watchdog: BUG: soft lockup - CPU#1 stuck for 34s! [syz-executor.5:7582] Modules linked in: irq event stamp: 636 hardirqs last enabled at (635): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (635): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (636): [] __el1_irq arch/arm64/kernel/entry-common.c:499 [inline] hardirqs last disabled at (636): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:517 softirqs last enabled at (334): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (332): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 PID: 7582 Comm: syz-executor.5 Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] pc : _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 lr : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] lr : _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 sp : ffff8000999272f0 x29: ffff8000999272f0 x28: ffff0000c8337390 x27: ffff80009368dc38 x26: 0000000000000001 x25: dfff800000000000 x24: 0000000000000000 x23: 0000000000000000 x22: ffff0000d0a2f000 x21: 0000000000000000 x20: ffff80009368dc38 x19: 0000000000000000 x18: 0000000000000000 x17: ffff80008ec6d000 x16: ffff80008031ffc8 x15: 0000000000000001 x14: 1ffff000126d1b87 x13: 0000000000000000 x12: 0000000000000003 x11: 0000000000000001 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800082f9aa80 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff80008aecd7e0 x0 : ffff80012545c000 Call trace: __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:176 [inline] arch_local_irq_restore arch/arm64/include/asm/irqflags.h:196 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 __debug_check_no_obj_freed lib/debugobjects.c:998 [inline] debug_check_no_obj_freed+0x460/0x47c lib/debugobjects.c:1019 slab_free_hook mm/slub.c:2093 [inline] slab_free mm/slub.c:4299 [inline] kmem_cache_free+0x128/0x3d0 mm/slub.c:4363 anon_vma_free mm/rmap.c:137 [inline] __put_anon_vma+0x120/0x2d0 mm/rmap.c:2522 put_anon_vma include/linux/rmap.h:116 [inline] unlink_anon_vmas+0x3dc/0x520 mm/rmap.c:445 free_pgtables+0x444/0x6a0 mm/memory.c:402 exit_mmap+0x3f8/0xd54 mm/mmap.c:3288 __mmput+0xec/0x390 kernel/fork.c:1343 mmput+0x70/0xac kernel/fork.c:1365 exit_mm+0x148/0x210 kernel/exit.c:569 do_exit+0x478/0x1f64 kernel/exit.c:858 do_group_exit+0x194/0x22c kernel/exit.c:1020 get_signal+0x1500/0x15ec kernel/signal.c:2893 do_signal arch/arm64/kernel/signal.c:1249 [inline] do_notify_resume+0x3bc/0x393c arch/arm64/kernel/signal.c:1302 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x9c/0x158 arch/arm64/kernel/entry-common.c:679 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:51 lr : default_idle_call+0xf8/0x128 kernel/sched/idle.c:103 sp : ffff80008ebe7cd0 x29: ffff80008ebe7cd0 x28: dfff800000000000 x27: 1ffff00011d7cfa8 x26: ffff80008ec6d000 x25: 0000000000000000 x24: 0000000000000001 x23: 1ffff00011d8da74 x22: ffff80008ec6d3a0 x21: 0000000000000000 x20: ffff80008ec94e00 x19: ffff8000802cff08 x18: 1fffe000367ff796 x17: ffff80008ec6d000 x16: ffff8000802cf7cc x15: 0000000000000001 x14: 1fffe00036801310 x13: 0000000000000000 x12: 0000000000000003 x11: 0000000000000001 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000ba777 x7 : ffff800080461668 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008ad5af48 x2 : 0000000000000000 x1 : ffff80008aecd7e0 x0 : ffff80012543a000 Call trace: __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:27 [inline] arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:49 cpuidle_idle_call kernel/sched/idle.c:170 [inline] do_idle+0x1f0/0x4e8 kernel/sched/idle.c:312 cpu_startup_entry+0x5c/0x74 kernel/sched/idle.c:410 rest_init+0x2dc/0x2f4 init/main.c:730 start_kernel+0x0/0x4e8 init/main.c:827 start_kernel+0x3e8/0x4e8 init/main.c:1072 __primary_switched+0xb4/0xbc arch/arm64/kernel/head.S:523