watchdog: BUG: soft lockup - CPU#1 stuck for 25s! [syz.6.1631:10718] Modules linked in: irq event stamp: 134 hardirqs last enabled at (133): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] hardirqs last enabled at (133): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:198 hardirqs last disabled at (134): [] __el1_irq arch/arm64/kernel/entry-common.c:506 [inline] hardirqs last disabled at (134): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:522 softirqs last enabled at (120): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (120): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (115): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 1 UID: 0 PID: 10718 Comm: syz.6.1631 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] pc : _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:198 lr : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] lr : _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:198 sp : ffff800092d37940 x29: ffff800092d37940 x28: dfff800000000000 x27: ffff7000125a6f30 x26: ffff80008e80e330 x25: 7fffffffffffffff x24: 0000000000000005 x23: ffff800092d37a80 x22: 7fffffffffffffff x21: 0000000000000000 x20: ffff80008e80e358 x19: 0000000000000000 x18: 00000000e151d801 x17: 0000000099a53463 x16: 0000000068bc76ec x15: 0000000000000000 x14: 00005019dbadb980 x13: 0000000000000001 x12: 0000000000000000 x11: ffff800080157100 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : 0000000000000000 x6 : 00004c4b40000000 x5 : ffff80008e80e228 x4 : 0000000000000008 x3 : ffff8000801571a8 x2 : 0000000000000000 x1 : ffff0000c8b98000 x0 : ffff80012539e000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] (P) _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:198 (P) class_raw_spinlock_irqsave_destructor include/linux/spinlock.h:573 [inline] __do_adjtimex+0x908/0xb8c kernel/time/timekeeping.c:2985 do_adjtimex+0xc0/0x2f0 kernel/time/timekeeping.c:2996 posix_clock_realtime_adj+0x20/0x30 kernel/time/posix-timers.c:207 do_clock_adjtime+0x120/0x140 kernel/time/posix-timers.c:1169 __do_sys_clock_adjtime kernel/time/posix-timers.c:1181 [inline] __se_sys_clock_adjtime kernel/time/posix-timers.c:1172 [inline] __arm64_sys_clock_adjtime+0x184/0x2b0 kernel/time/posix-timers.c:1172 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 10752 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : lock_acquire+0x16c/0x364 arch/arm64/include/asm/irqflags.h:-1 lr : lockdep_recursion_finish kernel/locking/lockdep.c:470 [inline] lr : lock_acquire+0x14c/0x364 kernel/locking/lockdep.c:5870 sp : ffff800096706ff0 x29: ffff800096707040 x28: 0000000000000000 x27: 0000000000000000 x26: ffff800088ab12f0 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000002 x22: ffff800088cf7020 x21: ffff800080c48af4 x20: 0000000000000000 x19: 0000000000000000 x18: 00000000ffffffff x17: 0000000000000002 x16: 0000000000000000 x15: 0000000000000000 x14: 00000000000001c0 x13: 0000000000000001 x12: ffff0000ccd2d7c0 x11: 000000004d2e2d6b x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800080c48af4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : ffff0000ccd2d7c0 x0 : 0000000000000000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) lock_acquire+0x16c/0x364 kernel/locking/lockdep.c:5871 (P) rcu_lock_acquire include/linux/rcupdate.h:300 [inline] rcu_read_lock include/linux/rcupdate.h:840 [inline] page_table_check_clear+0x160/0x510 mm/page_table_check.c:77 __page_table_check_pte_clear+0xa0/0xc0 mm/page_table_check.c:155 page_table_check_pte_clear include/linux/page_table_check.h:55 [inline] __ptep_get_and_clear_anysz arch/arm64/include/asm/pgtable.h:1361 [inline] __ptep_get_and_clear arch/arm64/include/asm/pgtable.h:1381 [inline] __get_and_clear_full_ptes arch/arm64/include/asm/pgtable.h:1402 [inline] get_and_clear_full_ptes arch/arm64/include/asm/pgtable.h:1817 [inline] zap_present_folio_ptes mm/memory.c:1648 [inline] zap_present_ptes mm/memory.c:1730 [inline] do_zap_pte_range mm/memory.c:1832 [inline] zap_pte_range mm/memory.c:1934 [inline] zap_pmd_range mm/memory.c:2020 [inline] zap_pud_range mm/memory.c:2048 [inline] zap_p4d_range mm/memory.c:2069 [inline] __zap_vma_range+0x2c10/0x42f4 mm/memory.c:2109 unmap_vmas+0x2e0/0x43c mm/memory.c:2178 exit_mmap+0x1e8/0xad4 mm/mmap.c:1300 __mmput+0xe0/0x2e8 kernel/fork.c:1187 mmput+0x70/0xa8 kernel/fork.c:1210 exit_mm+0x1ac/0x264 kernel/exit.c:615 do_exit+0x524/0x1a74 kernel/exit.c:997 do_group_exit+0x198/0x238 kernel/exit.c:1152 get_signal+0xfb0/0x1094 kernel/signal.c:3046 arch_do_signal_or_restart+0x288/0x444c arch/arm64/kernel/signal.c:1665 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop+0x70/0x17c kernel/entry/common.c:101 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] arm64_syscall_exit_to_user_mode arch/arm64/kernel/entry-common.c:88 [inline] el0_svc+0x18c/0x260 arch/arm64/kernel/entry-common.c:737 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594