watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.1.122:6399] Modules linked in: irq event stamp: 13952987 hardirqs last enabled at (13952986): [] irqentry_exit+0x5dd/0x660 kernel/entry/common.c:219 hardirqs last disabled at (13952987): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (10749404): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (10749404): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (10749404): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (10749407): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (10749407): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (10749407): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 6399 Comm: syz.1.122 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:lock_acquire+0x5a/0x340 kernel/locking/lockdep.c:5831 Code: 2c 3a e0 10 48 89 44 24 58 e9 23 02 00 00 65 8b 05 2f 3a e0 10 83 f8 08 0f 83 af 01 00 00 89 c0 48 0f a3 05 58 ab e3 0d 73 0d 21 25 09 00 84 c0 0f 84 d7 01 00 00 83 3d 72 db e3 0d 00 0f 84 RSP: 0018:ffffc900000072f8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffe8ffffc42c60 RDX: 0000000000000000 RSI: ffffffff8bc084c0 RDI: ffffffff8bc08480 RBP: ffffffff81743f85 R08: 0000000000000002 R09: 0000000000000000 R10: ffffc90000006fc8 R11: ffffffff81ada100 R12: 0000000000000002 R13: ffffffff8df41a20 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f7b95b9e6c0(0000) GS:ffff888125e35000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7b92bf4d58 CR3: 000000002910e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] class_rcu_constructor include/linux/rcupdate.h:1195 [inline] unwind_next_frame+0xc2/0x23d0 arch/x86/kernel/unwind_orc.c:495 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:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:339 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:365 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x37d/0x710 mm/slub.c:5270 skb_clone+0x212/0x3a0 net/core/skbuff.c:2087 hsr_forward_do net/hsr/hsr_forward.c:-1 [inline] hsr_forward_skb+0x1013/0x2860 net/hsr/hsr_forward.c:741 send_hsr_supervision_frame+0x731/0xcb0 net/hsr/hsr_device.c:364 hsr_announce+0x1d5/0x360 net/hsr/hsr_device.c:421 call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404 handle_softirqs+0x27d/0x850 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 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:schedule_debug kernel/sched/core.c:5815 [inline] RIP: 0010:__schedule+0x19b/0x5000 kernel/sched/core.c:6740 Code: f6 48 8b 1b 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 ac 7a cb f6 48 81 3b 9d 6e ac 57 <0f> 85 5b 19 00 00 45 85 ed 7f 54 49 8d 5e 18 48 89 d8 48 c1 e8 03 RSP: 0018:ffffc9001a12f700 EFLAGS: 00000246 RAX: 1ffff92003425000 RBX: ffffc9001a128000 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff8bc084c0 RDI: ffffffff8bc08480 RBP: ffffc9001a12f910 R08: ffffffff8f822177 R09: 1ffffffff1f0442e R10: dffffc0000000000 R11: fffffbfff1f0442f R12: ffff888125e35000 R13: 0000000000000001 R14: ffff8880254c3d00 R15: 1ffff110170c7680 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7190 irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:put_cpu_partial+0x234/0x2d0 mm/slub.c:3960 Code: 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 0f 0b 90 e9 e7 fe ff ff e8 19 2b 3e 09 41 f7 c5 00 02 00 00 74 b2 fb 4d 85 ff <75> b1 eb ba e8 03 2b 3e 09 e9 4f fe ff ff 90 0f 0b 90 e9 66 ff ff RSP: 0018:ffffc9001a12fae8 EFLAGS: 00000246 RAX: 3ef02e584974f500 RBX: ffff88813ffa7140 RCX: 3ef02e584974f500 RDX: 0000000000000007 RSI: ffffffff8d792bca RDI: ffffffff8bc084e0 RBP: 0000000000000001 R08: ffffffff8f822177 R09: 1ffffffff1f0442e R10: dffffc0000000000 R11: fffffbfff1f0442f R12: 0000000000000000 R13: 0000000000000286 R14: ffff8880b863f190 R15: 0000000000000000 __slab_free+0x288/0x2a0 mm/slub.c:5952 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:349 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_lru_noprof+0x36c/0x6e0 mm/slub.c:5282 __d_alloc+0x37/0x6f0 fs/dcache.c:1730 d_alloc_pseudo+0x21/0xc0 fs/dcache.c:1861 alloc_path_pseudo fs/file_table.c:363 [inline] alloc_file_pseudo+0xcc/0x210 fs/file_table.c:379 sock_alloc_file+0xb8/0x2e0 net/socket.c:483 sock_map_fd net/socket.c:513 [inline] __sys_socket+0x13d/0x1b0 net/socket.c:1756 __do_sys_socket net/socket.c:1761 [inline] __se_sys_socket net/socket.c:1759 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1759 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7b94d8f749 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:00007f7b95b9e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f7b94fe5fa0 RCX: 00007f7b94d8f749 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000010 RBP: 00007f7b94e13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7b94fe6038 R14: 00007f7b94fe5fa0 R15: 00007ffeb628be68 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1301 Comm: aoe_tx0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:vsnprintf+0xa9e/0xee0 lib/vsprintf.c:2886 Code: 68 d0 f6 eb bf e8 a2 00 6a f6 49 ff c7 4d 89 fd eb 0d e8 95 00 6a f6 4d 89 fd 4c 8b 74 24 08 48 89 e8 48 c1 e8 03 0f b6 04 18 <84> c0 75 53 80 7d 00 00 0f 84 0e 03 00 00 e8 6f 00 6a f6 49 89 ef RSP: 0018:ffffc900046deaf0 EFLAGS: 00000a02 RAX: 0000000000000006 RBX: dffffc0000000000 RCX: 000000000000005b RDX: 0000000000000000 RSI: ffffffff8b6bb900 RDI: ffffc900046dedce RBP: ffffffff8b6bb901 R08: ffffc900046dedce R09: 1ffff920008dbdb9 R10: dffffc0000000000 R11: fffff520008dbdba R12: ffffc900046debe0 R13: ffffc900046dedcf R14: 0000000000000000 R15: ffffffff8b6bb900 FS: 0000000000000000(0000) GS:ffff888125f35000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2665e2b6c8 CR3: 0000000011ab4000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: sprintf+0xd9/0x120 lib/vsprintf.c:3110 print_caller kernel/printk/printk.c:1368 [inline] info_print_prefix+0x1f3/0x310 kernel/printk/printk.c:1385 record_print_text+0x154/0x420 kernel/printk/printk.c:1432 printk_get_next_message+0x26d/0x7b0 kernel/printk/printk.c:3018 console_emit_next_record kernel/printk/printk.c:3083 [inline] console_flush_one_record kernel/printk/printk.c:3215 [inline] console_flush_all+0x514/0xb60 kernel/printk/printk.c:3289 __console_flush_and_unlock kernel/printk/printk.c:3319 [inline] console_unlock+0xbb/0x190 kernel/printk/printk.c:3359 vprintk_emit+0x4f8/0x5f0 kernel/printk/printk.c:2426 dev_vprintk_emit+0x337/0x3f0 drivers/base/core.c:4914 dev_printk_emit+0xe0/0x130 drivers/base/core.c:4925 __netdev_printk+0x3e1/0x480 net/core/dev.c:12901 netdev_warn+0x10a/0x160 net/core/dev.c:12954 ieee802154_subif_start_xmit+0x136/0x190 net/mac802154/tx.c:232 __netdev_start_xmit include/linux/netdevice.h:5273 [inline] netdev_start_xmit include/linux/netdevice.h:5282 [inline] xmit_one net/core/dev.c:3853 [inline] dev_hard_start_xmit+0x2cd/0x800 net/core/dev.c:3869 sch_direct_xmit+0x241/0x4b0 net/sched/sch_generic.c:347 __dev_xmit_skb net/core/dev.c:4169 [inline] __dev_queue_xmit+0x136f/0x3140 net/core/dev.c:4783 dev_queue_xmit include/linux/netdevice.h:3381 [inline] tx+0x6b/0x190 drivers/block/aoe/aoenet.c:62 kthread+0x1d0/0x3e0 drivers/block/aoe/aoecmd.c:1241 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246