watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz.1.1431:10726] Modules linked in: irq event stamp: 41460 hardirqs last enabled at (41459): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (41459): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (41460): [] __el1_irq arch/arm64/kernel/entry-common.c:506 [inline] hardirqs last disabled at (41460): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:522 softirqs last enabled at (41454): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (41454): [] handle_softirqs+0xc28/0xd98 kernel/softirq.c:650 softirqs last disabled at (41449): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 1 UID: 0 PID: 10726 Comm: syz.1.1431 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : csd_lock_wait kernel/smp.c:342 [inline] pc : smp_call_function_many_cond+0xfd0/0x1640 kernel/smp.c:892 lr : csd_lock_wait kernel/smp.c:342 [inline] lr : smp_call_function_many_cond+0xfe8/0x1640 kernel/smp.c:892 sp : ffff8000923f7720 x29: ffff8000923f7810 x28: 0000000000000011 x27: 0000000000000000 x26: ffff0001adf97780 x25: ffff800088a0f680 x24: ffffffffffffffff x23: 1fffe00035bf2ef0 x22: dfff800000000000 x21: 1fffe00035bf2ef1 x20: ffff0001adf97788 x19: ffff0001adf78b68 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 00000000200000c0 x14: 00000000ffff8000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000080000 x9 : 0000000000000000 x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000805a8f60 x2 : 0000000000000000 x1 : ffff0000df323a00 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:342 [inline] (P) smp_call_function_many_cond+0xfd0/0x1640 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 arch_jump_label_transform_apply+0x14/0x20 arch/arm64/kernel/jump_label.c:34 __jump_label_update+0x31c/0x344 kernel/jump_label.c:521 jump_label_update+0x428/0x4b8 kernel/jump_label.c:910 static_key_slow_inc_cpuslocked+0x98/0x114 kernel/jump_label.c:168 static_key_slow_inc+0x24/0x40 kernel/jump_label.c:191 __cgroup_bpf_attach kernel/bpf/cgroup.c:884 [inline] cgroup_bpf_attach+0x798/0x814 kernel/bpf/cgroup.c:915 cgroup_bpf_link_attach+0x23c/0x3d4 kernel/bpf/cgroup.c:1506 link_create+0x2e8/0x648 kernel/bpf/syscall.c:-1 __sys_bpf+0x51c/0x5f0 kernel/bpf/syscall.c:6344 __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+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: 10723 Comm: syz.1.1431 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 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+0x1cc/0xd98 kernel/softirq.c:606 lr : handle_softirqs+0x1c8/0xd98 kernel/softirq.c:606 sp : ffff80008ea17ef0 x29: ffff80008ea17f80 x28: ffff0000c7575708 x27: ffff0000c7575710 x26: 7fffffffffffffff x25: 0000000000000386 x24: dfff800000000000 x23: ffff0001adf70480 x22: ffff0000c7575700 x21: 000000000000000a x20: ffff8000889c4480 x19: ffff0001adf70480 x18: 000000005b338fc8 x17: ffff8001255ac000 x16: ffff80008ea10000 x15: 0000000000000000 x14: 0000508077721080 x13: 0000000000000001 x12: 0000000000000000 x11: ffff800080156354 x10: 0000000000000003 x9 : 0000000000000000 x8 : 000000000000138c x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801563fc x2 : 0000000000000000 x1 : ffff0000c7575700 x0 : ffff8001255ac000 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+0x1cc/0xd98 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) __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+0x93c/0xbbc kernel/time/timekeeping.c:2903 do_adjtimex+0xc0/0x2f0 kernel/time/timekeeping.c:2914 posix_clock_realtime_adj+0x20/0x30 kernel/time/posix-timers.c:207 do_clock_adjtime+0x120/0x140 kernel/time/posix-timers.c:1154 __do_sys_clock_adjtime kernel/time/posix-timers.c:1166 [inline] __se_sys_clock_adjtime kernel/time/posix-timers.c:1157 [inline] __arm64_sys_clock_adjtime+0x17c/0x2a8 kernel/time/posix-timers.c:1157 __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