watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.3.279:7137] Modules linked in: irq event stamp: 13948573 hardirqs last enabled at (13948572): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:200 hardirqs last disabled at (13948573): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (76476): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (76476): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (76476): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (76479): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (76479): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (76479): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 7137 Comm: syz.3.279 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:stack_trace_consume_entry+0x0/0x280 kernel/stacktrace.c:83 Code: 75 0e 48 8d 65 f0 5b 41 5e 5d e9 cb f2 cf 09 cc e8 d5 0d cd 09 0f 1f 44 00 00 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 48 ba 00 00 RSP: 0018:ffffc90000006c60 EFLAGS: 00000282 RAX: ffffffff8223195d RBX: ffffc90000006d20 RCX: 6fd20f13eba21b00 RDX: 0000000000000001 RSI: ffffffff8223195d RDI: ffffc90000006d20 RBP: ffffc90000006cf0 R08: ffffc90000006fc8 R09: 0000000000000000 R10: ffffc90000006cb8 R11: ffffffff81ac3930 R12: ffff8880304a1e00 R13: ffffc90000007280 R14: ffffffff81ac3930 R15: ffffc90000006c68 FS: 00007f4e8f81c6c0(0000) GS:ffff888125c1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000180 CR3: 000000002f968000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x10d/0x150 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548 kvfree_call_rcu+0xbb/0x410 mm/slab_common.c:1962 cfg80211_update_known_bss+0x634/0x1330 net/wireless/scan.c:1936 __cfg80211_bss_update+0x147/0x2120 net/wireless/scan.c:1983 cfg80211_inform_single_bss_data+0xba9/0x1ac0 net/wireless/scan.c:2375 cfg80211_inform_bss_data+0x1fb/0x3b30 net/wireless/scan.c:3234 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3325 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:355 __ieee80211_rx_handle_packet net/mac80211/rx.c:5186 [inline] ieee80211_rx_list+0x201c/0x2a90 net/mac80211/rx.c:5423 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5446 ieee80211_rx include/net/mac80211.h:5210 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453 tasklet_action_common+0x369/0x580 kernel/softirq.c:829 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:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x9f/0x2c0 mm/kasan/generic.c:189 Code: 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 <0f> 85 de 01 00 00 49 ff c3 48 ff c3 75 ee e9 21 01 00 00 44 89 dd RSP: 0018:ffffc9000e04fa88 EFLAGS: 00000246 RAX: f2f200f2f2f2f201 RBX: fffffffffffffffe RCX: ffffffff8b7a1ec9 RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc9000e04fc70 RBP: 0000000000000000 R08: ffffc9000e04fc7f R09: 1ffff92001c09f8f R10: dffffc0000000000 R11: fffff52001c09f8e R12: 0000000000000002 R13: 0000000000000001 R14: fffff52001c09f90 R15: 1ffff92001c09f8e __asan_memset+0x22/0x50 mm/kasan/shadow.c:84 __schedule+0xb9/0x4cc0 kernel/sched/core.c:6827 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288 irqentry_exit+0x6f/0x90 kernel/entry/common.c:197 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:task_work_run+0xa5/0x260 kernel/task_work.c:225 Code: 78 09 00 00 49 8d 4e 2c 49 81 c6 10 0a 00 00 4c 89 f8 48 c1 e8 03 48 89 44 24 18 48 89 0c 24 48 c1 e9 03 48 89 4c 24 10 eb 05 c6 30 33 00 48 8b 44 24 18 42 80 3c 20 00 74 08 4c 89 ff e8 f2 RSP: 0018:ffffc9000e04fe60 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 6fd20f13eba21b00 RDX: ffff8880304a1e00 RSI: ffffffff8dba5d03 RDI: ffffffff8be33300 RBP: ffffc9000e04ff10 R08: 0000000000000000 R09: ffffffff8191c89f R10: dffffc0000000000 R11: fffff52001c09fbd R12: dffffc0000000000 R13: ffff8880304a3398 R14: ffff8880304a2810 R15: ffff8880304a2778 resume_user_mode_work+0x5e/0x80 include/linux/resume_user_mode.h:50 exit_to_user_mode_loop kernel/entry/common.c:43 [inline] exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] irqentry_exit_to_user_mode+0x90/0x120 kernel/entry/common.c:73 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7f4e8e85eb58 Code: 5d 41 5c 41 5e c3 0f 1f 40 00 48 8b 44 24 18 48 8b 1c 24 48 8b 70 70 8b 78 08 48 8d 53 30 e8 df 57 ff ff 48 89 83 88 00 00 00 48 fe ff ff 0f 1f 00 8b 7c 24 14 48 8d 74 24 40 ba 0f 00 00 00 RSP: 002b:00007f4e8f81c060 EFLAGS: 00000202 RAX: 0000000000000006 RBX: 00007f4e8ebc5fa0 RCX: 00007f4e8ea11e19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007f4e8ea11e19 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4e8ebc6038 R14: 00007f4e8ebc5fa0 R15: 00007ffd49116e18 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5856 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xd44/0x12d0 kernel/smp.c:877 Code: 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 61 5e 0b 00 eb 38 f3 90 42 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 <74> 1e e8 45 5e 0b 00 eb e4 44 89 e1 80 e1 07 80 c1 03 38 c1 7c e2 RSP: 0018:ffffc90003fff340 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 1ffff110170c8341 RCX: ffff88802aba9e00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90003fff4c0 R08: ffffffff8fa38037 R09: 1ffffffff1f47006 R10: dffffc0000000000 R11: fffffbfff1f47007 R12: ffff8880b8641a08 R13: dffffc0000000000 R14: ffff8880b873b1c0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125d1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000df36000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1044 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline] flush_tlb_mm_range+0x6b1/0x12d0 arch/x86/mm/tlb.c:1451 tlb_flush arch/x86/include/asm/tlb.h:23 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:490 [inline] tlb_flush_mmu+0x1a7/0x680 mm/mmu_gather.c:403 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:497 free_ldt_pgtables+0x17b/0x320 arch/x86/kernel/ldt.c:411 arch_exit_mmap arch/x86/include/asm/mmu_context.h:234 [inline] exit_mmap+0x17c/0xb50 mm/mmap.c:1266 __mmput+0x118/0x420 kernel/fork.c:1130 exit_mm+0x1da/0x2c0 kernel/exit.c:582 do_exit+0x648/0x2300 kernel/exit.c:949 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 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:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc517184e13 Code: Unable to access opcode bytes at 0x7fc517184de9. RSP: 002b:00007fff86bc4948 EFLAGS: 00000202 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 00000000000016ef RCX: 00007fc517184e13 RDX: 0000000040000000 RSI: 00007fff86bc495c RDI: 00000000ffffffff RBP: 00007fff86bc495c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008 R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000