watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.4.18:6028] Modules linked in: irq event stamp: 10639937 hardirqs last enabled at (10639936): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (10639937): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (77538): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (77538): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (77538): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (77541): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (77541): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (77541): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6028 Comm: syz.4.18 Not tainted 6.16.0-rc4-syzkaller-gbf4807c89d8f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__do_kmalloc_node mm/slub.c:4329 [inline] RIP: 0010:__kmalloc_noprof+0x287/0x4f0 mm/slub.c:4340 Code: 24 09 80 0f 85 c5 00 00 00 f3 0f 1e fa 4c 89 e7 48 89 de 4c 89 fa 89 e9 e8 86 a5 0a 00 48 89 c3 41 8b 4c 24 18 48 8b 7c 24 08 <48> 89 c6 4c 89 fa 41 89 e8 41 b9 ff ff ff ff e8 f5 f6 ff ff 65 48 RSP: 0018:ffffc900000071a8 EFLAGS: 00000282 RAX: ffff888033481080 RBX: ffff888033481080 RCX: 0000000000000080 RDX: 00000000e9acb640 RSI: 0000000000000001 RDI: ffffffff8ac3d245 RBP: 0000000000000920 R08: 0000000004201da4 R09: 00000000e3cfaa0f R10: 0000000000000011 R11: fffff91ffff90e05 R12: ffff88801a441280 R13: ffff888033481080 R14: 0000000000000000 R15: 0000000000000048 FS: 00007ff4225b56c0(0000) GS:ffff888125c1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000030844000 CR4: 00000000003526f0 Call Trace: kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] cfg80211_inform_single_bss_data+0x905/0x1ac0 net/wireless/scan.c:2339 cfg80211_inform_bss_data+0x1fb/0x3b20 net/wireless/scan.c:3222 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3313 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:5183 [inline] ieee80211_rx_list+0x22fc/0x2d80 net/mac80211/rx.c:5420 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5443 ieee80211_rx include/net/mac80211.h:5185 [inline] ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:441 tasklet_action_common+0x369/0x580 kernel/softirq.c:829 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:preempt_count kernel/rcu/tree.c:3991 [inline] RIP: 0010:rcu_lockdep_current_cpu_online+0x6/0x120 kernel/rcu/tree.c:3995 Code: 03 89 df e9 4e ff ff ff 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 41 57 <41> 56 53 65 8b 0d 10 a6 f8 10 b0 01 f7 c1 00 00 f0 00 0f 85 d5 00 RSP: 0018:ffffc9000bbe7580 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 5f2b862ced26f100 RDX: ffff888034581e00 RSI: ffffffff8be28f20 RDI: ffffffff8be28ee0 RBP: ffffc9000bbe7698 R08: ffffc9000bbe762f R09: 0000000000000000 R10: ffffc9000bbe7620 R11: fffff5200177cec6 R12: 0000000000000001 R13: ffffc9000bbe7620 R14: ffff8880757f6580 R15: ffffffff8e00dec8 rcu_read_lock_held_common kernel/rcu/update.c:113 [inline] rcu_read_lock_held+0x1e/0x50 kernel/rcu/update.c:349 bpf_prog_run_array include/linux/bpf.h:2223 [inline] trace_call_bpf+0x1f4/0x850 kernel/trace/bpf_trace.c:146 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10891 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5834 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:2381 [inline] slab_free mm/slub.c:4643 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4745 getname_flags+0x3f8/0x540 fs/namei.c:163 getname include/linux/fs.h:2907 [inline] do_sys_openat2+0xbc/0x1c0 fs/open.c:1431 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1463 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: 0033:0x7ff42178e929 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:00007ff4225b5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007ff4219b6080 RCX: 00007ff42178e929 RDX: 0000000000200002 RSI: 0000000000000000 RDI: ffffffffffffff9c RBP: 00007ff421810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff4219b6080 R15: 00007ffe83b4c8e8 Sending NMI from CPU 0 to CPUs 1: rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted 6.16.0-rc4-syzkaller-gbf4807c89d8f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:vsnprintf+0x102/0xf00 lib/vsprintf.c:2817 Code: 48 89 44 24 30 4c 89 74 24 40 4d 89 f5 48 bb 00 00 00 00 00 fc ff df 45 31 f6 4c 89 ff 4c 89 f6 48 8d 54 24 48 e8 0e 0e 00 00 <48> 89 c5 49 89 d6 41 0f b6 fe 48 c7 c6 20 dc 88 8f e8 08 1c 55 f6 RSP: 0018:ffffc90000a080b0 EFLAGS: 00000086 RAX: ffffffff8b8b81c1 RBX: dffffc0000000000 RCX: ffff88801da9da00 RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000 RBP: ffffc90000a08230 R08: ffff88801da9da00 R09: 0000000000000002 R10: 0000000000000025 R11: 0000000000010100 R12: ffffc90000a081a0 R13: ffffc90000a08380 R14: 0000000000000000 R15: ffffffff8b8b81c0 FS: 0000000000000000(0000) GS:ffff888125d1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fda64af6c36 CR3: 0000000030846000 CR4: 00000000003526f0 Call Trace: sprintf+0xd9/0x120 lib/vsprintf.c:3037 print_time kernel/printk/printk.c:1381 [inline] info_print_prefix+0x155/0x310 kernel/printk/printk.c:1407 record_print_text+0x154/0x430 kernel/printk/printk.c:1456 printk_get_next_message+0x26d/0x7b0 kernel/printk/printk.c:3024 console_emit_next_record kernel/printk/printk.c:3092 [inline] console_flush_all+0x4ca/0xc40 kernel/printk/printk.c:3226 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0xc4/0x270 kernel/printk/printk.c:3325 vprintk_emit+0x5b7/0x7a0 kernel/printk/printk.c:2450 _printk+0xcf/0x120 kernel/printk/printk.c:2475 print_other_cpu_stall+0x189/0x1370 kernel/rcu/tree_stall.h:620 check_cpu_stall kernel/rcu/tree_stall.h:821 [inline] rcu_pending kernel/rcu/tree.c:3642 [inline] rcu_sched_clock_irq+0x9d1/0x1090 kernel/rcu/tree.c:2677 update_process_times+0x23c/0x2f0 kernel/time/timer.c:2473 tick_sched_handle kernel/time/tick-sched.c:276 [inline] tick_nohz_handler+0x39a/0x520 kernel/time/tick-sched.c:297 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x4e0/0xc60 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+0x10b/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+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:318 [inline] RIP: 0010:handle_softirqs+0x1b0/0x870 kernel/softirq.c:567 Code: 89 64 24 30 0f b7 db 48 c7 c7 c0 a4 89 8b e8 87 9d e9 09 65 66 c7 05 95 6a 1a 11 00 00 e8 18 45 42 00 fb 49 c7 c7 c0 c0 e0 8d ff ff ff ff 0f bc c3 41 89 c5 41 ff c5 0f 84 c2 03 00 00 89 5c RSP: 0018:ffffc900001d7b60 EFLAGS: 00000286 RAX: c4f2a28008f15a00 RBX: 0000000000000040 RCX: c4f2a28008f15a00 RDX: 0000000000000000 RSI: ffffffff8d996a93 RDI: ffffffff8be28f40 RBP: ffffc900001d7c70 R08: ffffffff8fa1d6f7 R09: 1ffffffff1f43ade R10: dffffc0000000000 R11: fffffbfff1f43adf R12: 000000000000000a R13: ffff88801da9f188 R14: dffffc0000000000 R15: ffffffff8de0c0c0 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:164 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245