watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.6.160:6632] Modules linked in: irq event stamp: 12187187 hardirqs last enabled at (12187186): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (12187187): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (10948604): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10948604): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10948604): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10948607): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10948607): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10948607): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6632 Comm: syz.6.160 Not tainted 6.15.0-syzkaller-gc11f34e30088 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:xfrm_lookup_with_ifid+0x450/0x1a70 net/xfrm/xfrm_policy.c:3233 Code: 0f 84 97 00 00 00 49 89 c7 e8 6c 63 b5 f7 e9 ab 00 00 00 48 8b 44 24 18 4c 8d 78 38 4c 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 <0f> 85 2f 14 00 00 45 0f b7 2f 44 89 ee 83 e6 02 45 31 ff 31 ff e8 RSP: 0018:ffffc90000a087c0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000100 RDX: ffff888025d19e00 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a088d0 R08: ffffc90000a0886f R09: 0000000000000000 R10: ffffc90000a08860 R11: fffff5200014110e R12: 000000000000000a R13: dffffc0000000000 R14: ffffc90000a089d0 R15: ffff8880349ad7b8 FS: 00007f37be8b26c0(0000) GS:ffff888125d54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f19af1182f0 CR3: 0000000075680000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: ndisc_send_skb+0x41f/0x1400 net/ipv6/ndisc.c:493 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_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:7108 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 4b ab 29 f6 e8 26 c3 60 f6 fb bf 01 00 00 00 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0018:ffffc900034d7ae0 EFLAGS: 00000282 RAX: e12156308a1b0a00 RBX: 0000000000000000 RCX: e12156308a1b0a00 RDX: 0000000000000000 RSI: ffffffff8d97cf77 RDI: 0000000000000001 RBP: ffffc900034d7b80 R08: ffffffff8fa101f7 R09: 1ffffffff1f4203e R10: dffffc0000000000 R11: fffffbfff1f4203f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200069af5c 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:path_from_stashed+0xaa/0x8f0 fs/libfs.c:2222 Code: 7f ff 48 89 5c 24 48 48 83 c3 08 49 89 dc 49 c1 ec 03 43 80 3c 3c 00 74 08 48 89 df e8 af f5 e2 ff 41 be 40 06 00 00 4c 03 33 <4c> 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 90 f5 e2 ff RSP: 0018:ffffc900034d7c40 EFLAGS: 00000282 RAX: ffffffff82413982 RBX: ffff88801be8c728 RCX: 0000000000080000 RDX: ffffc9001b31e000 RSI: 0000000000001d81 RDI: 0000000000001d82 RBP: ffffc900034d7d30 R08: ffff888075d91503 R09: 1ffff1100ebb22a0 R10: dffffc0000000000 R11: ffffed100ebb22a1 R12: 1ffff110037d18e5 R13: ffffc900034d7d60 R14: ffff88801b6fc640 R15: dffffc0000000000 pidfs_register_pid+0x108/0x1b0 fs/pidfs.c:956 prepare_peercred net/unix/af_unix.c:754 [inline] unix_socketpair+0xdc/0x6f0 net/unix/af_unix.c:1782 __sys_socketpair+0x2bb/0x560 net/socket.c:1763 __do_sys_socketpair net/socket.c:1799 [inline] __se_sys_socketpair net/socket.c:1796 [inline] __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1796 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: 0033:0x7f37bd98e929 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:00007f37be8b2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 00007f37bdbb5fa0 RCX: 00007f37bd98e929 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 00007f37bda10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 00002000000029c0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f37bdbb5fa0 R15: 00007ffd17744a18 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6638 Comm: syz.8.161 Not tainted 6.15.0-syzkaller-gc11f34e30088 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:strlen+0x2e/0x70 lib/string.c:420 Code: 41 57 41 56 41 54 53 48 c7 c0 ff ff ff ff 49 be 00 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 <84> c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 75 de eb 19 89 RSP: 0018:ffffc900000069d8 EFLAGS: 00000807 RAX: 0000000000000000 RBX: ffffffff8b8bd565 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8e13f060 RDI: ffffffff8b8bd560 RBP: ffffc90000006b00 R08: 0000000000000002 R09: 0000000000000000 R10: 3e2d735f5f5f5f26 R11: 746e756f63716573 R12: 1ffff92000000d48 R13: ffffffff8e13f060 R14: dffffc0000000000 R15: 0000000000000004 FS: 0000000000000000(0000) GS:ffff888125c54000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555589d25c8 CR3: 000000000df38000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __fortify_strlen include/linux/fortify-string.h:268 [inline] trace_event_get_offsets_lock_acquire include/trace/events/lock.h:24 [inline] do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0xcb/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] trace_call_bpf+0xd4/0x850 kernel/trace/bpf_trace.c:-1 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 seqcount_lockdep_reader_access+0xc9/0x1c0 include/linux/seqlock.h:72 ktime_get+0x3e/0x1f0 kernel/time/timekeeping.c:776 clockevents_program_event+0xea/0x360 kernel/time/clockevents.c:326 hrtimer_interrupt+0x620/0xaa0 kernel/time/hrtimer.c:1900 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:perf_trace_lock_acquire+0x251/0x410 include/trace/events/lock.h:24 Code: 88 00 00 00 10 00 49 81 c4 90 00 00 00 4c 89 e0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 e7 e8 06 ab 86 00 41 81 c5 18 00 01 00 <48> 89 da 49 c7 04 24 00 00 00 00 48 8d 7b 0c 48 89 f8 48 c1 e8 03 RSP: 0018:ffffc90000007220 EFLAGS: 00000206 RAX: 1ffff110170c6553 RBX: ffffe8ffffcf9000 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880b8632a90 RBP: ffffc90000007318 R08: 0000000000000004 R09: 0000000000000004 R10: ffffe8ffffcf9024 R11: fffff91ffff9f206 R12: ffff8880b8632a98 R13: 00000000000e0018 R14: 000000000000002c R15: dffffc0000000000 __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 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 skb_copy+0x188/0x800 net/core/skbuff.c:2125 mac80211_hwsim_tx_frame_no_nl+0xcd3/0x11c0 drivers/net/wireless/virtual/mac80211_hwsim.c:1871 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2222 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:lru_gen_inc_refs mm/swap.c:398 [inline] RIP: 0010:folio_mark_accessed+0x42c/0x8b0 mm/swap.c:454 Code: 48 8b 05 77 eb a0 10 48 3b 84 24 80 00 00 00 75 25 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 da 04 6d 09 cc e8 84 8c c4 ff b4 e8 7d 8c c4 ff e9 85 fe ff ff e8 03 33 6a 09 e8 6e 8c c4 ff RSP: 0018:ffffc900034472c0 EFLAGS: 00000293 RAX: ffffffff81fbd4cc RBX: ffffea0001d36000 RCX: ffff8880277c8000 RDX: 0000000000000000 RSI: 0000000000000200 RDI: 0000000000000000 RBP: ffffc90003447390 R08: ffffea0001d36007 R09: 1ffffd40003a6c00 R10: dffffc0000000000 R11: fffff940003a6c01 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000200 R15: 1ffff92000688e5c zap_present_folio_ptes mm/memory.c:1514 [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+0x1c69/0x41c0 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: 0033:0x7fbf9298d290 Code: Unable to access opcode bytes at 0x7fbf9298d266. RSP: 002b:00007fbf937faf10 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: fffffffffffffffe RBX: 0000000000000002 RCX: 00007fbf9298d290 RDX: 0000000000000002 RSI: 00007fbf937fafa0 RDI: 00000000ffffff9c RBP: 00007fbf937fafa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fbf92bb5fa0 R15: 00007ffe8fd9bd58