watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.2.38:6038] Modules linked in: irq event stamp: 17481741 hardirqs last enabled at (17481740): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:310 hardirqs last disabled at (17481741): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (8074664): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (8074664): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (8074664): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (8074667): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (8074667): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (8074667): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6038 Comm: syz.2.38 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: 0018:ffffc900000075c0 EFLAGS: 00000206 RAX: 2a1f91c846b8d900 RBX: 1ffff92000000ec0 RCX: 2a1f91c846b8d900 RDX: 0000000000000000 RSI: ffffffff8d9705ba RDI: ffffffff8be26f40 RBP: ffffc900000076b8 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: ffffffff8e142400 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 FS: 00007f96f32b36c0(0000) GS:ffff888125c5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f79365b6700 CR3: 0000000075f08000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 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 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_mempool_poison_object+0xad/0x130 mm/kasan/common.c:522 kasan_mempool_poison_object include/linux/kasan.h:360 [inline] napi_skb_cache_put+0x7b/0x730 net/core/skbuff.c:1422 skb_defer_free_flush net/core/dev.c:6634 [inline] net_rx_action+0x51b/0xe30 net/core/dev.c:7586 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: 0018:ffffc900050378a0 EFLAGS: 00000286 RAX: 2a1f91c846b8d900 RBX: 0000000000000000 RCX: 2a1f91c846b8d900 RDX: 0000000000000000 RSI: ffffffff8d9705ba RDI: 0000000000000001 RBP: ffffc90005037950 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000a06f14 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:zonelist_zone_idx include/linux/mmzone.h:1673 [inline] RIP: 0010:next_zones_zonelist include/linux/mmzone.h:1704 [inline] RIP: 0010:first_zones_zonelist include/linux/mmzone.h:1730 [inline] RIP: 0010:prepare_alloc_pages+0x2fc/0x610 mm/page_alloc.c:4747 Code: 4c 89 f7 e8 26 46 0d 00 48 be 00 00 00 00 00 fc ff df 49 8b 16 48 85 d2 75 4f 4d 8d 74 24 08 4c 89 f0 48 c1 e8 03 0f b6 04 30 <84> c0 0f 85 d4 01 00 00 41 39 2e 77 32 48 83 c3 10 48 89 d8 48 c1 RSP: 0018:ffffc90005037a10 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffffc90005037ac0 RCX: 0000000000000003 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffffc90005037ae0 RBP: 0000000000000002 R08: ffffc90005037ac0 R09: ffffc90005037a98 R10: ffffc90005037ac0 R11: fffff52000a06f5d R12: ffff88813fffd980 R13: 0000000000000000 R14: ffff88813fffd988 R15: 1ffff92000a06f58 __alloc_frozen_pages_noprof+0x123/0x370 mm/page_alloc.c:4948 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2450 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2618 new_slab mm/slub.c:2672 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3858 __slab_alloc mm/slub.c:3948 [inline] __slab_alloc_node mm/slub.c:4023 [inline] slab_alloc_node mm/slub.c:4184 [inline] kmem_cache_alloc_noprof+0x283/0x3c0 mm/slub.c:4203 sk_prot_alloc+0x57/0x220 net/core/sock.c:2241 sk_alloc+0x3a/0x370 net/core/sock.c:2303 inet_create+0x76b/0x1000 net/ipv4/af_inet.c:326 __sock_create+0x4b0/0x9f0 net/socket.c:1541 sock_create net/socket.c:1599 [inline] __sys_socket_create net/socket.c:1636 [inline] __sys_socket+0xd7/0x1b0 net/socket.c:1683 __do_sys_socket net/socket.c:1697 [inline] __se_sys_socket net/socket.c:1695 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1695 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f96f238e969 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:00007f96f32b3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f96f25b5fa0 RCX: 00007f96f238e969 RDX: 0000000000000084 RSI: 0000000000000001 RDI: 0000000000000002 RBP: 00007f96f2410ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f96f25b5fa0 R15: 00007ffd7be10ca8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6047 Comm: kworker/u8:8 Not tainted 6.15.0-syzkaller-gcd2e103d57e5 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0xf72/0x12d0 kernel/smp.c:885 Code: 01 31 ff e8 60 78 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 0b 74 0b 00 eb 37 f3 90 43 0f b6 04 2c 84 c0 75 10 <41> f7 07 01 00 00 00 74 1e e8 f0 73 0b 00 eb e5 44 89 f9 80 e1 07 RSP: 0018:ffffc900051076a0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff8880b873cb40 RCX: ffff888024ceda00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90005107800 R08: ffffffff8fa0bcf7 R09: 1ffffffff1f4179e R10: dffffc0000000000 R11: fffffbfff1f4179f R12: 1ffff110170c86b5 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b86435a8 FS: 0000000000000000(0000) GS:ffff888125d5f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9db36d5ff8 CR3: 000000000df36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052 on_each_cpu include/linux/smp.h:71 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2660 [inline] smp_text_poke_batch_finish+0x5e0/0x1100 arch/x86/kernel/alternative.c:2870 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_disable_cpuslocked+0xc5/0x1b0 kernel/jump_label.c:240 static_key_disable+0x1a/0x20 kernel/jump_label.c:248 toggle_allocation_gate+0x1a1/0x240 mm/kfence/core.c:855 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 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