RBP: 00007fff14d14b7c R08: 0000000000000000 R09: 00000000000927c0 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000295 R13: 00000000000927c0 R14: 00000000001008e9 R15: 00007fff14d14bd0 watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [syz.8.4459:21815] Modules linked in: irq event stamp: 1099716 hardirqs last enabled at (1099715): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (1099715): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:542 [inline] hardirqs last enabled at (1099715): [] irqentry_exit+0x24d/0x970 kernel/entry/common.c:164 hardirqs last disabled at (1099716): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1061 softirqs last enabled at (1099714): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (1099714): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (1099714): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 softirqs last disabled at (1099699): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (1099699): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (1099699): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 CPU: 1 UID: 0 PID: 21815 Comm: syz.8.4459 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+0x5b0/0x1700 kernel/smp.c:892 Code: 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 89 c6 89 c6 e8 b3 7e 0c 00 45 85 f6 <75> d0 e8 f9 83 0c 00 e8 f4 83 0c 00 83 c3 01 bf 07 00 00 00 48 63 RSP: 0018:ffffc900051ff8a8 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81fbfbfd RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888029f01f00 RBP: ffff8880b84431c0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: ffffed1017088639 R14: 0000000000000001 R15: ffff8880b853c740 FS: 0000000000000000(0000) GS:ffff888124486000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f630a5fed58 CR3: 0000000062de8000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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] tlb_flush_mmu mm/mmu_gather.c:423 [inline] tlb_finish_mmu+0x3fe/0x810 mm/mmu_gather.c:549 exit_mmap+0x454/0xa10 mm/mmap.c:1313 __mmput+0x12a/0x410 kernel/fork.c:1178 mmput+0x67/0x80 kernel/fork.c:1201 exit_mm kernel/exit.c:582 [inline] do_exit+0x8b2/0x2af0 kernel/exit.c:964 do_group_exit+0xd5/0x2a0 kernel/exit.c:1119 __do_sys_exit_group kernel/exit.c:1130 [inline] __se_sys_exit_group kernel/exit.c:1128 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1128 x64_sys_call+0x102c/0x1530 arch/x86/include/generated/asm/syscalls_64.h:232 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: 0033:0x7f300a39ce59 Code: Unable to access opcode bytes at 0x7f300a39ce2f. RSP: 002b:00007fff14d14b18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f300a39ce59 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fff14d14b7c R08: 0000000000000000 R09: 00000000000927c0 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000295 R13: 00000000000927c0 R14: 00000000001008e9 R15: 00007fff14d14bd0 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 21825 Comm: modprobe 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:trace_hrtimer_expire_entry include/trace/events/timer.h:261 [inline] RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1927 [inline] RIP: 0010:__hrtimer_run_queues+0x783/0xa00 kernel/time/hrtimer.c:1994 Code: 84 ed 0f 85 4e fa ff ff e8 ca 2b 14 00 48 8d 3d 33 94 e6 0e 67 48 0f b9 3a e9 38 fa ff ff e8 b4 2b 14 00 e8 1f 6f f8 ff 31 ff <41> 89 c5 89 c6 e8 f3 25 14 00 45 84 ed 0f 85 53 fc ff ff e8 95 2b RSP: 0018:ffffc90000007e88 EFLAGS: 00000046 RAX: 0000000000000001 RBX: ffffffff89990cb0 RCX: ffffffff81f450b0 RDX: 0000000000000000 RSI: ffffffff8c1c4380 RDI: 0000000000000000 RBP: ffff8880b8428600 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff8880382d3300 R13: 0000000000000001 R14: dffffc0000000000 R15: ffff8880b8428650 FS: 0000000000000000(0000) GS:ffff888124386000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f652584b000 CR3: 0000000065129000 CR4: 0000000000350ef0 Call Trace: 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_release+0x19e/0x310 kernel/locking/lockdep.c:5893 Code: ff 65 0f c1 05 1b 85 25 12 83 f8 01 0f 85 28 01 00 00 9c 58 f6 c4 02 0f 85 13 01 00 00 41 f7 c6 00 02 00 00 0f 85 c0 00 00 00 <48> 8b 44 24 10 65 48 2b 05 6d 3d 25 12 0f 85 4e 01 00 00 48 83 c4 RSP: 0018:ffffc9000529e8f8 EFLAGS: 00000206 RAX: 0000000000000046 RBX: ffffffff8e7e5620 RCX: ffffc9000529e904 RDX: 0000000000000004 RSI: ffffffff8def6460 RDI: ffffffff8c1c4400 RBP: ffffffff81b7a1ae R08: 0000000000000001 R09: 0000000000000007 R10: 0000000000000200 R11: 0000000000015153 R12: ffff888029103e00 R13: ffffc9000529e9b0 R14: 0000000000000202 R15: 0000000000000005 rcu_lock_release include/linux/rcupdate.h:310 [inline] rcu_read_unlock include/linux/rcupdate.h:869 [inline] class_rcu_destructor include/linux/rcupdate.h:1181 [inline] unwind_next_frame+0x3c3/0x2090 arch/x86/kernel/unwind_orc.c:495 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x30/0x50 mm/kasan/common.c:57 kasan_record_aux_stack+0xa7/0xc0 mm/kasan/generic.c:556 __call_rcu_common.constprop.0+0xa5/0x9b0 kernel/rcu/tree.c:3131 __kfree_rcu_sheaf+0x320/0x710 mm/slub.c:5986 kfree_rcu_sheaf mm/slab_common.c:1608 [inline] kvfree_call_rcu+0x1be/0x4f0 mm/slab_common.c:1957 ma_free_rcu lib/maple_tree.c:173 [inline] ma_free_rcu+0x40/0x60 lib/maple_tree.c:170 mas_free lib/maple_tree.c:1153 [inline] mas_replace_node lib/maple_tree.c:1595 [inline] mas_wr_node_store+0xd1f/0x11b0 lib/maple_tree.c:3201 mas_wr_store_entry+0xcf4/0x1e80 lib/maple_tree.c:3531 mas_store_prealloc+0x6df/0x1090 lib/maple_tree.c:4936 vma_iter_store_new mm/vma.h:623 [inline] vma_complete+0x9f4/0xf70 mm/vma.c:359 __split_vma+0xa59/0xda0 mm/vma.c:569 vms_gather_munmap_vmas+0x3a5/0x1720 mm/vma.c:1448 __mmap_setup mm/vma.c:2439 [inline] __mmap_region+0x4aa/0x2dd0 mm/vma.c:2753 mmap_region+0x35d/0x620 mm/vma.c:2857 do_mmap+0xc63/0x12f0 mm/mmap.c:560 vm_mmap_pgoff+0x29e/0x470 mm/util.c:581 ksys_mmap_pgoff+0x3cb/0x610 mm/mmap.c:606 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82 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: 0033:0x7f6525876242 Code: 08 00 04 00 00 eb e2 90 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 33 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5e 5b 5d c3 0f 1f 00 c7 05 46 40 01 00 16 00 RSP: 002b:00007fff393c4968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f652559a000 RCX: 00007f6525876242 RDX: 0000000000000005 RSI: 0000000000008000 RDI: 00007f652559a000 RBP: 0000000000000812 R08: 0000000000000000 R09: 0000000000003000 R10: 0000000000000812 R11: 0000000000000206 R12: 00007fff393c49b8 R13: 00007f652584ab20 R14: 00007fff393c4da0 R15: 00000fffe7278930