rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=1d4c/1/0x4000000000000000 softirq=203534/203544 fqs=5068 rcu: hardirqs softirqs csw/system rcu: number: 8721 0 0 rcu: cputime: 193 52285 18 ==> 52480(ms) rcu: (t=10500 jiffies g=205661 q=13807 ncpus=2) CPU: 0 UID: 0 PID: 11861 Comm: syz.0.17888 Not tainted 6.16.0-rc1-syzkaller-00239-g08215f5486ec #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:taprio_dequeue_tc_priority+0x1a7/0x750 net/sched/sch_taprio.c:787 Code: 83 58 01 00 00 e8 19 73 3a f8 42 0f b6 44 25 00 84 c0 0f 85 a6 02 00 00 41 8b 75 00 48 8b 7c 24 48 48 8b 54 24 50 8b 4c 24 1c b4 05 00 00 48 89 44 24 10 48 8b 44 24 58 42 0f b6 04 20 84 c0 RSP: 0018:ffffc90000007b48 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000026f RDX: ffff888020f9ec00 RSI: 0000000000000008 RDI: ffff8880216d6000 RBP: 1ffff110042dac72 R08: 0000000000000000 R09: ffffffff89854036 R10: 0000000000000001 R11: ffffffff8978acd0 R12: dffffc0000000000 R13: ffff8880216d6390 R14: 0000000000000010 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888125c51000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbc520e56c0 CR3: 0000000062b22000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: taprio_dequeue+0x186/0x550 net/sched/sch_taprio.c:-1 dequeue_skb net/sched/sch_generic.c:294 [inline] qdisc_restart net/sched/sch_generic.c:399 [inline] __qdisc_run+0x239/0x15f0 net/sched/sch_generic.c:417 qdisc_run+0xc2/0x230 include/net/pkt_sched.h:127 net_tx_action+0x7c9/0x980 net/core/dev.c:5624 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5875 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 3b bd fe 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc9000b48f4f0 EFLAGS: 00000206 RAX: 0f6056d44fca5400 RBX: 0000000000000000 RCX: 0f6056d44fca5400 RDX: 0000000000000000 RSI: ffffffff8db6ecc6 RDI: ffffffff8be28a80 RBP: ffffffff822ef8c7 R08: 0000000000000000 R09: ffffffff822ef8c7 R10: dffffc0000000000 R11: fffff940003be0d9 R12: 0000000000000002 R13: ffffffff8e13ed60 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] page_table_check_clear+0x1a4/0x700 mm/page_table_check.c:77 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline] clear_full_ptes include/linux/pgtable.h:751 [inline] zap_present_folio_ptes mm/memory.c:1518 [inline] zap_present_ptes mm/memory.c:1590 [inline] do_zap_pte_range mm/memory.c:1691 [inline] zap_pte_range mm/memory.c:1735 [inline] zap_pmd_range mm/memory.c:1827 [inline] zap_pud_range mm/memory.c:1856 [inline] zap_p4d_range mm/memory.c:1877 [inline] unmap_page_range+0x326e/0x41c0 mm/memory.c:1898 unmap_single_vma mm/memory.c:1941 [inline] unmap_vmas+0x399/0x580 mm/memory.c:1985 exit_mmap+0x248/0xb50 mm/mmap.c:1284 __mmput+0x118/0x420 kernel/fork.c:1121 exit_mm+0x1da/0x2c0 kernel/exit.c:581 do_exit+0x640/0x22e0 kernel/exit.c:943 do_group_exit+0x21c/0x2d0 kernel/exit.c:1104 __do_sys_exit_group kernel/exit.c:1115 [inline] __se_sys_exit_group kernel/exit.c:1113 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1113 x64_sys_call+0x21ba/0x21c0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2a7b78e929 Code: Unable to access opcode bytes at 0x7f2a7b78e8ff. RSP: 002b:00007f2a7badfd88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2a7b78e929 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f2a7badfdec R08: 000000047badfe7f R09: 00000000000927c0 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000dd0 R13: 00000000000927c0 R14: 0000000000110694 R15: 00007f2a7badfe40