watchdog: BUG: soft lockup - CPU#0 stuck for 142s! [syz.5.3200:19175] Modules linked in: irq event stamp: 9113063 hardirqs last enabled at (9113062): [] irqentry_exit+0x5e8/0x670 kernel/entry/common.c:219 hardirqs last disabled at (9113063): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (145916): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (145916): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (145916): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 softirqs last disabled at (145919): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (145919): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (145919): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 19175 Comm: syz.5.3200 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__unwind_start+0x5b1/0x760 arch/x86/kernel/unwind_orc.c:773 Code: 01 75 27 48 8b 44 24 08 80 3c 30 00 4c 8b 64 24 18 74 08 4c 89 e7 e8 6e ed b2 00 48 8b 44 24 10 49 39 04 24 0f 87 1b fb ff ff <48> 89 df e8 b7 d1 ff ff 48 be 00 00 00 00 00 fc ff df 48 8b 04 24 RSP: 0018:ffffc90000006d28 EFLAGS: 00000287 RAX: ffffc90000006e10 RBX: ffffc90000006d88 RCX: 0000000000000001 RDX: ffffc90000006e18 RSI: dffffc0000000000 RDI: ffffffff8bc08300 RBP: 1ffff92000000db2 R08: ffffc90000006d00 R09: 0000000000000000 R10: ffffc90000006d88 R11: fffff52000000dbd R12: ffffc90000006dc0 R13: ffffc90000006d98 R14: 1ffff92000000db3 R15: ffffc90000006d90 FS: 00007f42dc7f66c0(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5d139ef358 CR3: 000000005c03a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556 kvfree_call_rcu+0x106/0x440 mm/slab_common.c:1994 cfg80211_update_known_bss+0x830/0x1590 net/wireless/scan.c:1944 __cfg80211_bss_update+0x147/0x2110 net/wireless/scan.c:1989 cfg80211_inform_single_bss_data+0xbc8/0x1ad0 net/wireless/scan.c:2369 cfg80211_inform_bss_data+0x203/0x3b40 net/wireless/scan.c:3228 cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319 ieee80211_bss_info_update+0x749/0x9e0 net/mac80211/scan.c:230 ieee80211_scan_rx+0x593/0xa20 net/mac80211/scan.c:359 __ieee80211_rx_handle_packet net/mac80211/rx.c:5287 [inline] ieee80211_rx_list+0x2485/0x2f90 net/mac80211/rx.c:5544 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5567 ieee80211_rx include/net/mac80211.h:5216 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_irq+0x48/0xa0 kernel/sched/core.c:7190 Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 54 bf 01 00 00 00 e8 03 db 35 f6 e8 9e ee 6d f6 fb bf 01 00 00 00 c3 a9 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 24 f0 6d f6 bf 01 RSP: 0018:ffffc90004f3fa98 EFLAGS: 00000202 RAX: 00000000000239fd RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000006 RSI: ffffffff8d792148 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff8f822377 R09: 1ffffffff1f0446e R10: dffffc0000000000 R11: fffffbfff1f0446f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline] RIP: 0010:write_comp_data kernel/kcov.c:245 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x8/0x90 kernel/kcov.c:314 Code: 48 89 44 11 20 c3 cc cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 14 25 08 10 80 92 65 8b 0d 18 14 bf 10 81 e1 00 01 ff 00 RSP: 0018:ffffc90004f3fbb8 EFLAGS: 00000246 RAX: ffffffff81f2b80e RBX: 0000000000000000 RCX: ffff88808b043d00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90004f3fd10 R08: ffffffff8f822377 R09: 1ffffffff1f0446e R10: dffffc0000000000 R11: fffffbfff1f0446f R12: 1ffff110116087a2 R13: ffff88808b043d14 R14: ffffc90004f3fc40 R15: dffffc0000000000 perf_install_in_context+0x5fe/0x8f0 kernel/events/core.c:3105 __do_sys_perf_event_open kernel/events/core.c:13814 [inline] __se_sys_perf_event_open+0x1966/0x1d90 kernel/events/core.c:13456 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f42de58f749 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:00007f42dc7f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f42de7e6090 RCX: 00007f42de58f749 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0 RBP: 00007f42de613f91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f42de7e6128 R14: 00007f42de7e6090 R15: 00007fffccd45be8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:trace_hardirqs_off+0x24/0x40 kernel/trace/trace_preemptirq.c:107 Code: 90 90 90 90 90 90 f3 0f 1e fa 53 48 8b 5c 24 08 48 89 df e8 9e e1 90 09 65 8b 05 a7 60 b8 10 85 c0 74 07 5b e9 3d bf 93 09 cc <65> c7 05 91 60 b8 10 01 00 00 00 48 89 df 5b e9 b8 fe ff ff 0f 1f RSP: 0018:ffffc900001d7be0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffffff81854cb2 RCX: 0000000080000100 RDX: 0000000000000001 RSI: ffffffff8d792148 RDI: ffffffff8bc083e0 RBP: ffff88807bf31650 R08: ffff88807bf3165f R09: 1ffff1100f7e62cb R10: dffffc0000000000 R11: ffffed100f7e62cc R12: ffff88807bf31658 R13: 0000000000000006 R14: 0000000000000000 R15: 1ffff1100f7e62ca FS: 0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2097915000 CR3: 000000007eb64000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff1 DR7: 0000000000000600 Call Trace: tasklet_action_common+0x192/0x4b0 kernel/softirq.c:940 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246