ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 watchdog: BUG: soft lockup - CPU#1 stuck for 262s! [syz-executor:13541] Modules linked in: irq event stamp: 1647500 hardirqs last enabled at (1647499): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:310 hardirqs last disabled at (1647500): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (1647482): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (1647482): [] handle_softirqs+0x5be/0x8e0 kernel/softirq.c:607 softirqs last disabled at (1647471): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (1647471): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (1647471): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 13541 Comm: syz-executor Not tainted 6.16.0-rc4-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: 96 58 55 00 48 89 df 5b e9 8d e0 5a 00 be 03 00 00 00 5b e9 72 ef 1d 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 34 24 65 48 8b 15 18 50 10 12 65 8b 05 29 50 10 RSP: 0018:ffffc90004417748 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff8880b84420a0 RCX: ffffffff81b000ed RDX: ffff88801fb58000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000 R13: 0000000000000003 R14: ffffed1017088415 R15: ffff8880b853b6c0 FS: 000055556702e500(0000) GS:ffff888124859000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3cc7b1 CR3: 0000000076d77000 CR4: 0000000000350ef0 Call Trace: native_pause arch/x86/include/asm/vdso/processor.h:13 [inline] cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline] csd_lock_wait kernel/smp.c:340 [inline] smp_call_function_many_cond+0xd79/0x1510 kernel/smp.c:885 on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1052 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline] flush_tlb_mm_range+0x4a0/0x1790 arch/x86/mm/tlb.c:1451 dup_mmap+0xfa2/0x21d0 mm/mmap.c:1877 dup_mm kernel/fork.c:1477 [inline] copy_mm kernel/fork.c:1529 [inline] copy_process+0x4081/0x76a0 kernel/fork.c:2169 kernel_clone+0xfc/0x960 kernel/fork.c:2599 __do_sys_clone+0xce/0x120 kernel/fork.c:2742 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f343ff85193 Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00 RSP: 002b:00007ffc6f35fab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f343ff85193 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001 R10: 000055556702e7d0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000061 R14: 00000000000df036 R15: 00007ffc6f35fc50 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 16681 Comm: syz.9.2789 Not tainted 6.16.0-rc4-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: 96 58 55 00 48 89 df 5b e9 8d e0 5a 00 be 03 00 00 00 5b e9 72 ef 1d 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 34 24 65 48 8b 15 18 50 10 12 65 8b 05 29 50 10 RSP: 0018:ffffc90000007d88 EFLAGS: 00000046 RAX: 0000000080010002 RBX: ffff88807e9d0340 RCX: ffffffff89903522 RDX: ffff8880267c0000 RSI: ffffffff8990f0f6 RDI: 0000000000000004 RBP: ffff888034b18400 R08: 0000000000000004 R09: 0000000000000002 R10: 0000000000000002 R11: 0000000000000001 R12: 185d09d988000000 R13: 185d09d988000000 R14: 0000000000000002 R15: ffff888055385010 FS: 0000000000000000(0000) GS:ffff888124759000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f95a41ec9f4 CR3: 0000000032ae2000 CR4: 0000000000350ef0 Call Trace: advance_sched+0x5fb/0xc80 net/sched/sch_taprio.c:980 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x202/0xad0 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x10b/0x3f0 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216 Code: e9 8d e0 5a 00 be 03 00 00 00 5b e9 72 ef 1d 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 <65> 48 8b 15 18 50 10 12 65 8b 05 29 50 10 12 a9 00 01 ff 00 74 1d RSP: 0018:ffffc90013baf5b0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc90013bafa98 RCX: ffffffff820bc2dd RDX: ffff8880267c0000 RSI: ffffffff820bc2ec RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000001 R13: 00000000000000b9 R14: ffff888044454000 R15: 00000000000000b8 __tlb_remove_folio_pages_size.constprop.0+0xcc/0x560 mm/mmu_gather.c:185 zap_present_folio_ptes mm/memory.c:1534 [inline] zap_present_ptes mm/memory.c:1590 [inline] do_zap_pte_range mm/memory.c:1691 [inline] zap_pte_range mm/memory.c:1735 [inline] zap_pmd_range mm/memory.c:1827 [inline] zap_pud_range mm/memory.c:1856 [inline] zap_p4d_range mm/memory.c:1877 [inline] unmap_page_range+0x16e1/0x4350 mm/memory.c:1898 unmap_single_vma.constprop.0+0x153/0x240 mm/memory.c:1941 unmap_vmas+0x218/0x470 mm/memory.c:1985 exit_mmap+0x1b9/0xb90 mm/mmap.c:1284 __mmput+0x12a/0x410 kernel/fork.c:1121 mmput+0x62/0x70 kernel/fork.c:1144 exit_mm kernel/exit.c:581 [inline] do_exit+0x7c4/0x2bd0 kernel/exit.c:952 do_group_exit+0xd3/0x2a0 kernel/exit.c:1105 get_signal+0x2673/0x26d0 kernel/signal.c:3034 arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:111 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f305578e929 Code: Unable to access opcode bytes at 0x7f305578e8ff. RSP: 002b:00007f30565df0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007f30559b5fa8 RCX: 00007f305578e929 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f30559b5fac RBP: 00007f30559b5fa0 R08: 00007f30565e0000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000246 R12: 00007f30559b5fac R13: 0000000000000000 R14: 00007ffe3165b100 R15: 00007ffe3165b1e8