./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4048454615 <...> Warning: Permanently added '10.128.1.109' (ED25519) to the list of known hosts. execve("./syz-executor4048454615", ["./syz-executor4048454615"], 0x7ffdadd87d60 /* 10 vars */) = 0 brk(NULL) = 0x55557e378000 brk(0x55557e378d00) = 0x55557e378d00 arch_prctl(ARCH_SET_FS, 0x55557e378380) = 0 set_tid_address(0x55557e378650) = 5088 set_robust_list(0x55557e378660, 24) = 0 rseq(0x55557e378ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4048454615", 4096) = 28 getrandom("\x24\x00\xec\x52\x79\xa1\x8d\xbf", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557e378d00 brk(0x55557e399d00) = 0x55557e399d00 brk(0x55557e39a000) = 0x55557e39a000 mprotect(0x7f6070400000, 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 [ 76.977628][ T5088] [ 76.980122][ T5088] ============================= [ 76.984968][ T5088] WARNING: suspicious RCU usage [ 76.989950][ T5088] 6.9.0-rc6-syzkaller-00130-ga26ff37e624d #0 Not tainted [ 76.997037][ T5088] ----------------------------- [ 77.001928][ T5088] kernel/events/callchain.c:161 suspicious rcu_dereference_check() usage! [ 77.010515][ T5088] [ 77.010515][ T5088] other info that might help us debug this: [ 77.010515][ T5088] [ 77.020805][ T5088] [ 77.020805][ T5088] rcu_scheduler_active = 2, debug_locks = 1 [ 77.028953][ T5088] 1 lock held by syz-executor404/5088: [ 77.034433][ T5088] #0: ffffffff8e335240 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 77.044783][ T5088] [ 77.044783][ T5088] stack backtrace: [ 77.050743][ T5088] CPU: 0 PID: 5088 Comm: syz-executor404 Not tainted 6.9.0-rc6-syzkaller-00130-ga26ff37e624d #0 [ 77.061188][ T5088] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 77.071263][ T5088] Call Trace: [ 77.074556][ T5088] [ 77.077501][ T5088] dump_stack_lvl+0x241/0x360 [ 77.082226][ T5088] ? __pfx_dump_stack_lvl+0x10/0x10 [ 77.087443][ T5088] ? __pfx__printk+0x10/0x10 [ 77.092060][ T5088] lockdep_rcu_suspicious+0x221/0x340 [ 77.097630][ T5088] get_callchain_entry+0x2b4/0x3c0 [ 77.102759][ T5088] get_perf_callchain+0xea/0x840 [ 77.107723][ T5088] ? __pfx_get_perf_callchain+0x10/0x10 [ 77.113296][ T5088] __bpf_get_stack+0x3d4/0x5a0 [ 77.118091][ T5088] ? __pfx___bpf_get_stack+0x10/0x10 [ 77.123395][ T5088] ? __pfx___cant_migrate+0x10/0x10 [ 77.128613][ T5088] bpf_get_stack_raw_tp+0x1a3/0x240 [ 77.133828][ T5088] bpf_prog_b8a90dd1efcc4ad9+0x45/0x49 [ 77.139297][ T5088] bpf_prog_run_pin_on_cpu+0x66/0x150 [ 77.144713][ T5088] bpf_prog_test_run_syscall+0x316/0x4e0 [ 77.150500][ T5088] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 77.156694][ T5088] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 77.162880][ T5088] bpf_prog_test_run+0x33a/0x3b0 [ 77.167847][ T5088] __sys_bpf+0x48d/0x810 [ 77.172119][ T5088] ? __pfx___sys_bpf+0x10/0x10 [ 77.176915][ T5088] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 77.183252][ T5088] ? do_syscall_64+0x102/0x240 [ 77.188038][ T5088] __x64_sys_bpf+0x7c/0x90 [ 77.192466][ T5088] do_syscall_64+0xf5/0x240 [ 77.197009][ T5088] ? clear_bhb_loop+0x35/0x90 [ 77.201701][ T5088] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 77.207606][ T5088] RIP: 0033:0x7f607038d669 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) = ? [ 77.212029][ T5088] 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 [ 77.231640][ T5088] RSP: 002b:00007ffdb0484d48 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 77.240069][ T5088] RAX: ffffffffffffffda RBX: 00007ffdb0484f18 RCX: 00007f607038d669 [ 77.248049][ T5088] RDX: 000000000000000c RSI: 00000000200004c0 RDI: 000000000000000a [ 77.256024][ T5088] RBP: 00007f6070400610 R08: 00007ffdb0484f18 R09: 00007ffdb0484f18 [ 77.264089][ T5088] R10: 00007ffdb0484f18 R11: 0000000000000246 R12: 0000000000000001 +++ exited with 0 +++ [ 77.272068][ T5088] R13: 00007ffdb0484f08 R14: 0000000000000001 R15: 0000000000