watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz.6.1214:11098] Modules linked in: irq event stamp: 78964 hardirqs last enabled at (78963): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (78963): [] arm64_exit_to_kernel_mode+0x80/0x94 arch/arm64/kernel/entry-common.c:62 hardirqs last disabled at (78964): [] __el1_irq arch/arm64/kernel/entry-common.c:510 [inline] hardirqs last disabled at (78964): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:526 softirqs last enabled at (78958): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (78958): [] handle_softirqs+0xbc4/0xd34 kernel/softirq.c:650 softirqs last disabled at (78901): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 1 UID: 0 PID: 11098 Comm: syz.6.1214 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 : ffff800094aa72e0 x29: ffff800094aa73f0 x28: dfff800000000000 x27: ffff0001ae1305c0 x26: 0000000000000011 x25: 0000000000000000 x24: ffff8000888ef688 x23: ffffffffffffffff x22: 1fffe00035c260b8 x21: 1fffe00035c260b9 x20: ffff0001ae1119a8 x19: ffff0001ae1305c8 x18: 0000000000000000 x17: 0000000000000000 x16: 7fffffffffffffff x15: ffff800094aa7920 x14: 00000000ffff8000 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000805a3760 x2 : 0000000000000000 x1 : ffff00010f7cba00 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:130 aarch64_insn_copy+0x3c/0x50 arch/arm64/kernel/patching.c:161 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:2550 [inline] __bpf_prog_select_runtime+0x34c/0x684 kernel/bpf/core.c:2619 bpf_check+0x2c4c/0x3c88 kernel/bpf/verifier.c:20174 bpf_prog_load+0xf40/0x1434 kernel/bpf/syscall.c:3082 __sys_bpf+0x3f4/0x5f0 kernel/bpf/syscall.c:6248 __do_sys_bpf kernel/bpf/syscall.c:6361 [inline] __se_sys_bpf kernel/bpf/syscall.c:6359 [inline] __arm64_sys_bpf+0x80/0x98 kernel/bpf/syscall.c:6359 __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:740 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759 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: 11090 Comm: syz.1.1211 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 : ffff80008e8e7ee0 x29: ffff80008e8e7f80 x28: ffff0000f01d3a10 x27: 0000000000000386 x26: ffff0000f01d3a08 x25: 1fffe0001e03a741 x24: ffff80008e5d4218 x23: ffff0000f01d3a00 x22: dfff800000000000 x21: ffff0001ae1092c0 x20: ffff80008888fecc x19: ffff0001ae1092c0 x18: 00000000ab39869f x17: ffff800125865000 x16: ffff80008e8e0000 x15: 0000000000000000 x14: 00005080780aa700 x13: 0000000000000001 x12: 0000000000000000 x11: ffff800080154b2c x10: 0000000000000003 x9 : 0000000000000000 x8 : 0000000000000e18 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080154bd4 x2 : 0000000000000000 x1 : ffff0000f01d3a00 x0 : ffff800125865000 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:514 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:526 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:531 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:571 [inline] __do_adjtimex+0x508/0xbb0 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/0x2ac 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+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:740 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594