watchdog: BUG: soft lockup - CPU#0 stuck for 114s! [syz.5.583:8093] Modules linked in: irq event stamp: 15459737 hardirqs last enabled at (15459736): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:357 hardirqs last disabled at (15459737): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (15354500): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (15354500): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (15354500): [] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 softirqs last disabled at (15354505): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (15354505): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (15354505): [] __irq_exit_rcu+0xfb/0x220 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 8093 Comm: syz.5.583 Not tainted 6.14.0-syzkaller-g527b33dda1b5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:perf_trace_run_bpf_submit+0x0/0x180 kernel/events/core.c:10804 Code: 89 f1 80 e1 07 38 c1 0f 8c 6b ff ff ff 4c 89 f7 e8 65 78 37 00 e9 5e ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 18 4d 89 cd 4c RSP: 0018:ffffc900000070a8 EFLAGS: 00000246 RAX: 1ffff92000000e28 RBX: ffffffff8ec0d280 RCX: ffffffff8ec0d280 RDX: 0000000000000001 RSI: 000000000000002c RDI: ffffe8ffffa95000 RBP: ffffc900000071d0 R08: 0000000000000001 R09: ffff8880b8632608 R10: dffffc0000000000 R11: fffff91ffff52a05 R12: dffffc0000000000 R13: 0000000000000001 R14: 000000000000002c R15: ffffffff93689020 FS: 0000000000000000(0000) GS:ffff888124f97000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f962c04ea15 CR3: 0000000033ea8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x39c/0x4a0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b4/0x3e0 kernel/locking/lockdep.c:5877 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x1a9f/0x23b0 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11e/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2389 [inline] slab_free mm/slub.c:4646 [inline] kmem_cache_free+0x197/0x410 mm/slub.c:4748 skb_kfree_head net/core/skbuff.c:1056 [inline] skb_free_head net/core/skbuff.c:1070 [inline] skb_release_data+0x67a/0x8b0 net/core/skbuff.c:1097 skb_release_all net/core/skbuff.c:1162 [inline] napi_consume_skb+0x159/0x1e0 net/core/skbuff.c:1490 __free_old_xmit+0x2f5/0x6f0 drivers/net/virtio_net.c:-1 virtnet_free_old_xmit drivers/net/virtio_net.c:610 [inline] free_old_xmit drivers/net/virtio_net.c:1045 [inline] virtnet_poll_tx+0x515/0x1460 drivers/net/virtio_net.c:3196 __napi_poll+0xcb/0x480 net/core/dev.c:7328 napi_poll net/core/dev.c:7392 [inline] net_rx_action+0x89d/0x1240 net/core/dev.c:7514 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xfb/0x220 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:rcu_read_unlock_special+0x8a/0x570 kernel/rcu/tree_plugin.h:694 Code: f1 f1 f1 00 f2 f2 f2 49 89 04 14 66 41 c7 44 14 09 f3 f3 41 c6 44 14 0b f3 65 44 8b 3d 3f 0c bf 11 41 f7 c7 00 00 f0 00 74 44 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 22 00 00 00 00 66 42 c7 44 22 RSP: 0018:ffffc9000ab86f80 EFLAGS: 00000206 RAX: 9b35ba5a7205c800 RBX: 1ffff92001570df8 RCX: ffffffff93689020 RDX: dffffc0000000000 RSI: ffffffff8e69b310 RDI: ffffffff8ca1b0e0 RBP: ffffc9000ab87060 R08: ffffffff905fcf77 R09: 1ffffffff20bf9ee R10: dffffc0000000000 R11: fffffbfff20bf9ef R12: 1ffff92001570df4 R13: ffff888026c74060 R14: ffffc9000ab86fc0 R15: ffffffff8ed42d00 __rcu_read_unlock+0xa1/0x110 kernel/rcu/tree_plugin.h:438 rcu_read_unlock include/linux/rcupdate.h:873 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x1aa4/0x23b0 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11e/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbf/0xd0 mm/kasan/generic.c:548 __call_rcu_common kernel/rcu/tree.c:3082 [inline] call_rcu+0x172/0xad0 kernel/rcu/tree.c:3202 __dentry_kill+0x497/0x630 fs/dcache.c:679 shrink_kill+0xa9/0x2c0 fs/dcache.c:1105 shrink_dentry_list+0x2c0/0x5b0 fs/dcache.c:1132 shrink_dcache_parent+0xcd/0x3c0 fs/dcache.c:-1 do_one_tree+0x23/0xe0 fs/dcache.c:1595 shrink_dcache_for_umount+0xb4/0x180 fs/dcache.c:1612 generic_shutdown_super+0x6a/0x2d0 fs/super.c:620 kill_anon_super+0x3b/0x70 fs/super.c:1237 proc_kill_sb+0x8d/0xd0 fs/proc/root.c:272 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435 task_work_run+0x251/0x310 kernel/task_work.c:227 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0xa11/0x27f0 kernel/exit.c:953 do_group_exit+0x207/0x2c0 kernel/exit.c:1102 get_signal+0x1696/0x1730 kernel/signal.c:3034 arch_do_signal_or_restart+0x98/0x840 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [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+0xce/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd5ac78d169 Code: Unable to access opcode bytes at 0x7fd5ac78d13f. RSP: 002b:00007fd5ad643038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: fffffffffffffff2 RBX: 00007fd5ac9a5fa0 RCX: 00007fd5ac78d169 RDX: 0000000000000090 RSI: 0000200000000140 RDI: 0000000000000005 RBP: 00007fd5ac80e730 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd5ac9a5fa0 R15: 00007ffdedd6e968 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 8276 Comm: syz.6.629 Not tainted 6.14.0-syzkaller-g527b33dda1b5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:perf_prepare_sample+0x1c5a/0x2190 kernel/events/core.c:8291 Code: 80 3c 38 00 48 8b 7c 24 48 74 05 e8 d0 43 38 00 4d 01 74 24 10 42 80 3c 3b 00 74 08 4c 89 e7 e8 bc 43 38 00 41 80 4c 24 02 10 <48> c7 44 24 60 0e 36 e0 45 48 8b 44 24 58 49 c7 04 07 00 00 00 00 RSP: 0018:ffffc90000a07100 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88803051bc00 RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a071f0 R08: ffffffff81f52204 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90000a07518 R13: 1ffff1100fa3e714 R14: ffff88807d1f38a0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125097000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7bea4bc218 CR3: 000000006d5f0000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __perf_event_output kernel/events/core.c:8372 [inline] perf_event_output_forward+0x18d/0x540 kernel/events/core.c:8393 __perf_event_overflow+0x858/0xdd0 kernel/events/core.c:10268 perf_swevent_hrtimer+0x3b6/0x560 kernel/events/core.c:11632 __run_hrtimer kernel/time/hrtimer.c:1791 [inline] __hrtimer_run_queues+0x55c/0xd40 kernel/time/hrtimer.c:1855 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1917 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x110/0x420 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:put_recursion_context kernel/events/internal.h:229 [inline] RIP: 0010:perf_swevent_put_recursion_context kernel/events/core.c:10499 [inline] RIP: 0010:perf_tp_event+0x157c/0x1660 kernel/events/core.c:10911 Code: 00 48 c7 c2 20 c2 53 8c e8 31 fe a8 ff 48 c7 c7 e0 df d3 8e 4c 89 fe e8 72 e0 a8 ff e8 3d 63 b3 ff 65 48 8b 04 25 08 90 68 93 <41> 0f b6 ce 48 8d 1c 08 48 81 c3 2c 14 00 00 48 89 d8 48 c1 e8 03 RSP: 0018:ffffc90000a07a40 EFLAGS: 00000246 RAX: ffff88803051bc00 RBX: 0000000000000000 RCX: ffff88803051bc00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a07d00 R08: ffffffff81f620db R09: 0000000000000000 R10: ffffc90000a07b08 R11: fffff52000140f63 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90000a07b00 perf_trace_run_bpf_submit+0x100/0x180 kernel/events/core.c:10812 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x402/0x520 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2c6/0x2f0 kernel/locking/lockdep.c:5829 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+0xd5/0x23b0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11e/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x11a/0x1d0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4151 [inline] slab_alloc_node mm/slub.c:4200 [inline] kmem_cache_alloc_node_noprof+0x1f2/0x3b0 mm/slub.c:4252 kmalloc_reserve+0xa8/0x2a0 net/core/skbuff.c:577 __alloc_skb+0x1f2/0x480 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1340 [inline] nlmsg_new include/net/netlink.h:1019 [inline] __neigh_notify+0x157/0x300 net/core/neighbour.c:3450 neigh_cleanup_and_release+0xb7/0x2a0 net/core/neighbour.c:119 neigh_remove_one+0x462/0x4c0 net/core/neighbour.c:239 neigh_forced_gc net/core/neighbour.c:270 [inline] neigh_alloc net/core/neighbour.c:464 [inline] ___neigh_create+0x39d/0x2360 net/core/neighbour.c:607 ip6_finish_output2+0xb31/0x1750 net/ipv6/ip6_output.c:132 __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline] ip6_finish_output+0x421/0x840 net/ipv6/ip6_output.c:226 NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xb58/0x1560 net/ipv6/ndisc.c:513 addrconf_rs_timer+0x380/0x680 net/ipv6/addrconf.c:4033 call_timer_fn+0x189/0x650 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x66e/0x8e0 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445 handle_softirqs+0x2d6/0x9b0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xfb/0x220 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:folio_test_anon include/linux/page-flags.h:725 [inline] RIP: 0010:PageAnon include/linux/page-flags.h:737 [inline] RIP: 0010:page_table_check_clear+0x150/0x6f0 mm/page_table_check.c:75 Code: eb 48 83 c3 18 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 86 2d f4 ff 48 8b 33 83 e6 01 <31> ff 48 89 74 24 18 e8 e4 08 8a ff e8 0f 2e 70 ff 48 8d 2d 00 00 RSP: 0018:ffffc90003aff1c8 EFLAGS: 00000246 RAX: 1ffffd40003bf493 RBX: ffffea0001dfa498 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff82395329 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1100bf8d0b2 R13: ffffea0001dfa480 R14: 0000000000000001 R15: 0000000000000000 ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline] get_and_clear_full_ptes include/linux/pgtable.h:714 [inline] zap_present_folio_ptes mm/memory.c:1501 [inline] zap_present_ptes mm/memory.c:1586 [inline] do_zap_pte_range mm/memory.c:1687 [inline] zap_pte_range mm/memory.c:1731 [inline] zap_pmd_range mm/memory.c:1823 [inline] zap_pud_range mm/memory.c:1852 [inline] zap_p4d_range mm/memory.c:1873 [inline] unmap_page_range+0x33cf/0x44d0 mm/memory.c:1894 unmap_vmas+0x3ce/0x5f0 mm/memory.c:1984 exit_mmap+0x2bc/0xde0 mm/mmap.c:1284 __mmput+0x115/0x420 kernel/fork.c:1379 exit_mm+0x221/0x310 kernel/exit.c:589 do_exit+0x994/0x27f0 kernel/exit.c:940 do_group_exit+0x207/0x2c0 kernel/exit.c:1102 get_signal+0x1696/0x1730 kernel/signal.c:3034 arch_do_signal_or_restart+0x98/0x840 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [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+0xce/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcc94d8d169 Code: Unable to access opcode bytes at 0x7fcc94d8d13f. RSP: 002b:00007fcc95c69038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: 0000000000000009 RBX: 00007fcc94fa5fa0 RCX: 00007fcc94d8d169 RDX: 00000000000c0000 RSI: 0000200000000080 RDI: ffffffffffffff9c RBP: 00007fcc94e0e730 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fcc94fa5fa0 R15: 00007ffd4246ef28