watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.2.298:6757] Modules linked in: irq event stamp: 11363775 hardirqs last enabled at (11363774): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (11363775): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (9246666): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (9246666): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (9246666): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (9246669): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (9246669): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (9246669): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6757 Comm: syz.2.298 Not tainted 6.15.0-syzkaller-g3ce7cdde66e6 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5875 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 3b 8a fe 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90000007478 EFLAGS: 00000206 RAX: 909f141c3981c400 RBX: 0000000000000000 RCX: 909f141c3981c400 RDX: 0000000000000000 RSI: ffffffff8db69c35 RDI: ffffffff8be28800 RBP: ffffffff81729de5 R08: 0000000000000000 R09: ffffffff81729de5 R10: dffffc0000000000 R11: fffff91fffec1005 R12: 0000000000000002 R13: ffffffff8e13f060 R14: 0000000000000000 R15: 0000000000000246 FS: 00007fa81f8966c0(0000) GS:ffff888125c54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9c8485eba8 CR3: 000000006c192000 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 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4249 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:660 alloc_skb include/linux/skbuff.h:1336 [inline] ndisc_alloc_skb+0x9f/0x480 net/ipv6/ndisc.c:423 ndisc_send_rs+0x2b5/0x630 net/ipv6/ndisc.c:707 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4041 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 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:rcu_is_watching+0x67/0xb0 kernel/rcu/tree.c:746 Code: 89 f7 e8 cc 08 7d 00 48 c7 c3 58 ef 9d 92 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d 89 99 f5 10 <74> 11 83 e0 04 c1 e8 02 5b 41 5e 41 5f c3 cc cc cc cc cc e8 f1 6f RSP: 0018:ffffc90003a17220 EFLAGS: 00000206 RAX: 000000000002275c RBX: ffff8880b8632f58 RCX: 909f141c3981c400 RDX: ffff888079809e00 RSI: ffffffff8be287e0 RDI: ffffffff8be287a0 RBP: ffffc90003a17338 R08: 0000000000000000 R09: ffffffff81cb84c7 R10: 6f6c5f646165725f R11: 64656863735f6b63 R12: 0000000000000001 R13: 1ffff92000742e54 R14: ffffffff8dba2c60 R15: dffffc0000000000 rcu_read_lock include/linux/rcupdate.h:842 [inline] trace_call_bpf+0xfb/0x850 kernel/trace/bpf_trace.c:145 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10866 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_sched include/linux/rcupdate.h:932 [inline] pfn_valid include/linux/mmzone.h:2158 [inline] __virt_addr_valid+0x1e5/0x5c0 arch/x86/mm/physaddr.c:65 kasan_addr_to_slab+0xf/0x90 mm/kasan/common.c:37 kasan_record_aux_stack+0xf/0xd0 mm/kasan/generic.c:533 __call_rcu_common kernel/rcu/tree.c:3090 [inline] call_rcu+0x142/0x990 kernel/rcu/tree.c:3210 context_switch kernel/sched/core.c:5399 [inline] __schedule+0x16fd/0x4d00 kernel/sched/core.c:6785 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7108 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:perf_trace_init+0xa2/0x2d0 kernel/trace/trace_event_perf.c:223 Code: c0 30 1a 8e 0f 84 75 01 00 00 4c 89 24 24 4c 8d 63 30 4c 89 e0 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 17 01 00 00 4d 63 24 24 <4c> 89 ff 4c 89 e6 e8 43 af f6 ff 4d 39 e7 0f 85 a9 00 00 00 4c 8d RSP: 0018:ffffc90003a17a78 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff8e7c2440 RCX: 0000000000080000 RDX: ffffc9000c569000 RSI: 0000000000003fd9 RDI: 0000000000003fda RBP: 0000000000000002 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203f R12: 0000000000000a10 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000156 perf_tp_event_init+0x8d/0x120 kernel/events/core.c:10807 perf_try_init_event+0x17c/0x870 kernel/events/core.c:12529 perf_init_event kernel/events/core.c:12627 [inline] perf_event_alloc+0x1357/0x2bb0 kernel/events/core.c:12902 __do_sys_perf_event_open kernel/events/core.c:13420 [inline] __se_sys_perf_event_open+0x772/0x1d70 kernel/events/core.c:13301 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: 0033:0x7fa81e98e929 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:00007fa81f896038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007fa81ebb5fa0 RCX: 00007fa81e98e929 RDX: ffff7fffffffffff RSI: 0000000000000000 RDI: 0000200000000500 RBP: 00007fa81ea10b39 R08: 0000000000000003 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa81ebb5fa0 R15: 00007ffd2b5d7218 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6754 Comm: syz.0.299 Not tainted 6.15.0-syzkaller-g3ce7cdde66e6 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:702 Code: 46 ed 65 0a e9 61 06 00 00 90 f3 0f 1e fa 0f 01 ca fc 6a ff e8 11 05 00 00 48 89 c4 48 89 e7 e8 56 ec 65 0a e9 41 06 00 00 90 0f 1e fa 0f 01 ca fc 6a ff e8 f1 04 00 00 48 89 c4 48 89 e7 e8 RSP: 0018:ffffc90000a08a98 EFLAGS: 00000046 RAX: 000000004530d264 RBX: ffffffff99ac5410 RCX: 0000000000000001 RDX: 000000000000008b RSI: 0000000000000000 RDI: ffffffff8df716a0 RBP: 000000000000cac0 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: ffffffff81679c70 R12: ffff88805c99b0a0 R13: ffff88806facf450 R14: 184bf17647e3ba5d R15: ffffffff8df716a0 FS: 0000000000000000(0000) GS:ffff888125d54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b9ef0879d8 CR3: 00000000628a2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: RIP: 0010:rdtsc_ordered arch/x86/include/asm/tsc.h:57 [inline] RIP: 0010:read_tsc+0xc/0x20 arch/x86/kernel/tsc.c:1134 Code: e9 e8 fe ff ff e8 84 6b fe 09 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa e8 d7 c4 58 00 0f 01 f9 <66> 90 48 c1 e2 20 48 09 d0 e9 16 3d 01 0a cc 0f 1f 44 00 00 90 90 RSP: 0018:ffffc90000a08ac0 EFLAGS: 00000246 tk_clock_read kernel/time/timekeeping.c:251 [inline] timekeeping_get_ns kernel/time/timekeeping.c:360 [inline] ktime_get_with_offset+0x10b/0x2a0 kernel/time/timekeeping.c:821 ktime_get_real include/linux/timekeeping.h:87 [inline] mac80211_hwsim_get_tsf_raw drivers/net/wireless/virtual/mac80211_hwsim.c:1208 [inline] __mac80211_hwsim_beacon_tx+0x2b8/0x6b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2257 mac80211_hwsim_beacon_tx+0x3f0/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2323 __iterate_interfaces+0x2a8/0x590 net/mac80211/util.c:761 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:797 mac80211_hwsim_beacon+0xbb/0x1c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2353 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x529/0xc60 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1842 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:__folio_rmap_sanity_checks+0x0/0x700 include/linux/rmap.h:409 Code: e0 68 96 8b e8 21 70 f5 ff 90 0f 0b 66 66 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 <55> 41 57 41 56 41 55 41 54 53 50 89 4c 24 04 89 d5 49 89 f7 48 89 RSP: 0018:ffffc90003cef308 EFLAGS: 00000246 RAX: ffffffff821221bc RBX: ffffea000187b540 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffea000187b540 RDI: ffffea000187b540 RBP: 0000000000000001 R08: ffffea000187b547 R09: 1ffffd400030f6a8 R10: dffffc0000000000 R11: fffff9400030f6a9 R12: ffffea000187b540 R13: ffff88802fb65500 R14: ffff888070511a00 R15: dffffc0000000000 __folio_remove_rmap mm/rmap.c:1694 [inline] folio_remove_rmap_ptes+0x3b/0xaf0 mm/rmap.c:1804 zap_present_folio_ptes mm/memory.c:1529 [inline] zap_present_ptes mm/memory.c:1590 [inline] do_zap_pte_range mm/memory.c:1691 [inline] zap_pte_range mm/memory.c:1735 [inline] zap_pmd_range mm/memory.c:1827 [inline] zap_pud_range mm/memory.c:1856 [inline] zap_p4d_range mm/memory.c:1877 [inline] unmap_page_range+0x1e59/0x41c0 mm/memory.c:1898 unmap_single_vma mm/memory.c:1941 [inline] unmap_vmas+0x399/0x580 mm/memory.c:1985 exit_mmap+0x248/0xb50 mm/mmap.c:1284 __mmput+0x118/0x420 kernel/fork.c:1121 exit_mm+0x1da/0x2c0 kernel/exit.c:581 do_exit+0x640/0x22e0 kernel/exit.c:943 do_group_exit+0x21c/0x2d0 kernel/exit.c:1104 get_signal+0x1286/0x1340 kernel/signal.c:3034 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:111 exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb5c558e929 Code: Unable to access opcode bytes at 0x7fb5c558e8ff. RSP: 002b:00007fb5c648a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: 0000000000000000 RBX: 00007fb5c57b5fa0 RCX: 00007fb5c558e929 RDX: 0000000000000007 RSI: 0000000040042408 RDI: 0000000000000006 RBP: 00007fb5c5610b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb5c57b5fa0 R15: 00007fff9e9aae78