watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.1.44:6091] Modules linked in: irq event stamp: 6492067 hardirqs last enabled at (6492066): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (6492067): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (5572578): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (5572578): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (5572578): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (5572581): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (5572581): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (5572581): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 6091 Comm: syz.1.44 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:unwind_next_frame+0x70c/0x23c0 arch/x86/kernel/unwind_orc.c:527 Code: f0 48 c1 e8 03 48 89 44 24 40 0f b6 04 28 84 c0 48 89 54 24 08 48 89 34 24 0f 85 3d 16 00 00 4c 89 e0 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 53 16 00 00 0f b7 1e c1 eb 0b 80 e3 01 48 8b 44 24 28 RSP: 0018:ffffc900000074b8 EFLAGS: 00000a07 RAX: 0000000000000000 RBX: ffffffff902cfd48 RCX: ffffffff902cfd4c RDX: ffffffff90aaa6c2 RSI: ffffffff90aaa6c6 RDI: ffffffff8c27a820 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8e7602e0 R10: dffffc0000000000 R11: fffff91ffff94005 R12: ffffffff90aaa6c7 R13: ffffc900000075d8 R14: ffffc90000007588 R15: ffffffff81767a45 FS: 00007f4d8c7726c0(0000) GS:ffff888125467000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30b08ff8 CR3: 000000005d8b2000 CR4: 00000000003526f0 Call Trace: 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 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_mempool_unpoison_object+0x9f/0x130 mm/kasan/common.c:564 kasan_mempool_unpoison_object include/linux/kasan.h:391 [inline] napi_skb_cache_get+0x3c8/0x780 net/core/skbuff.c:306 __alloc_skb+0x19a/0x7d0 net/core/skbuff.c:696 skb_copy+0x188/0x800 net/core/skbuff.c:2195 mac80211_hwsim_tx_frame_no_nl+0xd00/0x11f0 drivers/net/wireless/virtual/mac80211_hwsim.c:1891 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2264 mac80211_hwsim_beacon_tx+0x3e8/0x870 drivers/net/wireless/virtual/mac80211_hwsim.c:2365 __iterate_interfaces+0x2ab/0x590 net/mac80211/util.c:760 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:796 mac80211_hwsim_beacon+0xbb/0x180 drivers/net/wireless/virtual/mac80211_hwsim.c:2395 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x53a/0xcc0 kernel/time/hrtimer.c:1849 hrtimer_run_softirq+0x182/0x5a0 kernel/time/hrtimer.c:1866 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__rcu_read_unlock+0x38/0xe0 kernel/rcu/tree_plugin.h:435 Code: bf 00 00 00 00 00 fc ff df 65 48 8b 3d e9 37 70 11 48 8d 9f 84 04 00 00 49 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 4f ff 0b <75> 1d 4c 8d b7 88 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 RSP: 0018:ffffc90004b4e250 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff8880305ec104 RCX: 0000000000000001 RDX: 0000000000000006 RSI: ffffffff8e16299c RDI: ffff8880305ebc80 RBP: ffffc90004b4e398 R08: ffffc90004b4e32f R09: 0000000000000000 R10: ffffc90004b4e320 R11: ffffffffa0201a50 R12: 1ffff110060bd820 R13: dffffc0000000000 R14: 1ffff92000969c60 R15: dffffc0000000000 rcu_read_unlock include/linux/rcupdate.h:883 [inline] trace_call_bpf+0x7c4/0xb70 kernel/trace/bpf_trace.c:147 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11301 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x345/0x440 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+0x2a4/0x2e0 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] is_bpf_text_address+0x47/0x2b0 kernel/bpf/core.c:748 kernel_text_address+0xa5/0xe0 kernel/extable.c:125 __kernel_text_address+0xd/0x30 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385 arch_stack_walk+0xfb/0x150 arch/x86/kernel/stacktrace.c:26 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] __kmalloc_cache_noprof+0x31c/0x660 mm/slub.c:5339 kmalloc_noprof include/linux/slab.h:962 [inline] alloc_work_entries+0xc7/0x370 drivers/infiniband/core/iwcm.c:174 iw_cm_listen+0x42/0x230 drivers/infiniband/core/iwcm.c:571 cma_iw_listen drivers/infiniband/core/cma.c:2694 [inline] rdma_listen+0x911/0xd50 drivers/infiniband/core/cma.c:3982 cma_listen_on_dev+0x3f5/0x720 drivers/infiniband/core/cma.c:2753 cma_add_one+0x647/0xa70 drivers/infiniband/core/cma.c:5413 add_client_context+0x37c/0x7a0 drivers/infiniband/core/device.c:729 enable_device_and_get+0x19c/0x3e0 drivers/infiniband/core/device.c:1339 ib_register_device+0x110f/0x13e0 drivers/infiniband/core/device.c:1458 siw_device_register drivers/infiniband/sw/siw/siw_main.c:71 [inline] siw_newlink+0x8fe/0xde0 drivers/infiniband/sw/siw/siw_main.c:430 nldev_newlink+0x5bd/0x650 drivers/infiniband/core/nldev.c:1797 rdma_nl_rcv_msg drivers/infiniband/core/netlink.c:-1 [inline] rdma_nl_rcv_skb drivers/infiniband/core/netlink.c:239 [inline] rdma_nl_rcv+0x6d7/0xa10 drivers/infiniband/core/netlink.c:259 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x80f/0x9b0 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1894 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xa68/0xad0 net/socket.c:2592 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2681 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: 0033:0x7f4d8b99c629 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:00007f4d8c772028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f4d8bc15fa0 RCX: 00007f4d8b99c629 RDX: 0000000020000000 RSI: 00002000000002c0 RDI: 000000000000000d RBP: 00007f4d8ba32b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4d8bc16038 R14: 00007f4d8bc15fa0 R15: 00007ffdfa1380a8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6092 Comm: syz.3.43 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:__perf_output_begin kernel/events/ring_buffer.c:171 [inline] RIP: 0010:perf_output_begin_forward+0x191/0xab0 kernel/events/ring_buffer.c:277 Code: 00 00 00 ba 18 00 00 00 48 8d bc 24 e0 00 00 00 31 f6 e8 92 00 33 00 48 8d bb 08 03 00 00 48 89 f8 48 c1 e8 03 42 80 3c 28 00 <74> 05 e8 a8 fd 32 00 4c 8b b3 08 03 00 00 4d 85 f6 4c 0f 44 f3 49 RSP: 0018:ffffc90000a07f00 EFLAGS: 00000046 RAX: 1ffff110477c5da8 RBX: ffff88823be2ea38 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88823be2ed40 RBP: ffffc90000a08070 R08: ffffc90000a07ff7 R09: 0000000000000000 R10: ffffc90000a07fe0 R11: fffff52000140fff R12: ffffc90000a080c0 R13: dffffc0000000000 R14: 0000000000000001 R15: 1ffff92000140ff0 FS: 00007f5c99aa86c0(0000) GS:ffff888125567000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffec01720d0 CR3: 00000000424ea000 CR4: 00000000003526f0 Call Trace: __perf_event_output kernel/events/core.c:8808 [inline] perf_event_output_forward+0x2d4/0x480 kernel/events/core.c:8826 __perf_event_overflow+0x87a/0xec0 kernel/events/core.c:10762 perf_swevent_hrtimer+0x3e0/0x590 kernel/events/core.c:12157 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x4e7/0xcc0 kernel/time/hrtimer.c:1849 hrtimer_interrupt+0x42b/0x1010 kernel/time/hrtimer.c:1911 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:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:430 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x65e/0xbc0 kernel/locking/qspinlock.c:325 Code: 24 48 0f b6 04 01 84 c0 75 6f 48 8b 44 24 10 80 38 00 74 1d 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 28 c6 44 01 06 f8 f3 90 <41> ff c4 75 bf eb 68 4c 8b 7c 24 10 4c 89 ff be 02 00 00 00 e8 d9 RSP: 0018:ffffc90000a08880 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: ffffc90000a08920 RCX: 1ffff9200014111c RDX: 0000000000000100 RSI: ffffffff8def2270 RDI: ffff8880b873bcc0 RBP: ffffc90000a08990 R08: ffffffff90117db7 R09: 1ffffffff2022fb6 R10: dffffc0000000000 R11: fffffbfff2022fb7 R12: 00000000ffffe3d6 R13: 0000000000000000 R14: 1ffffffff1e808e4 R15: ffff8880b873bcd4 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:35 [inline] queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:66 [inline] queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock+0x26c/0x2f0 kernel/locking/spinlock_debug.c:116 spin_lock include/linux/spinlock.h:341 [inline] mac80211_hwsim_tx_frame_no_nl+0x73a/0x11f0 drivers/net/wireless/virtual/mac80211_hwsim.c:1842 mac80211_hwsim_tx_frame+0x1b5/0x200 drivers/net/wireless/virtual/mac80211_hwsim.c:2264 mac80211_hwsim_beacon_tx+0x3e8/0x870 drivers/net/wireless/virtual/mac80211_hwsim.c:2365 __iterate_interfaces+0x2ab/0x590 net/mac80211/util.c:760 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180 net/mac80211/util.c:796 mac80211_hwsim_beacon+0xbb/0x180 drivers/net/wireless/virtual/mac80211_hwsim.c:2395 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x53a/0xcc0 kernel/time/hrtimer.c:1849 hrtimer_run_softirq+0x182/0x5a0 kernel/time/hrtimer.c:1866 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:bpf_prog_16cc958f3ed161db+0xd/0x26 Code: cc cc cc cc cc cc cc cc cc 40 00 00 00 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc f3 0f 1e fa 0f 1f 44 00 00 0f 1f 00 55 <48> 89 e5 f3 0f 1e fa 41 56 45 31 f6 b8 e5 02 00 00 41 5e c9 e9 a6 RSP: 0018:ffffc9000499ef70 EFLAGS: 00000286 RAX: 1ffff920008d2609 RBX: ffff88802168e698 RCX: dffffc0000000000 RDX: ffffc9000d0d2000 RSI: ffffc90004693060 RDI: ffffe8ffffd9c0e0 RBP: ffffc9000499f098 R08: ffffc9000499f02f R09: 0000000000000000 R10: ffffc9000499f020 R11: ffffffffa0203354 R12: ffff88802168e6a8 R13: ffffc90004693048 R14: 0000000000000001 R15: ffffc90004693060 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11301 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 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:5219 [inline] __kmalloc_node_noprof+0x4e0/0x7c0 mm/slub.c:5225 kmalloc_node_noprof include/linux/slab.h:1093 [inline] alloc_slab_obj_exts+0x4b/0x1b0 mm/slub.c:2174 __memcg_slab_post_alloc_hook+0x53c/0xa80 mm/memcontrol.c:3234 memcg_slab_post_alloc_hook mm/slub.c:2459 [inline] slab_post_alloc_hook mm/slub.c:4512 [inline] slab_alloc_node mm/slub.c:4830 [inline] __do_kmalloc_node mm/slub.c:5218 [inline] __kmalloc_node_track_caller_noprof+0x539/0x7b0 mm/slub.c:5327 kmemdup_noprof+0x2b/0x70 mm/util.c:138 kmemdup_noprof include/linux/fortify-string.h:763 [inline] __addrconf_sysctl_register+0xa7/0x4d0 net/ipv6/addrconf.c:7309 addrconf_sysctl_register+0x168/0x1c0 net/ipv6/addrconf.c:7375 ipv6_add_dev+0xd26/0x13a0 net/ipv6/addrconf.c:459 addrconf_notify+0x771/0x1050 net/ipv6/addrconf.c:3654 notifier_call_chain+0x1be/0x400 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline] call_netdevice_notifiers net/core/dev.c:2301 [inline] register_netdevice+0x173a/0x1cf0 net/core/dev.c:11449 tun_set_iff+0x844/0xf00 drivers/net/tun.c:2807 __tun_chr_ioctl+0x7bb/0x1e10 drivers/net/tun.c:3088 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 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: 0033:0x7f5c98b9c629 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:00007f5c99aa8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5c98e15fa0 RCX: 00007f5c98b9c629 RDX: 0000200000000080 RSI: 00000000400454ca RDI: 0000000000000009 RBP: 00007f5c98c32b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5c98e16038 R14: 00007f5c98e15fa0 R15: 00007ffef2e8c858