watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.2.39:6028] Modules linked in: irq event stamp: 12256631 hardirqs last enabled at (12256630): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:357 hardirqs last disabled at (12256631): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (12036836): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last enabled at (12036836): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (12036836): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 softirqs last disabled at (12036839): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last disabled at (12036839): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (12036839): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 CPU: 0 UID: 0 PID: 6028 Comm: syz.2.39 Not tainted 6.12.0-rc4-syzkaller-g09048d22b782 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194 Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 2e ff 2d f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 93 48 92 f5 65 8b 05 a4 f2 32 74 85 c0 74 43 48 c7 04 24 0e 36 RSP: 0018:ffffc900000078c0 EFLAGS: 00000206 RAX: 4058c7acc7dad200 RBX: 1ffff92000000f1c RCX: ffffffff8170be0a RDX: dffffc0000000000 RSI: ffffffff8c0acdc0 RDI: 0000000000000001 RBP: ffffc90000007950 R08: ffffffff942d08c7 R09: 1ffffffff285a118 R10: dffffc0000000000 R11: fffffbfff285a119 R12: dffffc0000000000 R13: 1ffff92000000f18 R14: ffffc900000078e0 R15: 0000000000000246 FS: 00007f60152126c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c31c687 CR3: 000000007dffc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: debug_object_assert_init+0x2d0/0x440 lib/debugobjects.c:899 debug_timer_assert_init kernel/time/timer.c:846 [inline] debug_assert_init kernel/time/timer.c:891 [inline] __timer_delete+0xad/0x380 kernel/time/timer.c:1413 del_timer include/linux/timer.h:202 [inline] lapb_start_t1timer net/lapb/lapb_timer.c:38 [inline] lapb_t1timer_expiry+0x6c0/0xb20 net/lapb/lapb_timer.c:202 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1794 expire_timers kernel/time/timer.c:1845 [inline] __run_timers kernel/time/timer.c:2419 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2430 run_timer_base kernel/time/timer.c:2439 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2449 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 Code: 89 fb e8 23 00 00 00 48 8b 3d 94 3a 9d 0c 48 89 de 5b e9 23 24 5e 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 00 d8 03 00 65 8b 15 30 00 RSP: 0018:ffffc900047e7578 EFLAGS: 00000246 RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffff888066a31e00 RDX: ffffc9000b2ba000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900047e7780 R08: ffffffff8188d494 R09: 1ffff110170c7f9a R10: dffffc0000000000 R11: ffffed10170c7f9b R12: dffffc0000000000 R13: ffff8880b863fcc0 R14: 0000000000000002 R15: ffff8880b863fcc8 find_next_bit include/linux/find.h:66 [inline] smp_call_function_many_cond+0x1352/0x2ca0 kernel/smp.c:834 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1051 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2085 [inline] text_poke_bp_batch+0x726/0xb30 arch/x86/kernel/alternative.c:2357 text_poke_flush arch/x86/kernel/alternative.c:2486 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 tracepoint_add_func+0x953/0x9e0 kernel/tracepoint.c:361 tracepoint_probe_register_prio kernel/tracepoint.c:511 [inline] tracepoint_probe_register+0x105/0x160 kernel/tracepoint.c:531 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline] perf_trace_event_init+0x478/0x930 kernel/trace/trace_event_perf.c:202 perf_trace_init+0x243/0x2e0 kernel/trace/trace_event_perf.c:226 perf_tp_event_init+0x8d/0x110 kernel/events/core.c:10357 perf_try_init_event+0x146/0x810 kernel/events/core.c:11891 perf_init_event kernel/events/core.c:11977 [inline] perf_event_alloc+0x135f/0x2310 kernel/events/core.c:12259 __do_sys_perf_event_open kernel/events/core.c:12766 [inline] __se_sys_perf_event_open+0xb1f/0x3870 kernel/events/core.c:12657 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f601437e719 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:00007f6015212038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f6014535f80 RCX: 00007f601437e719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f60143f1616 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6014535f80 R15: 00007ffcda8b1998 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6024 Comm: syz.1.37 Not tainted 6.12.0-rc4-syzkaller-g09048d22b782 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:kasan_check_range+0xb/0x290 mm/kasan/generic.c:188 Code: 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 41 57 41 56 41 54 <53> b0 01 48 85 f6 0f 84 a0 01 00 00 4c 8d 04 37 49 39 f8 0f 82 56 RSP: 0018:ffffc90000a177d8 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff813eb8f7 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff901d22a8 RBP: 0000000000000000 R08: ffffffff8135a601 R09: 1ffffffff203a455 R10: dffffc0000000000 R11: fffffbfff203a456 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f1c3bdf16c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020032000 CR3: 0000000030188000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] cpumask_test_cpu include/linux/cpumask.h:570 [inline] cpu_online include/linux/cpumask.h:1117 [inline] trace_local_timer_entry arch/x86/include/asm/trace/irq_vectors.h:41 [inline] __sysvec_apic_timer_interrupt+0x77/0x420 arch/x86/kernel/apic/apic.c:1054 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_count_add+0x44/0x190 kernel/sched/core.c:5799 Code: 00 00 00 fc ff df 42 0f b6 04 38 84 c0 0f 85 ed 00 00 00 83 3d bc 4c da 18 00 75 07 65 8b 05 7b ab a0 7e 65 01 1d 74 ab a0 7e <48> c7 c0 40 79 3d 9a 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 e4 00 RSP: 0018:ffffc90000a178f0 EFLAGS: 00000206 RAX: 0000000000000302 RBX: 0000000000000001 RCX: ffffffff9a3d7903 RDX: dffffc0000000000 RSI: ffffffff81fedc4c RDI: 0000000000000001 RBP: ffffc90000a17a18 R08: 0000000000000001 R09: ffffc90000a17ad0 R10: ffffc90000a17a30 R11: ffffffff818090c0 R12: dffffc0000000000 R13: ffffc90000a179e0 R14: ffffffff81fedc4c R15: dffffc0000000000 unwind_next_frame+0xb0/0x22d0 arch/x86/kernel/unwind_orc.c:479 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 kvfree_call_rcu+0xfc/0x790 kernel/rcu/tree.c:3810 cfg80211_update_known_bss+0xb45/0x1590 net/wireless/scan.c:1891 __cfg80211_bss_update+0x153/0x2030 net/wireless/scan.c:1938 cfg80211_inform_single_bss_data+0xd82/0x2090 net/wireless/scan.c:2329 cfg80211_inform_bss_data+0x3ce/0x5e70 net/wireless/scan.c:3184 cfg80211_inform_bss_frame_data+0x3b8/0x720 net/wireless/scan.c:3279 ieee80211_bss_info_update+0x8a7/0xbc0 net/mac80211/scan.c:226 ieee80211_scan_rx+0x526/0x9c0 net/mac80211/scan.c:340 __ieee80211_rx_handle_packet net/mac80211/rx.c:5225 [inline] ieee80211_rx_list+0x2b02/0x3780 net/mac80211/rx.c:5462 ieee80211_rx_napi+0x18a/0x3c0 net/mac80211/rx.c:5485 ieee80211_rx include/net/mac80211.h:5138 [inline] ieee80211_handle_queued_frames+0xe7/0x1e0 net/mac80211/main.c:439 tasklet_action_common+0x321/0x4d0 kernel/softirq.c:784 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:preempt_schedule_irq+0xf6/0x1c0 kernel/sched/core.c:7012 Code: 89 f5 49 c1 ed 03 eb 0d 48 f7 03 08 00 00 00 0f 84 8b 00 00 00 bf 01 00 00 00 e8 65 e1 93 f5 e8 b0 53 cd f5 fb bf 01 00 00 00 e5 ab ff ff 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 55 9a 2f f6 48 RSP: 0018:ffffc900044def40 EFLAGS: 00000286 RAX: f0c42eb9fa723900 RBX: 1ffff9200089bdf0 RCX: ffffffff8170be0a RDX: dffffc0000000000 RSI: ffffffff8c0acdc0 RDI: 0000000000000001 RBP: ffffc900044df000 R08: ffffffff942d08c7 R09: 1ffffffff285a118 R10: dffffc0000000000 R11: fffffbfff285a119 R12: 1ffff9200089bde8 R13: 1ffff9200089bdec R14: ffffc900044def60 R15: dffffc0000000000 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire+0x468/0x550 Code: fd ff ff 48 89 df e8 57 9a 8e 00 e9 fe fc ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 33 ff ff ff e8 2d 9b 8e 00 e9 29 ff ff ff 0f 1e fa 45 89 f7 65 8b 05 f6 8d 93 7e 83 f8 08 0f 83 bf 00 00 RSP: 0018:ffffc900044df0c0 EFLAGS: 00000a02 RAX: f2f2f200f1f1f1f1 RBX: ffff8880784d0ab0 RCX: 0000000000000001 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8880784d0b18 RBP: ffffc900044df208 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100f09a157 R12: 1ffff9200089be20 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880784d0b18 down_read_trylock+0x24f/0x3c0 kernel/locking/rwsem.c:1566 mmap_read_trylock include/linux/mmap_lock.h:163 [inline] get_mmap_lock_carefully mm/memory.c:6103 [inline] lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:6163 do_user_addr_fault arch/x86/mm/fault.c:1361 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x1bf/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71 Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1 RSP: 0018:ffffc900044df438 EFLAGS: 00050206 RAX: ffffffff84bb1001 RBX: 00000000200300dc RCX: 0000000000002240 RDX: 0000000000000001 RSI: 0000000020032000 RDI: ffff88807a009f34 RBP: ffffc900044df5b8 R08: ffff88807a00c173 R09: 1ffff1100f40182e R10: dffffc0000000000 R11: ffffed100f40182f R12: 0000000000004164 R13: ffff88807a008010 R14: ffffc900044dfe18 R15: 1ffff9200089bfc3 copy_user_generic arch/x86/include/asm/uaccess_64.h:121 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:136 [inline] copy_from_user_iter lib/iov_iter.c:55 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:300 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] __copy_from_iter lib/iov_iter.c:249 [inline] _copy_from_iter+0x257/0x1d60 lib/iov_iter.c:260 copy_from_iter include/linux/uio.h:219 [inline] copy_from_iter_full include/linux/uio.h:236 [inline] sctp_user_addto_chunk+0x8c/0x220 net/sctp/sm_make_chunk.c:1565 sctp_datamsg_from_user+0x760/0xf20 net/sctp/chunk.c:269 sctp_sendmsg_to_asoc+0xf7e/0x1800 net/sctp/socket.c:1859 sctp_sendmsg+0x1bc3/0x3520 net/sctp/socket.c:2031 sock_sendmsg_nosec net/socket.c:729 [inline] __sock_sendmsg+0x1a6/0x270 net/socket.c:744 ____sys_sendmsg+0x52a/0x7e0 net/socket.c:2607 ___sys_sendmsg net/socket.c:2661 [inline] __sys_sendmsg+0x292/0x380 net/socket.c:2690 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1c3af7e719 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:00007f1c3bdf1038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f1c3b135f80 RCX: 00007f1c3af7e719 RDX: 0000000000000080 RSI: 0000000020000380 RDI: 000000000000000a RBP: 00007f1c3aff1616 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f1c3b135f80 R15: 00007ffd17907cb8