rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10002 jiffies, g=6137, q=87 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10003 (4294955095-4294945092), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10004 jiffies! g6137 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:14144 pid:16    tgid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x6a9/0xa70 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0xac/0x140 kernel/sched/core.c:6774
 schedule_timeout+0x116/0x190 kernel/time/timer.c:2615
 rcu_gp_fqs_loop+0x188/0x580 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x1c/0x110 kernel/rcu/tree.c:2247
 kthread+0xe9/0x100 kernel/kthread.c:389
 ret_from_fork+0x32/0x40 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: 1 UID: 0 PID: 5054 Comm: f2fs_gc-7:6 Not tainted 6.12.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:increase_sleep_time fs/f2fs/gc.h:152 [inline]
RIP: 0010:gc_thread_func+0x1f0/0x7e0 fs/f2fs/gc.c:70
Code: 85 ea 05 00 00 48 8b 03 66 83 b8 30 03 00 00 00 74 27 45 3b 6e 64 0f 84 97 fe ff ff 41 8b 46 5c 41 8b 4e 60 44 89 ea 48 01 c2 <41> 01 c5 48 39 ca 44 0f 47 e9 e9 7a fe ff ff 44 89 6c 24 04 48 8b
RSP: 0018:ffffc900028f3e58 EFLAGS: 00000206
RAX: 0000000000007530 RBX: ffff8881063d0000 RCX: 000000000000ea60
RDX: 0000000000015f90 RSI: ffffffff83274cd6 RDI: 000000000000ea69
RBP: ffff88810c79c2b0 R08: 0000000000000000 R09: 000000000000056a
R10: 0000000000000000 R11: 0000000000005800 R12: 0000000000001701
R13: 000000000000ea60 R14: ffff88810c79c200 R15: 0000000000007530
FS:  0000000000000000(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0467de5f98 CR3: 000000010333c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 kthread+0xe9/0x100 kernel/kthread.c:389
 ret_from_fork+0x32/0x40 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>