rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10002 jiffies, g=3213, q=415 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 9999 (4294955569-4294945570), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 9999 jiffies! g3213 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:14448 pid:16    tgid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0x691/0x970 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xab/0x110 kernel/sched/core.c:6778
 schedule_timeout+0x117/0x190 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x17a/0x590 kernel/rcu/tree.c:1631
 rcu_gp_kthread+0x1c/0x110 kernel/rcu/tree.c:1830
 kthread+0xe9/0x100 kernel/kthread.c:388
 ret_from_fork+0x32/0x40 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 PID: 3462 Comm: syz.3.15 Not tainted 6.7.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:lock_acquire+0x13c/0x1f0
Code: c7 44 24 08 00 00 00 00 9c 8f 44 24 08 f7 44 24 08 00 02 00 00 75 45 f7 04 24 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 10 0f 85 a3 00 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc90001e7f938 EFLAGS: 00000206
RAX: fd7099a9ccbebf00 RBX: 0000000000000246 RCX: 000000000d59083f
RDX: 3befa455deb199d0 RSI: ffffffff8305dfb0 RDI: ffffffff830bf294
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff836075d8
FS:  00007f943fc5e6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3225ffff CR3: 000000010cb4c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 fs_reclaim_acquire+0x8b/0xe0 mm/page_alloc.c:3710
 might_alloc include/linux/sched/mm.h:303 [inline]
 bdev_getblk+0x2c/0x320 fs/buffer.c:1425
 __bread_gfp+0x25/0xf0 fs/buffer.c:1474
 sb_bread include/linux/buffer_head.h:324 [inline]
 __exfat_ent_get fs/exfat/fatent.c:48 [inline]
 exfat_ent_get+0x59/0x140 fs/exfat/fatent.c:97
 __exfat_free_cluster+0x15a/0x200 fs/exfat/fatent.c:200
 exfat_free_cluster+0x35/0x60 fs/exfat/fatent.c:232
 __exfat_truncate+0x1ac/0x1f0 fs/exfat/file.c:229
 exfat_truncate+0x42/0xd0 fs/exfat/file.c:253
 exfat_setattr+0x445/0x490 fs/exfat/file.c:355
 notify_change+0x2e9/0x360 fs/attr.c:499
 do_truncate+0xe1/0x120 fs/open.c:66
 handle_truncate fs/namei.c:3280 [inline]
 do_open fs/namei.c:3626 [inline]
 path_openat+0xc97/0xd80 fs/namei.c:3779
 do_filp_open+0xac/0x150 fs/namei.c:3809
 do_sys_openat2+0x7e/0xe0 fs/open.c:1437
 do_sys_open fs/open.c:1452 [inline]
 __do_sys_creat fs/open.c:1528 [inline]
 __se_sys_creat fs/open.c:1522 [inline]
 __x64_sys_creat+0x46/0x70 fs/open.c:1522
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x4d/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f943ed7fed9
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:00007f943fc5e058 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f943ef45fa0 RCX: 00007f943ed7fed9
RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000020000000
RBP: 00007f943edf3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f943ef45fa0 R15: 00007ffc89ae99a8
 </TASK>