rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 1, t=10502 jiffies, g=5737, q=118 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4294953458-4294942957), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g5737 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:28096 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965
rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:1905
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 4281 Comm: syz-executor749 Not tainted 6.1.142-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__syscall_enter_from_user_work kernel/entry/common.c:97 [inline]
RIP: 0010:syscall_enter_from_user_mode+0x2a/0x80 kernel/entry/common.c:118
Code: 41 56 53 48 89 f3 49 89 fe 48 8b 7c 24 10 e8 ed fa ff ff 66 90 66 90 e8 04 5d 77 f7 e8 7f 5b 77 f7 fb 65 48 8b 05 56 97 f2 75 <48> 8b 70 08 40 f6 c6 3f 74 0b 4c 89 f7 5b 41 5e e9 51 f4 5d f7 48
RSP: 0018:ffffc90003ec7f08 EFLAGS: 00000286
RAX: ffff88807b349dc0 RBX: 000000000000000f RCX: 74f9624b6b078200
RDX: dffffc0000000000 RSI: ffffffff8a6bffe0 RDI: ffffffff8abf14a0
RBP: ffffc90003ec7f48 R08: dffffc0000000000 R09: fffffbfff1bfd1a6
R10: fffffbfff1bfd1a6 R11: 1ffffffff1bfd1a5 R12: 0000000000000000
R13: 0000000000000000 R14: ffffc90003ec7f58 R15: 0000000000000000
FS: 00005555596573c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f845d7ece60 CR3: 000000007a1cc000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_syscall_64+0x24/0xa0 arch/x86/entry/common.c:77
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f845d7ece69
Code: 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 90 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 c7 c0 0f 00 00 00 0f 05 <0f> 1f 80 00 00 00 00 48 81 ec 48 01 00 00 49 89 d0 64 48 8b 04 25
RSP: 002b:00007fff744bd200 EFLAGS: 00000206 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f845d7ece69
RDX: 00007fff744bd200 RSI: 00007fff744bd330 RDI: 0000000000000021
RBP: 0000000000000000 R08: 00007f845d78a990 R09: 00007f845d78a990
R10: 0000000000000000 R11: 0000000000000206 R12: 00007f845d824165
R13: 0000000000000003 R14: 00007fff744bd7f0 R15: 0000000000000000