watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz.4.1726:12415] Modules linked in: irq event stamp: 18749 hardirqs last enabled at (18748): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:86 [inline] hardirqs last enabled at (18748): [] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:96 hardirqs last disabled at (18749): [] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline] hardirqs last disabled at (18749): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668 softirqs last enabled at (14288): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (14298): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (14298): [] lock_sock_nested+0x70/0x118 net/core/sock.c:3755 CPU: 0 UID: 0 PID: 12415 Comm: syz.4.1726 Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 00400005 (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 : ffff8000a11978a0 x29: ffff8000a1197940 x28: 1fffe0001a574c01 x27: 1fffe0001b5e43d2 x26: ffff0000daf21e80 x25: dfff800000000000 x24: ffff700014232f18 x23: 0000000000000001 x22: ffff0000daf21e90 x21: ffff0000d2ba6008 x20: ffff0000d2ba6010 x19: ffff0000d2ba6000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008052b1e4 x15: 0000000000000001 x14: 1fffe0001a574c00 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001a574c01 x10: dfff800000000000 x9 : 0000000000000000 x8 : 0000000000000001 x7 : ffff8000891b375c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008af23ff4 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_bh include/linux/spinlock_api_smp.h:127 [inline] _raw_spin_lock_bh+0x50/0x60 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x70/0x118 net/core/sock.c:3755 lock_sock include/net/sock.h:1667 [inline] tipc_release+0xac/0x1ac8 net/tipc/socket.c:637 __sock_release net/socket.c:647 [inline] sock_close+0xa0/0x1e4 net/socket.c:1391 __fput+0x340/0x75c fs/file_table.c:465 ____fput+0x20/0x58 fs/file_table.c:493 task_work_run+0x1dc/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x174/0x1f4 arch/arm64/kernel/entry-common.c:155 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 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: 12417 Comm: syz.4.1726 Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : should_resched arch/arm64/include/asm/preempt.h:79 [inline] pc : __local_bh_enable_ip+0x1f0/0x35c kernel/softirq.c:414 lr : __local_bh_enable_ip+0x1ec/0x35c kernel/softirq.c:412 sp : ffff8000a10a63f0 x29: ffff8000a10a6400 x28: 0000000012201b8e x27: ffff8000a10a65c0 x26: ffff0000f73f8aa0 x25: dfff800000000000 x24: 0000000000000001 x23: dfff800000000000 x22: 1fffe00019877001 x21: ffff80008a9df91c x20: 0000000000000201 x19: ffff0000cc3b8008 x18: 00000000ffffffff x17: ffff800093376000 x16: ffff80008051f01c x15: 0000000000000001 x14: 1ffff00014214d2b x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093175c08 x10: 0000000000000003 x9 : 0000000000000000 x8 : 0000000001e65f92 x7 : ffff80008a9df7cc x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008ec5712e x0 : ffff80010c8e2000 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) __local_bh_enable_ip+0x1f0/0x35c kernel/softirq.c:412 (P) __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline] _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:396 [inline] tipc_skb_peek_port net/tipc/msg.h:1235 [inline] tipc_sk_rcv+0x2d8/0x2294 net/tipc/socket.c:2489 tipc_node_xmit+0x18c/0xc9c net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x248/0x33c net/tipc/node.c:1781 tipc_sk_rcv+0x1df0/0x2294 net/tipc/socket.c:2499 tipc_node_xmit+0x18c/0xc9c net/tipc/node.c:1701 tipc_sk_push_backlog net/tipc/socket.c:1312 [inline] tipc_sk_filter_connect net/tipc/socket.c:2253 [inline] tipc_sk_filter_rcv+0x1220/0x277c net/tipc/socket.c:2362 tipc_sk_enqueue net/tipc/socket.c:2443 [inline] tipc_sk_rcv+0x628/0x2294 net/tipc/socket.c:2495 tipc_node_xmit+0x18c/0xc9c net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x248/0x33c net/tipc/node.c:1781 tipc_sk_backlog_rcv+0x164/0x214 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1148 [inline] __release_sock+0x19c/0x39c net/core/sock.c:3213 release_sock+0x60/0x1ac net/core/sock.c:3767 sockopt_release_sock net/core/sock.c:1159 [inline] sk_setsockopt+0x229c/0x2944 net/core/sock.c:1676 sock_setsockopt+0x68/0x80 net/core/sock.c:1683 do_sock_setsockopt+0x19c/0x328 net/socket.c:2292 __sys_setsockopt net/socket.c:2321 [inline] __do_sys_setsockopt net/socket.c:2327 [inline] __se_sys_setsockopt net/socket.c:2324 [inline] __arm64_sys_setsockopt+0x170/0x1e0 net/socket.c:2324 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596