watchdog: BUG: soft lockup - CPU#1 stuck for 128s! [syz.9.43:6291] Modules linked in: irq event stamp: 19213487 hardirqs last enabled at (19213486): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (19213487): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (13313692): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (13313692): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (13313692): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (13313695): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (13313695): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (13313695): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6291 Comm: syz.9.43 Not tainted 6.15.0-syzkaller-gbb1556ec9464 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:rcu_read_unlock_special+0x87/0x4c0 kernel/rcu/tree_plugin.h:694 Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 72 54 f4 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0018:ffffc90000a08420 EFLAGS: 00000206 RAX: 77d6a9b3412a0700 RBX: 1ffff9200014108c RCX: 77d6a9b3412a0700 RDX: 0000000000000002 RSI: ffffffff8d9705ba RDI: ffffffff8be26f40 RBP: ffffc90000a08518 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: ffffffff8e142400 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002 FS: 00007fa58883b6c0(0000) GS:ffff888125d5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31d1aff8 CR3: 000000007ac5a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __rcu_read_unlock+0x84/0xe0 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+0x19ae/0x2390 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf5/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706 __folio_put+0x21b/0x2c0 mm/swap.c:112 put_netmem net/core/skbuff.c:7375 [inline] skb_page_unref include/linux/skbuff_ref.h:43 [inline] __skb_frag_unref include/linux/skbuff_ref.h:56 [inline] skb_release_data+0x49a/0x7c0 net/core/skbuff.c:1081 skb_release_all net/core/skbuff.c:1152 [inline] __kfree_skb+0x55/0x70 net/core/skbuff.c:1166 tcp_write_queue_purge+0x143/0x2f0 net/ipv4/tcp.c:3318 tcp_done_with_error+0x43/0xd0 net/ipv4/tcp_input.c:4540 tcp_write_err net/ipv4/tcp_timer.c:77 [inline] tcp_probe_timer net/ipv4/tcp_timer.c:431 [inline] tcp_write_timer_handler+0x6ec/0x9b0 net/ipv4/tcp_timer.c:721 tcp_write_timer+0x162/0x2e0 net/ipv4/tcp_timer.c:738 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 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:7104 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 8b 0a 2b f6 e8 d6 1b 62 f6 fb bf 01 00 00 00 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc900034f78e0 EFLAGS: 00000282 RAX: 77d6a9b3412a0700 RBX: ffff88802c2d5a00 RCX: 77d6a9b3412a0700 RDX: 0000000000000000 RSI: ffffffff8d9705ba RDI: 0000000000000001 RBP: ffffc900034f7980 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200069ef1c irqentry_exit+0x6f/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:acct_update_integrals+0x351/0x3a0 kernel/tsacct.c:161 Code: 5b fe ff eb 1c e8 3f 5b fe ff eb a0 e8 38 5b fe ff e8 63 a9 a2 09 4d 85 f6 74 e3 e8 29 5b fe ff fb 48 c7 44 24 20 0e 36 e0 45 <4b> c7 04 2c 00 00 00 00 4b c7 44 2c 09 00 00 00 00 66 43 c7 44 2c RSP: 0018:ffffc900034f7a40 EFLAGS: 00000293 RAX: ffffffff81c1dfb7 RBX: 0000000000000000 RCX: ffff88802c2d5a00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900034f7b50 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: 1ffff9200069ef4c R13: dffffc0000000000 R14: 0000000000000200 R15: 0000000000712446 do_exit+0x362/0x22e0 kernel/exit.c:916 do_group_exit+0x21c/0x2d0 kernel/exit.c:1104 get_signal+0x1286/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 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:330 [inline] irqentry_exit_to_user_mode+0x81/0x120 kernel/entry/common.c:184 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7fa58798e971 Code: 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 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:00007fa58883b038 EFLAGS: 00000207 RAX: 0000000000000006 RBX: 00007fa587bb5fa0 RCX: 00007fa58798e969 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000001200 RBP: 00007fa587a10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa587bb5fa0 R15: 00007ffe13bb74c8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6289 Comm: syz.6.44 Not tainted 6.15.0-syzkaller-gbb1556ec9464 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline] RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:139 [inline] RIP: 0010:wrmsrq arch/x86/include/asm/msr.h:199 [inline] RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:212 Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 e9 c0 37 f6 09 cc f3 0f 1e fa 89 f6 31 d2 e9 72 94 85 03 66 RSP: 0018:ffffc90000006c98 EFLAGS: 00000046 RAX: 000000000000008e RBX: ffff8880b8623900 RCX: 0000000000000838 RDX: 0000000000000000 RSI: 000000000000008e RDI: 0000000000000838 RBP: 0000000000000000 R08: ffffc90000006817 R09: 0000000000000000 R10: ffffc90000006808 R11: ffffffff816ff790 R12: 0000000010000000 R13: dffffc0000000000 R14: 000000000000008e R15: 0000000000000020 FS: 0000000000000000(0000) GS:ffff888125c5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0e33a00218 CR3: 000000007882a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: apic_write arch/x86/include/asm/apic.h:405 [inline] lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:416 clockevents_program_event+0x1cc/0x360 kernel/time/clockevents.c:334 hrtimer_interrupt+0x620/0xaa0 kernel/time/hrtimer.c:1900 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:perf_sample_save_raw_data include/linux/perf_event.h:1354 [inline] RIP: 0010:perf_tp_event+0x276/0x1380 kernel/events/core.c:10946 Code: 00 00 e8 5d fe cf ff 48 c7 84 24 80 00 00 00 00 01 00 00 49 8d 9c 24 f0 00 00 00 ba 10 00 00 00 4c 89 ef 31 f6 e8 ca 8a 33 00 <48> 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 e4 87 33 00 RSP: 0018:ffffc90000006f00 EFLAGS: 00000246 RAX: ffffc90000006f88 RBX: ffff888062f1a030 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000006f98 RBP: ffffc90000007188 R08: ffffc90000006f97 R09: 0000000000000000 R10: ffffc90000006f88 R11: fffff52000000df3 R12: ffff888062f19f40 R13: ffffc90000006f88 R14: ffff8880b8632a90 R15: dffffc0000000000 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:10871 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 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+0x3b2/0x3e0 kernel/locking/lockdep.c:5882 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+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 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 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4147 [inline] slab_alloc_node mm/slub.c:4196 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4248 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:579 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:670 skb_copy+0x188/0x800 net/core/skbuff.c:2125 mac80211_hwsim_tx_frame_no_nl+0xcd3/0x11c0 drivers/net/wireless/virtual/mac80211_hwsim.c:1871 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2222 mac80211_hwsim_beacon_tx+0x3f0/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2323 __iterate_interfaces+0x2ab/0x590 net/mac80211/util.c:761 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:797 mac80211_hwsim_beacon+0xbb/0x1c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2353 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x52c/0xc60 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842 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:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:trace_event_get_offsets_lock include/trace/events/lock.h:50 [inline] RIP: 0010:do_perf_trace_lock include/trace/events/lock.h:50 [inline] RIP: 0010:perf_trace_lock+0x9d/0x3b0 include/trace/events/lock.h:50 Code: f3 48 c7 44 24 60 00 00 00 00 c7 84 24 80 00 00 00 00 00 00 00 48 89 74 24 30 48 8d 5e 18 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 c9 5d 86 00 48 8b 03 48 85 c0 48 c7 c7 20 e3 8a RSP: 0018:ffffc90004fe71a0 EFLAGS: 00000246 RAX: 1ffffffff1c27a2b RBX: ffffffff8e13d158 RCX: ffff888025bb3c00 RDX: ffffffff822eedea RSI: ffffffff8e13d140 RDI: ffffffff8e00c120 RBP: ffffc90004fe72a0 R08: 0000000000000000 R09: ffffffff822eedea R10: dffffc0000000000 R11: fffff9400022f6e9 R12: 1ffff920009fce3c R13: ffffffff822eedea R14: ffffffff8e00c120 R15: dffffc0000000000 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5882 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock_sched include/linux/rcupdate.h:953 [inline] pfn_valid+0x3b2/0x490 include/linux/mmzone.h:2152 page_table_check_clear+0x21/0x700 mm/page_table_check.c:70 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:1503 [inline] zap_present_ptes mm/memory.c:1588 [inline] do_zap_pte_range mm/memory.c:1689 [inline] zap_pte_range mm/memory.c:1733 [inline] zap_pmd_range mm/memory.c:1825 [inline] zap_pud_range mm/memory.c:1854 [inline] zap_p4d_range mm/memory.c:1875 [inline] unmap_page_range+0x32fa/0x4580 mm/memory.c:1896 unmap_single_vma mm/memory.c:1939 [inline] unmap_vmas+0x399/0x580 mm/memory.c:1983 exit_mmap+0x248/0xb50 mm/mmap.c:1284 __mmput+0x118/0x420 kernel/fork.c:1121 exit_mm+0x1da/0x2c0 kernel/exit.c:581 do_exit+0x640/0x22e0 kernel/exit.c:943 do_group_exit+0x21c/0x2d0 kernel/exit.c:1104 get_signal+0x1286/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x75/0x110 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+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2d2ed8e969 Code: Unable to access opcode bytes at 0x7f2d2ed8e93f. RSP: 002b:00007f2d2fbdd038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffff91 RBX: 00007f2d2efb5fa0 RCX: 00007f2d2ed8e969 RDX: 0000000000000000 RSI: 0000200000004c40 RDI: 0000000000000007 RBP: 00007f2d2ee10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2d2efb5fa0 R15: 00007ffe264f6cb8