rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6517/1:b..l
rcu: 	(detected by 1, t=10503 jiffies, g=20265, q=721 ncpus=2)
task:modprobe        state:R  running task     stack:26488 pid:6517  tgid:6517  ppid:3299   task_flags:0x400000 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x10e9/0x6820 kernel/sched/core.c:7189
 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7513
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
 irqentry_exit+0x1fe/0x790 kernel/entry/common.c:164
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:task_css include/linux/cgroup.h:522 [inline]
RIP: 0010:mem_cgroup_from_task mm/memcontrol.c:1089 [inline]
RIP: 0010:get_mem_cgroup_from_mm+0x189/0x5e0 mm/memcontrol.c:1142
Code: a0 9f c3 8b c6 05 e3 ea 40 0e 01 e8 e1 29 65 ff 48 85 db 0f 85 1a ff ff ff 48 8b 1d 41 d4 58 0e e9 5c ff ff ff e8 d7 05 6d ff <85> c0 0f 85 2d ff ff ff be ff ff ff ff 48 c7 c7 e0 9a 84 8e e8 0e
RSP: 0000:ffffc90004387b70 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff888031e40000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8defaa14 RDI: ffffffff8c1c3680
RBP: dffffc0000000000 R08: 00000000279986e4 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000000 R12: ffff88807b2d0c40
R13: ffffed100f65a2d6 R14: ffffffff827ef479 R15: ffffffff8e845b20
 __mem_cgroup_charge+0x1a/0x1c0 mm/memcontrol.c:5031
 mem_cgroup_charge include/linux/memcontrol.h:644 [inline]
 folio_prealloc mm/memory.c:1198 [inline]
 alloc_anon_folio mm/memory.c:5282 [inline]
 do_anonymous_page+0xb6e/0x2050 mm/memory.c:5376
 do_pte_missing mm/memory.c:4548 [inline]
 handle_pte_fault mm/memory.c:6411 [inline]
 __handle_mm_fault+0x1d2c/0x2a00 mm/memory.c:6549
 handle_mm_fault+0x36d/0xa20 mm/memory.c:6718
 do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1334
 handle_page_fault arch/x86/mm/fault.c:1474 [inline]
 exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1527
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f0dbf75d201
RSP: 002b:00007ffe23f33f30 EFLAGS: 00010206
RAX: 0000000000000001 RBX: 00007ffe23f34530 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 00005559ad2ea539 RDI: 00007f0dbf78b310
RBP: 00007ffe23f349a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00007f0dbf78b310 R11: 00007ffe23f34460 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0dbf78b310 R15: 00005559ad2ea539
 </TASK>
rcu: rcu_preempt kthread starved for 10528 jiffies! g20265 f0x0 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:28216 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x10e9/0x6820 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0xdd/0x390 kernel/sched/core.c:7283
 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2297
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 6512 Comm: syz.0.28 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__sanitizer_cov_trace_pc+0xb/0x70 kernel/kcov.c:213
Code: 61 00 be 03 00 00 00 5b e9 f2 c2 f0 02 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 8b 05 05 1d 02 12 <48> 8b 34 24 65 48 8b 15 e1 1c 02 12 a9 00 01 ff 00 74 1b f6 c4 01
RSP: 0018:ffffc90004347ed0 EFLAGS: 00000293
RAX: 0000000080000000 RBX: ffff88806ff14680 RCX: ffffffff81d01b56
RDX: 1ffff110063d2130 RSI: ffffffff81d01cc6 RDI: ffff888031e90980
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888031f9ee78
R13: ffff888031f9ecc0 R14: 0000000000000000 R15: 0000000000000027
FS:  00007f03332516c0(0000) GS:ffff888124475000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feda29fd000 CR3: 0000000022bcf000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __task_pid_nr_ns+0x8f/0x510 kernel/pid.c:568
 task_tgid_vnr include/linux/pid.h:298 [inline]
 __do_sys_getpid+0x1d/0x30 kernel/sys.c:1001
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x10b/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0332394ad7
Code: 8d 3d 5b 4a 0b 00 e8 58 1d fa ff e8 23 87 00 00 0f 1f 00 b8 68 00 00 00 0f 05 c3 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 <c3> 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007f03332503c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: ffffffffffffffda RBX: 00007f0333250530 RCX: 00007f0332394ad7
RDX: 00007f0333250400 RSI: 00007f0333250530 RDI: 0000000000000021
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007f0332616128 R14: 00007fff590d80a0 R15: 00007fff590d8188
 </TASK>