Warning: Permanently added '10.128.0.236' (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 [ 214.054742][ C1] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 214.061783][ C1] rcu: 0-....: (1 GPs behind) idle=c27/1/0x4000000000000002 softirq=5552/5553 fqs=5250 [ 214.072090][ C1] (detected by 1, t=10502 jiffies, g=6257, q=133) [ 214.078610][ C1] Sending NMI from CPU 1 to CPUs 0: [ 214.084017][ C0] NMI backtrace for cpu 0 [ 214.084027][ C0] CPU: 0 PID: 4327 Comm: syz-executor352 Not tainted syzkaller #0 [ 214.084042][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 214.084050][ C0] RIP: 0010:__sanitizer_cov_trace_pc+0x13/0x60 [ 214.084085][ C0] Code: 48 8b 3d 80 0c 12 0c 48 89 de 5b e9 47 6b 44 00 00 00 cc cc 00 00 cc 48 8b 04 24 65 48 8b 0d 14 5b 89 7e 65 8b 15 15 5b 89 7e <81> e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 34 16 00 00 [ 214.084096][ C0] RSP: 0018:ffffc90002e56a18 EFLAGS: 00000086 [ 214.084111][ C0] RAX: ffffffff8409dbca RBX: ffffffff8bfb159c RCX: ffff8880769b5940 [ 214.084122][ C0] RDX: 0000000000000002 RSI: ffffffff8bfb159c RDI: ffffc90002e56aa0 [ 214.084132][ C0] RBP: ffffffff8bfb159c R08: ffffffff8409dbb0 R09: 0000000000000000 [ 214.084142][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8bfb1578 [ 214.084151][ C0] R13: ffffc90002e56aa0 R14: ffffc90002e56aa0 R15: dffffc0000000000 [ 214.084162][ C0] FS: 00007f13902c26c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 [ 214.084175][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 214.084186][ C0] CR2: 0000000000000001 CR3: 000000007d758000 CR4: 00000000003506f0 [ 214.084201][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 214.084209][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 214.084219][ C0] Call Trace: [ 214.084223][ C0] [ 214.084228][ C0] cmp_ex_search+0x1a/0x70 [ 214.084247][ C0] bsearch+0x45/0xb0 [ 214.084261][ C0] ? search_extable+0xd0/0xd0 [ 214.084275][ C0] ? __get_user_nocheck_8+0x6/0x13 [ 214.084291][ C0] search_extable+0x8c/0xd0 [ 214.084306][ C0] ? trim_init_extable+0x3b0/0x3b0 [ 214.084321][ C0] ? __get_user_nocheck_8+0x6/0x13 [ 214.084335][ C0] ? rcu_lock_release+0x5/0x20 [ 214.084351][ C0] ? __lock_acquire+0x7b50/0x7b50 [ 214.084367][ C0] ? __get_user_nocheck_8+0x6/0x13 [ 214.084382][ C0] search_exception_tables+0x36/0x60 [ 214.084399][ C0] fixup_exception+0x4c/0x1560 [ 214.084421][ C0] kernelmode_fixup_or_oops+0x6c/0xd0 [ 214.084438][ C0] exc_page_fault+0x60/0x100 [ 214.084463][ C0] asm_exc_page_fault+0x22/0x30 [ 214.084477][ C0] RIP: 0010:__get_user_nocheck_8+0x6/0x13 [ 214.084492][ C0] Code: 01 ca c3 90 0f 01 cb 0f ae e8 0f b7 10 31 c0 0f 01 ca c3 90 0f 01 cb 0f ae e8 8b 10 31 c0 0f 01 ca c3 90 90 0f 01 cb 0f ae e8 <48> 8b 10 31 c0 0f 01 ca c3 90 0f 01 ca 31 d2 48 c7 c0 f2 ff ff ff [ 214.084503][ C0] RSP: 0018:ffffc90002e56cc0 EFLAGS: 00050093 [ 214.084515][ C0] RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffff8880769b5940 [ 214.084525][ C0] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007fffffffeff0 [ 214.084534][ C0] RBP: 0000000000000001 R08: ffffffff8d8b1eef R09: 1ffffffff1b163dd [ 214.084544][ C0] R10: dffffc0000000000 R11: fffffbfff1b163de R12: 00007fffffffeff0 [ 214.084554][ C0] R13: 00000000ffffffff R14: 0000000000000001 R15: 000000000000007f [ 214.084571][ C0] perf_callchain_user+0x423/0xf80 [ 214.084591][ C0] ? get_callchain_entry+0x181/0x3b0 [ 214.084607][ C0] get_perf_callchain+0x33d/0x460 [ 214.084622][ C0] ? put_callchain_entry+0xb0/0xb0 [ 214.084638][ C0] ? kvm_is_in_guest+0x24/0x30 [ 214.084656][ C0] perf_prepare_sample+0x352/0x1cb0 [ 214.084674][ C0] ? __lock_acquire+0x7b50/0x7b50 [ 214.084697][ C0] ? perf_callchain+0x190/0x190 [ 214.084711][ C0] ? rcu_lock_release+0x9/0x20 [ 214.084730][ C0] perf_event_output_forward+0x185/0x2e0 [ 214.084746][ C0] ? perf_get_page_size+0x430/0x430 [ 214.084762][ C0] ? tracing_gen_ctx_irq_test+0xb3/0x130 [ 214.084779][ C0] ? perf_trace_buf_update+0xa8/0x230 [ 214.084794][ C0] ? __perf_event_account_interrupt+0x187/0x280 [ 214.084811][ C0] __perf_event_overflow+0x35f/0x550 [ 214.084828][ C0] perf_tp_event+0x324/0xbe0 [ 214.084844][ C0] ? perf_trace_run_bpf_submit+0x1c0/0x1c0 [ 214.084859][ C0] ? perf_tp_event+0xa7e/0xbe0 [ 214.084883][ C0] ? trace_irq_enable_rcuidle+0x108/0x180 [ 214.084915][ C0] ? update_load_avg+0x4cc/0x11c0 [ 214.084934][ C0] perf_trace_run_bpf_submit+0xf3/0x1c0 [ 214.084952][ C0] perf_trace_preemptirq_template+0x2aa/0x360 [ 214.084968][ C0] ? asm_sysvec_irq_work+0x16/0x20 [ 214.084984][ C0] ? trace_event_raw_event_preemptirq_template+0x290/0x290 [ 214.085000][ C0] ? lockdep_hardirqs_on_prepare+0x448/0x7c0 [ 214.085017][ C0] ? lock_chain_count+0x20/0x20 [ 214.085034][ C0] ? asm_sysvec_irq_work+0x16/0x20 [ 214.085049][ C0] trace_irq_enable_rcuidle+0x108/0x180 [ 214.085072][ C0] trace_hardirqs_on+0x57/0x80 [ 214.085086][ C0] asm_sysvec_irq_work+0x16/0x20 [ 214.085100][ C0] RIP: 0010:rcu_read_unlock_special+0x7f/0x4a0 [ 214.085116][ C0] Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 42 0b 9d 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08 [ 214.085127][ C0] RSP: 0018:ffffc90002e57560 EFLAGS: 00000206 [ 214.085139][ C0] RAX: b46921c3b6f82700 RBX: 1ffff920005caeb0 RCX: b46921c3b6f82700 [ 214.085149][ C0] RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a7a48c0 [ 214.085159][ C0] RBP: ffffc90002e57630 R08: ffffffff901f10c7 R09: 1ffffffff203e218 [ 214.085170][ C0] R10: dffffc0000000000 R11: fffffbfff203e219 R12: ffffffff8c323400 [ 214.085180][ C0] R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 [ 214.085198][ C0] ? __rcu_read_unlock+0xd0/0xd0 [ 214.085216][ C0] ? __mod_lruvec_page_state+0x1fe/0x330 [ 214.085231][ C0] __rcu_read_unlock+0x78/0xd0 [ 214.085246][ C0] __unlock_page_memcg+0xea/0x100 [ 214.085260][ C0] unmap_page_range+0xee4/0x2410 [ 214.085289][ C0] unmap_vmas+0x131/0x250 [ 214.085304][ C0] ? unmap_page_range+0x2410/0x2410 [ 214.085316][ C0] ? __mutex_lock_common+0x435/0x2400 [ 214.085337][ C0] exit_mmap+0x3b9/0x640 [ 214.085353][ C0] ? vm_brk+0x20/0x20 [ 214.085373][ C0] ? uprobe_clear_state+0x2f6/0x460 [ 214.085387][ C0] ? rcu_is_watching+0x11/0xa0 [ 214.085402][ C0] __mmput+0x115/0x390 [ 214.085418][ C0] copy_process+0x2f76/0x3e70 [ 214.085441][ C0] ? local_lock_release+0x97/0x170 [ 214.085464][ C0] ? __pidfd_prepare+0x140/0x140 [ 214.085480][ C0] ? verify_lock_unused+0x140/0x140 [ 214.085499][ C0] kernel_clone+0x23f/0x990 [ 214.085515][ C0] ? create_io_thread+0x180/0x180 [ 214.085537][ C0] __x64_sys_clone+0x19a/0x210 [ 214.085553][ C0] ? __ia32_sys_vfork+0x130/0x130 [ 214.085574][ C0] ? lockdep_hardirqs_on+0x94/0x140 [ 214.085591][ C0] do_syscall_64+0x4c/0xa0 [ 214.085609][ C0] ? clear_bhb_loop+0x30/0x80 [ 214.085623][ C0] ? clear_bhb_loop+0x30/0x80 [ 214.085639][ C0] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 214.085654][ C0] RIP: 0033:0x7f13902e2029 [ 214.085668][ C0] Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 0f 1f 44 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 d0 ff ff ff f7 d8 64 89 01 48 [ 214.085679][ C0] RSP: 002b:00007f13902c2218 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 [ 214.085694][ C0] RAX: ffffffffffffffda RBX: 00007f1390392b28 RCX: 00007f13902e2029 [ 214.085704][ C0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000010eb22f000 [ 214.085713][ C0] RBP: 00007f1390392b20 R08: 0000000000000000 R09: 34203a6b63617473 [ 214.085722][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 81b77b31f5f2a54a [ 214.085731][ C0] R13: 0000200000000a80 R14: 0000200000000a40 R15: 00000010eb22f000 [ 214.085749][ C0] [ 214.085755][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.737 msecs [ 214.824879][ T4322] rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-... } 10580 jiffies s: 1297 root: 0x1/. [ 214.839057][ T4322] rcu: blocking rcu_node structures (internal RCU debug): [ 214.846443][ T4322] Task dump for CPU 0: [ 214.850532][ T4322] task:syz-executor352 state:R running task stack:24624 pid: 4327 ppid: 4208 flags:0x0000400a [ 214.861688][ T4322] Call Trace: [ 214.865032][ T4322] [ 214.867989][ T4322] ? __mod_lruvec_page_state+0x1fe/0x330 [ 214.873657][ T4322] ? __rcu_read_unlock+0x78/0xd0 [ 214.879002][ T4322] ? __unlock_page_memcg+0xea/0x100 [ 214.884234][ T4322] ? unmap_page_range+0xee4/0x2410 [ 214.889563][ T4322] ? unmap_vmas+0x131/0x250 [ 214.894098][ T4322] ? unmap_page_range+0x2410/0x2410 [ 214.899348][ T4322] ? __mutex_lock_common+0x435/0x2400 [ 214.904921][ T4322] ? exit_mmap+0x3b9/0x640 [ 214.909369][ T4322] ? vm_brk+0x20/0x20 [ 214.913386][ T4322] ? uprobe_clear_state+0x2f6/0x460 [ 214.918653][ T4322] ? rcu_is_watching+0x11/0xa0 [ 214.923448][ T4322] ? __mmput+0x115/0x390 [ 214.927757][ T4322] ? copy_process+0x2f76/0x3e70 [ 214.932650][ T4322] ? local_lock_release+0x97/0x170 [ 214.937819][ T4322] ? __pidfd_prepare+0x140/0x140 [ 214.942780][ T4322] ? verify_lock_unused+0x140/0x140 [ 214.948059][ T4322] ? kernel_clone+0x23f/0x990 [ 214.952769][ T4322] ? create_io_thread+0x180/0x180 [ 214.957866][ T4322] ? __x64_sys_clone+0x19a/0x210 [ 214.962930][ T4322] ? __ia32_sys_vfork+0x130/0x130 [ 214.968025][ T4322] ? lockdep_hardirqs_on+0x94/0x140 [ 214.973259][ T4322] ? do_syscall_64+0x4c/0xa0 [ 214.977923][ T4322] ? clear_bhb_loop+0x30/0x80 [ 214.982624][ T4322] ? clear_bhb_loop+0x30/0x80 [ 214.987366][ T4322] ? entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 214.993645][ T4322]