Warning: Permanently added '10.128.0.208' (ED25519) to the list of known hosts. executing program executing program executing program [ 53.401437][ T3567] [ 53.403793][ T3567] ====================================================== [ 53.410944][ T3567] WARNING: possible circular locking dependency detected [ 53.418118][ T3567] 5.15.163-syzkaller #0 Not tainted [ 53.423308][ T3567] ------------------------------------------------------ [ 53.430314][ T3567] syz-executor296/3567 is trying to acquire lock: [ 53.436713][ T3567] ffff888023930958 (&sighand->siglock){....}-{2:2}, at: __lock_task_sighand+0x11a/0x290 [ 53.446471][ T3567] [ 53.446471][ T3567] but task is already holding lock: [ 53.453822][ T3567] ffff8880b9a35bb8 (lock#8){+.+.}-{2:2}, at: local_lock_acquire+0xd/0x170 [ 53.462357][ T3567] [ 53.462357][ T3567] which lock already depends on the new lock. [ 53.462357][ T3567] [ 53.472746][ T3567] [ 53.472746][ T3567] the existing dependency chain (in reverse order) is: [ 53.481746][ T3567] [ 53.481746][ T3567] -> #3 (lock#8){+.+.}-{2:2}: [ 53.488610][ T3567] lock_acquire+0x1db/0x4f0 [ 53.493628][ T3567] local_lock_acquire+0x29/0x170 [ 53.499082][ T3567] __mmap_lock_do_trace_acquire_returned+0x7c/0x340 [ 53.506187][ T3567] stack_map_get_build_id_offset+0x612/0x930 [ 53.512777][ T3567] __bpf_get_stack+0x495/0x570 [ 53.518055][ T3567] bpf_get_stack_raw_tp+0x1b2/0x220 [ 53.523792][ T3567] bpf_prog_ec3b2eefa702d8d3+0x3a/0xa98 [ 53.529852][ T3567] bpf_trace_run2+0x19e/0x340 [ 53.535039][ T3567] trace_tlb_flush+0xed/0x110 [ 53.540225][ T3567] switch_mm_irqs_off+0x748/0xa30 [ 53.545760][ T3567] __schedule+0x1167/0x45b0 [ 53.550791][ T3567] preempt_schedule_common+0x83/0xd0 [ 53.556588][ T3567] preempt_schedule+0xd9/0xe0 [ 53.561777][ T3567] preempt_schedule_thunk+0x16/0x18 [ 53.567495][ T3567] _raw_spin_unlock+0x36/0x40 [ 53.572682][ T3567] __text_poke+0x871/0x9e0 [ 53.577613][ T3567] text_poke_bp_batch+0x14c/0x930 [ 53.583150][ T3567] text_poke_finish+0x16/0x30 [ 53.588339][ T3567] arch_jump_label_transform_apply+0x13/0x20 [ 53.594831][ T3567] static_key_enable_cpuslocked+0x12e/0x250 [ 53.601319][ T3567] static_key_enable+0x16/0x20 [ 53.606594][ T3567] tracepoint_add_func+0x947/0x9d0 [ 53.612217][ T3567] tracepoint_probe_register_prio_may_exist+0x11e/0x190 [ 53.619663][ T3567] bpf_raw_tracepoint_open+0x65a/0x750 [ 53.625629][ T3567] __sys_bpf+0x468/0x670 [ 53.630383][ T3567] __x64_sys_bpf+0x78/0x90 [ 53.635311][ T3567] do_syscall_64+0x3b/0xb0 [ 53.640322][ T3567] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 53.646728][ T3567] [ 53.646728][ T3567] -> #2 (&rq->__lock){-.-.}-{2:2}: [ 53.654013][ T3567] lock_acquire+0x1db/0x4f0 [ 53.659026][ T3567] _raw_spin_lock_nested+0x2d/0x40 [ 53.664654][ T3567] raw_spin_rq_lock_nested+0x26/0x140 [ 53.670642][ T3567] task_fork_fair+0x5d/0x350 [ 53.675757][ T3567] sched_cgroup_fork+0x2d3/0x330 [ 53.681228][ T3567] copy_process+0x224a/0x3ef0 [ 53.686415][ T3567] kernel_clone+0x210/0x960 [ 53.691428][ T3567] kernel_thread+0x168/0x1e0 [ 53.696526][ T3567] rest_init+0x21/0x330 [ 53.701193][ T3567] start_kernel+0x48c/0x540 [ 53.706494][ T3567] secondary_startup_64_no_verify+0xb1/0xbb [ 53.712911][ T3567] [ 53.712911][ T3567] -> #1 (&p->pi_lock){-.-.}-{2:2}: [ 53.720201][ T3567] lock_acquire+0x1db/0x4f0 [ 53.725215][ T3567] _raw_spin_lock_irqsave+0xd1/0x120 [ 53.731011][ T3567] try_to_wake_up+0xae/0x1300 [ 53.736201][ T3567] complete_signal+0x5a0/0x9a0 [ 53.741475][ T3567] __send_signal+0xaaf/0xd40 [ 53.746576][ T3567] do_notify_parent+0xc1e/0xf00 [ 53.751933][ T3567] do_exit+0x1464/0x2480 [ 53.756686][ T3567] do_group_exit+0x144/0x310 [ 53.761798][ T3567] __x64_sys_exit_group+0x3b/0x40 [ 53.767338][ T3567] do_syscall_64+0x3b/0xb0 [ 53.772264][ T3567] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 53.778680][ T3567] [ 53.778680][ T3567] -> #0 (&sighand->siglock){....}-{2:2}: [ 53.786490][ T3567] validate_chain+0x1649/0x5930 [ 53.791852][ T3567] __lock_acquire+0x1295/0x1ff0 [ 53.797230][ T3567] lock_acquire+0x1db/0x4f0 [ 53.802242][ T3567] _raw_spin_lock_irqsave+0xd1/0x120 [ 53.808039][ T3567] __lock_task_sighand+0x11a/0x290 [ 53.813662][ T3567] group_send_sig_info+0x23f/0x2d0 [ 53.819371][ T3567] bpf_send_signal_common+0x2d8/0x420 [ 53.825252][ T3567] bpf_send_signal+0x15/0x20 [ 53.830348][ T3567] bpf_prog_180da154f9623d02+0x1c/0xdbc [ 53.836402][ T3567] bpf_trace_run4+0x1ea/0x390 [ 53.841587][ T3567] __mmap_lock_do_trace_acquire_returned+0x2d6/0x340 [ 53.848844][ T3567] exc_page_fault+0x564/0x700 [ 53.854045][ T3567] asm_exc_page_fault+0x22/0x30 [ 53.859521][ T3567] __put_user_nocheck_8+0x3/0x21 [ 53.864981][ T3567] __rseq_handle_notify_resume+0x605/0x1250 [ 53.871397][ T3567] exit_to_user_mode_loop+0xdc/0x130 [ 53.877201][ T3567] exit_to_user_mode_prepare+0xb1/0x140 [ 53.883268][ T3567] syscall_exit_to_user_mode+0x5d/0x240 [ 53.889324][ T3567] do_syscall_64+0x47/0xb0 [ 53.894249][ T3567] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 53.900656][ T3567] [ 53.900656][ T3567] other info that might help us debug this: [ 53.900656][ T3567] [ 53.910874][ T3567] Chain exists of: [ 53.910874][ T3567] &sighand->siglock --> &rq->__lock --> lock#8 [ 53.910874][ T3567] [ 53.922953][ T3567] Possible unsafe locking scenario: [ 53.922953][ T3567] [ 53.930390][ T3567] CPU0 CPU1 [ 53.935737][ T3567] ---- ---- [ 53.941180][ T3567] lock(lock#8); [ 53.944876][ T3567] lock(&rq->__lock); [ 53.951458][ T3567] lock(lock#8); [ 53.957617][ T3567] lock(&sighand->siglock); [ 53.962190][ T3567] [ 53.962190][ T3567] *** DEADLOCK *** [ 53.962190][ T3567] [ 53.970314][ T3567] 5 locks held by syz-executor296/3567: [ 53.975841][ T3567] #0: ffff888073567828 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x181/0x700 [ 53.985318][ T3567] #1: ffff8880b9a35bb8 (lock#8){+.+.}-{2:2}, at: local_lock_acquire+0xd/0x170 [ 53.994273][ T3567] #2: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 54.003571][ T3567] #3: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 54.012866][ T3567] #4: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 54.022166][ T3567] [ 54.022166][ T3567] stack backtrace: [ 54.028076][ T3567] CPU: 0 PID: 3567 Comm: syz-executor296 Not tainted 5.15.163-syzkaller #0 [ 54.036651][ T3567] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 54.046700][ T3567] Call Trace: [ 54.049972][ T3567] [ 54.052906][ T3567] dump_stack_lvl+0x1e3/0x2d0 [ 54.057575][ T3567] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 54.063216][ T3567] ? print_circular_bug+0x12b/0x1a0 [ 54.068407][ T3567] check_noncircular+0x2f8/0x3b0 [ 54.073336][ T3567] ? add_chain_block+0x850/0x850 [ 54.078257][ T3567] ? lockdep_lock+0x11f/0x2a0 [ 54.082940][ T3567] ? noop_count+0x30/0x30 [ 54.087256][ T3567] ? validate_chain+0x112/0x5930 [ 54.092185][ T3567] validate_chain+0x1649/0x5930 [ 54.097029][ T3567] ? check_noncircular+0x1e1/0x3b0 [ 54.102140][ T3567] ? reacquire_held_locks+0x660/0x660 [ 54.107502][ T3567] ? validate_chain+0x13bd/0x5930 [ 54.112514][ T3567] ? reacquire_held_locks+0x660/0x660 [ 54.117877][ T3567] ? reacquire_held_locks+0x660/0x660 [ 54.123241][ T3567] ? mark_lock+0x98/0x340 [ 54.127558][ T3567] __lock_acquire+0x1295/0x1ff0 [ 54.132398][ T3567] lock_acquire+0x1db/0x4f0 [ 54.136886][ T3567] ? __lock_task_sighand+0x11a/0x290 [ 54.142168][ T3567] ? read_lock_is_recursive+0x10/0x10 [ 54.147543][ T3567] ? read_lock_is_recursive+0x10/0x10 [ 54.152904][ T3567] ? _raw_spin_lock_irqsave+0xac/0x120 [ 54.158357][ T3567] ? lockdep_hardirqs_off+0x70/0x100 [ 54.163633][ T3567] _raw_spin_lock_irqsave+0xd1/0x120 [ 54.168929][ T3567] ? __lock_task_sighand+0x11a/0x290 [ 54.174205][ T3567] ? _raw_spin_lock+0x40/0x40 [ 54.178873][ T3567] ? __lock_acquire+0x1295/0x1ff0 [ 54.183891][ T3567] __lock_task_sighand+0x11a/0x290 [ 54.189008][ T3567] group_send_sig_info+0x23f/0x2d0 [ 54.194136][ T3567] ? lockdep_assert_task_sighand_held+0x280/0x280 [ 54.200556][ T3567] ? read_lock_is_recursive+0x10/0x10 [ 54.205942][ T3567] bpf_send_signal_common+0x2d8/0x420 [ 54.211310][ T3567] ? rcu_lock_release+0x20/0x20 [ 54.216170][ T3567] ? kernfs_path_from_node+0x234/0xb00 [ 54.221620][ T3567] bpf_send_signal+0x15/0x20 [ 54.226317][ T3567] bpf_prog_180da154f9623d02+0x1c/0xdbc [ 54.231869][ T3567] bpf_trace_run4+0x1ea/0x390 [ 54.236556][ T3567] ? bpf_trace_run3+0x380/0x380 [ 54.241424][ T3567] ? __mmap_lock_do_trace_acquire_returned+0x21a/0x340 [ 54.248269][ T3567] __mmap_lock_do_trace_acquire_returned+0x2d6/0x340 [ 54.255055][ T3567] exc_page_fault+0x564/0x700 [ 54.259735][ T3567] asm_exc_page_fault+0x22/0x30 [ 54.264594][ T3567] RIP: 0010:__put_user_nocheck_8+0x3/0x21 [ 54.270310][ T3567] Code: 00 00 48 39 d9 73 34 0f 01 cb 89 01 31 c9 0f 01 ca c3 66 0f 1f 44 00 00 48 bb f9 ef ff ff ff 7f 00 00 48 39 d9 73 14 0f 01 cb <48> 89 01 31 c9 0f 01 ca c3 0f 1f 44 00 00 0f 01 ca b9 f2 ff ff ff [ 54.289993][ T3567] RSP: 0018:ffffc900025b7d78 EFLAGS: 00050297 [ 54.296051][ T3567] RAX: 0000000000000000 RBX: 00007fffffffeff9 RCX: 0000555556905ca8 [ 54.304016][ T3567] RDX: 0000000000000000 RSI: ffffffff8a8b3ca0 RDI: ffffffff8ad8f780 [ 54.311987][ T3567] RBP: ffffc900025b7eb8 R08: dffffc0000000000 R09: fffffbfff1bd296e [ 54.319953][ T3567] R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900025b7e28 [ 54.327924][ T3567] R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920004b6fc6 [ 54.335903][ T3567] __rseq_handle_notify_resume+0x605/0x1250 [ 54.341817][ T3567] ? __bpf_trace_rseq_ip_fixup+0x40/0x40 [ 54.347447][ T3567] ? __se_sys_clock_nanosleep+0x323/0x3b0 [ 54.353160][ T3567] ? blkcg_maybe_throttle_current+0x110/0x6d0 [ 54.359220][ T3567] exit_to_user_mode_loop+0xdc/0x130 [ 54.364504][ T3567] exit_to_user_mode_prepare+0xb1/0x140 [ 54.370128][ T3567] syscall_exit_to_user_mode+0x5d/0x240 [ 54.375671][ T3567] do_syscall_64+0x47/0xb0 [ 54.380079][ T3567] ? clear_bhb_loop+0x15/0x70 [ 54.384757][ T3567] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 54.390805][ T3567] RIP: 0033:0x7f98ad691703 [ 54.395221][ T3567] Code: 00 00 00 00 00 66 90 83 ff 03 74 7b 83 ff 02 b8 fa ff ff ff 49 89 ca 0f 44 f8 80 3d 7e 09 05 00 00 74 14 b8 e6 00 00 00 0f 05 d8 c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 54 24 10 [ 54.414925][ T3567] RSP: 002b:00007fff329ad168 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6 [ 54.423346][ T3567] RAX: 0000000000000000 RBX: 0000000000000df2 RCX: 00007f98ad691703 [ 54.431313][ T3567] RDX: 00007fff329ad180 RSI: 0000000000000000 RDI: 0000000000000000 [ 54.439282][ T3567] RBP: 00000000000f4240 R08: 00007fff329bc0b0 R09: 0000000000000010 [ 54.447421][ T3567] R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000d06d executing program executing program executing program [ 54.455384][ T3567] R13: 00007fff329ad1bc R14: 00007fff329ad1d0 R15: 00007fff329ad1c0 [ 54.463530][ T3567] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program