rcu_dereference_check() usage! [ 75.218126][ T5087] [ 75.218126][ T5087] other info that might help us debug this: [ 75.218126][ T5087] [ 75.228430][ T5087] [ 75.228430][ T5087] rcu_scheduler_active = 2, debug_locks = 1 [ 75.236597][ T5087] 1 lock held by syz-executor214/5087: [ 75.242223][ T5087] #0: ffffffff8e3351c0 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 75.252575][ T5087] [ 75.252575][ T5087] stack backtrace: [ 75.258498][ T5087] CPU: 0 PID: 5087 Comm: syz-executor214 Not tainted 6.9.0-rc5-syzkaller-00171-gb2ff42c6d3ab #0 [ 75.269373][ T5087] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 75.279457][ T5087] Call Trace: [ 75.282777][ T5087] [ 75.285755][ T5087] dump_stack_lvl+0x241/0x360 [ 75.290473][ T5087] ? __pfx_dump_stack_lvl+0x10/0x10 [ 75.295699][ T5087] ? __pfx__printk+0x10/0x10 [ 75.300313][ T5087] lockdep_rcu_suspicious+0x221/0x340 [ 75.305705][ T5087] get_callchain_entry+0x2b4/0x3c0 [ 75.310871][ T5087] get_perf_callchain+0xea/0x840 [ 75.315831][ T5087] ? __pfx_get_perf_callchain+0x10/0x10 [ 75.321410][ T5087] __bpf_get_stack+0x3d4/0x5a0 [ 75.326285][ T5087] ? __pfx___bpf_get_stack+0x10/0x10 [ 75.331687][ T5087] ? __pfx___cant_migrate+0x10/0x10 [ 75.336904][ T5087] bpf_get_stack_raw_tp+0x1a3/0x240 [ 75.342120][ T5087] bpf_prog_b8a90dd1efcc4ad9+0x45/0x49 [ 75.347589][ T5087] bpf_prog_run_pin_on_cpu+0x66/0x150 [ 75.352976][ T5087] bpf_prog_test_run_syscall+0x316/0x4e0 [ 75.358618][ T5087] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 75.364819][ T5087] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 75.370992][ T5087] bpf_prog_test_run+0x33a/0x3b0 [ 75.375949][ T5087] __sys_bpf+0x48d/0x810 [ 75.380215][ T5087] ? __pfx___sys_bpf+0x10/0x10 [ 75.385029][ T5087] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 75.391367][ T5087] ? do_syscall_64+0x102/0x240 [ 75.396151][ T5087] __x64_sys_bpf+0x7c/0x90 [ 75.400602][ T5087] do_syscall_64+0xf5/0x240 [ 75.405123][ T5087] ? clear_bhb_loop+0x35/0x90 [ 75.409814][ T5087] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.415722][ T5087] RIP: 0033:0x7fb13cc74669 [ 75.420151][ 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 [ 75.439791][ T5087] RSP: 002b:00007ffe8a93a568 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 75.448227][ T5087] RAX: ffffffffffffffda RBX: 00007ffe8a93a738 RCX: 00007fb13cc74669 [ 75.456313][ T5087] RDX: 000000000000000c RSI: 00000000200004c0 RDI: 000000000000000a [ 75.464407][ T5087] RBP: 00007fb13cce7610 R08: 00007ffe8a93a738 R09: 00007ffe8a93a738 [ 75.472399][ T5087] R10: 00007ffe8a93a738 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 +++ [ 75.480379][ T5087] R13: 00007ffe8a93a728 R14: 0000000000000001 R15: 00