GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz.4.204:5769] Modules linked in: irq event stamp: 79922 hardirqs last enabled at (79921): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (79921): [] __arm64_exit_to_kernel_mode+0x70/0xcc arch/arm64/kernel/entry-common.c:98 hardirqs last disabled at (79922): [] __el1_irq arch/arm64/kernel/entry-common.c:565 [inline] hardirqs last disabled at (79922): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:581 softirqs last enabled at (79920): [] softirq_handle_end kernel/softirq.c:491 [inline] softirqs last enabled at (79920): [] handle_softirqs+0xb2c/0xcbc kernel/softirq.c:673 softirqs last disabled at (79889): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 CPU: 1 UID: 0 PID: 5769 Comm: syz.4.204 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : csd_lock_wait kernel/smp.c:363 [inline] pc : csd_lock kernel/smp.c:396 [inline] pc : smp_call_function_many_cond+0x65c/0x14e0 kernel/smp.c:944 lr : csd_lock_wait kernel/smp.c:363 [inline] lr : csd_lock kernel/smp.c:396 [inline] lr : smp_call_function_many_cond+0x674/0x14e0 kernel/smp.c:944 sp : ffff8000990d7580 x29: ffff8000990d76c0 x28: dfff800000000000 x27: 0000000000000011 x26: 0000000000000000 x25: ffff800088a7a960 x24: 0000000000000000 x23: 1ffff0001114f52c x22: ffff0001adec3688 x21: ffff0001adec3680 x20: ffff0000d9281538 x19: ffff0001adee3400 x18: ffff80009485b074 x17: ffff80009485b072 x16: ffff80009485b071 x15: 0000000000000001 x14: 00000000006f4259 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000080000 x9 : 0000000000000000 x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff80008059e388 x2 : 0000000000000000 x1 : ffff0000d9280000 x0 : 0000000000000001 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:363 [inline] (P) csd_lock kernel/smp.c:396 [inline] (P) smp_call_function_many_cond+0x65c/0x14e0 kernel/smp.c:944 (P) smp_call_function kernel/smp.c:1043 [inline] kick_all_cpus_sync+0x34/0x40 kernel/smp.c:1192 flush_icache_range arch/arm64/include/asm/cacheflush.h:105 [inline] __text_poke+0xd8/0xf8 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:2400 bpf_jit_binary_pack_finalize+0x44/0xf0 kernel/bpf/core.c:1244 bpf_int_jit_compile+0xd4c/0x1184 arch/arm64/net/bpf_jit_comp.c:2320 bpf_prog_jit_compile kernel/bpf/core.c:2637 [inline] __bpf_prog_select_runtime+0x3b0/0x768 kernel/bpf/core.c:2692 bpf_prog_select_runtime+0x2c/0x3c kernel/bpf/core.c:2737 bpf_migrate_filter net/core/filter.c:1322 [inline] bpf_prepare_filter+0xc74/0xdac net/core/filter.c:1370 bpf_prog_create_from_user+0x1c4/0x26c net/core/filter.c:1464 seccomp_prepare_filter kernel/seccomp.c:701 [inline] seccomp_prepare_user_filter kernel/seccomp.c:738 [inline] seccomp_set_mode_filter kernel/seccomp.c:1988 [inline] do_seccomp+0x6fc/0xbfc kernel/seccomp.c:2108 __do_sys_seccomp kernel/seccomp.c:2127 [inline] __se_sys_seccomp kernel/seccomp.c:2124 [inline] __arm64_sys_seccomp+0x84/0x98 kernel/seccomp.c:2124 __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+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5772 Comm: syz.2.205 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:-1 [inline] pc : arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] pc : handle_softirqs+0x1ec/0xcbc kernel/softirq.c:629 lr : handle_softirqs+0x1e8/0xcbc kernel/softirq.c:629 sp : ffff80008eab7ef0 x29: ffff80008eab7f80 x28: ffff0000c65a5888 x27: ffff0000c65a5890 x26: 00000000000000a0 x25: 0000000000000386 x24: dfff800000000000 x23: dfff800000000000 x22: ffff0000c65a5880 x21: 000000000000000a x20: ffff800088a37080 x19: ffff0001adebb080 x18: 000000004348c716 x17: ffff800125484000 x16: ffff80008eab0000 x15: 00a033b800000000 x14: 0000000007a1fdf9 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000000003 x9 : 0000000000000001 x8 : 00000000000002e6 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801557b0 x2 : 0000000000000000 x1 : ffff0000c65a5880 x0 : ffff800125484000 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+0x1ec/0xcbc kernel/softirq.c:629 (P) __do_softirq+0x14/0x20 kernel/softirq.c:679 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:78 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:901 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83 invoke_softirq kernel/softirq.c:526 [inline] __irq_exit_rcu+0x10c/0x318 kernel/softirq.c:758 irq_exit_rcu+0x14/0x84 kernel/softirq.c:775 __el1_irq arch/arm64/kernel/entry-common.c:569 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:581 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:586 el1h_64_irq+0x78/0x7c arch/arm64/kernel/entry.S:602 __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:210 [inline] (P) _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:221 (P) stack_depot_save_flags+0x488/0x8cc lib/stackdepot.c:728 kasan_save_stack mm/kasan/common.c:58 [inline] kasan_save_track+0x54/0x78 mm/kasan/common.c:78 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:570 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_node_noprof+0x39c/0x618 mm/slub.c:5582 _kmalloc_node_noprof include/linux/slab.h:1196 [inline] alloc_cpumask_var_node+0x90/0x138 lib/cpumask.c:30 alloc_cpumask_var include/linux/cpumask.h:1053 [inline] zalloc_cpumask_var include/linux/cpumask.h:1059 [inline] clock_was_set+0xa0/0x704 kernel/time/hrtimer.c:985 do_adjtimex+0x208/0x2f0 kernel/time/timekeeping.c:3057 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+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606