watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.7.1308:11270] Modules linked in: irq event stamp: 14140653 hardirqs last enabled at (14140652): [] irqentry_exit+0x5e8/0x670 kernel/entry/common.c:219 hardirqs last disabled at (14140653): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (8356578): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (8356578): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (8356578): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 softirqs last disabled at (8356581): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (8356581): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (8356581): [] __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 11270 Comm: syz.7.1308 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__kernel_text_address+0x5/0x40 kernel/extable.c:78 Code: c1 48 c7 c7 80 e2 81 8f e8 68 57 9a 00 eb b3 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 53 <48> 89 fb e8 43 00 00 00 85 c0 0f 95 c0 48 81 fb 00 a0 eb 90 0f 93 RSP: 0018:ffffc90000007658 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc900000076d0 RCX: 0000000000000101 RDX: 0000000000000002 RSI: ffffffff8d976a88 RDI: ffffffff892e99e1 RBP: ffffc90000007710 R08: ffffc900000071d7 R09: 0000000000000000 R10: ffffc900000071c8 R11: fffff52000000e3b R12: ffff888029e35b80 R13: 00000000000002c0 R14: dffffc0000000000 R15: 1ffff92000000eda FS: 00007fda7f2516c0(0000) GS:ffff888125e1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fda7f20fd58 CR3: 00000000567d6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385 arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x9c/0xe0 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_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_node_noprof+0x43c/0x720 mm/slub.c:5315 kmalloc_reserve+0xbd/0x290 net/core/skbuff.c:586 __alloc_skb+0x204/0x3a0 net/core/skbuff.c:690 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+0x369/0x6a0 net/ipv6/addrconf.c:4037 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+0x22b/0x7c0 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x60/0x150 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:7190 Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 54 bf 01 00 00 00 e8 73 bb 35 f6 e8 5e d1 6d f6 fb bf 01 00 00 00 c3 a9 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 e4 d2 6d f6 bf 01 RSP: 0018:ffffc9000c367378 EFLAGS: 00000206 RAX: 0000000000003f53 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000006 RSI: ffffffff8d792d31 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff8f822477 R09: 1ffffffff1f0448e R10: dffffc0000000000 R11: fffffbfff1f0448f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit+0x5e3/0x670 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:sock_update_classid+0x1/0x3a0 include/net/cls_cgroup.h:41 Code: f5 5e 92 f8 be 01 00 00 00 48 89 df 5b 41 5e 5d e9 a4 61 5f fb 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 <41> 57 41 56 41 55 41 54 53 48 89 fb e8 be 5e 92 f8 65 4c 8b 3c 25 RSP: 0018:ffffc9000c367498 EFLAGS: 00000287 RAX: 0000000000000000 RBX: ffff888029ea4f80 RCX: 0000000000000046 RDX: 0000000000000001 RSI: ffffffff8d976a88 RDI: ffff888029ea5438 RBP: dffffc0000000000 R08: ffffc9000c367097 R09: 0000000000000000 R10: ffffc9000c367088 R11: fffff5200186ce13 R12: 0000000000000001 R13: ffff888029ea4f93 R14: ffff888029ea4f80 R15: ffff888029ea5438 sk_alloc+0x263/0x390 net/core/sock.c:2331 inet6_create+0x7f0/0x1260 net/ipv6/af_inet6.c:193 __sock_create+0x4b3/0x9d0 net/socket.c:1605 mptcp_subflow_create_socket+0xf0/0x800 net/mptcp/subflow.c:1790 __mptcp_socket_create net/mptcp/protocol.c:108 [inline] __mptcp_nmpc_sk+0x148/0x760 net/mptcp/protocol.c:140 mptcp_sendmsg_fastopen+0xd4/0x580 net/mptcp/protocol.c:1771 mptcp_sendmsg+0x179f/0x19b0 net/mptcp/protocol.c:1883 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg+0xe5/0x270 net/socket.c:742 ____sys_sendmsg+0x505/0x820 net/socket.c:2592 ___sys_sendmsg+0x21f/0x2a0 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+0x19b/0x260 net/socket.c:2681 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fda7e38f749 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:00007fda7f251038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fda7e5e5fa0 RCX: 00007fda7e38f749 RDX: 0000000020000081 RSI: 0000200000000780 RDI: 000000000000000b RBP: 00007fda7e413f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fda7e5e6038 R14: 00007fda7e5e5fa0 R15: 00007fff45bfe008 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1300 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:bytes_is_nonzero mm/kasan/generic.c:98 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:115 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:140 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:172 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:191 [inline] RIP: 0010:kasan_check_range+0x9f/0x2c0 mm/kasan/generic.c:200 Code: 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 <0f> 85 de 01 00 00 49 ff c3 48 ff c3 75 ee e9 21 01 00 00 44 89 dd RSP: 0018:ffffc9000467ed68 EFLAGS: 00000246 RAX: ffffc9000467ee01 RBX: ffffffffffffffff RCX: ffffffff81a2174e RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8de37950 RBP: ffffc9000467ef20 R08: ffffffff8de37957 R09: 1ffffffff1bc6f2a R10: dffffc0000000000 R11: fffffbfff1bc6f2a R12: 0000000000000001 R13: 000000000000000d R14: fffffbfff1bc6f2b R15: 1ffffffff1bc6f2a FS: 0000000000000000(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c363ed9 CR3: 0000000020298000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] atomic_long_read include/linux/atomic/atomic-instrumented.h:3188 [inline] prb_read kernel/printk/printk_ringbuffer.c:1976 [inline] _prb_read_valid+0x20e/0xa90 kernel/printk/printk_ringbuffer.c:2170 prb_read_valid+0x3c/0x60 kernel/printk/printk_ringbuffer.c:2242 printk_get_next_message+0x15c/0x7b0 kernel/printk/printk.c:2999 console_emit_next_record kernel/printk/printk.c:3083 [inline] console_flush_one_record kernel/printk/printk.c:3215 [inline] console_flush_all+0x4fb/0xb00 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+0x47b/0x550 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:12903 netdev_warn+0x10a/0x160 net/core/dev.c:12956 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+0x1379/0x31c0 net/core/dev.c:4785 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+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246