./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor839834984 <...> Warning: Permanently added '10.128.10.53' (ED25519) to the list of known hosts. execve("./syz-executor839834984", ["./syz-executor839834984"], 0x7ffca370a900 /* 10 vars */) = 0 brk(NULL) = 0x55559308a000 brk(0x55559308ad00) = 0x55559308ad00 arch_prctl(ARCH_SET_FS, 0x55559308a380) = 0 set_tid_address(0x55559308a650) = 5091 set_robust_list(0x55559308a660, 24) = 0 rseq(0x55559308aca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor839834984", 4096) = 27 getrandom("\xe8\xb1\x2c\xb1\x66\xd0\x98\x51", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55559308ad00 brk(0x5555930abd00) = 0x5555930abd00 brk(0x5555930ac000) = 0x5555930ac000 mprotect(0x7f962d3c2000, 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|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 [ 61.193267][ T5091] [ 61.195925][ T5091] ============================= [ 61.201413][ T5091] WARNING: suspicious RCU usage [ 61.206868][ T5091] 6.10.0-rc5-syzkaller-01193-gac26327635d6 #0 Not tainted [ 61.214139][ T5091] ----------------------------- [ 61.219108][ T5091] kernel/events/callchain.c:161 suspicious rcu_dereference_check() usage! [ 61.227682][ T5091] [ 61.227682][ T5091] other info that might help us debug this: [ 61.227682][ T5091] [ 61.238554][ T5091] [ 61.238554][ T5091] rcu_scheduler_active = 2, debug_locks = 1 [ 61.246853][ T5091] 1 lock held by syz-executor839/5091: [ 61.252322][ T5091] #0: ffffffff8e334420 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 61.262593][ T5091] [ 61.262593][ T5091] stack backtrace: [ 61.268527][ T5091] CPU: 0 PID: 5091 Comm: syz-executor839 Not tainted 6.10.0-rc5-syzkaller-01193-gac26327635d6 #0 [ 61.279376][ T5091] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 [ 61.289521][ T5091] Call Trace: [ 61.292791][ T5091] [ 61.295717][ T5091] dump_stack_lvl+0x241/0x360 [ 61.300388][ T5091] ? __pfx_dump_stack_lvl+0x10/0x10 [ 61.305664][ T5091] ? __pfx__printk+0x10/0x10 [ 61.310790][ T5091] lockdep_rcu_suspicious+0x221/0x340 [ 61.316356][ T5091] get_callchain_entry+0x2b4/0x3c0 [ 61.321510][ T5091] get_perf_callchain+0xea/0x840 [ 61.326464][ T5091] ? mark_lock+0x9a/0x350 [ 61.330929][ T5091] ? __pfx_get_perf_callchain+0x10/0x10 [ 61.336486][ T5091] ? __lock_acquire+0x1346/0x1fd0 [ 61.341972][ T5091] __bpf_get_stack+0x3d4/0x5a0 [ 61.346743][ T5091] ? __pfx___bpf_get_stack+0x10/0x10 [ 61.352023][ T5091] ? __pfx_lock_acquire+0x10/0x10 [ 61.357141][ T5091] bpf_get_stack_raw_tp+0x1a3/0x240 [ 61.362377][ T5091] bpf_prog_b8a90dd1efcc4ad9+0x45/0x49 [ 61.367851][ T5091] bpf_prog_run_pin_on_cpu+0x67/0x150 [ 61.373230][ T5091] bpf_prog_test_run_syscall+0x316/0x4e0 [ 61.378894][ T5091] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 61.385077][ T5091] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 61.391234][ T5091] bpf_prog_test_run+0x33a/0x3b0 [ 61.396348][ T5091] __sys_bpf+0x48d/0x810 [ 61.400766][ T5091] ? __pfx___sys_bpf+0x10/0x10 [ 61.405541][ T5091] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 61.411861][ T5091] ? do_syscall_64+0x100/0x230 [ 61.416622][ T5091] __x64_sys_bpf+0x7c/0x90 [ 61.421037][ T5091] do_syscall_64+0xf3/0x230 [ 61.425635][ T5091] ? clear_bhb_loop+0x35/0x90 [ 61.430321][ T5091] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 61.436323][ T5091] RIP: 0033:0x7f962d34f669 [ 61.440851][ T5091] 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 [ 61.460474][ T5091] RSP: 002b:00007ffe59559018 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 61.470130][ T5091] RAX: ffffffffffffffda RBX: 00007ffe595591e8 RCX: 00007f962d34f669 [ 61.478188][ T5091] RDX: 000000000000000c RSI: 00000000200004c0 RDI: 000000000000000a [ 61.486325][ T5091] RBP: 00007f962d3c2610 R08: 00007ffe595591e8 R09: 00007ffe595591e8 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 +++ [ 61.494864][ T5091] R10: 00007ffe595591e8 R11: 0000000000000246 R12: 0000000000000001 [ 61.502826][ T5091] R13: 00007ffe595591d8 R14: 0000000000000001 R15: 0000000000000001 [ 61.510798][ T5091]