watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz.5.921:8699] Modules linked in: irq event stamp: 196788 hardirqs last enabled at (196787): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline] hardirqs last enabled at (196787): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:198 hardirqs last disabled at (196788): [] __el1_irq arch/arm64/kernel/entry-common.c:510 [inline] hardirqs last disabled at (196788): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:526 softirqs last enabled at (196770): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (196770): [] put_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:251 [inline] softirqs last enabled at (196770): [] fpsimd_restore_current_state+0x218/0x710 arch/arm64/kernel/fpsimd.c:1805 softirqs last disabled at (196768): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (196768): [] get_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:234 [inline] softirqs last disabled at (196768): [] fpsimd_restore_current_state+0x3c/0x710 arch/arm64/kernel/fpsimd.c:1798 CPU: 1 UID: 0 PID: 8699 Comm: syz.5.921 Not tainted syzkaller #0 PREEMPT 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 : __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 : ffff8000927c7900 x29: ffff8000927c7900 x28: 0000000000000000 x27: dfff800000000000 x26: 0000000000000005 x25: 7fffffffffffffff x24: ffff80008e67a218 x23: ffff7000124f8f2c x22: 7fffffffffffffff x21: 0000000000004002 x20: ffff80008e67a218 x19: 0000000000000000 x18: 1fffe00035c0cc20 x17: ffff80008897b000 x16: ffff800088a2dba0 x15: 0000000000000000 x14: 00005017e7987c00 x13: 0000000000000001 x12: 0000000000000000 x11: ffff800080154b2c x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : 0000000000000000 x6 : 00004c4b40000000 x5 : ffff80008e67a0e8 x4 : 0000000000000008 x3 : ffff800080154bd4 x2 : 0000000000000000 x1 : ffff0000ca273a00 x0 : ffff800125746000 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) 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 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 8705 Comm: syz.7.920 Not tainted syzkaller #0 PREEMPT 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: ffff0000c5309d10 x27: 0000000000000186 x26: ffff0000c5309d08 x25: 1fffe00018a613a1 x24: ffff0000d14aa780 x23: ffff0000c5309d00 x22: dfff800000000000 x21: ffff0001ae0552c0 x20: ffff80008891fecc x19: ffff0001ae0552c0 x18: 0000000000000000 x17: ffff800125721000 x16: ffff80008e980000 x15: 00000000203a3640 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000000 x11: ffff80008a3fcd08 x10: 0000000000000003 x9 : 0000000000000000 x8 : 000000000002e026 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080154bd4 x2 : 0000000000000002 x1 : ffff0000c5309d00 x0 : ffff800125721000 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 write_comp_data+0x80/0x84 kernel/kcov.c:272 (P) unix_copy_addr+0x44/0x100 net/unix/af_unix.c:2560 __unix_dgram_recvmsg+0x3a0/0x898 net/unix/af_unix.c:2617 unix_dgram_recvmsg+0xcc/0xe4 net/unix/af_unix.c:2686 sock_recvmsg_nosec+0x90/0xe8 net/socket.c:1137 ____sys_recvmsg+0x4f8/0x604 net/socket.c:2916 ___sys_recvmsg+0x16c/0x1f4 net/socket.c:2960 do_recvmmsg+0x2a8/0x7e8 net/socket.c:3055 __sys_recvmmsg+0x1e0/0x270 net/socket.c:3129 __do_sys_recvmmsg net/socket.c:3152 [inline] __se_sys_recvmmsg net/socket.c:3145 [inline] __arm64_sys_recvmmsg+0xd0/0xf8 net/socket.c:3145 __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