watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz.0.805:9590] CPU#0 Utilization every 4s during lockup: #1: 100% system, 0% softirq, 0% hardirq, 0% idle #2: 100% system, 0% softirq, 1% hardirq, 0% idle #3: 100% system, 0% softirq, 0% hardirq, 0% idle #4: 100% system, 0% softirq, 1% hardirq, 0% idle #5: 100% system, 0% softirq, 0% hardirq, 0% idle Modules linked in: irq event stamp: 5487 hardirqs last enabled at (5486): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (5486): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (5487): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (5487): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (900): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (900): [] release_sock+0x154/0x1b8 net/core/sock.c:3646 softirqs last disabled at (906): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (906): [] lock_sock_nested+0x74/0x11c net/core/sock.c:3625 CPU: 0 UID: 0 PID: 9590 Comm: syz.0.805 Not tainted 6.13.0-rc4-syzkaller-00078-g059dd502b263 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : queued_spin_lock_slowpath+0x15c/0xd04 kernel/locking/qspinlock.c:380 lr : queued_spin_lock_slowpath+0x168/0xd04 kernel/locking/qspinlock.c:380 sp : ffff80009c4176a0 x29: ffff80009c417760 x28: 1fffe00019a0cab8 x27: dfff800000000000 x26: 1ffff00013882f00 x25: ffff80009c4176e0 x24: dfff800000000000 x23: ffff80009c417720 x22: ffff700013882edc x21: 0000000000000001 x20: 1ffff00013882ee4 x19: ffff0000cd0655c0 x18: 0000000000000000 x17: 0000000000000000 x16: ffff800080be9174 x15: 0000000000000001 x14: 1fffe00019a0cab8 x13: 0000000000000000 x12: 0000000000000000 x11: ffff600019a0cab9 x10: 1fffe00019a0cab8 x9 : 0000000000000000 x8 : 0000000000000001 x7 : ffff800088d97ea0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008acd1fc0 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+0x15c/0xd04 kernel/locking/qspinlock.c:380 (P) queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x2ec/0x334 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+0x74/0x11c net/core/sock.c:3625 lock_sock include/net/sock.h:1623 [inline] tipc_sendstream+0x50/0x84 net/tipc/socket.c:1545 sock_sendmsg_nosec net/socket.c:711 [inline] __sock_sendmsg net/socket.c:726 [inline] ____sys_sendmsg+0x56c/0x840 net/socket.c:2583 ___sys_sendmsg net/socket.c:2637 [inline] __sys_sendmsg+0x238/0x304 net/socket.c:2669 __do_sys_sendmsg net/socket.c:2674 [inline] __se_sys_sendmsg net/socket.c:2672 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2672 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 9589 Comm: syz.0.805 Not tainted 6.13.0-rc4-syzkaller-00078-g059dd502b263 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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+0x228/0x44c kernel/softirq.c:396 lr : __local_bh_enable_ip+0x224/0x44c kernel/softirq.c:394 sp : ffff80009c1f62d0 x29: ffff80009c1f62e0 x28: ffff80009c1f64c0 x27: ffff0000e6cb1e40 x26: dfff800000000000 x25: ffff80009c1f6850 x24: 0000000000000001 x23: 1fffe0001a5443c9 x22: dfff800000000000 x21: ffff80008a7450f0 x20: 0000000000000202 x19: ffff0000d2a21e48 x18: ffff80009c1f6340 x17: 0000000000020833 x16: ffff80008044451c x15: 0000000000000001 x14: 1fffe00019a0cab8 x13: ffff80009c1f8000 x12: 0000000000000003 x11: 0000000000000201 x10: 0000000000000003 x9 : 0000000000000000 x8 : 000000000211fb42 x7 : ffff80008a751d7c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000002 x1 : ffff80008ad56ae0 x0 : ffff8001252ab000 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+0x228/0x44c kernel/softirq.c:394 (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+0x36c/0x1878 net/tipc/socket.c:2494 tipc_node_xmit+0x1b0/0xdb4 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x28c/0x3a4 net/tipc/node.c:1781 tipc_sk_rcv+0x1268/0x1878 net/tipc/socket.c:2499 tipc_node_xmit+0x1b0/0xdb4 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+0x13d4/0x2c6c net/tipc/socket.c:2362 tipc_sk_enqueue net/tipc/socket.c:2443 [inline] tipc_sk_rcv+0x824/0x1878 net/tipc/socket.c:2495 tipc_node_xmit+0x1b0/0xdb4 net/tipc/node.c:1701 tipc_node_xmit_skb net/tipc/node.c:1766 [inline] tipc_node_distr_xmit+0x28c/0x3a4 net/tipc/node.c:1781 tipc_sk_backlog_rcv+0x164/0x214 net/tipc/socket.c:2410 sk_backlog_rcv include/net/sock.h:1121 [inline] __release_sock+0x1a8/0x3d8 net/core/sock.c:3083 release_sock+0x68/0x1b8 net/core/sock.c:3637 sk_setsockopt+0xc7c/0x3150 sock_setsockopt+0x68/0x80 net/core/sock.c:1634 do_sock_setsockopt+0x238/0x4e0 net/socket.c:2309 __sys_setsockopt net/socket.c:2338 [inline] __do_sys_setsockopt net/socket.c:2344 [inline] __se_sys_setsockopt net/socket.c:2341 [inline] __arm64_sys_setsockopt+0x170/0x1e0 net/socket.c:2341 __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600