watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.0.583:7950] Modules linked in: irq event stamp: 70339 hardirqs last enabled at (70338): [] kvm_wait+0x1fb/0x290 arch/x86/kernel/kvm.c:-1 hardirqs last disabled at (70339): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (17308): [] __tipc_sendstream+0x5eb/0x1290 net/tipc/socket.c:1582 softirqs last disabled at (17312): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (17312): [] lock_sock_nested+0x6a/0x100 net/core/sock.c:3755 CPU: 1 UID: 0 PID: 7950 Comm: syz.0.583 Not tainted 6.15.0-syzkaller-g90b83efa6701 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82 Code: 43 d5 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 92 24 00 f3 0f 1e fa fb f4 18 d5 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90003fef458 EFLAGS: 00000246 RAX: ffffffff8171aaed RBX: 0000000000000003 RCX: 0000000000080000 RDX: ffffc9000d17e000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: ffffc90003fef530 R08: ffffffff8fa0b1b7 R09: 1ffffffff1f41636 R10: dffffc0000000000 R11: fffffbfff1f41637 R12: dffffc0000000000 R13: 0000000000000200 R14: 0000000000000003 R15: 1ffff920007fde90 FS: 00007f0cc1ff66c0(0000) GS:ffff888125d66000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3483d8 CR3: 000000007bcc8000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] kvm_wait+0x232/0x290 arch/x86/kernel/kvm.c:1064 pv_wait arch/x86/include/asm/paravirt.h:569 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:466 [inline] __pv_queued_spin_lock_slowpath+0x7bf/0xb60 kernel/locking/qspinlock.c:325 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:557 [inline] queued_spin_lock_slowpath+0x43/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x21f/0x290 kernel/locking/spinlock_debug.c:116 spin_lock_bh include/linux/spinlock.h:356 [inline] lock_sock_nested+0x6a/0x100 net/core/sock.c:3755 lock_sock include/net/sock.h:1667 [inline] __tipc_sendstream+0x640/0x1290 net/tipc/socket.c:1582 tipc_sendstream+0x55/0x70 net/tipc/socket.c:1546 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:727 ____sys_sendmsg+0x505/0x830 net/socket.c:2566 ___sys_sendmsg+0x21f/0x2a0 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] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0cc418e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0cc1ff6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f0cc43b6080 RCX: 00007f0cc418e969 RDX: 0000000000000000 RSI: 0000200000000240 RDI: 000000000000000f RBP: 00007f0cc4210ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f0cc43b6080 R15: 00007ffc7c7b5ad8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7944 Comm: syz.0.583 Not tainted 6.15.0-syzkaller-g90b83efa6701 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:check_preemption_disabled+0x1/0x120 lib/smp_processor_id.c:13 Code: 60 63 e2 8b 48 c7 c6 a0 63 e2 8b eb 1c 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <41> 57 41 56 53 48 83 ec 10 65 48 8b 05 de f0 37 07 48 89 44 24 08 RSP: 0000:ffffc90000007fe0 EFLAGS: 00000046 RAX: c4ac5d197048a300 RBX: ffffc9000403e718 RCX: c4ac5d197048a300 RDX: 0000000000010000 RSI: ffffffff8b899ec0 RDI: ffffffff8be263c0 RBP: 0000000000000000 R08: ffffffff8fa0b1b7 R09: 1ffffffff1f41636 R10: dffffc0000000000 R11: fffffbfff1f41637 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f0cc4f1f6c0(0000) GS:ffff888125c66000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000087f000 CR3: 000000007bcc8000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: irq_exit_rcu+0x15/0x30 kernel/softirq.c:698 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:rcu_read_unlock_special+0x87/0x4c0 kernel/rcu/tree_plugin.h:694 Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 d2 16 f4 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0000:ffffc9000403e7c0 EFLAGS: 00000206 RAX: c4ac5d197048a300 RBX: 1ffff92000807d00 RCX: c4ac5d197048a300 RDX: 0000000000000002 RSI: ffffffff8d96be0f RDI: ffffffff8be263c0 RBP: ffffc9000403e8b8 R08: ffffffff8fa0b1b7 R09: 1ffffffff1f41636 R10: dffffc0000000000 R11: fffffbfff1f41637 R12: ffffffff8e142000 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 __rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438 rcu_read_unlock include/linux/rcupdate.h:873 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19ae/0x2390 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2380 [inline] slab_free mm/slub.c:4642 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4744 skb_release_data+0x62d/0x7c0 net/core/skbuff.c:1087 skb_release_all net/core/skbuff.c:1152 [inline] __kfree_skb net/core/skbuff.c:1166 [inline] sk_skb_reason_drop+0x127/0x170 net/core/skbuff.c:1204 tipc_sk_proto_rcv+0xc17/0x1730 net/tipc/socket.c:-1 tipc_sk_filter_rcv+0x2e7b/0x30b0 net/tipc/socket.c:2350 tipc_sk_enqueue net/tipc/socket.c:2443 [inline] tipc_sk_rcv+0x8a5/0x2ba0 net/tipc/socket.c:2495 tipc_node_xmit+0x1c9/0xe90 net/tipc/node.c:1701 tipc_node_xmit_skb+0xf4/0x150 net/tipc/node.c:1766 tipc_recvstream+0x834/0xe70 net/tipc/socket.c:2093 sock_recvmsg_nosec net/socket.c:1017 [inline] sock_recvmsg+0x229/0x270 net/socket.c:1039 ____sys_recvmsg+0x1c9/0x460 net/socket.c:2786 ___sys_recvmsg+0x1b5/0x510 net/socket.c:2828 __sys_recvmsg net/socket.c:2861 [inline] __do_sys_recvmsg net/socket.c:2867 [inline] __se_sys_recvmsg net/socket.c:2864 [inline] __x64_sys_recvmsg+0x198/0x260 net/socket.c:2864 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0cc418e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0cc4f1f038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007f0cc43b5fa0 RCX: 00007f0cc418e969 RDX: 0000000000001f00 RSI: 0000200000000500 RDI: 000000000000000e RBP: 00007f0cc4210ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f0cc43b5fa0 R15: 00007ffc7c7b5ad8