kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [kworker/u4:1:9]
Modules linked in:
CPU: 0 PID: 9 Comm: kworker/u4:1 Tainted: G        W         5.4.290-syzkaller-00002-g41adfeb3d639 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__read_once_size include/linux/compiler.h:268 [inline]
RIP: 0010:csd_lock_wait kernel/smp.c:109 [inline]
RIP: 0010:smp_call_function_single+0x235/0x4a0 kernel/smp.c:311
Code: 0f 85 df 01 00 00 44 8b 74 24 58 44 89 f6 83 e6 01 31 ff e8 3d ab 0a 00 41 83 e6 01 75 0a e8 42 a8 0a 00 e9 f4 00 00 00 f3 90 <42> 0f b6 04 2b 84 c0 75 15 f7 44 24 58 01 00 00 00 0f 84 d6 00 00
RSP: 0018:ffff8881f5dcf8a0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffffffff8159a2e1 RBX: 1ffff1103ebb9f1f RCX: ffff8881f5dc3f00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff8881f5dcf990 R08: ffffffff8159a2b3 R09: ffffed103edeb189
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1103ebb9f18
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f85563f15a0 CR3: 0000000005e0e000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 smp_call_function_many+0x6fe/0x9b0 kernel/smp.c:451
 smp_call_function kernel/smp.c:509 [inline]
 on_each_cpu+0xa5/0x1a0 kernel/smp.c:616
 text_poke_bp_batch+0x11a/0x2b0 arch/x86/kernel/alternative.c:1051
 arch_jump_label_transform_apply+0x27/0x40 arch/x86/kernel/jump_label.c:167
 static_key_enable_cpuslocked+0x12c/0x240 kernel/jump_label.c:177
 static_key_enable+0x16/0x20 kernel/jump_label.c:190
 toggle_allocation_gate+0xb1/0x240 mm/kfence/core.c:624
 process_one_work+0x765/0xd20 kernel/workqueue.c:2290
 worker_thread+0xaef/0x1470 kernel/workqueue.c:2436
 kthread+0x2da/0x360 kernel/kthread.c:288
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:354
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3548 Comm: syz.8.741 Tainted: G        W         5.4.290-syzkaller-00002-g41adfeb3d639 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__sanitizer_cov_trace_cmp4+0x0/0x70 kernel/kcov.c:248
Code: 28 4c 39 d0 77 cf 89 f8 89 f6 48 c7 44 0a 08 02 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 49 ff c1 4c 89 09 c3 90 <4c> 8b 04 24 65 48 8b 05 44 41 9e 7e 65 8b 0d 49 41 9e 7e f7 c1 00
RSP: 0018:ffff8881e5db7ad8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8881c7b0de80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8296034f R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: ffff8881c524d018
R13: 0000000000000046 R14: dffffc0000000000 R15: ffffffff8611eaa0
FS:  00007f6b429726c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f55e75c4178 CR3: 00000001dbf40000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 __vga_put drivers/gpu/vga/vgaarb.c:427 [inline]
 vga_put drivers/gpu/vga/vgaarb.c:583 [inline]
 vga_arb_release+0x3b5/0x960 drivers/gpu/vga/vgaarb.c:1371
 __fput+0x262/0x680 fs/file_table.c:281
 task_work_run+0x140/0x170 kernel/task_work.c:113
 get_signal+0x13c6/0x1440 kernel/signal.c:2532
 do_signal+0xb0/0x11f0 arch/x86/kernel/signal.c:809
 exit_to_usermode_loop+0xc0/0x1a0 arch/x86/entry/common.c:159
 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f6b44308169
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:00007f6b42972038 EFLAGS: 00000246 ORIG_RAX: 000000000000010f
RAX: 0000000000000002 RBX: 00007f6b44520fa0 RCX: 00007f6b44308169
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000200000000180
RBP: 00007f6b44389990 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6b44520fa0 R15: 00007ffc3a2bf7d8