RBP: 00007ffea2d5a28c R08: 00000004a2d5a31f R09: 00000000000927c0 R10: 0000000000000001 R11: 0000000000000246 R12: 00000000000001c8 R13: 00000000000927c0 R14: 0000000000069aa2 R15: 00007ffea2d5a2e0 watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [syz.3.2628:13363] Modules linked in: irq event stamp: 1206376 hardirqs last enabled at (1206375): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:214 hardirqs last disabled at (1206376): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (1206374): [] softirq_handle_end kernel/softirq.c:468 [inline] softirqs last enabled at (1206374): [] handle_softirqs+0x5be/0x8e0 kernel/softirq.c:650 softirqs last disabled at (1206255): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (1206255): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (1206255): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 13363 Comm: syz.3.2628 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xdfd/0x1600 kernel/smp.c:877 Code: 57 48 8b 54 24 10 4c 89 74 24 10 49 89 d5 48 89 d5 48 89 54 24 18 49 c1 ed 03 83 e5 07 4d 01 e5 83 c5 03 e8 a5 0d 0c 00 f3 90 <41> 0f b6 45 00 40 38 c5 7c 08 84 c0 0f 85 e0 05 00 00 8b 43 08 31 RSP: 0018:ffffc900038ef920 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880b8442680 RCX: ffffffff81b0ec81 RDX: ffff8880299d8000 RSI: ffffffff81b0ec5b RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000 R13: ffffed10170884d1 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888124b0c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555843cd808 CR3: 00000000684bd000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1043 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1381 [inline] flush_tlb_mm_range+0x4a0/0x17a0 arch/x86/mm/tlb.c:1471 tlb_flush arch/x86/include/asm/tlb.h:23 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:490 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:480 [inline] tlb_flush_mmu mm/mmu_gather.c:403 [inline] tlb_finish_mmu+0x3c9/0x7c0 mm/mmu_gather.c:497 exit_mmap+0x3fc/0xb90 mm/mmap.c:1293 __mmput+0x12a/0x410 kernel/fork.c:1133 mmput+0x62/0x70 kernel/fork.c:1156 exit_mm kernel/exit.c:582 [inline] do_exit+0x7c7/0x2bf0 kernel/exit.c:954 do_group_exit+0xd3/0x2a0 kernel/exit.c:1107 __do_sys_exit_group kernel/exit.c:1118 [inline] __se_sys_exit_group kernel/exit.c:1116 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1116 x64_sys_call+0x150b/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f657598efc9 Code: Unable to access opcode bytes at 0x7f657598ef9f. RSP: 002b:00007ffea2d5a228 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f657598efc9 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffea2d5a28c R08: 00000004a2d5a31f R09: 00000000000927c0 R10: 0000000000000001 R11: 0000000000000246 R12: 00000000000001c8 R13: 00000000000927c0 R14: 0000000000069aa2 R15: 00007ffea2d5a2e0 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 13371 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:enqueue_hrtimer+0x14a/0x3b0 kernel/time/hrtimer.c:1084 Code: 03 0f 8e 34 02 00 00 44 8b 6b 08 bf 1f 00 00 00 44 89 ee e8 d8 98 13 00 41 83 fd 1f 0f 87 b6 15 77 ff e8 89 9d 13 00 44 89 e9 <49> 8d 7c 24 44 b8 01 00 00 00 d3 e0 48 89 fa 41 89 c5 48 c1 ea 03 RSP: 0018:ffffc90000007e18 EFLAGS: 00000046 RAX: 0000000080010002 RBX: ffff8880b8427e80 RCX: 0000000000000003 RDX: ffff88802acc9e40 RSI: ffffffff81a95c77 RDI: 0000000000000005 RBP: ffff8880346d4340 R08: 0000000000000005 R09: 000000000000001f R10: 0000000000000003 R11: ffffffff9aca5b80 R12: ffff8880b8427c80 R13: 0000000000000003 R14: ffff8880346d4340 R15: 0000000000000001 FS: 00005555843cd500(0000) GS:ffff888124a0c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc08ec6605a CR3: 000000002237c000 CR4: 0000000000350ef0 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1794 [inline] __hrtimer_run_queues+0x8ff/0xad0 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x10b/0x3f0 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] RIP: 0010:rcu_is_watching+0x19/0xc0 kernel/rcu/tree.c:751 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 53 65 ff 05 73 78 ff 11 e8 5e a3 bc 09 48 c7 c3 a8 72 a2 93 <89> c5 83 f8 07 0f 87 82 00 00 00 48 8d 3c ed e0 0e cd 8d 48 b8 00 RSP: 0018:ffffc9000ae07918 EFLAGS: 00000282 RAX: 0000000000000000 RBX: ffffffff93a272a8 RCX: ffffffff911adc01 RDX: 0000000000000000 RSI: ffffffff8bf07240 RDI: ffffffff8bf07280 RBP: 0000000000000001 R08: ffffffff911adc8a R09: 0000000000000000 R10: 0000000000000000 R11: 000000000000a7f5 R12: ffffffff816c0914 R13: ffffc9000ae079e8 R14: ffffc9000ae07b18 R15: ffffc9000ae07a1c trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x201/0x2f0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:897 [inline] class_rcu_destructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0x3f9/0x20a0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 kasan_save_stack+0x33/0x60 mm/kasan/common.c:56 kasan_save_track+0x14/0x30 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4962 [inline] slab_alloc_node mm/slub.c:5272 [inline] kmem_cache_alloc_noprof+0x250/0x6e0 mm/slub.c:5279 getname_flags.part.0+0x4c/0x550 fs/namei.c:146 getname_flags+0x93/0xf0 include/linux/audit.h:345 user_path_at+0x24/0x60 fs/namei.c:3214 __do_sys_chdir fs/open.c:561 [inline] __se_sys_chdir fs/open.c:555 [inline] __x64_sys_chdir+0xbe/0x270 fs/open.c:555 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc08ed8dd17 Code: ff ff 77 07 c3 66 0f 1f 44 00 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 50 00 00 00 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:00007fff1b5b98b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc08ed8dd17 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007fff1b5b9910 RBP: 00007fff1b5b98fc R08: 0000000000000000 R09: 00007fc08fb1d6c0 R10: 00005555843cd500 R11: 0000000000000246 R12: 0000000000000182 R13: 00000000000927c0 R14: 0000000000069a53 R15: 00007fff1b5b9950