watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [syz-executor:5144] Modules linked in: irq event stamp: 40479667 hardirqs last enabled at (40479666): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] hardirqs last enabled at (40479666): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:198 hardirqs last disabled at (40479667): [] __el1_irq arch/arm64/kernel/entry-common.c:507 [inline] hardirqs last disabled at (40479667): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:523 softirqs last enabled at (8259724): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (8259724): [] __tcp_close+0xa78/0xd80 net/ipv4/tcp.c:3305 softirqs last disabled at (8259725): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 0 UID: 0 PID: 5144 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: 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 : ffff80008eb57dc0 x29: ffff80008eb57dc0 x28: 1fffe00034bb7c3a x27: ffff0001a5dbe1c0 x26: ffff0001a5dbe1d0 x25: ffff0000d1e18d38 x24: dfff800000000000 x23: 0000000000000001 x22: ffff800084ed1c18 x21: ffff0001a5dbdd80 x20: ffff0001a5dbdd80 x19: 0000000000000000 x18: 00000000ffffffff x17: ffff80008a7c2000 x16: 0000000000000005 x15: ffff80008a34bda0 x14: 000000008030fe08 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a5c1e28 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080157144 x2 : 0000000000000002 x1 : ffff0000dd8e9d40 x0 : ffff80011d2e8000 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) __run_hrtimer kernel/time/hrtimer.c:2028 [inline] __hrtimer_run_queues+0x22c/0xbe0 kernel/time/hrtimer.c:2096 hrtimer_run_softirq+0x15c/0x21c kernel/time/hrtimer.c:2113 handle_softirqs+0x2ec/0xd98 kernel/softirq.c:622 __do_softirq+0x14/0x20 kernel/softirq.c:656 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:78 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:885 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83 do_softirq+0x90/0xf8 kernel/softirq.c:523 __local_bh_enable_ip+0x240/0x35c kernel/softirq.c:450 local_bh_enable include/linux/bottom_half.h:33 [inline] __tcp_close+0xa80/0xd80 net/ipv4/tcp.c:3305 tcp_close+0x38/0x140 net/ipv4/tcp.c:3311 inet_release+0x154/0x1cc net/ipv4/af_inet.c:442 __sock_release+0xa0/0x1d4 net/socket.c:710 sock_close+0x24/0x38 net/socket.c:1501 __fput+0x338/0x74c fs/file_table.c:512 fput_close_sync+0x10c/0x278 fs/file_table.c:617 __do_sys_close fs/open.c:1511 [inline] __se_sys_close fs/open.c:1496 [inline] __arm64_sys_close+0x80/0x110 fs/open.c:1496 __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:738 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:757 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31009 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: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : check_kcov_mode+0xc/0x54 kernel/kcov.c:183 lr : write_comp_data+0x38/0x84 kernel/kcov.c:246 sp : ffff8000a0a87060 x29: ffff8000a0a87060 x28: ffff0000e13a0a00 x27: 0000000000000000 x26: fffffdffc4557230 x25: dfff800000000000 x24: 1fffffbff88aae43 x23: ffff0000d87d8000 x22: 0000000000000007 x21: 0000000000000003 x20: 0000000000000000 x19: ffff800080a93ddc x18: 0000000000000000 x17: 0000000000000002 x16: 0000000000000000 x15: 0000000000000000 x14: 00000000000001c0 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 00003e0040000000 x9 : 0000000000000000 x8 : ffff0000d87d8000 x7 : ffff800080c48cd4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080a93ddc x2 : 0000000000000000 x1 : ffff0000d87d8000 x0 : 0000000000000003 Call trace: check_kcov_mode+0xc/0x54 kernel/kcov.c:183 (P) __sanitizer_cov_trace_const_cmp8+0x24/0x30 kernel/kcov.c:321 folio_remove_rmap_ptes+0x1dc/0xc40 mm/rmap.c:-1 zap_present_folio_ptes mm/memory.c:1672 [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+0x192c/0x42d0 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:739 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:757 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590