ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [kworker/u8:3:53] Modules linked in: irq event stamp: 39000200 hardirqs last enabled at (39000199): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:357 hardirqs last disabled at (39000200): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (39000198): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (39000198): [] handle_softirqs+0x5be/0x8e0 kernel/softirq.c:607 softirqs last disabled at (39000177): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (39000177): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (39000177): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 53 Comm: kworker/u8:3 Not tainted 6.15.0-rc3-syzkaller-00019-gbc3372351d0c #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0x4aa/0x1290 kernel/smp.c:885 Code: 0c 00 85 ed 74 48 48 8b 44 24 20 49 89 c4 83 e0 07 49 c1 ec 03 48 89 c5 4d 01 f4 83 c5 03 e8 bd 17 0c 00 f3 90 41 0f b6 04 24 <40> 38 c5 7c 08 84 c0 0f 85 de 0b 00 00 8b 43 08 31 ff 83 e0 01 41 RSP: 0018:ffffc90000be7938 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff8880b84415e0 RCX: ffffffff81af27a9 RDX: ffff88801deada00 RSI: ffffffff81af2783 RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffed10170882bd R13: 0000000000000001 R14: dffffc0000000000 R15: ffff8880b853b180 FS: 0000000000000000(0000) GS:ffff888124ab8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6e58d1c000 CR3: 000000000e180000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x40/0x90 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+0x220/0x760 arch/x86/kernel/alternative.c:2665 text_poke_flush arch/x86/kernel/alternative.c:2856 [inline] text_poke_flush arch/x86/kernel/alternative.c:2853 [inline] text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2863 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 jump_label_update+0x376/0x550 kernel/jump_label.c:919 static_key_enable_cpuslocked+0x1b7/0x270 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate mm/kfence/core.c:850 [inline] toggle_allocation_gate+0xfa/0x280 mm/kfence/core.c:842 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c5/0x780 kernel/kthread.c:464 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31701 Comm: syz.0.3702 Not tainted 6.15.0-rc3-syzkaller-00019-gbc3372351d0c #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:121 [inline] RIP: 0010:lock_acquire kernel/locking/lockdep.c:5842 [inline] RIP: 0010:lock_acquire+0x111/0x350 kernel/locking/lockdep.c:5823 Code: 14 94 ff e9 45 ff ff ff 48 8b 74 24 68 48 89 df e8 64 7f 87 00 8b 0d c2 77 ee 0e 85 c9 0f 84 b1 00 00 00 65 8b 05 a7 9c 0e 12 <85> c0 0f 85 a2 00 00 00 65 48 8b 05 27 5f 0e 12 8b 90 ec 0a 00 00 RSP: 0018:ffffc90000007d18 EFLAGS: 00000002 RAX: 0000000000000000 RBX: ffffffff8e3bf5c0 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff89808639 RDI: fffffbfff1c77eb8 RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000 R10: ffff88805643d2eb R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007facc59f66c0(0000) GS:ffff8881249b8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2a8c980178 CR3: 000000003b7d6000 CR4: 0000000000350ef0 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] advance_sched+0x699/0xc80 net/sched/sch_taprio.c:985 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x202/0xad0 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x10b/0x3f0 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__skb_try_recv_datagram+0x24b/0x500 net/core/datagram.c:283 Code: 02 00 00 48 8b 44 24 40 45 31 e4 44 89 28 e8 ec 32 77 f8 48 8b 4c 24 48 48 b8 00 00 00 00 00 fc ff df 48 c7 04 01 00 00 00 00 <48> 8b 84 24 a8 00 00 00 65 48 2b 05 8d 73 62 0a 0f 85 8c 02 00 00 RSP: 0018:ffffc90019127748 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff888012337380 RCX: 1ffff92003224ef3 RDX: 0000000000080000 RSI: ffffffff89440c54 RDI: 0000000000000005 RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888032555a00 R13: 0000000000000000 R14: ffff888012337468 R15: ffffc900191278d8 __unix_dgram_recvmsg+0x1cd/0xee0 net/unix/af_unix.c:2420 unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2522 sock_recvmsg_nosec net/socket.c:1017 [inline] ____sys_recvmsg+0x5f9/0x6b0 net/socket.c:2784 ___sys_recvmsg+0x114/0x1a0 net/socket.c:2828 do_recvmmsg+0x2fe/0x740 net/socket.c:2923 __sys_recvmmsg net/socket.c:2997 [inline] __do_sys_recvmmsg net/socket.c:3020 [inline] __se_sys_recvmmsg net/socket.c:3013 [inline] __x64_sys_recvmmsg+0x22a/0x280 net/socket.c:3013 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7facc7b8e169 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:00007facc59f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 00007facc7db6080 RCX: 00007facc7b8e169 RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000007 RBP: 00007facc7c10a68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007facc7db6080 R15: 00007ffcfdd69338