./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor239605674 <...> Warning: Permanently added '10.128.1.39' (ED25519) to the list of known hosts. execve("./syz-executor239605674", ["./syz-executor239605674"], 0x7ffe204eb3a0 /* 10 vars */) = 0 brk(NULL) = 0x55557295f000 brk(0x55557295fd00) = 0x55557295fd00 arch_prctl(ARCH_SET_FS, 0x55557295f380) = 0 set_tid_address(0x55557295f650) = 5836 set_robust_list(0x55557295f660, 24) = 0 rseq(0x55557295fca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor239605674", 4096) = 27 getrandom("\x91\xaa\x61\x68\xd7\x13\x2e\x44", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557295fd00 brk(0x555572980d00) = 0x555572980d00 brk(0x555572981000) = 0x555572981000 mprotect(0x7f9b74924000, 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, 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 [ 67.668546][ T5836] [ 67.671178][ T5836] ============================= [ 67.676337][ T5836] WARNING: suspicious RCU usage [ 67.681775][ T5836] 6.13.0-rc2-syzkaller-00059-g00a5acdbf398 #0 Not tainted [ 67.688917][ T5836] ----------------------------- [ 67.694063][ T5836] kernel/events/callchain.c:162 suspicious rcu_dereference_check() usage! [ 67.702835][ T5836] [ 67.702835][ T5836] other info that might help us debug this: [ 67.702835][ T5836] [ 67.713390][ T5836] [ 67.713390][ T5836] rcu_scheduler_active = 2, debug_locks = 1 [ 67.721600][ T5836] 1 lock held by syz-executor239/5836: [ 67.727081][ T5836] #0: ffffffff8e937fa0 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 67.737552][ T5836] [ 67.737552][ T5836] stack backtrace: [ 67.743642][ T5836] CPU: 1 UID: 0 PID: 5836 Comm: syz-executor239 Not tainted 6.13.0-rc2-syzkaller-00059-g00a5acdbf398 #0 [ 67.754743][ T5836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 [ 67.764835][ T5836] Call Trace: [ 67.768108][ T5836] [ 67.771031][ T5836] dump_stack_lvl+0x241/0x360 [ 67.775726][ T5836] ? __pfx_dump_stack_lvl+0x10/0x10 [ 67.780913][ T5836] ? __pfx__printk+0x10/0x10 [ 67.785512][ T5836] lockdep_rcu_suspicious+0x226/0x340 [ 67.790893][ T5836] get_callchain_entry+0x2b2/0x3c0 [ 67.796028][ T5836] get_perf_callchain+0xec/0x970 [ 67.800970][ T5836] ? __pfx_get_perf_callchain+0x10/0x10 [ 67.806522][ T5836] ? __lock_acquire+0x1397/0x2100 [ 67.811565][ T5836] __bpf_get_stack+0x41f/0xad0 [ 67.816338][ T5836] ? __pfx___bpf_get_stack+0x10/0x10 [ 67.821627][ T5836] ? __pfx_lock_acquire+0x10/0x10 [ 67.826649][ T5836] bpf_get_stack+0x33/0x50 [ 67.831071][ T5836] bpf_get_stack_raw_tp+0x1a3/0x240 [ 67.836275][ T5836] bpf_prog_b8a90dd1efcc4ad9+0x46/0x4a [ 67.841741][ T5836] bpf_prog_run_pin_on_cpu+0x67/0x150 [ 67.847117][ T5836] bpf_prog_test_run_syscall+0x316/0x4e0 [ 67.852754][ T5836] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 67.858913][ T5836] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 67.865067][ T5836] bpf_prog_test_run+0x2e4/0x360 [ 67.870009][ T5836] __sys_bpf+0x48d/0x810 [ 67.874262][ T5836] ? __pfx___sys_bpf+0x10/0x10 [ 67.879044][ T5836] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 67.885398][ T5836] ? do_syscall_64+0x100/0x230 [ 67.890186][ T5836] __x64_sys_bpf+0x7c/0x90 [ 67.894619][ T5836] do_syscall_64+0xf3/0x230 [ 67.899132][ T5836] ? clear_bhb_loop+0x35/0x90 [ 67.903835][ T5836] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 67.909747][ T5836] RIP: 0033:0x7f9b748b16a9 [ 67.914164][ T5836] 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 [ 67.934225][ T5836] RSP: 002b:00007ffc8d1a4818 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 67.942653][ T5836] RAX: ffffffffffffffda RBX: 00007ffc8d1a49e8 RCX: 00007f9b748b16a9 [ 67.950626][ T5836] RDX: 000000000000000c RSI: 00000000200004c0 RDI: 000000000000000a [ 67.958685][ T5836] RBP: 00007f9b74924610 R08: 00007ffc8d1a49e8 R09: 00007ffc8d1a49e8 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 +++ [ 67.966658][ T5836] R10: 00007ffc8d