watchdog: BUG: soft lockup - CPU#0 stuck for 142s! [syz.6.3052:19401] Modules linked in: irq event stamp: 17773429 hardirqs last enabled at (17773428): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (17773429): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (17701268): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (17701268): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (17701268): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (17701271): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (17701271): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (17701271): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 19401 Comm: syz.6.3052 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:alloc_from_pcs mm/slub.c:4714 [inline] RIP: 0010:slab_alloc_node mm/slub.c:4854 [inline] RIP: 0010:kmem_cache_alloc_node_noprof+0x1b7/0x690 mm/slub.c:4921 Code: 00 00 00 e8 1b ef 6f ff 4d 8b 26 e8 d3 11 8a 09 41 89 c7 83 f8 08 0f 83 c0 03 00 00 4e 8b 3c fd 90 d7 1a 8e 43 80 7c 27 30 00 <74> 76 bf 01 00 00 00 e8 8d f0 6f ff 65 8b 05 36 d5 f7 10 85 c0 0f RSP: 0018:ffffc90000007a68 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000000000103 RDX: 0000000000000000 RSI: ffffffff8c27b3e0 RDI: ffffffff8c27b3a0 RBP: 0000000000000820 R08: ffffffff90118db7 R09: 1ffffffff20231b6 R10: dffffc0000000000 R11: fffffbfff20231b7 R12: ffffffff931e00b0 R13: 00000000ffffffff R14: ffff88801ee868c0 R15: ffff888125463000 FS: 00007f55323d16c0(0000) GS:ffff888125463000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff99d67f52 CR3: 0000000020f5e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __alloc_skb+0x1d0/0x7d0 net/core/skbuff.c:702 alloc_skb include/linux/skbuff.h:1383 [inline] ndisc_alloc_skb+0x9f/0x480 net/ipv6/ndisc.c:420 ndisc_send_rs+0x2b5/0x630 net/ipv6/ndisc.c:706 addrconf_rs_timer+0x395/0x6d0 net/ipv6/addrconf.c:4041 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:perf_swevent_event+0x734/0x7e0 kernel/events/core.c:10907 Code: 4d 85 e4 75 16 e8 fc 71 cc ff eb 15 e8 f5 71 cc ff e8 d0 c6 b4 09 4d 85 e4 74 ea e8 e6 71 cc ff fb 48 c7 44 24 40 0e 36 e0 45 <4a> c7 04 2b 00 00 00 00 65 48 8b 05 3c a4 22 11 48 3b 84 24 80 00 RSP: 0018:ffffc90002ef6ba0 EFLAGS: 00000293 RAX: ffffffff81f92bca RBX: 1ffff920005ded7c RCX: ffff888026e65b80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90002ef6c70 R08: ffffffff90118db7 R09: 1ffffffff20231b6 R10: dffffc0000000000 R11: fffffbfff20231b7 R12: 0000000000000200 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880515fc518 perf_tp_event+0x608/0x2a90 kernel/events/core.c:11418 perf_trace_run_bpf_submit+0xee/0x170 kernel/events/core.c:11337 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] class_rcu_constructor include/linux/rcupdate.h:1193 [inline] is_module_text_address+0x39/0x1e0 kernel/module/main.c:3857 kernel_text_address+0x94/0xe0 kernel/extable.c:119 __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+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 context_switch kernel/sched/core.c:5298 [inline] __schedule+0x15e5/0x52d0 kernel/sched/core.c:6908 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7092 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12 mnt_get_write_access+0x234/0x280 fs/namespace.c:474 file_get_write_access fs/open.c:870 [inline] do_dentry_open+0x8b7/0x14e0 fs/open.c:910 vfs_open+0x3b/0x340 fs/open.c:1081 do_open fs/namei.c:4671 [inline] path_openat+0x2e08/0x3860 fs/namei.c:4830 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: 0033:0x7f553159c799 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:00007f55323d1028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f5531815fa0 RCX: 00007f553159c799 RDX: 00000000000026e1 RSI: 00002000000002c0 RDI: ffffffffffffff9c RBP: 00007f5531632c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5531816038 R14: 00007f5531815fa0 R15: 00007fffd4b8de18 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1299 Comm: aoe_tx0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:__srcu_check_read_flavor+0x129/0x250 kernel/rcu/srcutree.c:809 Code: 89 e7 be 04 00 00 00 e8 15 c3 85 00 31 c0 f0 41 0f b1 1c 24 85 c0 74 04 39 d8 75 27 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d d2 a2 06 0a cc 90 0f 0b 90 e9 06 ff ff ff 90 0f 0b 90 85 c0 75 RSP: 0018:ffffc90000a08b58 EFLAGS: 00000086 RAX: 0000000000000004 RBX: ffffffff931c6150 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8e7bd200 RBP: 0000000000000000 R08: 0000000000000002 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffffff81981d20 R12: 0000000000000002 R13: ffffffff8e75e3e0 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888125563000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f5777444b0 CR3: 00000000839d8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: srcu_check_read_flavor include/linux/srcutree.h:373 [inline] srcu_read_unlock_fast_notrace include/linux/srcu.h:530 [inline] class_srcu_fast_notrace_destructor include/linux/srcu.h:634 [inline] __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x2cc/0x2e0 kernel/locking/lockdep.c:5831 rcu_lock_acquire include/linux/rcupdate.h:312 [inline] rcu_read_lock include/linux/rcupdate.h:850 [inline] select_task_rq_fair+0x372/0x4320 kernel/sched/fair.c:8615 select_task_rq kernel/sched/core.c:3521 [inline] try_to_wake_up+0x4db/0x1390 kernel/sched/core.c:4230 hrtimer_wakeup+0x4e/0x60 kernel/time/hrtimer.c:2021 __run_hrtimer kernel/time/hrtimer.c:1785 [inline] __hrtimer_run_queues+0x53a/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+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2039 [inline] RIP: 0010:vprintk_emit+0x45d/0x560 kernel/printk/printk.c:2478 Code: 0f 84 44 ff ff ff e8 42 2d 21 00 fb eb 44 e8 3a 2d 21 00 e8 15 82 09 0a 4d 85 f6 74 94 e8 2b 2d 21 00 fb 48 c7 c7 20 08 75 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 cb 16 RSP: 0018:ffffc9000590f3a0 EFLAGS: 00000293 RAX: ffffffff81a47085 RBX: ffffffff81a46eff RCX: ffff888028be8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e750820 RBP: ffffc9000590f450 R08: ffffffff90118db7 R09: 1ffffffff20231b6 R10: dffffc0000000000 R11: fffffbfff20231b7 R12: 0000000000000000 R13: 000000000000002d R14: 0000000000000200 R15: 1ffff92000b21e78 dev_vprintk_emit+0x355/0x420 drivers/base/core.c:4913 dev_printk_emit+0xee/0x140 drivers/base/core.c:4924 __netdev_printk+0x3e1/0x480 net/core/dev.c:12934 netdev_warn+0x11e/0x180 net/core/dev.c:12987 ieee802154_subif_start_xmit+0x136/0x190 net/mac802154/tx.c:232 __netdev_start_xmit include/linux/netdevice.h:5292 [inline] netdev_start_xmit include/linux/netdevice.h:5301 [inline] xmit_one net/core/dev.c:3871 [inline] dev_hard_start_xmit+0x2d8/0x870 net/core/dev.c:3887 sch_direct_xmit+0x251/0x4c0 net/sched/sch_generic.c:347 __dev_xmit_skb net/core/dev.c:4186 [inline] __dev_queue_xmit+0x1550/0x3890 net/core/dev.c:4802 dev_queue_xmit include/linux/netdevice.h:3384 [inline] tx+0x6b/0x190 drivers/block/aoe/aoenet.c:62 kthread+0x1e0/0x3f0 drivers/block/aoe/aoecmd.c:1241 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245