rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 6374 jiffies s: 17249 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: 5096 Comm: syz-executor.0 Not tainted 6.9.0-rc6-syzkaller-01528-g1b3b2d9e772b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:__lock_acquire+0x13b2/0x1fd0 kernel/locking/lockdep.c:5145 Code: df e8 a2 64 88 00 48 ba 00 00 00 00 00 fc ff df 48 89 2b 48 8b 44 24 40 0f b6 04 10 84 c0 0f 85 84 09 00 00 48 8b 0c 24 8b 01 c0 89 01 83 f8 30 0f 83 5f 02 00 00 3b 05 3b 69 81 11 0f 87 b9 RSP: 0018:ffffc90000a087f0 EFLAGS: 00000046 RAX: 0000000000000007 RBX: ffff8880297146c8 RCX: ffff8880297146d0 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff92f42508 RBP: 3be9ba32c8301548 R08: ffffffff92f4250f R09: 1ffffffff25e84a1 R10: dffffc0000000000 R11: fffffbfff25e84a2 R12: ffff888029713c00 R13: ffff888029713c00 R14: 0000000000000001 R15: ffff888029713c00 FS: 000055557915f480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fef1bed56c6 CR3: 0000000079ffc000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:170 __run_hrtimer kernel/time/hrtimer.c:1696 [inline] __hrtimer_run_queues+0x67a/0xd50 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:321 [inline] RIP: 0010:__do_softirq+0x1db/0x980 kernel/softirq.c:542 Code: 89 7c 24 70 0f b7 db 48 c7 c7 80 ae c9 8b e8 ac 1c f5 ff 65 66 c7 05 ea 13 76 74 00 00 e8 8d a7 0f f6 fb 49 c7 c5 c0 a0 00 8e <89> 5c 24 34 b8 ff ff ff ff 0f bc 44 24 34 41 89 c4 41 ff c4 0f 84 RSP: 0018:ffffc90000a08e40 EFLAGS: 00000286 RAX: 3c61029924c12d00 RBX: 0000000000000386 RCX: ffffffff8173197a RDX: dffffc0000000000 RSI: ffffffff8bcab900 RDI: ffffffff8c1f8600 RBP: ffffc90000a08f50 R08: ffffffff92f4259f R09: 1ffffffff25e84b3 R10: dffffc0000000000 R11: fffffbfff25e84b4 R12: ffff888029713c00 R13: ffffffff8e00a0c0 R14: dffffc0000000000 R15: 1ffff920001411dc invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633 irq_exit_rcu+0x9/0x30 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x70 kernel/kcov.c:207 Code: c0 d3 03 00 65 8b 15 30 a9 6d 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 14 16 00 00 00 74 2c 8b 91 f0 15 00 00 <83> fa 02 75 21 48 8b 91 f8 15 00 00 48 8b 32 48 8d 7e 01 8b 89 f4 RSP: 0018:ffffc90003e8f368 EFLAGS: 00000246 RAX: ffffffff81e467b0 RBX: ffffea0001c59a48 RCX: ffff888029713c00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff81e46799 R09: 1ffff11002b71ba1 R10: dffffc0000000000 R11: ffffed1002b71ba2 R12: 1ffffd400038b351 R13: ffffea0001c59a80 R14: 0000000000000000 R15: 840000007166a805 arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline] page_fixed_fake_head include/linux/page-flags.h:209 [inline] _compound_head include/linux/page-flags.h:250 [inline] PageAnon include/linux/page-flags.h:703 [inline] PageAnonExclusive include/linux/page-flags.h:1081 [inline] __folio_try_dup_anon_rmap include/linux/rmap.h:405 [inline] folio_try_dup_anon_rmap_ptes+0x380/0x16c0 include/linux/rmap.h:448 copy_present_ptes mm/memory.c:1021 [inline] copy_pte_range mm/memory.c:1151 [inline] copy_pmd_range mm/memory.c:1238 [inline] copy_pud_range mm/memory.c:1275 [inline] copy_p4d_range mm/memory.c:1299 [inline] copy_page_range+0x1721/0x5b00 mm/memory.c:1397 dup_mmap kernel/fork.c:751 [inline] dup_mm kernel/fork.c:1688 [inline] copy_mm+0x1321/0x2180 kernel/fork.c:1737 copy_process+0x187a/0x3df0 kernel/fork.c:2390 kernel_clone+0x226/0x8f0 kernel/fork.c:2797 __do_sys_clone kernel/fork.c:2940 [inline] __se_sys_clone kernel/fork.c:2924 [inline] __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2924 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fef1b27ad93 Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00 RSP: 002b:00007ffe880f7dd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fef1b27ad93 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 000055557915f750 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001