syzbot

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-...D } 10276 jiffies s: 3937 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2331 Comm: syz.3.671 Not tainted syzkaller #0 d27bf65064ef37e242848a5d573511e9710340a8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:_raw_spin_lock_irqsave+0xf2/0x150 kernel/locking/spinlock.c:162
Code: 44 25 00 00 00 00 00 43 c7 44 25 08 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 60 75 56 4c 89 f0 48 8d 65 d8 5b 41 5c <41> 5d 41 5e 41 5f 5d e9 02 3f 00 00 cc 89 44 24 20 48 c7 c1 d8 6c
RSP: 0018:ffffc9000dd9fcd0 EFLAGS: 00000046
RAX: 0000000000000806 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc9000dd9fc60
RBP: ffffc9000dd9fce8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001bb3f8c R12: ffff88810e26a000
R13: 1ffff92001bb3f88 R14: 0000000000000806 R15: ffffc9000dd9fc60
FS:  000055558b2ef500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc976278f98 CR3: 0000000113972000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 vga_put drivers/pci/vgaarb.c:547 [inline]
 vga_arb_release+0x20f/0x950 drivers/pci/vgaarb.c:1455
 __fput+0x1fb/0xa00 fs/file_table.c:429
 ____fput+0x20/0x30 fs/file_table.c:457
 task_work_run+0x1e0/0x250 kernel/task_work.c:240
 resume_user_mode_work+0x36/0x50 include/linux/resume_user_mode.h:50
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x64/0xb0 kernel/entry/common.c:218
 do_syscall_64+0x64/0xf0 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fc97538eec9
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:00007ffc4c7c94e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 000000000000ff4a RCX: 00007fc97538eec9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fc9755e7da0 R08: 0000000000000001 R09: 000000144c7c97df
R10: 0000001b2e020000 R11: 0000000000000246 R12: 00007fc9755e5fac
R13: 00007fc9755e5fa0 R14: ffffffffffffffff R15: 00007ffc4c7c9600
 </TASK>