watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.5.314:7285] Modules linked in: irq event stamp: 16310175 hardirqs last enabled at (16310174): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (16310175): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (14438278): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (14438278): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (14438278): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (14438281): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (14438281): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (14438281): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 7285 Comm: syz.5.314 Not tainted 6.15.0-syzkaller-gcd2e103d57e5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:rcu_read_unlock_special+0x87/0x4c0 kernel/rcu/tree_plugin.h:694 Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 72 54 f4 10 41 f7 c6 00 00 f0 00 74 49 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b RSP: 0000:ffffc900000073a0 EFLAGS: 00000206 RAX: a80cb8fafc396a00 RBX: 1ffff92000000e7c RCX: a80cb8fafc396a00 RDX: 0000000000000002 RSI: ffffffff8d9705ba RDI: ffffffff8be26f40 RBP: ffffc90000007498 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: ffffffff8e142400 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 FS: 00007ffa8fedf6c0(0000) GS:ffff888125c5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f86b31b7bac CR3: 000000007fad6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438 rcu_read_unlock include/linux/rcupdate.h:873 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19ae/0x2390 arch/x86/kernel/unwind_orc.c:680 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:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4147 [inline] slab_alloc_node mm/slub.c:4196 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4248 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:579 __alloc_skb+0x142/0x2d0 net/core/skbuff.c:670 alloc_skb include/linux/skbuff.h:1336 [inline] ndisc_alloc_skb+0x9f/0x480 net/ipv6/ndisc.c:423 ndisc_send_rs+0x2b5/0x630 net/ipv6/ndisc.c:707 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4041 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 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:preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:7104 Code: 24 20 f6 44 24 21 02 74 0c 90 0f 0b 48 f7 03 08 00 00 00 74 64 bf 01 00 00 00 e8 8b 0a 2b f6 e8 d6 1b 62 f6 fb bf 01 00 00 00 1b ab ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24 RSP: 0000:ffffc90003a2fdc0 EFLAGS: 00000282 RAX: a80cb8fafc396a00 RBX: 0000000000000000 RCX: a80cb8fafc396a00 RDX: 0000000000000000 RSI: ffffffff8d9705ba RDI: 0000000000000001 RBP: ffffc90003a2fe70 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000745fb8 irqentry_exit+0x6f/0x90 kernel/entry/common.c:307 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:exit_to_user_mode_loop kernel/entry/common.c:-1 [inline] RIP: 0010:exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline] RIP: 0010:irqentry_exit_to_user_mode+0x51/0x120 kernel/entry/common.c:184 Code: 07 85 c0 0f 85 c3 00 00 00 e8 ab 57 46 f6 65 4c 8b 34 25 08 10 9c 92 49 8b 3e f7 c7 1e 30 02 00 74 53 49 89 ff e8 9f 56 46 f6 <4c> 89 f8 a8 18 74 08 e8 03 11 01 00 4c 89 f8 a9 00 10 00 00 74 0b RSP: 0000:ffffc90003a2ff38 EFLAGS: 00000286 RAX: a80cb8fafc396a00 RBX: ffffc90003a2ff58 RCX: a80cb8fafc396a00 RDX: 0000000000000000 RSI: ffffffff8d9705ba RDI: ffffffff8be26f40 RBP: 0000000000000000 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: 0000000000000000 R13: 0000000000000000 R14: ffff888025a7da00 R15: 000000000000000a asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7ffa8ef8e929 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:00007ffa8fedf038 EFLAGS: 00000246 RAX: 0000000000000009 RBX: 00007ffa8f1b5fa0 RCX: 00007ffa8ef8e929 RDX: affffff7ffffffff RSI: 0000000000000000 RDI: 0000200000000180 RBP: 00007ffa8f010b39 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffa8f1b5fa0 R15: 00007fff513f0e48 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1299 Comm: aoe_tx0 Not tainted 6.15.0-syzkaller-gcd2e103d57e5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__handle_irq_event_percpu+0x167/0x980 kernel/irq/handle.c:154 Code: ff e8 dd c3 1d 00 b8 00 00 01 00 21 c3 75 39 49 8d 5c 24 3c 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 f1 04 00 00 8b 1b 00 24 01 00 21 de 31 ff e8 ab c3 1d 00 b8 00 24 01 00 21 c3 74 RSP: 0018:ffffc90000a08de0 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000200000 RCX: 0000000000010000 RDX: ffff888027f10000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a08ef8 R08: ffff8880264618ab R09: 1ffff11004c8c315 R10: dffffc0000000000 R11: ffffed1004c8c316 R12: ffff88802640a000 R13: dffffc0000000000 R14: ffff888026461918 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125d5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6d1a550000 CR3: 0000000031688000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0x8b/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x267/0x9c0 kernel/irq/chip.c:789 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq arch/x86/kernel/irq.c:254 [inline] call_irq_handler arch/x86/kernel/irq.c:266 [inline] __common_interrupt+0x140/0x250 arch/x86/kernel/irq.c:292 common_interrupt+0xb6/0xe0 arch/x86/kernel/irq.c:285 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline] RIP: 0010:vprintk_emit+0x58f/0x7a0 kernel/printk/printk.c:2449 Code: 85 32 01 00 00 e8 a1 60 1f 00 41 89 df 4d 85 f6 48 8b 1c 24 75 07 e8 90 60 1f 00 eb 06 e8 89 60 1f 00 fb 48 c7 c7 20 12 13 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 b9 36 RSP: 0018:ffffc9000461f260 EFLAGS: 00000293 RAX: ffffffff81a0da57 RBX: ffffffff81a0d914 RCX: ffff888027f10000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e131220 RBP: ffffc9000461f370 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: dffffc0000000000 R13: 1ffff920008c3e50 R14: 0000000000000200 R15: 000000000000002d dev_vprintk_emit+0x337/0x3f0 drivers/base/core.c:4917 dev_printk_emit+0xe0/0x130 drivers/base/core.c:4928 __netdev_printk+0x3d7/0x4d0 net/core/dev.c:12508 netdev_warn+0x10a/0x160 net/core/dev.c:12561 ieee802154_subif_start_xmit+0x136/0x190 net/mac802154/tx.c:232 __netdev_start_xmit include/linux/netdevice.h:5215 [inline] netdev_start_xmit include/linux/netdevice.h:5224 [inline] xmit_one net/core/dev.c:3830 [inline] dev_hard_start_xmit+0x2d4/0x830 net/core/dev.c:3846 sch_direct_xmit+0x241/0x4b0 net/sched/sch_generic.c:344 __dev_xmit_skb net/core/dev.c:4102 [inline] __dev_queue_xmit+0x17b6/0x3a70 net/core/dev.c:4679 dev_queue_xmit include/linux/netdevice.h:3355 [inline] tx+0x6b/0x190 drivers/block/aoe/aoenet.c:62 kthread+0x1cd/0x3e0 drivers/block/aoe/aoecmd.c:1237 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245