./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor854853148 <...> Warning: Permanently added '10.128.1.137' (ED25519) to the list of known hosts. execve("./syz-executor854853148", ["./syz-executor854853148"], 0x7ffe4b0035d0 /* 10 vars */) = 0 brk(NULL) = 0x55557108b000 brk(0x55557108bd00) = 0x55557108bd00 arch_prctl(ARCH_SET_FS, 0x55557108b380) = 0 set_tid_address(0x55557108b650) = 5847 set_robust_list(0x55557108b660, 24) = 0 rseq(0x55557108bca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor854853148", 4096) = 27 getrandom("\x21\x30\xd2\xb1\x65\x75\xc0\x15", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557108bd00 brk(0x5555710acd00) = 0x5555710acd00 brk(0x5555710ad000) = 0x5555710ad000 mprotect(0x7f2f985b8000, 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 [ 62.529302][ T5847] [ 62.531909][ T5847] ============================= [ 62.536869][ T5847] WARNING: suspicious RCU usage [ 62.541728][ T5847] 6.12.0-syzkaller-09092-gbd74e238ae69 #0 Not tainted [ 62.548520][ T5847] ----------------------------- [ 62.553397][ T5847] kernel/events/callchain.c:162 suspicious rcu_dereference_check() usage! [ 62.561878][ T5847] [ 62.561878][ T5847] other info that might help us debug this: [ 62.561878][ T5847] [ 62.572182][ T5847] [ 62.572182][ T5847] rcu_scheduler_active = 2, debug_locks = 1 [ 62.580294][ T5847] 1 lock held by syz-executor854/5847: [ 62.585821][ T5847] #0: ffffffff8e93c9e0 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 62.596114][ T5847] [ 62.596114][ T5847] stack backtrace: [ 62.602030][ T5847] CPU: 0 UID: 0 PID: 5847 Comm: syz-executor854 Not tainted 6.12.0-syzkaller-09092-gbd74e238ae69 #0 [ 62.612789][ T5847] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 62.622849][ T5847] Call Trace: [ 62.626127][ T5847] [ 62.629052][ T5847] dump_stack_lvl+0x241/0x360 [ 62.633740][ T5847] ? __pfx_dump_stack_lvl+0x10/0x10 [ 62.638939][ T5847] ? __pfx__printk+0x10/0x10 [ 62.643538][ T5847] lockdep_rcu_suspicious+0x226/0x340 [ 62.648911][ T5847] get_callchain_entry+0x2b2/0x3c0 [ 62.654023][ T5847] get_perf_callchain+0xec/0x970 [ 62.658961][ T5847] ? __pfx_get_perf_callchain+0x10/0x10 [ 62.664504][ T5847] ? __lock_acquire+0x1397/0x2100 [ 62.669525][ T5847] __bpf_get_stack+0x41f/0xad0 [ 62.674292][ T5847] ? __pfx___bpf_get_stack+0x10/0x10 [ 62.679601][ T5847] ? __pfx_lock_acquire+0x10/0x10 [ 62.684619][ T5847] bpf_get_stack+0x33/0x50 [ 62.689030][ T5847] bpf_get_stack_raw_tp+0x1a3/0x240 [ 62.694231][ T5847] bpf_prog_b8a90dd1efcc4ad9+0x46/0x4a [ 62.699689][ T5847] bpf_prog_run_pin_on_cpu+0x67/0x150 [ 62.705061][ T5847] bpf_prog_test_run_syscall+0x316/0x4e0 [ 62.710692][ T5847] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 62.716848][ T5847] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 62.722997][ T5847] bpf_prog_test_run+0x2e4/0x360 [ 62.727932][ T5847] __sys_bpf+0x48d/0x810 [ 62.732165][ T5847] ? __pfx___sys_bpf+0x10/0x10 [ 62.736935][ T5847] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 62.743253][ T5847] ? do_syscall_64+0x100/0x230 [ 62.748014][ T5847] __x64_sys_bpf+0x7c/0x90 [ 62.752425][ T5847] do_syscall_64+0xf3/0x230 [ 62.756930][ T5847] ? clear_bhb_loop+0x35/0x90 [ 62.761603][ T5847] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 62.767493][ T5847] RIP: 0033:0x7f2f985456a9 [ 62.771924][ T5847] 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 [ 62.791531][ T5847] RSP: 002b:00007ffd2e3c0f78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 62.799959][ T5847] RAX: ffffffffffffffda RBX: 00007ffd2e3c1148 RCX: 00007f2f985456a9 [ 62.807921][ T5847] RDX: 000000000000000c RSI: 00000000200004c0 RDI: 000000000000000a [ 62.815883][ T5847] RBP: 00007f2f985b8610 R08: 00007ffd2e3c1148 R09: 00007ffd2e3c1148 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 +++ [ 62.823848][ T5847] R10: 00007ffd2e3c1148 R11: 0000000000000246 R12: 0000000