watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.4.27:6005] Modules linked in: irq event stamp: 16664657 hardirqs last enabled at (16664656): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (16664657): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (16519604): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (16519604): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (16519604): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (16519607): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (16519607): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (16519607): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6005 Comm: syz.4.27 Not tainted 6.15.0-syzkaller-gf66b4aaff254 #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 c2 e2 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:ffffc90000a08640 EFLAGS: 00000206 RAX: cd3b8327210c4800 RBX: 1ffff920001410d0 RCX: cd3b8327210c4800 RDX: 0000000000000000 RSI: ffffffff8d97cf77 RDI: ffffffff8be28800 RBP: ffffc90000a08730 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203f R12: ffffffff8e144400 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002 FS: 00007f7fceeae6c0(0000) GS:ffff888125d54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3071effc CR3: 00000000770d6000 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] is_bpf_text_address+0x292/0x2b0 kernel/bpf/core.c:774 kernel_text_address+0xa5/0xe0 kernel/extable.c:125 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 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:2381 [inline] slab_free_after_rcu_debug+0x129/0x2a0 mm/slub.c:4693 rcu_do_batch kernel/rcu/tree.c:2576 [inline] rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2832 handle_softirqs+0x286/0x870 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:schedule_debug kernel/sched/core.c:5970 [inline] RIP: 0010:__schedule+0x1b2/0x4d00 kernel/sched/core.c:6682 Code: 8b 1b 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 60 59 bd f6 48 81 3b 9d 6e ac 57 0f 85 26 18 00 00 83 7c 24 70 00 <7f> 42 49 8d 5e 18 48 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 RSP: 0018:ffffc9000c1a7580 EFLAGS: 00010202 RAX: 1ffff92001834000 RBX: ffffc9000c1a0000 RCX: cd3b8327210c4800 RDX: 0000000000000000 RSI: ffffffff8be287e0 RDI: ffffffff8be287a0 RBP: ffffc9000c1a7790 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203f R12: ffff8880b873c408 R13: dffffc0000000000 R14: ffff8880343ada00 R15: ffff888125d54000 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7108 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:preempt_schedule+0xa/0xc0 kernel/sched/core.c:6982 Code: cc cc cc 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 56 <53> 48 83 e4 e0 48 83 ec 60 65 48 8b 05 35 99 35 07 48 89 44 24 58 RSP: 0018:ffffc9000c1a7908 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888052ae07c8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 00000000ffffffff RBP: ffffc9000c1a7910 R08: ffff888052ae07cb R09: 1ffff1100a55c0f9 R10: dffffc0000000000 R11: ffffed100a55c0fa R12: dffffc0000000000 R13: ffffc9000c1a7aa0 R14: ffff888052ae07c0 R15: ffff8880343ada00 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_unlock+0x3f/0x50 kernel/locking/spinlock.c:186 spin_unlock include/linux/spinlock.h:391 [inline] futex_queue kernel/futex/futex.h:370 [inline] futex_wait_setup+0x43d/0x590 kernel/futex/waitwake.c:660 __futex_wait+0x148/0x3e0 kernel/futex/waitwake.c:682 futex_wait+0x104/0x360 kernel/futex/waitwake.c:715 do_futex+0x333/0x420 kernel/futex/syscalls.c:102 __do_sys_futex kernel/futex/syscalls.c:179 [inline] __se_sys_futex+0x36f/0x400 kernel/futex/syscalls.c:160 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7fcdf8e929 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:00007f7fceeae0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f7fce1b5fa8 RCX: 00007f7fcdf8e929 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f7fce1b5fa8 RBP: 00007f7fce1b5fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7fce1b5fac R13: 0000000000000000 R14: 00007ffd4d395e40 R15: 00007ffd4d395f28 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5974 Comm: syz.1.17 Not tainted 6.15.0-syzkaller-gf66b4aaff254 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:seqcount_lockdep_reader_access+0x2f/0x1c0 include/linux/seqlock.h:67 Code: 48 89 e5 41 57 41 56 41 54 53 48 83 e4 e0 48 81 ec 80 00 00 00 65 48 8b 05 ee 01 ee 10 48 89 44 24 68 48 c7 04 24 b3 8a b5 41 <48> c7 44 24 08 8d c7 b7 8d 48 c7 44 24 10 10 be ae 81 49 89 e6 49 RSP: 0018:ffffc90000006f00 EFLAGS: 00000086 RAX: 7aa37bca01e8b100 RBX: 0000000000000000 RCX: ffff8880321f0000 RDX: 0000000000010100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000006fb8 R08: ffffc90000006d37 R09: 0000000000000000 R10: ffffc90000006d20 R11: ffffffff81aebfe0 R12: ffff8880b8627ba0 R13: dffffc0000000000 R14: 0000000000000001 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125c54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f18730d3040 CR3: 0000000033aaa000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: ktime_get+0x3e/0x1f0 kernel/time/timekeeping.c:776 hrtimer_forward_now include/linux/hrtimer.h:366 [inline] perf_swevent_hrtimer+0x43f/0x550 kernel/events/core.c:11722 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x4dd/0xc60 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887 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:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] RIP: 0010:rcu_is_watching+0x2e/0xb0 kernel/rcu/tree.c:745 Code: 41 57 41 56 53 65 ff 05 e0 99 f5 10 e8 8b fb be 09 89 c3 83 f8 08 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 60 2c ba 8d <4c> 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 ec 09 7d 00 RSP: 0018:ffffc900000075d8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 7aa37bca01e8b100 RDX: 0000000000000000 RSI: ffffffff8be287e0 RDI: ffffffff8be287a0 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffffff81729de5 R10: ffffc90000007718 R11: ffffffff81acf670 R12: 1ffff92000000ed9 R13: ffffc90000007700 R14: ffffffff8dba2c60 R15: dffffc0000000000 rcu_read_lock include/linux/rcupdate.h:842 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xd4/0x2390 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:2381 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4745 skb_release_data+0x62d/0x7c0 net/core/skbuff.c:1087 skb_release_all net/core/skbuff.c:1152 [inline] __kfree_skb net/core/skbuff.c:1166 [inline] consume_skb+0x9e/0xf0 net/core/skbuff.c:1398 mac80211_hwsim_beacon_tx+0x3f0/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2323 __iterate_interfaces+0x2a8/0x590 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+0x529/0xc60 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842 handle_softirqs+0x286/0x870 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:ptlock_ptr include/linux/mm.h:2890 [inline] RIP: 0010:pte_lockptr include/linux/mm.h:2914 [inline] RIP: 0010:__pte_offset_map_lock+0x128/0x210 mm/pgtable-generic.c:401 Code: e8 2d 52 af ff 4d 21 f5 49 c1 ed 06 4b 8d 2c 2f 48 83 c5 28 48 89 e8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 80 3c 30 00 <74> 08 48 89 ef e8 3e 1c 13 00 48 8b 6d 00 48 89 ef e8 72 74 57 09 RSP: 0018:ffffc9000c027328 EFLAGS: 00000246 RAX: 1ffffd40003ffcc5 RBX: ffff88807ffcd740 RCX: ffff8880321f0000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffea0001ffe628 R08: 0000000000000000 R09: ffffffff82110cc9 R10: ffffc9000c0275a0 R11: fffff52001804eb6 R12: 1ffff1100fff9ae8 R13: 0000000001ffe600 R14: dffffc0000000000 R15: ffffea0000000000 pte_offset_map_lock include/linux/mm.h:3010 [inline] zap_pte_range mm/memory.c:1721 [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+0x3963/0x41c0 mm/memory.c:1898 unmap_single_vma mm/memory.c:1941 [inline] unmap_vmas+0x399/0x580 mm/memory.c:1985 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: 0033:0x7f675df8e929 Code: Unable to access opcode bytes at 0x7f675df8e8ff. RSP: 002b:00007f675ed7d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: fffffffffffffff2 RBX: 00007f675e1b5fa0 RCX: 00007f675df8e929 RDX: 0000000000000094 RSI: 0000200000000040 RDI: 0000000000000005 RBP: 00007f675e010b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f675e1b5fa0 R15: 00007fffe2a3d898