rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2631 jiffies s: 183769 root: 0x2/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 27279 Comm: syz.6.6687 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:rcu_preempt_read_exit kernel/rcu/tree_plugin.h:384 [inline] RIP: 0010:__rcu_read_unlock+0x1b/0xd0 kernel/rcu/tree_plugin.h:423 Code: 03 38 c1 7c e3 48 89 df e8 52 47 66 00 eb d9 41 57 41 56 41 55 41 54 53 49 bf 00 00 00 00 00 fc ff df 65 48 8b 3d f5 34 95 7e <48> 8d 9f 3c 04 00 00 49 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 RSP: 0018:ffffc9000586ef90 EFLAGS: 00000093 RAX: ffffffff818c23f3 RBX: ffffffff818c1fcf RCX: ffff88802b2e0000 RDX: 0000000000000000 RSI: ffffffff8adf1300 RDI: ffff88802b2e0000 RBP: ffffc9000586f0b8 R08: dffffc0000000000 R09: 1ffffffff215f248 R10: dffffc0000000000 R11: fffffbfff215f249 R12: 0000000000120000 R13: 1ffff92000b0de04 R14: ffff88801d2ca6a8 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000c88e000 CR4: 00000000003506e0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_read_unlock include/linux/rcupdate.h:823 [inline] trace_call_bpf+0x5bb/0x6b0 kernel/trace/bpf_trace.c:137 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10027 perf_trace_preemptirq_template+0x268/0x320 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728 RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685 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 d2 33 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08 RSP: 0018:ffffc9000586f2e0 EFLAGS: 00000206 RAX: edc5192ba9430400 RBX: 1ffff92000b0de64 RCX: edc5192ba9430400 RDX: dffffc0000000000 RSI: ffffffff8a8c1120 RDI: ffffffff8adf1320 RBP: ffffc9000586f3d8 R08: ffffffff90af9247 R09: 1ffffffff215f248 R10: dffffc0000000000 R11: fffffbfff215f249 R12: 0000000000000246 R13: dffffc0000000000 R14: ffff8880b8f3b900 R15: 0000000000000002 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426 rcu_read_unlock include/linux/rcupdate.h:823 [inline] __folio_memcg_unlock+0xea/0x110 mm/memcontrol.c:2151 page_remove_rmap+0x7e3/0xea0 mm/rmap.c:1462 zap_pte_range mm/memory.c:1451 [inline] zap_pmd_range mm/memory.c:1572 [inline] zap_pud_range mm/memory.c:1601 [inline] zap_p4d_range mm/memory.c:1622 [inline] unmap_page_range+0x114a/0x2500 mm/memory.c:1643 unmap_vmas+0x260/0x390 mm/memory.c:1728 exit_mmap+0x20d/0x960 mm/mmap.c:3250 __mmput+0x118/0x3c0 kernel/fork.c:1205 exit_mm+0x1fe/0x2d0 kernel/exit.c:565 do_exit+0x905/0x2480 kernel/exit.c:867 do_group_exit+0x217/0x2d0 kernel/exit.c:1022 get_signal+0x1272/0x1350 kernel/signal.c:2871 arch_do_signal_or_restart+0xc4/0x1350 arch/x86/kernel/signal.c:871 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:288 RIP: 0033:0x7fe647f9dbc9 Code: Unable to access opcode bytes at 0x7fe647f9db9f. RSP: 002b:00007fe6461f61c0 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3 RAX: 0000000000000000 RBX: 00007fe647f59160 RCX: 00007fe647f9dbc9 RDX: 00007fe647f59160 RSI: 0000000000000058 RDI: 00007ffe86905930 RBP: 00007fe6461f66c0 R08: 00007fe6461f66c0 R09: 00007ffe86905a17 R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffe8 R13: 000000000000000b R14: 00007ffe86905930 R15: 00007ffe86905a18