./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1466717632 <...> Warning: Permanently added '10.128.0.229' (ED25519) to the list of known hosts. execve("./syz-executor1466717632", ["./syz-executor1466717632"], 0x7ffc1b44c370 /* 10 vars */) = 0 brk(NULL) = 0x555583714000 brk(0x555583714d00) = 0x555583714d00 arch_prctl(ARCH_SET_FS, 0x555583714380) = 0 set_tid_address(0x555583714650) = 5097 set_robust_list(0x555583714660, 24) = 0 rseq(0x555583714ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1466717632", 4096) = 28 getrandom("\xd2\x6a\xd0\x44\xf1\xac\x1d\xd5", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555583714d00 brk(0x555583735d00) = 0x555583735d00 brk(0x555583736000) = 0x555583736000 mprotect(0x7f3fcb648000, 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_RND_HI32|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 [ 58.385789][ T5097] [ 58.388525][ T5097] ============================= [ 58.393377][ T5097] WARNING: suspicious RCU usage [ 58.398365][ T5097] 6.10.0-rc1-syzkaller-00164-ga535d5943237 #0 Not tainted [ 58.405485][ T5097] ----------------------------- [ 58.410422][ T5097] kernel/events/callchain.c:161 suspicious rcu_dereference_check() usage! [ 58.418968][ T5097] [ 58.418968][ T5097] other info that might help us debug this: [ 58.418968][ T5097] [ 58.429312][ T5097] [ 58.429312][ T5097] rcu_scheduler_active = 2, debug_locks = 1 [ 58.437774][ T5097] 1 lock held by syz-executor146/5097: [ 58.443256][ T5097] #0: ffffffff8e334420 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 58.453562][ T5097] [ 58.453562][ T5097] stack backtrace: [ 58.459517][ T5097] CPU: 1 PID: 5097 Comm: syz-executor146 Not tainted 6.10.0-rc1-syzkaller-00164-ga535d5943237 #0 [ 58.470014][ T5097] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 58.480055][ T5097] Call Trace: [ 58.483494][ T5097] [ 58.486425][ T5097] dump_stack_lvl+0x241/0x360 [ 58.491094][ T5097] ? __pfx_dump_stack_lvl+0x10/0x10 [ 58.496319][ T5097] ? __pfx__printk+0x10/0x10 [ 58.500908][ T5097] lockdep_rcu_suspicious+0x221/0x340 [ 58.506269][ T5097] get_callchain_entry+0x2b4/0x3c0 [ 58.511369][ T5097] get_perf_callchain+0xea/0x840 [ 58.516286][ T5097] ? mark_lock+0x9a/0x350 [ 58.520611][ T5097] ? __pfx_get_perf_callchain+0x10/0x10 [ 58.526139][ T5097] ? __lock_acquire+0x1346/0x1fd0 [ 58.531178][ T5097] __bpf_get_stack+0x3d4/0x5a0 [ 58.535935][ T5097] ? __pfx___bpf_get_stack+0x10/0x10 [ 58.541207][ T5097] ? __pfx_lock_acquire+0x10/0x10 [ 58.546230][ T5097] bpf_get_stack_raw_tp+0x1a3/0x240 [ 58.551426][ T5097] bpf_prog_d43750871481577d+0x45/0x49 [ 58.556865][ T5097] bpf_prog_run_pin_on_cpu+0x67/0x150 [ 58.562236][ T5097] bpf_prog_test_run_syscall+0x316/0x4e0 [ 58.567883][ T5097] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 58.574036][ T5097] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 58.580198][ T5097] bpf_prog_test_run+0x33a/0x3b0 [ 58.585125][ T5097] __sys_bpf+0x48d/0x810 [ 58.589372][ T5097] ? __pfx___sys_bpf+0x10/0x10 [ 58.594133][ T5097] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 58.600442][ T5097] ? do_syscall_64+0x100/0x230 [ 58.605190][ T5097] __x64_sys_bpf+0x7c/0x90 [ 58.609597][ T5097] do_syscall_64+0xf3/0x230 [ 58.614096][ T5097] ? clear_bhb_loop+0x35/0x90 [ 58.618765][ T5097] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 58.624641][ T5097] RIP: 0033:0x7f3fcb5d5669 [ 58.629159][ T5097] 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 [ 58.648882][ T5097] RSP: 002b:00007fff928561a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 58.657550][ T5097] RAX: ffffffffffffffda RBX: 00007fff92856378 RCX: 00007f3fcb5d5669 [ 58.665523][ T5097] RDX: 000000000000000c RSI: 00000000200004c0 RDI: 000000000000000a [ 58.673576][ T5097] RBP: 00007f3fcb648610 R08: 00007fff92856378 R09: 00007fff92856378 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 +++ [ 58.681535][ T5097] R10: 00007fff92856378 R11: 0000000000000246