kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [kworker/u4:0:7]
Modules linked in:
CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline]
RIP: 0010:smp_call_function_single+0x211/0x490 kernel/smp.c:517
Code: ff e8 03 85 0a 00 41 83 e6 01 49 bc 00 00 00 00 00 fc ff df 75 0a e8 3e 81 0a 00 e9 a4 00 00 00 f3 90 f7 44 24 48 01 00 00 00 <0f> 84 8f 00 00 00 e8 24 81 0a 00 eb e9 e8 dd 2b 22 03 89 c3 41 89
RSP: 0018:ffffc90000077700 EFLAGS: 00000202
RAX: ffffffff815a20dc RBX: 0000000000000000 RCX: ffff88810024e2c0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900000777f0 R08: ffff8881f7057647 R09: 1ffff1103ee0aec8
R10: dffffc0000000000 R11: ffffed103ee0aec9 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff9200000eee4
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200001000000 CR3: 000000000640f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 smp_call_function_many_cond+0x8f5/0x9d0 kernel/smp.c:653
 smp_call_function_many kernel/smp.c:716 [inline]
 smp_call_function kernel/smp.c:738 [inline]
 on_each_cpu+0xab/0x180 kernel/smp.c:837
 text_poke_sync arch/x86/kernel/alternative.c:1568 [inline]
 text_poke_bp_batch+0x1cb/0x5f0 arch/x86/kernel/alternative.c:1768
 text_poke_flush arch/x86/kernel/alternative.c:1959 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1966
 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:126
 __jump_label_update+0x38f/0x3b0 kernel/jump_label.c:459
 jump_label_update+0x34c/0x3e0 kernel/jump_label.c:825
 static_key_enable_cpuslocked+0x126/0x240 kernel/jump_label.c:177
 static_key_enable+0x1a/0x30 kernel/jump_label.c:190
 toggle_allocation_gate+0xba/0x440 mm/kfence/core.c:624
 process_one_work+0x6fd/0xbc0 kernel/workqueue.c:2301
 worker_thread+0xa8e/0x13c0 kernel/workqueue.c:2447
 kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1600 Comm: syz.3.317 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__vga_put drivers/gpu/vga/vgaarb.c:427 [inline]
RIP: 0010:vga_put drivers/gpu/vga/vgaarb.c:582 [inline]
RIP: 0010:vga_arb_release+0x389/0x920 drivers/gpu/vga/vgaarb.c:1370
Code: fe 43 0f b6 44 3d 00 84 c0 4c 8b 75 d0 0f 85 48 01 00 00 41 80 24 24 fd 43 0f b6 44 3d 00 84 c0 0f 85 d9 00 00 00 41 8b 1c 24 <44> 8b 65 c0 44 89 e7 89 de e8 39 89 b6 fe 41 39 dc 4c 8b 6d a8 75
RSP: 0018:ffffc90000b17c48 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88811dea8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000b17cd0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000162f74 R12: ffff888105bfc820
R13: 1ffff11020b7f904 R14: ffff888106b82424 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb87b44e540 CR3: 000000000640f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7c/0x24e0 kernel/exit.c:873
 __do_sys_exit kernel/exit.c:956 [inline]
 __se_sys_exit kernel/exit.c:954 [inline]
 __x64_sys_exit+0x40/0x40 kernel/exit.c:954
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f7ac601fe59
Code: Unable to access opcode bytes at RIP 0x7f7ac601fe2f.
RSP: 002b:00007f7ac4a79ef8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 0000000000000058 RCX: 00007f7ac601fe59
RDX: 00007f7ac4a7a9c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f7ac60b5e6f R08: 0000000000000000 R09: 0000000000000058
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7ac6299038 R14: 00007f7ac6298fa0 R15: 00007ffc08f38b38