watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.4.45:6048] Modules linked in: irq event stamp: 11007351 hardirqs last enabled at (11007350): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11007351): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (11001758): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (11001758): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (11001758): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (11001761): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (11001761): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (11001761): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6048 Comm: syz.4.45 Not tainted 6.15.0-rc4-syzkaller-gf263336a41da #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:lock_is_held_type+0x137/0x190 kernel/locking/lockdep.c:5943 Code: 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 89 64 1f 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffffc90000007aa8 EFLAGS: 00000206 RAX: 281c26771caf1100 RBX: 0000000000000001 RCX: 281c26771caf1100 RDX: ffff88802d853c00 RSI: ffffffff8d93515c RDI: ffffffff8bc1cde0 RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff894509c9 R12: 0000000000000246 R13: ffff88802d853c00 R14: ffffffff8df3b860 R15: 0000000000000001 FS: 00007fd467df66c0(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f40b6e92d58 CR3: 0000000033a3e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: read_pnet_rcu include/net/net_namespace.h:418 [inline] dev_net_rcu include/linux/netdevice.h:2714 [inline] __neigh_notify+0x127/0x310 net/core/neighbour.c:3449 neigh_update_notify net/core/neighbour.c:2618 [inline] neigh_timer_handler+0xb03/0x1030 net/core/neighbour.c:1113 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7090 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 eb c3 39 f6 e8 86 43 70 f6 fb bf 01 00 00 00 4b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc900055e7a40 EFLAGS: 00000286 RAX: 281c26771caf1100 RBX: 0000000000000000 RCX: 281c26771caf1100 RDX: 0000000000000000 RSI: ffffffff8d749ffa RDI: 0000000000000001 RBP: ffffc900055e7ae0 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000abcf48 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:xa_empty include/linux/xarray.h:411 [inline] RIP: 0010:mapping_empty include/linux/pagemap.h:145 [inline] RIP: 0010:truncate_inode_pages_final+0x28/0x90 mm/truncate.c:480 Code: 90 90 f3 0f 1e fa 41 56 53 48 89 fb e8 11 78 c4 ff 48 8d bb 28 01 00 00 be 08 00 00 00 e8 30 6c 26 00 f0 80 8b 28 01 00 00 10 <4c> 8d 73 50 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 RSP: 0018:ffffc900055e7ba8 EFLAGS: 00000202 RAX: ffffffff81fb4601 RBX: ffff88807bfa38e0 RCX: ffffffff81fb46d0 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88807bfa3a08 RBP: ffffc900055e7cf8 R08: ffff88807bfa3a0f R09: 1ffff1100f7f4741 R10: dffffc0000000000 R11: ffffed100f7f4742 R12: dffffc0000000000 R13: ffff88807bfa36c0 R14: ffff88807bfa3740 R15: 0000000000000000 evict+0x517/0x9c0 fs/inode.c:812 __dentry_kill+0x209/0x660 fs/dcache.c:660 dput+0x19f/0x2b0 fs/dcache.c:902 __fput+0x68e/0xa70 fs/file_table.c:473 task_work_run+0x1d1/0x260 kernel/task_work.c:227 resume_user_mode_work+0x5e/0x80 include/linux/resume_user_mode.h:50 exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x9a/0x120 kernel/entry/common.c:218 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd469f8e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd467df6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: 000000000000fe33 RBX: 00007fd46a1b5fa0 RCX: 00007fd469f8e969 RDX: 000000000000fe33 RSI: 0000200000000080 RDI: 0000000000000007 RBP: 00007fd46a010ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd46a1b5fa0 R15: 00007fff22c51698 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6056 Comm: syz.3.47 Not tainted 6.15.0-rc4-syzkaller-gf263336a41da #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:hrtimer_get_softexpires_tv64 include/linux/hrtimer.h:149 [inline] RIP: 0010:__hrtimer_run_queues+0x229/0xc60 kernel/time/hrtimer.c:1822 Code: 4c 24 20 48 c1 e9 03 48 89 4c 24 30 4c 89 7c 24 60 48 8b 9c 24 e0 00 00 00 4d 8d 74 24 20 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 f7 e8 3d 8d 73 00 4d 8b 36 48 89 df 4c 89 f6 e8 ff 9d RSP: 0018:ffffc90000a08060 EFLAGS: 00000046 RAX: 1ffff1100fae9031 RBX: 00000033ef9af4ad RCX: 1ffff11017124eea RDX: ffff8880b8927748 RSI: 0000000000000000 RDI: ffff8880b89277a8 RBP: ffffc90000a081a8 R08: ffffc90000a07e4f R09: 0000000000000000 R10: ffffc90000a07e40 R11: ffffffff8166cd10 R12: ffff88807d748168 R13: dffffc0000000000 R14: ffff88807d748188 R15: ffff8880b8927740 FS: 00007f40b6ed46c0(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f077748bbd0 CR3: 0000000049578000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5870 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 eb 32 d7 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90000a083d8 EFLAGS: 00000206 RAX: e280355c31528800 RBX: 0000000000000000 RCX: e280355c31528800 RDX: 0000000000000000 RSI: ffffffff8d93515c RDI: ffffffff8bc1cde0 RBP: ffffffff817199f5 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff817199f5 R12: 0000000000000002 R13: ffffffff8df3b860 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2398 [inline] slab_free mm/slub.c:4656 [inline] kmem_cache_free+0x192/0x3f0 mm/slub.c:4758 skb_kfree_head net/core/skbuff.c:1056 [inline] skb_free_head net/core/skbuff.c:1070 [inline] skb_release_data+0x670/0x890 net/core/skbuff.c:1097 skb_release_all net/core/skbuff.c:1162 [inline] __kfree_skb+0x55/0x70 net/core/skbuff.c:1176 tcp_write_queue_purge+0x143/0x2f0 net/ipv4/tcp.c:3288 tcp_done_with_error+0x43/0xd0 net/ipv4/tcp_input.c:4545 tcp_write_err net/ipv4/tcp_timer.c:77 [inline] tcp_write_timeout net/ipv4/tcp_timer.c:294 [inline] tcp_retransmit_timer+0x1456/0x3200 net/ipv4/tcp_timer.c:600 tcp_write_timer+0x162/0x2e0 net/ipv4/tcp_timer.c:738 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:kasan_check_range+0x1be/0x2b0 mm/kasan/generic.c:-1 Code: 01 f3 49 8d 5c 24 07 4d 85 e4 49 0f 49 dc 48 83 e3 f8 49 29 dc 74 12 41 80 3b 00 0f 85 b8 00 00 00 49 ff c3 49 ff cc 75 ee 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 45 84 ff 75 63 41 f7 RSP: 0018:ffffc900057671d0 EFLAGS: 00000256 RAX: e280355c31528801 RBX: 0000000000000028 RCX: ffffffff84be52af RDX: 0000000000000001 RSI: 0000000000000028 RDI: ffffc90005767278 RBP: 0000000000000000 R08: ffffc9000576729f R09: 1ffff92000aece53 R10: dffffc0000000000 R11: fffff52000aece54 R12: 0000000000000005 R13: 0000000000000100 R14: fffff52000aece54 R15: 1ffff92000aece4f __asan_memset+0x22/0x50 mm/kasan/shadow.c:84 __debug_check_no_obj_freed lib/debugobjects.c:1073 [inline] debug_check_no_obj_freed+0x4f/0x470 lib/debugobjects.c:1129 slab_free_hook mm/slub.c:2329 [inline] slab_free mm/slub.c:4656 [inline] kfree+0x117/0x440 mm/slub.c:4855 free_func_state kernel/bpf/verifier.c:1657 [inline] free_verifier_state kernel/bpf/verifier.c:1667 [inline] free_states kernel/bpf/verifier.c:22637 [inline] do_check_common+0x182f/0x20b0 kernel/bpf/verifier.c:22788 do_check_main kernel/bpf/verifier.c:22867 [inline] bpf_check+0x13679/0x19a70 kernel/bpf/verifier.c:24033 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2972 __sys_bpf+0x5f1/0x860 kernel/bpf/syscall.c:5835 __do_sys_bpf kernel/bpf/syscall.c:5942 [inline] __se_sys_bpf kernel/bpf/syscall.c:5940 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5940 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f40b5f8e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f40b6ed4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f40b61b5fa0 RCX: 00007f40b5f8e969 RDX: 0000000000000090 RSI: 0000200000000840 RDI: 0000000000000005 RBP: 00007f40b6010ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f40b61b5fa0 R15: 00007ffd1f8c1aa8