RBP: 00007f9251215fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9251216038 R14: 00007fff112e9540 R15: 00007fff112e9628 watchdog: BUG: soft lockup - CPU#1 stuck for 241s! [syz.9.2788:19373] Modules linked in: irq event stamp: 742038 hardirqs last enabled at (742037): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:515 [inline] hardirqs last enabled at (742037): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:550 [inline] hardirqs last enabled at (742037): [] irqentry_exit+0x246/0x790 kernel/entry/common.c:164 hardirqs last disabled at (742038): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1061 softirqs last enabled at (742014): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (742014): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (742014): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 softirqs last disabled at (741965): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (741965): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (741965): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 CPU: 1 UID: 0 PID: 19373 Comm: syz.9.2788 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0x58e/0x1700 kernel/smp.c:892 Code: 00 fc ff df 48 8b 54 24 08 49 89 d5 49 89 d4 49 c1 ed 03 41 83 e4 07 49 01 c5 41 83 c4 03 e8 69 7c 0c 00 f3 90 41 0f b6 45 00 <41> 38 c4 7c 08 84 c0 0f 85 63 0f 00 00 8b 45 08 31 ff 83 e0 01 41 RSP: 0018:ffffc90006e97300 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81fbfe7d RDX: ffff88807b400000 RSI: ffffffff81fbfe57 RDI: ffff88807b400000 RBP: ffff8880b8443180 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: ffffed1017088631 R14: 0000000000000001 R15: ffff8880b853c700 FS: 0000000000000000(0000) GS:ffff888124476000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f40f3795ff8 CR3: 00000000ad7cd000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1057 __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 tlb_flush arch/x86/include/asm/tlb.h:23 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:509 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:499 [inline] zap_pte_range mm/memory.c:1945 [inline] zap_pmd_range mm/memory.c:2004 [inline] zap_pud_range mm/memory.c:2032 [inline] zap_p4d_range mm/memory.c:2053 [inline] __zap_vma_range+0x2497/0x4bf0 mm/memory.c:2093 unmap_vmas+0x299/0x5f0 mm/memory.c:2162 exit_mmap+0x1ef/0xa10 mm/mmap.c:1300 __mmput+0x12a/0x410 kernel/fork.c:1178 mmput+0x67/0x80 kernel/fork.c:1201 exit_mm kernel/exit.c:581 [inline] do_exit+0x833/0x2a60 kernel/exit.c:963 do_group_exit+0xd5/0x2a0 kernel/exit.c:1117 get_signal+0x1ec7/0x21e0 kernel/signal.c:3037 arch_do_signal_or_restart+0x91/0x7a0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x4a0 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:318 [inline] do_syscall_64+0x706/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9250f9cdd9 Code: Unable to access opcode bytes at 0x7f9250f9cdaf. RSP: 002b:00007f924f1f60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f9251215fa8 RCX: 00007f9250f9cdd9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9251215fa8 RBP: 00007f9251215fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f9251216038 R14: 00007fff112e9540 R15: 00007fff112e9628 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 19381 Comm: syz.7.2787 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:debug_lockdep_rcu_enabled+0x0/0x40 kernel/rcu/update.c:319 Code: 00 00 8b 44 24 04 eb b2 89 44 24 04 e8 a9 fa ff ff 8b 44 24 04 eb aa 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 8b 05 22 28 4f 05 85 c0 74 20 8b 05 a0 5a 4f 05 85 c0 RSP: 0018:ffffc90000007dd0 EFLAGS: 00000046 RAX: 0000000080010000 RBX: 0000000000000001 RCX: ffffffff895e1e56 RDX: ffff88802fe2dc40 RSI: ffffffff895e2174 RDI: ffff88802fe2dc40 RBP: ffff888053bb7800 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: 18acc8c87fa2a188 R14: ffff888053bb6400 R15: ffff888053bb6400 FS: 00007f15119bb6c0(0000) GS:ffff888124376000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000e6000 CR3: 0000000042642000 CR4: 0000000000350ef0 Call Trace: rcu_read_unlock include/linux/rcupdate.h:867 [inline] advance_sched+0x745/0xd20 net/sched/sch_taprio.c:994 __run_hrtimer kernel/time/hrtimer.c:1930 [inline] __hrtimer_run_queues+0x470/0xa00 kernel/time/hrtimer.c:1994 hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2113 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] __sysvec_apic_timer_interrupt+0x10b/0x460 arch/x86/kernel/apic/apic.c:1067 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_is_held_type+0xf5/0x140 kernel/locking/lockdep.c:5945 Code: ff ff ff ff 65 0f c1 15 f1 45 82 08 83 fa 01 8b 44 24 04 75 2d 9c 5a 80 e6 02 75 47 41 f7 c5 00 02 00 00 74 01 fb 48 83 c4 08 <5b> 5d 41 5c 41 5d 41 5e 41 5f e9 47 9f 87 f5 e9 42 9f 87 f5 31 c0 RSP: 0018:ffffc9000589f610 EFLAGS: 00000292 RAX: 0000000000000000 RBX: ffffffff8e7e5420 RCX: 0000000000000001 RDX: 0000000000000046 RSI: ffffffff8def883d RDI: ffffffff8c1c3500 RBP: ffff88802fe2dc40 R08: ffffffff8a30dce5 R09: 0000000000000000 R10: ffffc9000589f850 R11: 0000000000000000 R12: 00000000ffffffff R13: 0000000000000246 R14: dffffc0000000000 R15: 0000000000000000 lock_is_held include/linux/lockdep.h:249 [inline] __might_resched+0x29f/0x330 kernel/sched/core.c:9125 __mutex_lock_common kernel/locking/mutex.c:623 [inline] __mutex_lock+0x10e/0x1b10 kernel/locking/mutex.c:820 __unix_dgram_recvmsg+0x255/0xc30 net/unix/af_unix.c:2584 unix_dgram_recvmsg+0xcd/0x100 net/unix/af_unix.c:2686 sock_recvmsg_nosec net/socket.c:1137 [inline] ____sys_recvmsg+0x5b3/0x640 net/socket.c:2916 ___sys_recvmsg+0x16a/0x1a0 net/socket.c:2960 do_recvmmsg+0x301/0x760 net/socket.c:3055 __sys_recvmmsg net/socket.c:3129 [inline] __do_sys_recvmmsg net/socket.c:3152 [inline] __se_sys_recvmmsg net/socket.c:3145 [inline] __x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3145 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1510b9cdd9 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:00007f15119bb028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007f1510e16090 RCX: 00007f1510b9cdd9 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000004 RBP: 00007f1510c32d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1510e16128 R14: 00007f1510e16090 R15: 00007ffdc328b7f8