watchdog: BUG: soft lockup - CPU#0 stuck for 121s! [syz.5.561:7753] Modules linked in: irq event stamp: 10665071 hardirqs last enabled at (10665070): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (10665071): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (10664908): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (10664908): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (10664908): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (10664911): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (10664911): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (10664911): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 7753 Comm: syz.5.561 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194 Code: 74 05 e8 8b e1 6e f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 73 63 38 f6 65 8b 05 5c e5 1c 07 85 c0 74 40 48 c7 04 24 0e 36 RSP: 0000:ffffc90000007a40 EFLAGS: 00000206 RAX: 05f830b9265f2b00 RBX: 0000000000000a06 RCX: 05f830b9265f2b00 RDX: 0000000000000002 RSI: ffffffff8d749f78 RDI: 0000000000000001 RBP: ffffc90000007ac0 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff8880b8825540 R15: 1ffff92000000f48 FS: 00007fe7485ce6c0(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f73d411b060 CR3: 000000006a140000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __mod_timer+0xb37/0xf30 kernel/time/timer.c:1181 mrp_join_timer_arm net/802/mrp.c:597 [inline] mrp_join_timer+0x13f/0x170 net/802/mrp.c:612 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 handle_softirqs+0x283/0x870 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:finish_task_switch+0x26b/0x950 kernel/sched/core.c:5250 Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 ff 83 c6 09 e8 6a 66 35 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0000:ffffc9000539f798 EFLAGS: 00000282 RAX: 05f830b9265f2b00 RBX: 0000000000000000 RCX: 05f830b9265f2b00 RDX: 0000000000000007 RSI: ffffffff8d749f78 RDI: ffffffff8bc1cde0 RBP: ffffc9000539f7f0 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: ffff8880342ada00 R13: dffffc0000000000 R14: ffff88802b648000 R15: ffff8880b883a6d8 context_switch kernel/sched/core.c:5385 [inline] __schedule+0x16ea/0x4cd0 kernel/sched/core.c:6767 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7090 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_pc+0x55/0x70 kernel/kcov.c:231 Code: 16 00 00 00 74 2c 8b 91 18 16 00 00 83 fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48 8d 7e 01 8b 89 1c 16 00 00 48 39 cf 73 08 <48> 89 3a 48 89 44 f2 08 c3 cc cc cc cc cc 66 66 66 66 2e 0f 1f 84 RSP: 0018:ffffc9000539fb98 EFLAGS: 00000287 RAX: ffffffff81731b89 RBX: 0000000068d3b300 RCX: 0000000000080000 RDX: ffffc900042b1000 RSI: 000000000004978a RDI: 000000000004978b RBP: 0000000000000000 R08: 000000000000001d R09: ffff88802f3c2b00 R10: 0000000000000000 R11: fffffbfff1efda6f R12: 0000000000000000 R13: ffffea0000000000 R14: 000000000000002e R15: ffff888068d3b300 phys_addr_valid arch/x86/mm/physaddr.h:7 [inline] __phys_addr+0x99/0x170 arch/x86/mm/physaddr.c:28 virt_to_folio include/linux/mm.h:1402 [inline] virt_to_slab mm/slab.h:211 [inline] qlink_to_cache mm/kasan/quarantine.c:131 [inline] qlist_free_all+0x3d/0x140 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:385 kasan_kmalloc include/linux/kasan.h:260 [inline] __kmalloc_cache_noprof+0x230/0x3d0 mm/slub.c:4372 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] alloc_netdev_mqs+0xc36/0x11e0 net/core/dev.c:11692 tun_set_iff+0x532/0xef0 drivers/net/tun.c:2752 __tun_chr_ioctl+0x788/0x1d90 drivers/net/tun.c:3048 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe74778e969 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:00007fe7485ce038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fe7479b5fa0 RCX: 00007fe74778e969 RDX: 0000200000000500 RSI: 00000000400454ca RDI: 0000000000000010 RBP: 00007fe747810ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe7479b5fa0 R15: 00007ffedc781f18 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7763 Comm: syz.9.565 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:write_comp_data kernel/kcov.c:246 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x20/0x90 kernel/kcov.c:300 Code: 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 14 25 08 40 75 92 65 8b 0d 48 7e b5 10 81 e1 00 01 ff 00 74 11 <81> f9 00 01 00 00 75 5b 83 ba 3c 16 00 00 00 74 52 8b 8a 18 16 00 RSP: 0000:ffffc90000a07d48 EFLAGS: 00000206 RAX: ffffffff81ef52fd RBX: 0000000000000001 RCX: 0000000000000100 RDX: ffff888064f18000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000 R10: ffffc90000a08098 R11: ffffffff81acaa70 R12: 1ffff1100c9e3285 R13: dffffc0000000000 R14: ffff888064f1942d R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efdaae9e020 CR3: 000000000dd36000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: get_recursion_context kernel/events/internal.h:217 [inline] perf_swevent_get_recursion_context+0x9d/0x100 kernel/events/core.c:10474 perf_trace_buf_alloc+0x59/0x2a0 kernel/trace/trace_event_perf.c:410 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x196/0x410 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:5829 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 save_stack+0xf7/0x1f0 mm/page_owner.c:156 __set_page_owner+0x8d/0x4a0 mm/page_owner.c:329 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1718 prep_new_page mm/page_alloc.c:1726 [inline] get_page_from_freelist+0x21ce/0x22b0 mm/page_alloc.c:3688 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4970 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2301 alloc_slab_page mm/slub.c:2468 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2632 new_slab mm/slub.c:2686 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3872 __slab_alloc mm/slub.c:3962 [inline] __slab_alloc_node mm/slub.c:4037 [inline] slab_alloc_node mm/slub.c:4198 [inline] kmem_cache_alloc_node_noprof+0x280/0x3c0 mm/slub.c:4262 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:577 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:668 __netdev_alloc_skb+0x108/0x970 net/core/skbuff.c:732 netdev_alloc_skb include/linux/skbuff.h:3413 [inline] dev_alloc_skb include/linux/skbuff.h:3426 [inline] __ieee80211_beacon_get+0xe32/0x1630 net/mac80211/tx.c:5475 ieee80211_beacon_get_tim+0xb4/0x2b0 net/mac80211/tx.c:5597 ieee80211_beacon_get include/net/mac80211.h:5648 [inline] mac80211_hwsim_beacon_tx+0x3d2/0x860 drivers/net/wireless/virtual/mac80211_hwsim.c:2313 __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:2347 __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+0x283/0x870 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: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:zap_present_folio_ptes mm/memory.c:-1 [inline] RIP: 0010:zap_present_ptes mm/memory.c:1586 [inline] RIP: 0010:do_zap_pte_range mm/memory.c:1687 [inline] RIP: 0010:zap_pte_range mm/memory.c:1731 [inline] RIP: 0010:zap_pmd_range mm/memory.c:1823 [inline] RIP: 0010:zap_pud_range mm/memory.c:1852 [inline] RIP: 0010:zap_p4d_range mm/memory.c:1873 [inline] RIP: 0010:unmap_page_range+0x16f1/0x4210 mm/memory.c:1894 Code: 8b 7c 24 30 42 80 3c 2b 00 0f 85 df fe ff ff e9 e2 fe ff ff e8 60 09 b7 ff b8 01 00 00 00 ff 8c 84 e0 01 00 00 48 8b 7c 24 78 <48> 8b 74 24 40 e8 b5 5f 6a ff 48 8b 44 24 48 48 89 c3 48 c1 eb 03 RSP: 0000:ffffc900051cf420 EFLAGS: 00000282 RAX: ffffffff8208b4e7 RBX: 0000000000000000 RCX: ffff888064f18000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888031372b40 RBP: ffffc900051cf6b0 R08: ffffea0001bae3c7 R09: 1ffffd4000375c78 R10: dffffc0000000000 R11: fffff94000375c79 R12: ffffea0001bae3c0 R13: dffffc0000000000 R14: ffffea0001bae3d8 R15: 0400000000000000 unmap_vmas+0x25d/0x3c0 mm/memory.c:1984 exit_mmap+0x245/0xba0 mm/mmap.c:1284 __mmput+0x118/0x420 kernel/fork.c:1379 exit_mm+0x1da/0x2c0 kernel/exit.c:589 do_exit+0x859/0x2550 kernel/exit.c:940 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 get_signal+0x125e/0x1310 kernel/signal.c:3034 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcc4db8e969 Code: Unable to access opcode bytes at 0x7fcc4db8e93f. RSP: 002b:00007fcc4ea63038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 0000000000033fe0 RBX: 00007fcc4ddb5fa0 RCX: 00007fcc4db8e969 RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000049 RBP: 00007fcc4dc10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fcc4ddb5fa0 R15: 00007ffd0decd2e8