watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.4.255:8004] Modules linked in: irq event stamp: 11493725 hardirqs last enabled at (11493724): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11493725): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (11484846): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (11484846): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (11484846): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (11484849): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (11484849): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (11484849): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 8004 Comm: syz.4.255 Not tainted 6.15.0-rc4-syzkaller-gf263336a41da #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:109 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:127 [inline] RIP: 0010:lock_acquire+0xcd/0x360 kernel/locking/lockdep.c:5862 Code: 0f 85 eb 00 00 00 65 48 8b 04 25 08 40 75 92 83 b8 ec 0a 00 00 00 0f 85 d5 00 00 00 48 c7 44 24 30 00 00 00 00 9c 8f 44 24 30 <4c> 89 74 24 10 4d 89 fe 4c 8b 7c 24 30 fa 48 c7 c7 55 d5 75 8d e8 RSP: 0018:ffffc90000006b58 EFLAGS: 00000246 RAX: ffff88802650da00 RBX: 0000000000000000 RCX: e70dfe839e241c00 RDX: 0000000000000000 RSI: ffffffff81719a12 RDI: 1ffffffff1be770c RBP: ffffffff817199f5 R08: 0000000000000000 R09: 0000000000000000 R10: ffffc90000006808 R11: ffffffff81acaa70 R12: 0000000000000002 R13: ffffffff8df3b860 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f941a7f66c0(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffa5e000000 CR3: 0000000030eba000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: 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+0xc2/0x2390 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:2398 [inline] slab_free mm/slub.c:4656 [inline] kfree+0x193/0x440 mm/slub.c:4855 ieee80211_inform_bss+0xbd9/0x10a0 net/mac80211/scan.c:160 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd02/0x1ac0 net/wireless/scan.c:2367 cfg80211_inform_bss_data+0x1f6/0x3ad0 net/wireless/scan.c:3222 cfg80211_inform_bss_frame_data+0x362/0x700 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x527/0x9b0 net/mac80211/scan.c:340 __ieee80211_rx_handle_packet net/mac80211/rx.c:5179 [inline] ieee80211_rx_list+0x22fc/0x2d80 net/mac80211/rx.c:5416 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5439 ieee80211_rx include/net/mac80211.h:5179 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:441 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_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:7090 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 eb c3 39 f6 e8 86 43 70 f6 fb bf 01 00 00 00 4b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc9000481fa40 EFLAGS: 00000286 RAX: e70dfe839e241c00 RBX: 0000000000000000 RCX: e70dfe839e241c00 RDX: 0000000000000007 RSI: ffffffff8d749ffa RDI: 0000000000000001 RBP: ffffc9000481faf0 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000903f48 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:tomoyo_check_acl+0x109/0x400 security/tomoyo/domain.c:173 Code: e8 bc e3 50 fd e9 b4 00 00 00 4d 8d 7e 19 4c 89 f8 48 c1 e8 03 0f b6 04 18 84 c0 0f 85 1e 01 00 00 45 0f b6 27 48 8b 44 24 30 <0f> b6 04 18 84 c0 0f 85 24 01 00 00 48 8b 44 24 08 44 0f b6 38 45 RSP: 0018:ffffc9000481fbb0 EFLAGS: 00000246 RAX: 1ffff92000903fa1 RBX: dffffc0000000000 RCX: 0000000000000002 RDX: ffff88802650da00 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff888026e87310 R08: ffff88802650da00 R09: 0000000000000002 R10: 000000000000005c R11: ffffffff846f3010 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880347b3a80 R15: ffff8880347b3a99 tomoyo_path_number_perm+0x2dc/0x5a0 security/tomoyo/file.c:733 security_file_ioctl+0xcb/0x2d0 security/security.c:2913 __do_sys_ioctl fs/ioctl.c:900 [inline] __se_sys_ioctl+0x47/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f941c98e969 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:00007f941a7f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f941cbb5fa0 RCX: 00007f941c98e969 RDX: 0000000000000009 RSI: 0000000040042408 RDI: 0000000000000008 RBP: 00007f941ca10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f941cbb5fa0 R15: 00007ffcda5a6c98 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 18 Comm: rcu_exp_gp_kthr Not tainted 6.15.0-rc4-syzkaller-gf263336a41da #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:tick_sched_do_timer kernel/time/tick-sched.c:242 [inline] RIP: 0010:tick_nohz_handler+0x12b/0x520 kernel/time/tick-sched.c:290 Code: e8 4a a5 6f 00 49 8d 44 24 e8 48 89 04 24 48 8b 1d da 06 0f 0c 4c 89 f7 48 89 de e8 ff b5 0d 00 49 8d 6c 24 f0 49 39 de 75 48 <48> 89 e8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 0f b6 04 30 RSP: 0018:ffffc90000a08cf0 EFLAGS: 00000046 RAX: ffffffff81b20b31 RBX: 0000000100009e13 RCX: ffff88801c6c9e00 RDX: 0000000000010000 RSI: 0000000100009e13 RDI: 0000000100009e13 RBP: ffff8880b8928008 R08: 0000000000000000 R09: 0000000000080000 R10: 0000000000000000 R11: ffffffff8166cd10 R12: ffff8880b8928018 R13: 1ffff11017125002 R14: 0000000100009e13 R15: ffff8880b8928010 FS: 0000000000000000(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005649dc6c6950 CR3: 000000004e1b8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __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:1038 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline] RIP: 0010:vprintk_emit+0x58f/0x7a0 kernel/printk/printk.c:2449 Code: 85 32 01 00 00 e8 41 f3 1e 00 41 89 df 4d 85 f6 48 8b 1c 24 75 07 e8 30 f3 1e 00 eb 06 e8 29 f3 1e 00 fb 48 c7 c7 80 fa f2 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 f9 3f RSP: 0018:ffffc90000177980 EFLAGS: 00000293 RAX: ffffffff81a0cba7 RBX: ffffffff81a0ca64 RCX: ffff88801c6c9e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8df2fa80 RBP: ffffc90000177a90 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: dffffc0000000000 R13: 1ffff9200002ef34 R14: 0000000000000200 R15: 0000000000000041 _printk+0xcf/0x120 kernel/printk/printk.c:2475 synchronize_rcu_expedited_stall+0x61/0x1170 kernel/rcu/tree_exp.h:570 synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:668 [inline] rcu_exp_wait_wake kernel/rcu/tree_exp.h:687 [inline] rcu_exp_sel_wait_wake+0x7a1/0xd40 kernel/rcu/tree_exp.h:721 kthread_worker_fn+0x504/0xb60 kernel/kthread.c:1010 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245