tipc: RX(1000001): key[1] is activated watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [syz.9.2776:16277] Modules linked in: irq event stamp: 1175320 hardirqs last enabled at (1175319): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (1175319): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:542 [inline] hardirqs last enabled at (1175319): [] irqentry_exit+0x24d/0xa00 kernel/entry/common.c:167 hardirqs last disabled at (1175320): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (1175318): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (1175318): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (1175318): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 softirqs last disabled at (1175193): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (1175193): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (1175193): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 CPU: 1 UID: 0 PID: 16277 Comm: syz.9.2776 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0x5b5/0x1870 kernel/smp.c:912 Code: 00 f3 90 41 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 a8 10 00 00 8b 45 08 31 ff 83 e0 01 41 89 c6 89 c6 e8 fe 95 0c 00 45 85 f6 <75> d0 e8 84 9b 0c 00 e8 7f 9b 0c 00 83 c3 01 bf 07 00 00 00 48 63 RSP: 0018:ffffc900040cf548 EFLAGS: 00000202 RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffffffff81fdb6d2 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8880330b8000 RBP: ffff8880b84434e0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: ffffed101708869d R14: 0000000000000001 R15: ffff8880b853c9c0 FS: 00007f1191c7d6c0(0000) GS:ffff888123eec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000bd038 CR3: 0000000075e8c000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1077 __flush_tlb_multi arch/x86/include/asm/paravirt.h:46 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline] flush_tlb_mm_range+0x45f/0x16f0 arch/x86/mm/tlb.c:1451 flush_tlb_page arch/x86/include/asm/tlbflush.h:345 [inline] ptep_clear_flush+0x148/0x170 mm/pgtable-generic.c:104 wp_page_copy mm/memory.c:3941 [inline] do_wp_page+0x12a4/0x4350 mm/memory.c:4336 handle_pte_fault mm/memory.c:6395 [inline] __handle_mm_fault+0x1ab6/0x2a00 mm/memory.c:6517 handle_mm_fault+0x37b/0xa30 mm/memory.c:6686 do_user_addr_fault+0x74c/0x12f0 arch/x86/mm/fault.c:1394 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0010:__put_user_4+0xd/0x30 arch/x86/lib/putuser.S:94 Code: 66 89 01 31 c9 0f 01 ca e9 cb 89 57 f5 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 cb 48 c1 fb 3f 48 09 d9 0f 01 cb <89> 01 31 c9 0f 01 ca e9 a2 89 57 f5 0f 1f 80 00 00 00 00 90 90 90 RSP: 0018:ffffc900040cfcd0 EFLAGS: 00050202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00002000000bd038 RDX: 0000000000080000 RSI: ffffffff825cbe11 RDI: ffffffff8c3ff580 RBP: 0000000000000000 R08: 0000000000000001 R09: 00000000000001cd R10: 0000000000000200 R11: 0000000000000000 R12: 0000000000040000 R13: 0000000000000317 R14: 0000000000000318 R15: 00002000000bd000 __sys_sendmmsg+0x240/0x440 net/socket.c:2832 __do_sys_sendmmsg net/socket.c:2854 [inline] __se_sys_sendmmsg net/socket.c:2851 [inline] __x64_sys_sendmmsg+0x9c/0x100 net/socket.c:2851 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1190d9e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1191c7d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f1191025fa0 RCX: 00007f1190d9e0d9 RDX: 0000000000000318 RSI: 00002000000bd000 RDI: 0000000000000004 RBP: 00007f1190e35024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1191026038 R14: 00007f1191025fa0 R15: 00007fffd4b44168 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 16273 Comm: syz.3.2777 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0010:lock_acquire+0x8/0x370 kernel/locking/lockdep.c:5828 Code: 24 20 e9 33 fd ff ff 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 f3 0f 1e fa 41 57 41 56 <41> 89 f6 41 55 45 89 c5 41 54 41 89 cc 55 48 89 fd 53 89 d3 48 83 RSP: 0018:ffffc90000007d38 EFLAGS: 00000046 RAX: 0000000000010002 RBX: ffffffff9b95d868 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9b95d880 RBP: 0000000000000012 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff88807db3e300 R14: 0000000000000001 R15: 1ffff92000000fb2 FS: 00007fb5523f66c0(0000) GS:ffff888123dec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e922ff8 CR3: 0000000037056000 CR4: 0000000000350ef0 Call Trace: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:166 debug_object_activate+0x144/0x4b0 lib/debugobjects.c:873 debug_hrtimer_activate kernel/time/hrtimer.c:485 [inline] debug_activate kernel/time/hrtimer.c:528 [inline] enqueue_hrtimer+0x75/0x2f0 kernel/time/hrtimer.c:1109 __run_hrtimer kernel/time/hrtimer.c:2048 [inline] __hrtimer_run_queues+0x6ed/0x9c0 kernel/time/hrtimer.c:2096 hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2215 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline] __sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:__sanitizer_cov_trace_pc+0x58/0x70 kernel/kcov.c:223 Code: ff 8b 82 24 17 00 00 85 c0 74 f1 8b 82 f8 16 00 00 83 f8 02 75 e6 48 8b 8a 00 17 00 00 8b 92 fc 16 00 00 48 8b 01 48 83 c0 01 <48> 39 d0 73 cd 48 89 01 48 89 34 c1 e9 42 ee 05 ff 0f 1f 80 00 00 RSP: 0018:ffffc900036e76f8 EFLAGS: 00000216 RAX: 0000000000080000 RBX: ffffc900036e7938 RCX: ffffc90007891000 RDX: 0000000000080000 RSI: ffffffff89864bdf RDI: ffff888035012200 RBP: 1ffff920006dcee0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffc900036e7d88 R14: ffff888035012200 R15: ffff8880244af358 __scm_recv_common.isra.0+0x6f/0x520 net/core/scm.c:504 scm_recv_unix+0x99/0x400 net/core/scm.c:545 __unix_dgram_recvmsg+0x744/0xc30 net/unix/af_unix.c:2662 unix_dgram_recvmsg+0xcd/0x100 net/unix/af_unix.c:2682 sock_recvmsg_nosec net/socket.c:1126 [inline] ____sys_recvmsg+0x5eb/0x670 net/socket.c:2902 ___sys_recvmsg+0x16a/0x1a0 net/socket.c:2946 do_recvmmsg+0x2f3/0x740 net/socket.c:3041 __sys_recvmmsg net/socket.c:3115 [inline] __do_sys_recvmmsg net/socket.c:3138 [inline] __se_sys_recvmmsg net/socket.c:3131 [inline] __x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3131 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb55419e0d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb5523f6028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007fb554426090 RCX: 00007fb55419e0d9 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003 RBP: 00007fb554235024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb554426128 R14: 00007fb554426090 R15: 00007fffd7e859f8