./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor370143896 <...> Warning: Permanently added '10.128.0.172' (ED25519) to the list of known hosts. execve("./syz-executor370143896", ["./syz-executor370143896"], 0x7ffded0d0c40 /* 10 vars */) = 0 brk(NULL) = 0x5555929ba000 brk(0x5555929bad00) = 0x5555929bad00 arch_prctl(ARCH_SET_FS, 0x5555929ba380) = 0 set_tid_address(0x5555929ba650) = 5230 set_robust_list(0x5555929ba660, 24) = 0 rseq(0x5555929baca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor370143896", 4096) = 27 getrandom("\xfe\xcb\xee\xf5\xed\xb4\x8a\x06", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555929bad00 brk(0x5555929dbd00) = 0x5555929dbd00 brk(0x5555929dc000) = 0x5555929dc000 mprotect(0x7fa6ac495000, 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 write(1, "executing program\n", 18executing program ) = 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 [ 74.883874][ T5230] [ 74.886552][ T5230] ============================= [ 74.891609][ T5230] WARNING: suspicious RCU usage [ 74.896488][ T5230] 6.11.0-syzkaller-01458-g9410645520e9 #0 Not tainted [ 74.903340][ T5230] ----------------------------- [ 74.908263][ T5230] kernel/events/callchain.c:162 suspicious rcu_dereference_check() usage! [ 74.916835][ T5230] [ 74.916835][ T5230] other info that might help us debug this: [ 74.916835][ T5230] [ 74.927150][ T5230] [ 74.927150][ T5230] rcu_scheduler_active = 2, debug_locks = 1 [ 74.935224][ T5230] 1 lock held by syz-executor370/5230: [ 74.940788][ T5230] #0: ffffffff8e9387e0 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80 [ 74.951147][ T5230] [ 74.951147][ T5230] stack backtrace: [ 74.957157][ T5230] CPU: 1 UID: 0 PID: 5230 Comm: syz-executor370 Not tainted 6.11.0-syzkaller-01458-g9410645520e9 #0 [ 74.967939][ T5230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 [ 74.978002][ T5230] Call Trace: [ 74.981296][ T5230] [ 74.984240][ T5230] dump_stack_lvl+0x241/0x360 [ 74.988957][ T5230] ? __pfx_dump_stack_lvl+0x10/0x10 [ 74.994163][ T5230] ? __pfx__printk+0x10/0x10 [ 74.998768][ T5230] lockdep_rcu_suspicious+0x221/0x340 [ 75.004150][ T5230] get_callchain_entry+0x2b2/0x3c0 [ 75.009270][ T5230] get_perf_callchain+0xec/0x970 [ 75.014217][ T5230] ? __pfx_lock_acquire+0x10/0x10 [ 75.019247][ T5230] ? __pfx_get_perf_callchain+0x10/0x10 [ 75.024798][ T5230] ? __lock_acquire+0x137a/0x2040 [ 75.029923][ T5230] __bpf_get_stack+0x3d4/0x5a0 [ 75.034691][ T5230] ? __pfx___bpf_get_stack+0x10/0x10 [ 75.039976][ T5230] ? __pfx_lock_acquire+0x10/0x10 [ 75.045093][ T5230] bpf_get_stack_raw_tp+0x1a3/0x240 [ 75.050295][ T5230] bpf_prog_b8a90dd1efcc4ad9+0x45/0x49 [ 75.055764][ T5230] bpf_prog_run_pin_on_cpu+0x67/0x150 [ 75.061150][ T5230] bpf_prog_test_run_syscall+0x316/0x4e0 [ 75.066804][ T5230] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 75.072993][ T5230] ? __pfx_bpf_prog_test_run_syscall+0x10/0x10 [ 75.079162][ T5230] bpf_prog_test_run+0x33a/0x3b0 [ 75.084116][ T5230] __sys_bpf+0x48d/0x810 [ 75.088371][ T5230] ? __pfx___sys_bpf+0x10/0x10 [ 75.093160][ T5230] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 75.099502][ T5230] ? do_syscall_64+0x100/0x230 [ 75.104287][ T5230] __x64_sys_bpf+0x7c/0x90 [ 75.108817][ T5230] do_syscall_64+0xf3/0x230 [ 75.113337][ T5230] ? clear_bhb_loop+0x35/0x90 [ 75.118032][ T5230] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.123948][ T5230] RIP: 0033:0x7fa6ac4226a9 [ 75.128374][ T5230] 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 [ 75.148083][ T5230] RSP: 002b:00007ffcf77a5518 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 75.156523][ T5230] RAX: ffffffffffffffda RBX: 00007ffcf77a56e8 RCX: 00007fa6ac4226a9 [ 75.164509][ T5230] RDX: 000000000000000c RSI: 00000000200004c0 RDI: 000000000000000a [ 75.172497][ T5230] RBP: 00007fa6ac495610 R08: 00007ffcf77a56e8 R09: 00007ffcf77a56e8 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 +++ [ 75.180482][ T5230] R10: 00007ffcf77a56e8 R11: 00000000