rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P15152 0-.... } 2680 jiffies s: 56377 root: 0x1/T rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 15468 Comm: syz-executor182 Not tainted 6.1.0-syzkaller-13420-g72a85e2b0a1e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline] RIP: 0010:write_comp_data kernel/kcov.c:236 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x33/0xa0 kernel/kcov.c:304 Code: 40 98 03 00 65 8b 0d 24 cc 75 7e f7 c1 00 01 ff 00 74 11 f7 c1 00 01 00 00 74 7b 83 ba 6c 15 00 00 00 74 72 8b 8a 48 15 00 00 <83> f9 03 75 67 48 8b 8a 50 15 00 00 44 8b 8a 4c 15 00 00 49 c1 e1 RSP: 0018:ffffc900049feb58 EFLAGS: 00000046 RAX: 1ffff11017306971 RBX: 0000000000000008 RCX: 0000000000000000 RDX: ffff888066ff3a80 RSI: 0000000000000008 RDI: 0000000000000000 RBP: ffffc900049fec68 R08: ffffffff81b8fd05 R09: ffffc900049febc0 R10: fffff5200093fd7b R11: 1ffff9200093fd78 R12: 1ffff9200093fd7a R13: 1ffff9200093fd7a R14: ffff8880b9834b00 R15: 1ffff9200093fd80 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000002c1f3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_callchain_store_context include/linux/perf_event.h:1416 [inline] get_perf_callchain+0x2c5/0x7c0 kernel/events/callchain.c:199 perf_callchain kernel/events/core.c:7559 [inline] perf_prepare_sample+0x374/0x1d90 kernel/events/core.c:7592 __perf_event_output kernel/events/core.c:7777 [inline] perf_event_output_forward+0x176/0x2c0 kernel/events/core.c:7797 __perf_event_overflow+0x445/0x620 kernel/events/core.c:9533 perf_tp_event+0x350/0x1f60 kernel/events/core.c:10142 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10077 perf_trace_preemptirq_template+0x2ca/0x3d0 include/trace/events/preemptirq.h:14 trace_irq_enable_rcuidle+0xe2/0x150 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:675 RIP: 0010:rcu_read_unlock_special+0x84/0x540 kernel/rcu/tree_plugin.h:680 Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 fd 94 8c 7e 41 f7 c4 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a RSP: 0018:ffffc900049ff420 EFLAGS: 00000206 RAX: 8b873bf8b969dc00 RBX: 1ffff9200093fe8c RCX: ffffffff816cfaea RDX: dffffc0000000000 RSI: ffffffff8b0d9860 RDI: ffffffff8b6977c0 RBP: ffffc900049ff4f8 R08: dffffc0000000000 R09: fffffbfff212e031 R10: fffffbfff212e031 R11: 1ffffffff212e030 R12: ffffffff8d528600 R13: ffff888066ff3ed8 R14: ffffc900049ff460 R15: 1ffff9200093fe88 __rcu_read_unlock+0x8f/0x100 kernel/rcu/tree_plugin.h:424 rcu_read_unlock include/linux/rcupdate.h:796 [inline] __folio_memcg_unlock mm/memcontrol.c:2153 [inline] folio_memcg_unlock+0x18e/0x240 mm/memcontrol.c:2166 page_remove_rmap+0x4b9/0xfc0 mm/rmap.c:1454 zap_pte_range+0xa45/0x1c40 mm/memory.c:1405 zap_pmd_range+0x520/0x760 mm/memory.c:1529 zap_pud_range mm/memory.c:1558 [inline] zap_p4d_range mm/memory.c:1579 [inline] unmap_page_range+0x466/0x7a0 mm/memory.c:1600 unmap_vmas+0x3c9/0x560 mm/memory.c:1685 exit_mmap+0x243/0x670 mm/mmap.c:3085 __mmput+0x114/0x3b0 kernel/fork.c:1207 exit_mm+0x20f/0x2f0 kernel/exit.c:563 do_exit+0x5c7/0x2150 kernel/exit.c:854 do_group_exit+0x1fd/0x2b0 kernel/exit.c:1012 __do_sys_exit_group kernel/exit.c:1023 [inline] __se_sys_exit_group kernel/exit.c:1021 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1021 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f106ac7fb39 Code: Unable to access opcode bytes at 0x7f106ac7fb0f. RSP: 002b:00007fffdbb983f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f106acf3330 RCX: 00007f106ac7fb39 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007f106acf3330 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001