GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5833/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=32881, q=722806 ncpus=2)
task:syz-executor    state:R  running task     stack:19632 pid:5833  tgid:5833  ppid:5828   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7078
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5853
Code: 2b 00 74 08 4c 89 f7 e8 1a 27 8b 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90003f0fb40 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920007e1f74 RCX: ffff88802efdc6d8
RDX: dffffc0000000000 RSI: ffffffff8c0aaae0 RDI: ffffffff8c5fb0a0
RBP: ffffc90003f0fca0 R08: ffffffff942a5887 R09: 1ffffffff2854b10
R10: dffffc0000000000 R11: fffffbfff2854b11 R12: 1ffff920007e1f70
R13: dffffc0000000000 R14: ffffc90003f0fba0 R15: 0000000000000246
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 task_cls_classid include/net/cls_cgroup.h:32 [inline]
 sock_update_classid+0x7a/0x3a0 include/net/cls_cgroup.h:44
 sk_alloc+0x258/0x370 net/core/sock.c:2245
 inet_create+0x648/0xea0 net/ipv4/af_inet.c:326
 __sock_create+0x4c0/0xa30 net/socket.c:1558
 sock_create net/socket.c:1616 [inline]
 __sys_socket_create net/socket.c:1653 [inline]
 __sys_socket+0x150/0x3c0 net/socket.c:1700
 __do_sys_socket net/socket.c:1714 [inline]
 __se_sys_socket net/socket.c:1712 [inline]
 __x64_sys_socket+0x7a/0x90 net/socket.c:1712
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc20c587c47
RSP: 002b:00007ffe6b1d22c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fc20c587c47
RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 00007ffe6b1d29ac R08: 00007ffe6b1d22bc R09: 00007ffe6b1d26c7
R10: 00007ffe6b1d2340 R11: 0000000000000202 R12: 0000000000000032
R13: 0000000000039e20 R14: 00007ffe6b1d2a00 R15: 000000000000014b
 </TASK>
rcu: rcu_preempt kthread starved for 10510 jiffies! g32881 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:25976 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5369 [inline]
 __schedule+0x1850/0x4c30 kernel/sched/core.c:6756
 __schedule_loop kernel/sched/core.c:6833 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6848
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2247
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 9276 Comm: udevd Not tainted 6.13.0-rc6-syzkaller-00134-g76201b597976 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0033:0x7f7542783b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff35906f18 EFLAGS: 00000246
RAX: 0000000000000080 RBX: 0000000000000000 RCX: 00007f7542783b6a
RDX: 0000000000000080 RSI: 00007fff35907008 RDI: 0000000000000003
RBP: 00007fff35906f58 R08: 0000000000000007 R09: 74ab44cfbeef4921
R10: 00000000ffffffff R11: 0000000000000246 R12: 000056122e7a3500
R13: 00007fff35906f58 R14: 0000000000000001 R15: 000056122e7a3910
FS:  00007f75426adc80 GS:  0000000000000000