Warning: Permanently added '10.128.10.24' (ED25519) to the list of known hosts. executing program executing program executing program executing program [ 45.348008][ T3509] [ 45.350359][ T3509] ====================================================== [ 45.357358][ T3509] WARNING: possible circular locking dependency detected [ 45.364352][ T3509] 5.15.158-syzkaller #0 Not tainted [ 45.369529][ T3509] ------------------------------------------------------ [ 45.376520][ T3509] syz-executor157/3509 is trying to acquire lock: [ 45.382909][ T3509] ffff8880237a65d8 (&sighand->siglock){-...}-{2:2}, at: __lock_task_sighand+0x11a/0x290 [ 45.392646][ T3509] [ 45.392646][ T3509] but task is already holding lock: [ 45.399984][ T3509] ffff8880b9b35bb8 (lock#8){+.+.}-{2:2}, at: local_lock_acquire+0xd/0x170 [ 45.408488][ T3509] [ 45.408488][ T3509] which lock already depends on the new lock. [ 45.408488][ T3509] [ 45.418869][ T3509] [ 45.418869][ T3509] the existing dependency chain (in reverse order) is: [ 45.427857][ T3509] [ 45.427857][ T3509] -> #3 (lock#8){+.+.}-{2:2}: [ 45.434701][ T3509] lock_acquire+0x1db/0x4f0 [ 45.439704][ T3509] local_lock_acquire+0x29/0x170 [ 45.445140][ T3509] __mmap_lock_do_trace_acquire_returned+0x7c/0x340 [ 45.452228][ T3509] stack_map_get_build_id_offset+0x612/0x930 [ 45.458720][ T3509] __bpf_get_stack+0x495/0x570 [ 45.463982][ T3509] bpf_get_stack_raw_tp+0x1b2/0x220 [ 45.469683][ T3509] bpf_prog_ec3b2eefa702d8d3+0x3a/0x7cc [ 45.475727][ T3509] bpf_trace_run2+0x19e/0x340 [ 45.480902][ T3509] trace_tlb_flush+0xed/0x110 [ 45.486077][ T3509] switch_mm_irqs_off+0x748/0xa30 [ 45.491599][ T3509] __schedule+0x1167/0x45b0 [ 45.496603][ T3509] preempt_schedule_common+0x83/0xd0 [ 45.502387][ T3509] preempt_schedule+0xd9/0xe0 [ 45.507563][ T3509] preempt_schedule_thunk+0x16/0x18 [ 45.513263][ T3509] _raw_spin_unlock+0x36/0x40 [ 45.518439][ T3509] __text_poke+0x871/0x9e0 [ 45.523360][ T3509] text_poke_bp_batch+0x14c/0x930 [ 45.528885][ T3509] text_poke_finish+0x16/0x30 [ 45.534061][ T3509] arch_jump_label_transform_apply+0x13/0x20 [ 45.540544][ T3509] static_key_enable_cpuslocked+0x12e/0x250 [ 45.546943][ T3509] static_key_enable+0x16/0x20 [ 45.552204][ T3509] tracepoint_add_func+0x947/0x9d0 [ 45.557813][ T3509] tracepoint_probe_register_prio_may_exist+0x11e/0x190 [ 45.565247][ T3509] bpf_raw_tracepoint_open+0x65a/0x750 [ 45.571206][ T3509] __sys_bpf+0x468/0x670 [ 45.575950][ T3509] __x64_sys_bpf+0x78/0x90 [ 45.580868][ T3509] do_syscall_64+0x3b/0xb0 [ 45.585782][ T3509] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 45.592178][ T3509] [ 45.592178][ T3509] -> #2 (&rq->__lock){-.-.}-{2:2}: [ 45.599456][ T3509] lock_acquire+0x1db/0x4f0 [ 45.604460][ T3509] _raw_spin_lock_nested+0x2d/0x40 [ 45.610070][ T3509] raw_spin_rq_lock_nested+0x26/0x140 [ 45.615942][ T3509] task_fork_fair+0x5d/0x350 [ 45.621030][ T3509] sched_cgroup_fork+0x2d3/0x330 [ 45.626470][ T3509] copy_process+0x224a/0x3ef0 [ 45.631646][ T3509] kernel_clone+0x210/0x960 [ 45.636648][ T3509] kernel_thread+0x168/0x1e0 [ 45.641737][ T3509] rest_init+0x21/0x330 [ 45.646394][ T3509] start_kernel+0x48c/0x540 [ 45.651395][ T3509] secondary_startup_64_no_verify+0xb1/0xbb [ 45.657788][ T3509] [ 45.657788][ T3509] -> #1 (&p->pi_lock){-.-.}-{2:2}: [ 45.665062][ T3509] lock_acquire+0x1db/0x4f0 [ 45.670065][ T3509] _raw_spin_lock_irqsave+0xd1/0x120 [ 45.675850][ T3509] try_to_wake_up+0xae/0x1300 [ 45.681027][ T3509] complete_signal+0x5a0/0x9a0 [ 45.686290][ T3509] __send_signal+0xaaf/0xd40 [ 45.691385][ T3509] do_notify_parent+0xc1e/0xf00 [ 45.696737][ T3509] do_exit+0x1464/0x2480 [ 45.701480][ T3509] do_group_exit+0x144/0x310 [ 45.706571][ T3509] __x64_sys_exit_group+0x3b/0x40 [ 45.712098][ T3509] do_syscall_64+0x3b/0xb0 [ 45.717017][ T3509] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 45.723407][ T3509] [ 45.723407][ T3509] -> #0 (&sighand->siglock){-...}-{2:2}: [ 45.731205][ T3509] validate_chain+0x1649/0x5930 [ 45.736689][ T3509] __lock_acquire+0x1295/0x1ff0 [ 45.742064][ T3509] lock_acquire+0x1db/0x4f0 [ 45.747079][ T3509] _raw_spin_lock_irqsave+0xd1/0x120 [ 45.752880][ T3509] __lock_task_sighand+0x11a/0x290 [ 45.758496][ T3509] group_send_sig_info+0x23f/0x2d0 [ 45.764107][ T3509] bpf_send_signal_common+0x2d8/0x420 [ 45.769980][ T3509] bpf_send_signal+0x15/0x20 [ 45.775078][ T3509] bpf_prog_da8cbe553dc44a71+0x1a/0xfb4 [ 45.781124][ T3509] bpf_trace_run4+0x1ea/0x390 [ 45.786308][ T3509] __mmap_lock_do_trace_acquire_returned+0x2d6/0x340 [ 45.793482][ T3509] exc_page_fault+0x59c/0x740 [ 45.798672][ T3509] asm_exc_page_fault+0x22/0x30 [ 45.804023][ T3509] __put_user_nocheck_4+0x3/0x11 [ 45.809461][ T3509] schedule_tail+0x92/0xb0 [ 45.814377][ T3509] ret_from_fork+0x8/0x30 [ 45.819207][ T3509] [ 45.819207][ T3509] other info that might help us debug this: [ 45.819207][ T3509] [ 45.829411][ T3509] Chain exists of: [ 45.829411][ T3509] &sighand->siglock --> &rq->__lock --> lock#8 [ 45.829411][ T3509] [ 45.841473][ T3509] Possible unsafe locking scenario: [ 45.841473][ T3509] [ 45.848899][ T3509] CPU0 CPU1 [ 45.854240][ T3509] ---- ---- [ 45.859581][ T3509] lock(lock#8); [ 45.863202][ T3509] lock(&rq->__lock); [ 45.869769][ T3509] lock(lock#8); [ 45.875905][ T3509] lock(&sighand->siglock); [ 45.880478][ T3509] [ 45.880478][ T3509] *** DEADLOCK *** [ 45.880478][ T3509] [ 45.888597][ T3509] 5 locks held by syz-executor157/3509: [ 45.894119][ T3509] #0: ffff888023a69628 (&mm->mmap_lock){++++}-{3:3}, at: exc_page_fault+0x181/0x740 [ 45.903580][ T3509] #1: ffff8880b9b35bb8 (lock#8){+.+.}-{2:2}, at: local_lock_acquire+0xd/0x170 [ 45.912519][ T3509] #2: ffffffff8c91fae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 45.921802][ T3509] #3: ffffffff8c91fae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 45.931083][ T3509] #4: ffffffff8c91fae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x30 [ 45.940367][ T3509] [ 45.940367][ T3509] stack backtrace: [ 45.946230][ T3509] CPU: 1 PID: 3509 Comm: syz-executor157 Not tainted 5.15.158-syzkaller #0 [ 45.954792][ T3509] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 45.964828][ T3509] Call Trace: [ 45.968090][ T3509] [ 45.971001][ T3509] dump_stack_lvl+0x1e3/0x2d0 [ 45.975660][ T3509] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 45.981278][ T3509] ? print_circular_bug+0x12b/0x1a0 [ 45.986465][ T3509] check_noncircular+0x2f8/0x3b0 [ 45.991400][ T3509] ? add_chain_block+0x850/0x850 [ 45.996338][ T3509] ? lockdep_lock+0x11f/0x2a0 [ 46.001003][ T3509] validate_chain+0x1649/0x5930 [ 46.005851][ T3509] ? reacquire_held_locks+0x660/0x660 [ 46.011217][ T3509] ? validate_chain+0x112/0x5930 [ 46.016157][ T3509] ? reacquire_held_locks+0x660/0x660 [ 46.021520][ T3509] ? reacquire_held_locks+0x660/0x660 [ 46.026876][ T3509] ? mark_lock+0x98/0x340 [ 46.031188][ T3509] __lock_acquire+0x1295/0x1ff0 [ 46.036029][ T3509] lock_acquire+0x1db/0x4f0 [ 46.040518][ T3509] ? __lock_task_sighand+0x11a/0x290 [ 46.045791][ T3509] ? read_lock_is_recursive+0x10/0x10 [ 46.051153][ T3509] ? read_lock_is_recursive+0x10/0x10 [ 46.056509][ T3509] ? _raw_spin_lock_irqsave+0xac/0x120 [ 46.061951][ T3509] ? lockdep_hardirqs_off+0x70/0x100 [ 46.067218][ T3509] _raw_spin_lock_irqsave+0xd1/0x120 [ 46.072484][ T3509] ? __lock_task_sighand+0x11a/0x290 [ 46.077752][ T3509] ? _raw_spin_lock+0x40/0x40 [ 46.082410][ T3509] ? __lock_acquire+0x1295/0x1ff0 [ 46.087416][ T3509] __lock_task_sighand+0x11a/0x290 [ 46.092511][ T3509] group_send_sig_info+0x23f/0x2d0 [ 46.097604][ T3509] ? lockdep_assert_task_sighand_held+0x280/0x280 [ 46.104000][ T3509] ? read_lock_is_recursive+0x10/0x10 [ 46.109356][ T3509] bpf_send_signal_common+0x2d8/0x420 [ 46.114708][ T3509] ? rcu_lock_release+0x20/0x20 [ 46.119539][ T3509] ? kernfs_path_from_node+0x234/0xb00 [ 46.124981][ T3509] bpf_send_signal+0x15/0x20 [ 46.129552][ T3509] bpf_prog_da8cbe553dc44a71+0x1a/0xfb4 [ 46.135086][ T3509] bpf_trace_run4+0x1ea/0x390 [ 46.139742][ T3509] ? asm_exc_int3+0x35/0x40 [ 46.144224][ T3509] ? bpf_trace_run3+0x380/0x380 [ 46.149055][ T3509] ? __mmap_lock_do_trace_acquire_returned+0x21a/0x340 [ 46.155887][ T3509] __mmap_lock_do_trace_acquire_returned+0x2d6/0x340 [ 46.162548][ T3509] exc_page_fault+0x59c/0x740 [ 46.167297][ T3509] ? __lock_acquire+0x1ff0/0x1ff0 [ 46.172299][ T3509] asm_exc_page_fault+0x22/0x30 [ 46.177131][ T3509] RIP: 0010:__put_user_nocheck_4+0x3/0x11 [ 46.182835][ T3509] Code: 00 00 48 39 d9 73 54 0f 01 cb 66 89 01 31 c9 0f 01 ca c3 0f 1f 44 00 00 48 bb fd ef ff ff ff 7f 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 [ 46.202424][ T3509] RSP: 0018:ffffc90002d37f28 EFLAGS: 00050297 [ 46.208472][ T3509] RAX: 0000000000000db5 RBX: 00007fffffffeffd RCX: 0000555556914650 [ 46.216424][ T3509] RDX: 0000000000000000 RSI: ffffffff8a8b3c20 RDI: ffffffff8ad8f600 [ 46.224377][ T3509] RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1bc8c56 [ 46.232327][ T3509] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807993c220 [ 46.240276][ T3509] R13: 0000000000000000 R14: ffff88807993bb80 R15: dffffc0000000000 [ 46.248232][ T3509] schedule_tail+0x92/0xb0 [ 46.252633][ T3509] ret_from_fork+0x8/0x30 [ 46.256946][ T3509] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program