Warning: Permanently added '10.128.0.119' (ED25519) to the list of known hosts. executing program executing program [ 60.993123][ T3551] [ 60.995505][ T3551] ====================================================== [ 61.002527][ T3551] WARNING: possible circular locking dependency detected [ 61.009542][ T3551] 6.1.90-syzkaller #0 Not tainted [ 61.014565][ T3551] ------------------------------------------------------ [ 61.021595][ T3551] syz-executor127/3551 is trying to acquire lock: [ 61.028017][ T3551] ffff8880771f40d8 (&sighand->siglock){....}-{2:2}, at: __lock_task_sighand+0x145/0x2d0 [ 61.037812][ T3551] [ 61.037812][ T3551] but task is already holding lock: [ 61.045175][ T3551] ffff8880b9835e90 (lock#9){+.+.}-{2:2}, at: __mmap_lock_do_trace_acquire_returned+0x84/0x670 [ 61.055461][ T3551] [ 61.055461][ T3551] which lock already depends on the new lock. [ 61.055461][ T3551] [ 61.065861][ T3551] [ 61.065861][ T3551] the existing dependency chain (in reverse order) is: [ 61.074871][ T3551] [ 61.074871][ T3551] -> #3 (lock#9){+.+.}-{2:2}: [ 61.081756][ T3551] lock_acquire+0x1f8/0x5a0 [ 61.086793][ T3551] __mmap_lock_do_trace_acquire_returned+0x9d/0x670 [ 61.093905][ T3551] stack_map_get_build_id_offset+0x99e/0x9c0 [ 61.100416][ T3551] __bpf_get_stack+0x495/0x570 [ 61.105710][ T3551] bpf_get_stack_raw_tp+0x1b2/0x220 [ 61.111433][ T3551] bpf_prog_ec3b2eefa702d8d3+0x3a/0x3e [ 61.117416][ T3551] bpf_trace_run2+0x1fd/0x410 [ 61.122633][ T3551] trace_tlb_flush+0x151/0x1a0 [ 61.127948][ T3551] switch_mm_irqs_off+0x84a/0xc20 [ 61.133502][ T3551] __schedule+0x1140/0x4550 [ 61.138561][ T3551] preempt_schedule_common+0x83/0xd0 [ 61.144379][ T3551] preempt_schedule+0xd9/0xe0 [ 61.149594][ T3551] preempt_schedule_thunk+0x16/0x18 [ 61.155324][ T3551] _raw_spin_unlock+0x36/0x40 [ 61.160529][ T3551] __text_poke+0x81a/0x9a0 [ 61.165475][ T3551] text_poke_bp_batch+0x153/0x940 [ 61.171030][ T3551] text_poke_finish+0x16/0x30 [ 61.176237][ T3551] arch_jump_label_transform_apply+0x13/0x20 [ 61.182752][ T3551] static_key_enable_cpuslocked+0x12e/0x250 [ 61.189178][ T3551] static_key_enable+0x16/0x20 [ 61.194470][ T3551] tracepoint_add_func+0x947/0x9d0 [ 61.200127][ T3551] tracepoint_probe_register_prio_may_exist+0x11e/0x190 [ 61.207608][ T3551] bpf_raw_tp_link_attach+0x456/0x6b0 [ 61.213507][ T3551] bpf_raw_tracepoint_open+0x196/0x210 [ 61.219500][ T3551] __sys_bpf+0x4a7/0x6c0 [ 61.224273][ T3551] __x64_sys_bpf+0x78/0x90 [ 61.229226][ T3551] do_syscall_64+0x3b/0xb0 [ 61.234175][ T3551] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 61.240632][ T3551] [ 61.240632][ T3551] -> #2 (&rq->__lock){-.-.}-{2:2}: [ 61.247941][ T3551] lock_acquire+0x1f8/0x5a0 [ 61.252978][ T3551] _raw_spin_lock_nested+0x2d/0x40 [ 61.258618][ T3551] raw_spin_rq_lock_nested+0x26/0x140 [ 61.264520][ T3551] task_fork_fair+0x5d/0x350 [ 61.269649][ T3551] sched_cgroup_fork+0x374/0x400 [ 61.275117][ T3551] copy_process+0x2442/0x4060 [ 61.280318][ T3551] kernel_clone+0x222/0x920 [ 61.285355][ T3551] user_mode_thread+0x12e/0x190 [ 61.290729][ T3551] rest_init+0x23/0x300 [ 61.295411][ T3551] start_kernel+0x0/0x53f [ 61.300273][ T3551] start_kernel+0x496/0x53f [ 61.305309][ T3551] secondary_startup_64_no_verify+0xcf/0xdb [ 61.311735][ T3551] [ 61.311735][ T3551] -> #1 (&p->pi_lock){-.-.}-{2:2}: [ 61.319042][ T3551] lock_acquire+0x1f8/0x5a0 [ 61.324097][ T3551] _raw_spin_lock_irqsave+0xd1/0x120 [ 61.329909][ T3551] try_to_wake_up+0xad/0x12e0 [ 61.335125][ T3551] complete_signal+0x796/0xbd0 [ 61.340428][ T3551] __send_signal_locked+0xb1a/0xdc0 [ 61.346157][ T3551] do_notify_parent+0xe2b/0x1100 [ 61.351633][ T3551] do_exit+0x172e/0x26a0 [ 61.356407][ T3551] do_group_exit+0x202/0x2b0 [ 61.361532][ T3551] __x64_sys_exit_group+0x3b/0x40 [ 61.367103][ T3551] do_syscall_64+0x3b/0xb0 [ 61.372055][ T3551] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 61.378483][ T3551] [ 61.378483][ T3551] -> #0 (&sighand->siglock){....}-{2:2}: [ 61.386335][ T3551] validate_chain+0x1661/0x5950 [ 61.391730][ T3551] __lock_acquire+0x125b/0x1f80 [ 61.397112][ T3551] lock_acquire+0x1f8/0x5a0 [ 61.402170][ T3551] _raw_spin_lock_irqsave+0xd1/0x120 [ 61.408002][ T3551] __lock_task_sighand+0x145/0x2d0 [ 61.413661][ T3551] group_send_sig_info+0x26c/0x300 [ 61.419319][ T3551] bpf_send_signal_common+0x2d8/0x420 [ 61.425321][ T3551] bpf_send_signal_thread+0x12/0x20 [ 61.431063][ T3551] bpf_prog_7bb747c56a8bcba8+0x15/0x1d [ 61.437049][ T3551] bpf_trace_run4+0x253/0x470 [ 61.442260][ T3551] __mmap_lock_do_trace_acquire_returned+0x5e3/0x670 [ 61.449475][ T3551] lock_mm_and_find_vma+0x219/0x2e0 [ 61.455374][ T3551] exc_page_fault+0x169/0x660 [ 61.461098][ T3551] asm_exc_page_fault+0x22/0x30 [ 61.466490][ T3551] [ 61.466490][ T3551] other info that might help us debug this: [ 61.466490][ T3551] [ 61.476718][ T3551] Chain exists of: [ 61.476718][ T3551] &sighand->siglock --> &rq->__lock --> lock#9 [ 61.476718][ T3551] [ 61.490287][ T3551] Possible unsafe locking scenario: [ 61.490287][ T3551] [ 61.497840][ T3551] CPU0 CPU1 [ 61.503205][ T3551] ---- ---- [ 61.508568][ T3551] lock(lock#9); [ 61.512328][ T3551] lock(&rq->__lock); [ 61.518921][ T3551] lock(lock#9); [ 61.525087][ T3551] lock(&sighand->siglock); [ 61.529680][ T3551] [ 61.529680][ T3551] *** DEADLOCK *** [ 61.529680][ T3551] [ 61.537823][ T3551] 5 locks held by syz-executor127/3551: [ 61.543366][ T3551] #0: ffff888013ffbd58 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x2e/0x2e0 [ 61.553305][ T3551] #1: ffff8880b9835e90 (lock#9){+.+.}-{2:2}, at: __mmap_lock_do_trace_acquire_returned+0x84/0x670 [ 61.564027][ T3551] #2: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: get_mm_memcg_path+0xb1/0x600 [ 61.573623][ T3551] #3: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x16a/0x470 [ 61.583037][ T3551] #4: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: __lock_task_sighand+0x25/0x2d0 [ 61.592803][ T3551] [ 61.592803][ T3551] stack backtrace: [ 61.598692][ T3551] CPU: 0 PID: 3551 Comm: syz-executor127 Not tainted 6.1.90-syzkaller #0 [ 61.607192][ T3551] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 61.617252][ T3551] Call Trace: [ 61.620552][ T3551] [ 61.623492][ T3551] dump_stack_lvl+0x1e3/0x2cb [ 61.628186][ T3551] ? nf_tcp_handle_invalid+0x642/0x642 [ 61.633689][ T3551] ? print_circular_bug+0x12b/0x1a0 [ 61.638919][ T3551] check_noncircular+0x2fa/0x3b0 [ 61.643863][ T3551] ? add_chain_block+0x850/0x850 [ 61.648818][ T3551] ? lockdep_lock+0x11f/0x2a0 [ 61.653508][ T3551] ? noop_count+0x30/0x30 [ 61.657854][ T3551] ? mark_lock+0x9a/0x340 [ 61.662200][ T3551] ? _find_first_zero_bit+0xd0/0x100 [ 61.667501][ T3551] validate_chain+0x1661/0x5950 [ 61.672374][ T3551] ? lockdep_unlock+0x165/0x300 [ 61.677235][ T3551] ? reacquire_held_locks+0x660/0x660 [ 61.682630][ T3551] ? __bfs+0x359/0x6e0 [ 61.686713][ T3551] ? validate_chain+0x13ce/0x5950 [ 61.691755][ T3551] ? reacquire_held_locks+0x660/0x660 [ 61.697149][ T3551] ? reacquire_held_locks+0x660/0x660 [ 61.702541][ T3551] ? mark_lock+0x9a/0x340 [ 61.706888][ T3551] __lock_acquire+0x125b/0x1f80 [ 61.711786][ T3551] lock_acquire+0x1f8/0x5a0 [ 61.716302][ T3551] ? __lock_task_sighand+0x145/0x2d0 [ 61.721604][ T3551] ? read_lock_is_recursive+0x10/0x10 [ 61.726992][ T3551] ? read_lock_is_recursive+0x10/0x10 [ 61.732382][ T3551] ? _raw_spin_lock_irqsave+0xac/0x120 [ 61.737878][ T3551] _raw_spin_lock_irqsave+0xd1/0x120 [ 61.743173][ T3551] ? __lock_task_sighand+0x145/0x2d0 [ 61.748487][ T3551] ? _raw_spin_lock+0x40/0x40 [ 61.753177][ T3551] __lock_task_sighand+0x145/0x2d0 [ 61.758302][ T3551] ? __lock_task_sighand+0x25/0x2d0 [ 61.763516][ T3551] group_send_sig_info+0x26c/0x300 [ 61.768668][ T3551] ? lockdep_assert_task_sighand_held+0x2b0/0x2b0 [ 61.775188][ T3551] bpf_send_signal_common+0x2d8/0x420 [ 61.780571][ T3551] ? trace_bpf_trace_printk+0x250/0x250 [ 61.786126][ T3551] ? kernfs_path_from_node+0x234/0xb00 [ 61.791625][ T3551] ? bpf_trace_run4+0x16a/0x470 [ 61.796490][ T3551] bpf_send_signal_thread+0x12/0x20 [ 61.801695][ T3551] bpf_prog_7bb747c56a8bcba8+0x15/0x1d [ 61.807159][ T3551] bpf_trace_run4+0x253/0x470 [ 61.811930][ T3551] ? asm_exc_int3+0x35/0x40 [ 61.816447][ T3551] ? bpf_trace_run3+0x440/0x440 [ 61.821309][ T3551] ? __mmap_lock_do_trace_acquire_returned+0x501/0x670 [ 61.828169][ T3551] __mmap_lock_do_trace_acquire_returned+0x5e3/0x670 [ 61.834864][ T3551] ? __mmap_lock_do_trace_acquire_returned+0x84/0x670 [ 61.841633][ T3551] lock_mm_and_find_vma+0x219/0x2e0 [ 61.846849][ T3551] exc_page_fault+0x169/0x660 [ 61.851542][ T3551] asm_exc_page_fault+0x22/0x30 [ 61.856407][ T3551] RIP: 0033:0x7fefcd90d79a [ 61.860827][ T3551] Code: 48 8d 3d ab a8 07 00 31 c0 e8 72 07 00 00 ba 12 00 00 00 bf 01 00 00 00 48 8d 35 ac a8 07 00 e8 3c 0a 03 00 31 c0 31 c9 31 d2 <89> 04 25 c4 00 00 20 31 f6 66 0f ef c0 bf 41 01 00 00 89 04 25 c8 [ 61.880442][ T3551] RSP: 002b:00007ffd7d5a2890 EFLAGS: 00010246 [ 61.886514][ T3551] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 executing program executing program [ 61.894497][ T3551] RDX: 0000000000000000 RSI: 00007fefcd98803b RDI: 0000000000000001 [ 61.902474][ T3551] RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000 [ 61.910478][ T3551] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 61.918504][ T3551] R13: 00007ffd7d5a2aa8 R14: 00007ffd7d5a28b0 R15: 00007ffd7d5a28a0 [ 61.926516][ T3551] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program