watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.0:7859] Modules linked in: irq event stamp: 25946045 hardirqs last enabled at (25946044): [] __local_bh_enable_ip+0x1ec/0x35c kernel/softirq.c:412 hardirqs last disabled at (25946045): [] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline] hardirqs last disabled at (25946045): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668 softirqs last enabled at (956): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (956): [] tipc_skb_peek_port net/tipc/msg.h:1235 [inline] softirqs last enabled at (956): [] tipc_sk_rcv+0x2d8/0x2294 net/tipc/socket.c:2489 softirqs last disabled at (958): [] spin_trylock_bh include/linux/spinlock.h:411 [inline] softirqs last disabled at (958): [] tipc_sk_rcv+0x2f4/0x2294 net/tipc/socket.c:2494 CPU: 0 UID: 0 PID: 7859 Comm: syz-executor.0 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 : ffff8000a34163f0 x29: ffff8000a3416400 x28: 000000006d594d14 x27: ffff8000a34165c0 x26: ffff0000d9d4b1a0 x25: dfff800000000000 x24: 0000000000000001 x23: dfff800000000000 x22: 1fffe00019a853d1 x21: ffff80008a9df938 x20: 0000000000000201 x19: ffff0000cd429e88 x18: 00000000ffffffff x17: ffff800093376000 x16: ffff80008051f01c x15: 0000000000000001 x14: 1fffe000198b2860 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093175c08 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000018be7bc x7 : ffff80008a9ec020 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008ec5712e x0 : ffff80010c8be000 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_trylock_bh include/linux/spinlock_api_smp.h:177 [inline] _raw_spin_trylock_bh+0x68/0x80 kernel/locking/spinlock.c:146 spin_trylock_bh include/linux/spinlock.h:411 [inline] tipc_sk_rcv+0x2f4/0x2294 net/tipc/socket.c:2494 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 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7860 Comm: syz-executor.0 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 : ffff8000a3407600 x29: ffff8000a34076a0 x28: 1fffe000198b2861 x27: 1fffe00019a857a2 x26: ffff0000cd42bd00 x25: dfff800000000000 x24: ffff700014680ec4 x23: 0000000000000000 x22: ffff0000cd42bd10 x21: ffff0000cc594308 x20: ffff0000cc594310 x19: ffff0000cc594300 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008052b1e4 x15: 0000000000000001 x14: 1fffe000198b2860 x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000198b2861 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_sendstream+0x50/0x84 net/tipc/socket.c:1545 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg net/socket.c:727 [inline] ____sys_sendmsg+0x490/0x7b8 net/socket.c:2566 ___sys_sendmsg+0x204/0x278 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __arm64_sys_sendmsg+0x184/0x238 net/socket.c:2655 __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