watchdog: BUG: soft lockup - CPU#0 stuck for 122s! [syz.1.1082:10281] Modules linked in: irq event stamp: 11733953 hardirqs last enabled at (11733952): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11733953): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (11569850): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (11569850): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (11569850): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (11569853): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (11569853): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (11569853): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 10281 Comm: syz.1.1082 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:get_timer_cpu_base kernel/time/timer.c:967 [inline] RIP: 0010:get_timer_base kernel/time/timer.c:986 [inline] RIP: 0010:lock_timer_base kernel/time/timer.c:1045 [inline] RIP: 0010:__mod_timer+0x195/0xf30 kernel/time/timer.c:1127 Code: 00 00 44 0f 45 e0 31 ff e8 78 5e 12 00 4e 8d 3c fd 10 dc 96 8d 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 1b 4f 74 00 <49> 69 c4 c0 10 00 00 4c 8d a0 80 84 75 92 4d 03 27 4c 89 e7 e8 92 RSP: 0018:ffffc90000007b00 EFLAGS: 00000246 RAX: 1ffffffff1b2db82 RBX: 1ffff1100c596b86 RCX: 0000000000000100 RDX: ffff888068715a00 RSI: 0000000000000000 RDI: 0000000000000000 RBP: dffffc0000000000 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 0000000000000001 R13: 0000000003000000 R14: ffff888062cb5c30 R15: ffffffff8d96dc10 FS: 00007fdd268526c0(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f22526e56c0 CR3: 000000006ab08000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 000000000f35062a Call Trace: call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1789 expire_timers kernel/time/timer.c:1840 [inline] __run_timers kernel/time/timer.c:2414 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2426 run_timer_base kernel/time/timer.c:2435 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2445 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:finish_task_switch+0x26b/0x950 kernel/sched/core.c:5250 Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 ff 83 c6 09 e8 6a 66 35 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 RSP: 0018:ffffc90003637658 EFLAGS: 00000282 RAX: 2fa5c98834a26200 RBX: 0000000000000000 RCX: 2fa5c98834a26200 RDX: 0000000000000000 RSI: ffffffff8d749f78 RDI: ffffffff8bc1cde0 RBP: ffffc900036376b0 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: ffff888068715a00 R13: dffffc0000000000 R14: ffff88801c6f3c00 R15: ffff8880b883a6d8 context_switch kernel/sched/core.c:5385 [inline] __schedule+0x16ea/0x4cd0 kernel/sched/core.c:6767 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7090 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:css_put include/linux/cgroup_refcnt.h:78 [inline] RIP: 0010:__memcg_slab_post_alloc_hook+0x149/0x820 mm/memcontrol.c:3061 Code: 07 00 00 49 89 c6 48 89 c7 48 89 de 41 89 ec 89 ea e8 7b f7 dc ff 89 c3 4c 89 f9 4d 8d 7e 54 4c 89 f8 48 c1 e8 03 0f b6 04 08 <84> c0 0f 85 29 06 00 00 41 f6 07 01 75 0c 49 83 c6 10 4c 89 f7 e8 RSP: 0018:ffffc90003637a48 EFLAGS: 00000a07 RAX: 0000000000000000 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: ffffc90014618000 RSI: 0000000000000652 RDI: 0000000000000653 RBP: 0000000000000cc0 R08: ffffc9000363764f R09: 0000000000000000 R10: ffffc90003637640 R11: ffffffffa00006d8 R12: 0000000000000cc0 R13: ffffc90003637b00 R14: ffff888030068000 R15: ffff888030068054 memcg_slab_post_alloc_hook mm/slub.c:2197 [inline] slab_post_alloc_hook mm/slub.c:4171 [inline] slab_alloc_node mm/slub.c:4210 [inline] kmem_cache_alloc_lru_noprof+0x2c7/0x3d0 mm/slub.c:4229 __d_alloc+0x31/0x6f0 fs/dcache.c:1681 d_alloc_pseudo+0x1f/0xb0 fs/dcache.c:1812 alloc_path_pseudo fs/file_table.c:360 [inline] alloc_file_pseudo+0xcc/0x210 fs/file_table.c:376 __anon_inode_getfile fs/anon_inodes.c:109 [inline] __anon_inode_getfd fs/anon_inodes.c:234 [inline] anon_inode_getfd+0xca/0x1b0 fs/anon_inodes.c:269 map_create+0xdb6/0x1150 kernel/bpf/syscall.c:1540 __sys_bpf+0x67e/0x860 kernel/bpf/syscall.c:5816 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5939 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdd2598e969 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:00007fdd26852038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fdd25bb5fa0 RCX: 00007fdd2598e969 RDX: 0000000000000048 RSI: 0000200000000340 RDI: 0000000000000000 RBP: 00007fdd25a10ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fdd25bb5fa0 R15: 00007ffd9bb05cc8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 65 Comm: kworker/u8:5 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #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+0xe6e/0x11c0 kernel/smp.c:885 Code: 89 ee 83 e6 01 31 ff e8 20 6d 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cb 68 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 b0 68 0b 00 eb e5 44 89 RSP: 0000:ffffc90001577700 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880b893ad40 RCX: ffff88801eaada00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90001577860 R08: ffffffff8f7ed377 R09: 1ffffffff1efda6e R10: dffffc0000000000 R11: fffffbfff1efda6f R12: 1ffff11017108245 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8841228 FS: 0000000000000000(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f66d94b5010 CR3: 000000000dd36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2455 [inline] text_poke_bp_batch+0x319/0x940 arch/x86/kernel/alternative.c:2665 text_poke_flush arch/x86/kernel/alternative.c:2856 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2863 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+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245