watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.1.5415:30655] Modules linked in: irq event stamp: 14217563 hardirqs last enabled at (14217562): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (14217563): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (11913490): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (11913490): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (11913490): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (11913493): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (11913493): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (11913493): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 30655 Comm: syz.1.5415 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+0x4d8/0x23c0 arch/x86/kernel/unwind_orc.c:-1 Code: 83 f8 01 4c 8b 7c 24 50 48 bd 00 00 00 00 00 fc ff df 4c 8b 64 24 20 4c 8b 6c 24 48 0f 84 72 15 00 00 e9 03 02 00 00 49 89 d5 <48> 89 d5 48 89 d8 48 29 e8 48 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 RSP: 0018:ffffc90000a082d8 EFLAGS: 00000246 RAX: ffffffff90aaa7a0 RBX: ffffffff902d0088 RCX: 0000000000000100 RDX: ffffffff902d0088 RSI: ffffffff90aaa79a RDI: ffffffff8c27b2a0 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8e75e3e0 R10: dffffc0000000000 R11: ffffffff81b0bfa0 R12: ffffffff81b1b8b1 R13: ffffffff902d0088 R14: ffffc90000a083a8 R15: 000000000000b1b8 FS: 00007f00cde9d6c0(0000) GS:ffff888125563000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f00cde5aff8 CR3: 000000009d404000 CR4: 00000000003526f0 DR0: 0000200000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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 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:5383 kmalloc_noprof include/linux/slab.h:950 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] ref_tracker_alloc+0x15a/0x4c0 lib/ref_tracker.c:270 __netdev_tracker_alloc include/linux/netdevice.h:4403 [inline] netdev_hold include/linux/netdevice.h:4432 [inline] dst_init+0xd9/0x480 net/core/dst.c:52 dst_alloc+0x12a/0x170 net/core/dst.c:94 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x75/0x440 net/ipv6/route.c:3336 ndisc_send_skb+0x44a/0x1670 net/ipv6/ndisc.c:491 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:preempt_schedule_irq+0x48/0xa0 kernel/sched/core.c:7235 Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 63 c5 e4 f5 e8 1e 60 1e f6 fb bf 01 00 00 00 c3 a6 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 f4 61 1e f6 bf 01 RSP: 0018:ffffc90003c46ec0 EFLAGS: 00000202 RAX: 0000000000b5c913 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000006 RSI: ffffffff8def4ba2 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff90118cb7 R09: 1ffffffff2023196 R10: dffffc0000000000 R11: fffffbfff2023197 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_count kernel/sched/core.c:7157 [inline] RIP: 0010:preempt_schedule_notrace+0x4/0x90 kernel/sched/core.c:7160 Code: 41 5f c3 cc cc cc cc cc 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 f3 0f 1e fa <41> 56 53 65 8b 05 82 ac 6c 07 a9 ff ff ff 7f 75 09 9c 58 a9 00 02 RSP: 0018:ffffc90003c46fe0 EFLAGS: 00000246 RAX: fb10584716af0d00 RBX: ffffe8ffffb02010 RCX: f8f8f8f8f8f8f8f8 RDX: ffffc90025410000 RSI: 0000000000002dbe RDI: 0000000000002dbf RBP: ffffc90003c47030 R08: ffffffff90118cb7 R09: 1ffffffff2023196 R10: dffffc0000000000 R11: fffffbfff2023197 R12: dffffc0000000000 R13: dffffc0000000000 R14: 000000000000002c R15: 1ffff92000788e10 preempt_schedule_notrace_thunk+0x16/0x30 arch/x86/entry/thunk.S:13 class_preempt_notrace_destructor include/linux/preempt.h:469 [inline] perf_trace_lock+0x38b/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] __is_module_percpu_address+0x396/0x3f0 kernel/module/main.c:527 static_obj kernel/locking/lockdep.c:858 [inline] lockdep_init_map_type+0xf3/0x2e0 kernel/locking/lockdep.c:4973 qdisc_lock_init include/net/pkt_sched.h:322 [inline] qdisc_alloc+0x2ec/0x9e0 net/sched/sch_generic.c:958 qdisc_create+0x12c/0xf20 net/sched/sch_api.c:1263 __tc_modify_qdisc net/sched/sch_api.c:1753 [inline] tc_modify_qdisc+0x16f0/0x2290 net/sched/sch_api.c:1817 rtnetlink_rcv_msg+0x77e/0xbe0 net/core/rtnetlink.c:6967 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2550 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+0x972/0x9f0 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: 0033:0x7f00ccf9c799 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:00007f00cde9d028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f00cd215fa0 RCX: 00007f00ccf9c799 RDX: 0000000004000010 RSI: 00002000000007c0 RDI: 0000000000000006 RBP: 00007f00cd032c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f00cd216038 R14: 00007f00cd215fa0 R15: 00007ffedb4c3f38 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 1301 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:check_kcov_mode kernel/kcov.c:194 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x36/0x70 kernel/kcov.c:217 Code: 48 32 56 11 65 8b 15 69 32 56 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 94 16 00 00 00 74 2c 8b 91 70 16 00 00 <83> fa 02 75 21 48 8b 91 78 16 00 00 48 8b 32 48 8d 7e 01 8b 89 74 RSP: 0018:ffffc9000522ebe8 EFLAGS: 00000246 RAX: ffffffff8ba9e428 RBX: 0000000000000055 RCX: ffff888029238000 RDX: 0000000000000000 RSI: 0000000000000055 RDI: 0000000000000011 RBP: ffffffff8bcd8983 R08: ffff888029238000 R09: 0000000000000002 R10: 0000000000000025 R11: 0000000000000000 R12: 1ffffffff179b130 R13: ffffc9000522ec98 R14: 1ffff92000a45d93 R15: ffffffff8bcd8983 FS: 0000000000000000(0000) GS:ffff888125463000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe0cb1f5c88 CR3: 000000007ed00000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: spec_flag lib/vsprintf.c:2640 [inline] format_decode+0x1f8/0xe10 lib/vsprintf.c:2705 vsnprintf+0x102/0xee0 lib/vsprintf.c:2890 snprintf+0xe8/0x140 lib/vsprintf.c:3042 print_caller kernel/printk/printk.c:1368 [inline] info_print_prefix+0x1fd/0x360 kernel/printk/printk.c:1387 record_print_text+0x176/0x450 kernel/printk/printk.c:1434 printk_get_next_message+0x29c/0x880 kernel/printk/printk.c:3072 console_emit_next_record kernel/printk/printk.c:3137 [inline] console_flush_one_record kernel/printk/printk.c:3269 [inline] console_flush_all+0x501/0xb20 kernel/printk/printk.c:3343 __console_flush_and_unlock kernel/printk/printk.c:3373 [inline] console_unlock+0xd1/0x1c0 kernel/printk/printk.c:3413 vprintk_emit+0x485/0x560 kernel/printk/printk.c:2479 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