syzbot

watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.0.6459:26235]
Modules linked in:
irq event stamp: 11871417
hardirqs last  enabled at (11871416): [<ffffffff8bad7f2e>] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242
hardirqs last disabled at (11871417): [<ffffffff8bad693e>] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056
softirqs last  enabled at (11846846): [<ffffffff8187fe2f>] __do_softirq kernel/softirq.c:656 [inline]
softirqs last  enabled at (11846846): [<ffffffff8187fe2f>] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last  enabled at (11846846): [<ffffffff8187fe2f>] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
softirqs last disabled at (11846849): [<ffffffff8187fe2f>] __do_softirq kernel/softirq.c:656 [inline]
softirqs last disabled at (11846849): [<ffffffff8187fe2f>] invoke_softirq kernel/softirq.c:496 [inline]
softirqs last disabled at (11846849): [<ffffffff8187fe2f>] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723
CPU: 1 UID: 0 PID: 26235 Comm: syz.0.6459 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:perf_tp_filter_match kernel/events/core.c:11302 [inline]
RIP: 0010:perf_tp_event_match kernel/events/core.c:11319 [inline]
RIP: 0010:perf_tp_event+0x347/0x2a90 kernel/events/core.c:11407
Code: 00 00 4d 85 e4 4c 0f 44 e3 49 81 c4 88 05 00 00 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 ed f5 36 00 49 8b 3c 24 <48> 85 ff 0f 85 f9 02 00 00 e8 5b b7 cc ff 48 c7 84 24 c0 00 00 00
RSP: 0018:ffffc90000a08280 EFLAGS: 00000246
RAX: 1ffff110122a8d41 RBX: ffff888091546480 RCX: ffff88802f1bbd00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000a08528 R08: ffffc90000a0848f R09: 0000000000000000
R10: ffffc90000a08480 R11: fffff52000141092 R12: ffff888091546a08
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8733480
FS:  00007fc57e50c6c0(0000) GS:ffff888125564000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3090fff8 CR3: 0000000034c28000 CR4: 00000000003526f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:11337
 do_perf_trace_lock include/trace/events/lock.h:50 [inline]
 perf_trace_lock+0x32d/0x410 include/trace/events/lock.h:50
 __do_trace_lock_release include/trace/events/lock.h:69 [inline]
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0x392/0x3d0 kernel/locking/lockdep.c:5879
 rcu_lock_release include/linux/rcupdate.h:322 [inline]
 rcu_read_unlock include/linux/rcupdate.h:881 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1193 [inline]
 unwind_next_frame+0x1aaa/0x23c0 arch/x86/kernel/unwind_orc.c:695
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 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
 __call_rcu_common kernel/rcu/tree.c:3131 [inline]
 call_rcu+0xee/0x890 kernel/rcu/tree.c:3251
 slab_free_hook mm/slub.c:2656 [inline]
 slab_free mm/slub.c:6143 [inline]
 kmem_cache_free+0x439/0x630 mm/slub.c:6273
 inet_twsk_free net/ipv4/inet_timewait_sock.c:80 [inline]
 inet_twsk_put+0xf2/0x150 net/ipv4/inet_timewait_sock.c:87
 call_timer_fn+0x192/0x640 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2373 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2385
 run_timer_base kernel/time/timer.c:2394 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2404
 handle_softirqs+0x22a/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:kasan_check_range+0x5/0x2c0 mm/kasan/generic.c:199
Code: 48 c7 c6 59 4d 16 8e e8 39 5c f8 fe 90 0f 0b cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 55 <41> 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 ae 01 00 00 4c 8d
RSP: 0018:ffffc900053f7448 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffff8194f8eb
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90118cb0
RBP: ffffc900053f7680 R08: ffffffff90118cb7 R09: 1ffffffff2023196
R10: dffffc0000000000 R11: fffffbfff2023197 R12: ffff88802f1bbd00
R13: ffff888028f73d00 R14: dffffc0000000000 R15: 1ffff110170e771c
 instrument_atomic_read include/linux/instrumented.h:82 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 cpumask_test_cpu include/linux/cpumask.h:649 [inline]
 cpu_online include/linux/cpumask.h:1231 [inline]
 trace_sched_exit_tp+0x2b/0x150 include/trace/events/sched.h:886
 __schedule+0x15f3/0x52d0 kernel/sched/core.c:6918
 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7235
 irqentry_exit+0x599/0x620 kernel/entry/common.c:239
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__lookup_slow+0x0/0x410 fs/namei.c:1892
Code: 48 8b 3c 24 e9 ce fe ff ff e8 1c 25 80 ff e9 dc fe ff ff 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 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48
RSP: 0018:ffffc900053f77b0 EFLAGS: 00000292
RAX: 0000000080000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffff88805ad15608 RDI: ffffc900053f7c30
RBP: 1ffff92000a7ef8b R08: ffff88805ae5ee37 R09: 1ffff1100b5cbdc6
R10: dffffc0000000000 R11: ffffed100b5cbdc7 R12: ffff88805ae5ee28
R13: dffffc0000000000 R14: ffff88805ad15608 R15: ffffc900053f7c30
 lookup_slow+0x53/0x70 fs/namei.c:1933
 walk_component fs/namei.c:2279 [inline]
 lookup_last fs/namei.c:2780 [inline]
 path_lookupat+0x3f5/0x8c0 fs/namei.c:2804
 do_o_path+0x9f/0x210 fs/namei.c:4801
 path_openat+0x3027/0x3860 fs/namei.c:4823
 do_file_open+0x23e/0x4a0 fs/namei.c:4859
 do_sys_openat2+0x113/0x200 fs/open.c:1366
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1383
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc57d59c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc57e50c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc57d816090 RCX: 00007fc57d59c799
RDX: 0000000000200002 RSI: 00002000000002c0 RDI: ffffffffffffff9c
RBP: 00007fc57d632bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc57d816128 R14: 00007fc57d816090 R15: 00007ffc10f5c9d8
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 19 Comm: migration/0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Stopper: 0x0 <- 0x0
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:37 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:139 [inline]
RIP: 0010:wrmsrq arch/x86/include/asm/msr.h:199 [inline]
RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:208
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc cc 89 f6 31 d2 e9 96 8b 76 03 66 0f 1f 44 00
RSP: 0018:ffffc900000067e0 EFLAGS: 00000046
RAX: 00000000000000ad RBX: ffff8880b8623e40 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 00000000000000ad RDI: 0000000000000838
RBP: 0000000000000000 R08: ffffffff81b2c675 R09: ffffffff9a2b6508
R10: 0000000000000003 R11: ffffffff8173c750 R12: 0000000010003ab8
R13: dffffc0000000000 R14: 00000000000000ad R15: 0000000000000020
FS:  0000000000000000(0000) GS:ffff888125464000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6e88be0680 CR3: 0000000078d0e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 apic_write arch/x86/include/asm/apic.h:405 [inline]
 lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:418
 clockevents_program_event+0x1c9/0x350 kernel/time/clockevents.c:334
 hrtimer_interrupt+0xb08/0x1010 kernel/time/hrtimer.c:1924
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x460 arch/x86/kernel/apic/apic.c:1062
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1056
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x20b/0x2e0 kernel/locking/lockdep.c:5872
Code: e9 30 ff ff ff e8 d5 ed 0b 0a f7 c3 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 51 3b 7a 11 48 3b 44 24 30 75 33 fb 48 83 c4 38 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d ee 5a 73
RSP: 0018:ffffc90000006a58 EFLAGS: 00000282
RAX: 1876c77a85160600 RBX: 0000000000000246 RCX: 0000000080000302
RDX: 000000001959f28c RSI: ffffffff8e16369b RDI: ffffffff8c27ae80
RBP: 0000000000000000 R08: ffffffff81767a45 R09: ffffffff8e7602e0
R10: ffffc90000006bb8 R11: ffffffff81b0bb90 R12: 0000000000000002
R13: ffffffff8e7602e0 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1193 [inline]
 unwind_next_frame+0xc2/0x23c0 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __do_kmalloc_node mm/slub.c:5238 [inline]
 __kmalloc_noprof+0x35c/0x760 mm/slub.c:5250
 kmalloc_noprof include/linux/slab.h:954 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 ieee802_11_parse_elems_full+0x159/0x2ab0 net/mac80211/parse.c:1051
 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2480 [inline]
 ieee80211_inform_bss+0x161/0x1160 net/mac80211/scan.c:79
 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline]
 cfg80211_inform_single_bss_data+0xd08/0x1b70 net/wireless/scan.c:2372
 cfg80211_inform_bss_data+0x266/0x3c40 net/wireless/scan.c:3226
 cfg80211_inform_bss_frame_data+0x3c7/0x760 net/wireless/scan.c:3317
 ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230
 ieee80211_scan_rx+0x552/0xa40 net/mac80211/scan.c:364
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5305 [inline]
 ieee80211_rx_list+0x29e5/0x3710 net/mac80211/rx.c:5588
 ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5611
 ieee80211_rx include/net/mac80211.h:5267 [inline]
 ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452
 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925
 handle_softirqs+0x22a/0x870 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x5f/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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:cpu_stop_should_run+0xa2/0xd0 kernel/stop_machine.c:484
Code: e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 57 ed 6d 00 49 8b 07 31 ed 4c 39 f8 40 0f 95 c5 48 89 df 4c 89 f6 e8 b0 28 ee 09 89 e8 <5b> 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc e8 ab ae 03 00 48 c7 c7
RSP: 0018:ffffc90000187d58 EFLAGS: 00000282
RAX: 0000000000000000 RBX: ffff8880b8628e68 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8def311b RDI: 00000000ffffffff
RBP: 0000000000000000 R08: ffffffff90118cb7 R09: 1ffffffff2023196
R10: dffffc0000000000 R11: fffffbfff2023197 R12: dffffc0000000000
R13: ffff88801dae3660 R14: 0000000000000246 R15: ffff8880b8628eb0
 smpboot_thread_fn+0x490/0xa50 kernel/smpboot.c:154
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>