Warning: Permanently added '10.128.0.146' (ED25519) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 45.094069][ T3661] [ 45.096424][ T3661] ====================================================== [ 45.103520][ T3661] WARNING: possible circular locking dependency detected [ 45.110525][ T3661] 5.15.164-syzkaller #0 Not tainted [ 45.115706][ T3661] ------------------------------------------------------ [ 45.122697][ T3661] syz-executor330/3661 is trying to acquire lock: [ 45.129083][ T3661] ffff88813fe227e8 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xae/0x1300 [ 45.137894][ T3661] [ 45.137894][ T3661] but task is already holding lock: [ 45.145231][ T3661] ffff8880b9a35bb8 (lock#8){+.+.}-{2:2}, at: local_lock_acquire+0xd/0x170 [ 45.153735][ T3661] [ 45.153735][ T3661] which lock already depends on the new lock. [ 45.153735][ T3661] [ 45.164300][ T3661] [ 45.164300][ T3661] the existing dependency chain (in reverse order) is: [ 45.173289][ T3661] [ 45.173289][ T3661] -> #2 (lock#8){+.+.}-{2:2}: [ 45.180220][ T3661] lock_acquire+0x1db/0x4f0 [ 45.185226][ T3661] local_lock_acquire+0x29/0x170 [ 45.190682][ T3661] __mmap_lock_do_trace_acquire_returned+0x7c/0x340 [ 45.197765][ T3661] stack_map_get_build_id_offset+0x612/0x930 [ 45.204241][ T3661] __bpf_get_stack+0x495/0x570 [ 45.209502][ T3661] bpf_get_stack_raw_tp+0x1b2/0x220 [ 45.215201][ T3661] 0xffffffffa0014c2a [ 45.219709][ T3661] bpf_trace_run2+0x19e/0x340 [ 45.225041][ T3661] trace_tlb_flush+0xed/0x110 [ 45.230320][ T3661] switch_mm_irqs_off+0x748/0xa30 [ 45.235849][ T3661] __schedule+0x1167/0x45b0 [ 45.240863][ T3661] schedule+0x11b/0x1f0 [ 45.245513][ T3661] schedule_hrtimeout_range_clock+0x2b3/0x4a0 [ 45.252076][ T3661] poll_schedule_timeout+0x10c/0x150 [ 45.257859][ T3661] do_sys_poll+0xd61/0x11f0 [ 45.262868][ T3661] __se_sys_ppoll+0x29c/0x330 [ 45.268046][ T3661] do_syscall_64+0x3b/0xb0 [ 45.272963][ T3661] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 45.279358][ T3661] [ 45.279358][ T3661] -> #1 (&rq->__lock){-.-.}-{2:2}: [ 45.286628][ T3661] lock_acquire+0x1db/0x4f0 [ 45.291631][ T3661] _raw_spin_lock_nested+0x2d/0x40 [ 45.297243][ T3661] raw_spin_rq_lock_nested+0x26/0x140 [ 45.303115][ T3661] task_fork_fair+0x5d/0x350 [ 45.308209][ T3661] sched_cgroup_fork+0x2d3/0x330 [ 45.313661][ T3661] copy_process+0x224a/0x3ef0 [ 45.318837][ T3661] kernel_clone+0x210/0x960 [ 45.323840][ T3661] kernel_thread+0x168/0x1e0 [ 45.328926][ T3661] rest_init+0x21/0x330 [ 45.333584][ T3661] start_kernel+0x48c/0x540 [ 45.338592][ T3661] secondary_startup_64_no_verify+0xb1/0xbb [ 45.344988][ T3661] [ 45.344988][ T3661] -> #0 (&p->pi_lock){-.-.}-{2:2}: [ 45.352271][ T3661] validate_chain+0x1649/0x5930 [ 45.357631][ T3661] __lock_acquire+0x1295/0x1ff0 [ 45.362978][ T3661] lock_acquire+0x1db/0x4f0 [ 45.367978][ T3661] _raw_spin_lock_irqsave+0xd1/0x120 [ 45.373760][ T3661] try_to_wake_up+0xae/0x1300 [ 45.378941][ T3661] rcu_read_unlock_special+0x3aa/0x520 [ 45.384901][ T3661] __rcu_read_unlock+0x92/0x100 [ 45.390258][ T3661] get_mem_cgroup_from_mm+0x179/0x260 [ 45.396128][ T3661] get_mm_memcg_path+0x1b/0x550 [ 45.401479][ T3661] __mmap_lock_do_trace_acquire_returned+0x84/0x340 [ 45.408569][ T3661] acct_collect+0x772/0x7a0 [ 45.413686][ T3661] do_exit+0x5a2/0x2480 [ 45.418359][ T3661] do_group_exit+0x144/0x310 [ 45.423460][ T3661] __x64_sys_exit_group+0x3b/0x40 [ 45.428987][ T3661] do_syscall_64+0x3b/0xb0 [ 45.433904][ T3661] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 45.440299][ T3661] [ 45.440299][ T3661] other info that might help us debug this: [ 45.440299][ T3661] [ 45.450504][ T3661] Chain exists of: [ 45.450504][ T3661] &p->pi_lock --> &rq->__lock --> lock#8 [ 45.450504][ T3661] [ 45.462044][ T3661] Possible unsafe locking scenario: [ 45.462044][ T3661] [ 45.469470][ T3661] CPU0 CPU1 [ 45.474897][ T3661] ---- ---- [ 45.480238][ T3661] lock(lock#8); [ 45.484116][ T3661] lock(&rq->__lock); [ 45.490682][ T3661] lock(lock#8); [ 45.496817][ T3661] lock(&p->pi_lock); [ 45.500864][ T3661] [ 45.500864][ T3661] *** DEADLOCK *** [ 45.500864][ T3661] [ 45.509066][ T3661] 3 locks held by syz-executor330/3661: [ 45.514586][ T3661] #0: ffff888078380828 (&mm->mmap_lock){++++}-{3:3}, at: acct_collect+0x15c/0x7a0 [ 45.523875][ T3661] #1: ffff8880b9a35bb8 (lock#8){+.+.}-{2:2}, at: local_lock_acquire+0xd/0x170 [ 45.532811][ T3661] #2: ffffffff8c91fb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 [ 45.542106][ T3661] [ 45.542106][ T3661] stack backtrace: [ 45.548099][ T3661] CPU: 0 PID: 3661 Comm: syz-executor330 Not tainted 5.15.164-syzkaller #0 [ 45.556665][ T3661] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 [ 45.566710][ T3661] Call Trace: [ 45.570068][ T3661] [ 45.572979][ T3661] dump_stack_lvl+0x1e3/0x2d0 [ 45.577640][ T3661] ? io_uring_drop_tctx_refs+0x1a0/0x1a0 [ 45.583255][ T3661] ? print_circular_bug+0x12b/0x1a0 [ 45.588433][ T3661] check_noncircular+0x2f8/0x3b0 [ 45.593445][ T3661] ? add_chain_block+0x850/0x850 [ 45.598379][ T3661] ? lockdep_lock+0x11f/0x2a0 [ 45.603079][ T3661] validate_chain+0x1649/0x5930 [ 45.607917][ T3661] ? irq_work_queue+0xc6/0x150 [ 45.612773][ T3661] ? stack_map_get_build_id_offset+0x581/0x930 [ 45.619130][ T3661] ? reacquire_held_locks+0x660/0x660 [ 45.624507][ T3661] ? validate_chain+0x112/0x5930 [ 45.629636][ T3661] ? __bpf_get_stackid+0x910/0x910 [ 45.634748][ T3661] ? validate_chain+0x112/0x5930 [ 45.639837][ T3661] ? reacquire_held_locks+0x660/0x660 [ 45.645397][ T3661] ? mark_lock+0x98/0x340 [ 45.649727][ T3661] __lock_acquire+0x1295/0x1ff0 [ 45.654800][ T3661] lock_acquire+0x1db/0x4f0 [ 45.659302][ T3661] ? try_to_wake_up+0xae/0x1300 [ 45.664151][ T3661] ? read_lock_is_recursive+0x10/0x10 [ 45.669520][ T3661] ? reacquire_held_locks+0x660/0x660 [ 45.674877][ T3661] ? mark_lock+0x98/0x340 [ 45.679237][ T3661] _raw_spin_lock_irqsave+0xd1/0x120 [ 45.684515][ T3661] ? try_to_wake_up+0xae/0x1300 [ 45.689355][ T3661] ? _raw_spin_lock+0x40/0x40 [ 45.694011][ T3661] ? mark_lock+0x98/0x340 [ 45.698409][ T3661] try_to_wake_up+0xae/0x1300 [ 45.703073][ T3661] ? try_invoke_on_locked_down_task+0x450/0x450 [ 45.709300][ T3661] rcu_read_unlock_special+0x3aa/0x520 [ 45.714743][ T3661] ? __rcu_read_unlock+0x100/0x100 [ 45.719922][ T3661] ? rcu_read_lock_sched_held+0x89/0x130 [ 45.725547][ T3661] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 45.731525][ T3661] __rcu_read_unlock+0x92/0x100 [ 45.736360][ T3661] get_mem_cgroup_from_mm+0x179/0x260 [ 45.741723][ T3661] get_mm_memcg_path+0x1b/0x550 [ 45.746558][ T3661] __mmap_lock_do_trace_acquire_returned+0x84/0x340 [ 45.753137][ T3661] ? acct_collect+0x763/0x7a0 [ 45.757806][ T3661] acct_collect+0x772/0x7a0 [ 45.762299][ T3661] ? acct_exit_ns+0xc0/0xc0 [ 45.766943][ T3661] ? rcu_is_watching+0x11/0xa0 [ 45.771711][ T3661] ? hrtimer_try_to_cancel+0x3c9/0x410 [ 45.777165][ T3661] do_exit+0x5a2/0x2480 [ 45.781315][ T3661] ? put_task_struct+0x80/0x80 [ 45.786059][ T3661] ? lockdep_hardirqs_on_prepare+0x438/0x7a0 [ 45.792017][ T3661] ? vtime_user_exit+0x2d1/0x400 [ 45.796940][ T3661] do_group_exit+0x144/0x310 [ 45.801515][ T3661] __x64_sys_exit_group+0x3b/0x40 [ 45.806610][ T3661] do_syscall_64+0x3b/0xb0 [ 45.811011][ T3661] ? clear_bhb_loop+0x15/0x70 [ 45.815671][ T3661] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 45.821557][ T3661] RIP: 0033:0x7f84b99a3439 [ 45.825959][ T3661] Code: 90 49 c7 c0 b8 ff ff ff be e7 00 00 00 ba 3c 00 00 00 eb 12 0f 1f 44 00 00 89 d0 0f 05 48 3d 00 f0 ff ff 77 1c f4 89 f0 0f 05 <48> 3d 00 f0 ff ff 76 e7 f7 d8 64 41 89 00 eb df 0f 1f 80 00 00 00 executing program executing program executing program executing program [ 45.845551][ T3661] RSP: 002b:00007fff523d3888 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.854046][ T3661] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f84b99a3439 [ 45.862020][ T3661] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 45.870244][ T3661] RBP: 00007f84b9a1e2d0 R08: ffffffffffffffb8 R09: 00000000000000a0 [ 45.878205][ T3661] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f84b9a1e2d0 [ 45.886169][ T3661] R13: 0000000000000000 R14: 00007f84b9a1ed40 R15: 00007f84b99745e0 [ 45.894332][ T3661] executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program