watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz.5.138:7712] Modules linked in: irq event stamp: 6569 hardirqs last enabled at (6568): [] irqentry_exit+0xd8/0x108 kernel/entry/common.c:214 hardirqs last disabled at (6569): [] __enter_from_kernel_mode arch/arm64/kernel/entry-common.c:43 [inline] hardirqs last disabled at (6569): [] enter_from_kernel_mode+0x14/0x34 arch/arm64/kernel/entry-common.c:50 softirqs last enabled at (136): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (136): [] xfrm_find_acq+0xa4/0xcc net/xfrm/xfrm_state.c:2355 softirqs last disabled at (138): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (138): [] xfrm_alloc_spi+0xb0/0xd04 net/xfrm/xfrm_state.c:2572 CPU: 0 UID: 0 PID: 7712 Comm: syz.5.138 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : xfrm_state_lookup_spi_proto net/xfrm/xfrm_state.c:1707 [inline] pc : xfrm_alloc_spi+0x4c0/0xd04 net/xfrm/xfrm_state.c:2589 lr : xfrm_state_lookup_spi_proto net/xfrm/xfrm_state.c:1707 [inline] lr : xfrm_alloc_spi+0x4c0/0xd04 net/xfrm/xfrm_state.c:2589 sp : ffff80009d2a6f40 x29: ffff80009d2a7040 x28: 0000000000000033 x27: 0000000000000003 x26: ffff0000cc38c880 x25: ffff0000cc38dd20 x24: dfff800000000000 x23: ffff0000f64b0440 x22: ffff0000cc38dd20 x21: 00000000000018c0 x20: 00000000881f0100 x19: ffff0000f64b0468 x18: 0000000000000000 x17: 00000000ffff0000 x16: ffff80008b065bd0 x15: ffff700013a54dd0 x14: 1ffff00013a54dd0 x13: 0000000000000004 x12: ffffffffffffffff x11: 0000000000080000 x10: 000000000007ffff x9 : ffff8000a4179000 x8 : 0000000000080000 x7 : ffff800089dc6ba0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : 00000000881f0100 x0 : 0000000060890100 Call trace: xfrm_state_lookup_spi_proto net/xfrm/xfrm_state.c:1707 [inline] (P) xfrm_alloc_spi+0x4c0/0xd04 net/xfrm/xfrm_state.c:2589 (P) xfrm_alloc_userspi+0x55c/0x9c8 net/xfrm/xfrm_user.c:1873 xfrm_user_rcv_msg+0x588/0x7c4 net/xfrm/xfrm_user.c:3501 netlink_rcv_skb+0x220/0x3fc net/netlink/af_netlink.c:2552 xfrm_netlink_rcv+0x80/0x9c net/xfrm/xfrm_user.c:3523 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x694/0x8c4 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x648/0x930 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg net/socket.c:729 [inline] ____sys_sendmsg+0x490/0x7b8 net/socket.c:2614 ___sys_sendmsg+0x204/0x278 net/socket.c:2668 __sys_sendmsg net/socket.c:2700 [inline] __do_sys_sendmsg net/socket.c:2705 [inline] __se_sys_sendmsg net/socket.c:2703 [inline] __arm64_sys_sendmsg+0x184/0x238 net/socket.c:2703 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7813 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 03400005 (nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x138/0xaec kernel/locking/qspinlock.c:197 lr : queued_spin_lock_slowpath+0x144/0xaec kernel/locking/qspinlock.c:197 sp : ffff800097c27900 x29: ffff800097c279a0 x28: 1fffe00019871c29 x27: 1fffe0001e480b72 x26: ffff0000f2405b80 x25: dfff800000000000 x24: ffff700012f84f24 x23: 0000000000000000 x22: ffff0000f2405b90 x21: ffff0000cc38e148 x20: ffff0000cc38e150 x19: ffff0000cc38e140 x18: 0000000000000000 x17: ffff80010c40c000 x16: ffff800080537d14 x15: 0000000000000001 x14: 1fffe00019871c28 x13: 0000000000000000 x12: 0000000000000000 x11: ffff600019871c29 x10: dfff800000000000 x9 : 0000000000000000 x8 : 0000000000000001 x7 : ffff800089dab498 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008b0885f8 x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000001 Call trace: __cmpwait_case_8 arch/arm64/include/asm/cmpxchg.h:229 [inline] (P) __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] (P) queued_spin_lock_slowpath+0x138/0xaec kernel/locking/qspinlock.c:197 (P) queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x2a8/0x2cc kernel/locking/spinlock_debug.c:116 __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline] _raw_spin_lock+0x50/0x60 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] __xfrm_state_delete+0xac/0xb58 net/xfrm/xfrm_state.c:818 xfrm_timer_handler+0x16c/0x80c net/xfrm/xfrm_state.c:716 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x41c/0xb78 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x160/0x400 kernel/time/hrtimer.c:1842 handle_softirqs+0x328/0xc88 kernel/softirq.c:579 __do_softirq+0x14/0x20 kernel/softirq.c:613 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:68 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:891 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:73 invoke_softirq kernel/softirq.c:460 [inline] __irq_exit_rcu+0x1b0/0x478 kernel/softirq.c:680 irq_exit_rcu+0x14/0x84 kernel/softirq.c:696 __el1_irq arch/arm64/kernel/entry-common.c:520 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:532 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:537 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:592 ma_data_end lib/maple_tree.c:1434 [inline] (P) mas_next_node+0x8ac/0xb90 lib/maple_tree.c:4658 (P) mas_next_slot+0x384/0xbd0 lib/maple_tree.c:4729 mas_find+0x924/0xb94 lib/maple_tree.c:6062 vma_next include/linux/mm.h:866 [inline] dup_mmap+0xcec/0x16b4 mm/mmap.c:1750 dup_mm kernel/fork.c:1485 [inline] copy_mm+0x100/0x438 kernel/fork.c:1537 copy_process+0x1520/0x31ec kernel/fork.c:2175 kernel_clone+0x1d8/0x84c kernel/fork.c:2605 __do_sys_clone kernel/fork.c:2748 [inline] __se_sys_clone kernel/fork.c:2716 [inline] __arm64_sys_clone+0x144/0x1a0 kernel/fork.c:2716 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596