watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz.2.2117:12554] Modules linked in: irq event stamp: 95198 hardirqs last enabled at (95197): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (95197): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (95198): [] __el1_irq arch/arm64/kernel/entry-common.c:506 [inline] hardirqs last disabled at (95198): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:522 softirqs last enabled at (95196): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (95196): [] handle_softirqs+0xbc4/0xd34 kernel/softirq.c:650 softirqs last disabled at (95033): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 1 UID: 0 PID: 12554 Comm: syz.2.2117 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : csd_lock_wait kernel/smp.c:342 [inline] pc : smp_call_function_many_cond+0xfa4/0x1614 kernel/smp.c:892 lr : csd_lock_wait kernel/smp.c:342 [inline] lr : smp_call_function_many_cond+0xfbc/0x1614 kernel/smp.c:892 sp : ffff800094ff72e0 x29: ffff800094ff73f0 x28: dfff800000000000 x27: ffff0001a5ff5580 x26: 0000000000000011 x25: 0000000000000000 x24: ffff80008897f680 x23: ffffffffffffffff x22: 1fffe00034bfeab0 x21: 1fffe00034bfeab1 x20: ffff0001a5fd6968 x19: ffff0001a5ff5588 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 00000000ffff8000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000805a3f94 x2 : 0000000000000000 x1 : ffff0000f37c8000 x0 : 0000000000000000 Call trace: __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:233 [inline] (P) __cmpwait arch/arm64/include/asm/cmpxchg.h:259 [inline] (P) csd_lock_wait kernel/smp.c:342 [inline] (P) smp_call_function_many_cond+0xfa4/0x1614 kernel/smp.c:892 (P) smp_call_function_many kernel/smp.c:915 [inline] smp_call_function+0x58/0xbc kernel/smp.c:935 kick_all_cpus_sync+0x28/0x34 kernel/smp.c:1081 flush_icache_range arch/arm64/include/asm/cacheflush.h:105 [inline] __text_poke+0xd4/0xf4 arch/arm64/kernel/patching.c:129 aarch64_insn_copy+0x3c/0x50 arch/arm64/kernel/patching.c:160 bpf_arch_text_copy+0x34/0x54 arch/arm64/net/bpf_jit_comp.c:2234 bpf_jit_binary_pack_finalize+0x44/0xf0 kernel/bpf/core.c:1179 bpf_int_jit_compile+0xc40/0xffc arch/arm64/net/bpf_jit_comp.c:2164 bpf_prog_jit_compile kernel/bpf/core.c:2561 [inline] __bpf_prog_select_runtime+0x34c/0x684 kernel/bpf/core.c:2630 bpf_check+0x2c4c/0x3c88 kernel/bpf/verifier.c:20189 bpf_prog_load+0xf40/0x1434 kernel/bpf/syscall.c:3082 __sys_bpf+0x3f4/0x5f0 kernel/bpf/syscall.c:6274 __do_sys_bpf kernel/bpf/syscall.c:6387 [inline] __se_sys_bpf kernel/bpf/syscall.c:6385 [inline] __arm64_sys_bpf+0x80/0x98 kernel/bpf/syscall.c:6385 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x48/0x58 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: 12547 Comm: syz.0.2115 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : handle_softirqs+0x1d0/0xd34 kernel/softirq.c:610 lr : handle_softirqs+0x1cc/0xd34 kernel/softirq.c:606 sp : ffff80008e987ee0 x29: ffff80008e987f80 x28: ffff0000d8ec1d10 x27: 0000000000000386 x26: ffff0000d8ec1d08 x25: 1fffe0001b1d83a1 x24: ffff800088920230 x23: ffff0000d8ec1d00 x22: dfff800000000000 x21: ffff0001a5fce280 x20: ffff80008891febc x19: ffff0001a5fce280 x18: 1fffe00034bf7420 x17: ffff80011d69a000 x16: ffff80008e980000 x15: 0000000000000000 x14: 000050822105d180 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a3f3d08 x10: 0000000000000003 x9 : 0000000000000000 x8 : 0000000000002c7a x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080155224 x2 : 0000000000000003 x1 : ffff0000d8ec1d00 x0 : ffff80011d69a000 Call trace: __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P) arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] (P) handle_softirqs+0x1d0/0xd34 kernel/softirq.c:606 (P) __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:889 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83 invoke_softirq kernel/softirq.c:503 [inline] __irq_exit_rcu+0x1ac/0x428 kernel/softirq.c:735 irq_exit_rcu+0x14/0x84 kernel/softirq.c:752 __el1_irq arch/arm64/kernel/entry-common.c:510 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:522 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:527 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:590 __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_is_held_type+0x13c/0x190 kernel/locking/lockdep.c:5942 (P) lock_is_held include/linux/lockdep.h:249 [inline] xa_head include/linux/xarray.h:1210 [inline] xas_start+0x1bc/0x6b8 lib/xarray.c:191 xas_load+0x3c/0x4f0 lib/xarray.c:239 xas_find+0x120/0x61c lib/xarray.c:1406 xas_next_entry+0x33c/0x38c include/linux/xarray.h:-1 next_uptodate_folio+0x48/0x5e0 mm/filemap.c:3705 filemap_map_pages+0x238/0x1cf0 mm/filemap.c:3896 do_fault_around mm/memory.c:5867 [inline] do_read_fault mm/memory.c:5900 [inline] do_fault mm/memory.c:6043 [inline] do_pte_missing+0x17d0/0x28a4 mm/memory.c:4566 handle_pte_fault mm/memory.c:6427 [inline] __handle_mm_fault mm/memory.c:6565 [inline] handle_mm_fault+0x1558/0x2454 mm/memory.c:6734 faultin_page mm/gup.c:1126 [inline] __get_user_pages+0x678/0x20f0 mm/gup.c:1428 populate_vma_page_range+0x260/0x358 mm/gup.c:1860 __mm_populate+0x200/0x324 mm/gup.c:1963 mm_populate include/linux/mm.h:4137 [inline] vm_mmap_pgoff+0x3a4/0x470 mm/util.c:586 ksys_mmap_pgoff+0xd0/0x5b4 mm/mmap.c:606 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline] __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline] __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x48/0x58 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 ip6_tunnel: ip6tnl1 xmit: Local address not yet configured!