rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (10505 ticks this GP) idle=9444/1/0x4000000000000000 softirq=190826/190826 fqs=91
rcu: 	(t=10501 jiffies g=214793 q=3034 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10319 jiffies! g214793 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=93265
rcu: rcu_preempt kthread starved for 10322 jiffies! g214793 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27528 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x17b4/0x5680 kernel/sched/core.c:7183
 __schedule_loop kernel/sched/core.c:7262 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7277
 schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 3039 Comm: syz.0.7314 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:430 [inline]
RIP: 0010:__pv_queued_spin_lock_slowpath+0x65e/0xbc0 kernel/locking/qspinlock.c:325
Code: 24 48 0f b6 04 01 84 c0 75 6f 48 8b 44 24 10 80 38 00 74 1d 48 b8 00 00 00 00 00 fc ff df 48 8b 4c 24 28 c6 44 01 06 f8 f3 90 <41> ff c4 75 bf eb 68 4c 8b 7c 24 10 4c 89 ff be 02 00 00 00 e8 39
RSP: 0018:ffffc90005ddfa00 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: ffffc90005ddfaa0 RCX: 1ffff92000bbbf4c
RDX: ffffc90016329000 RSI: 0000000000049761 RDI: ffff8880b873be00
RBP: ffffc90005ddfb10 R08: ffffffff903215b7 R09: 1ffffffff20642b6
R10: dffffc0000000000 R11: fffffbfff20642b7 R12: 00000000ffffbf6e
R13: 0000000000000000 R14: 1ffff110065eb03a R15: ffff8880b873be14
FS:  00007fd3c863f6c0(0000) GS:ffff888125345000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc1949e9f00 CR3: 00000000758a8000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:35 [inline]
 queued_spin_lock_slowpath arch/x86/include/asm/paravirt-spinlock.h:66 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock+0x26c/0x2f0 kernel/locking/spinlock_debug.c:116
 spin_lock_bh include/linux/spinlock.h:348 [inline]
 lock_sock_nested+0x6a/0x100 net/core/sock.c:3802
 lock_sock include/net/sock.h:1713 [inline]
 llc_ui_wait_for_conn net/llc/af_llc.c:609 [inline]
 llc_ui_connect+0x6a8/0xd50 net/llc/af_llc.c:523
 __sys_connect_file net/socket.c:2148 [inline]
 __sys_connect+0x312/0x450 net/socket.c:2167
 __do_sys_connect net/socket.c:2173 [inline]
 __se_sys_connect net/socket.c:2170 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:2170
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd3c779c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd3c863f028 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007fd3c7a15fa0 RCX: 00007fd3c779c819
RDX: 0000000000000010 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007fd3c7832c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd3c7a16038 R14: 00007fd3c7a15fa0 R15: 00007fff73bda828
 </TASK>
CPU: 0 UID: 0 PID: 3062 Comm: syz.3.7312 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x10/0x70 kernel/kcov.c:217
Code: de 5b e9 b3 1b 60 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 08 52 78 11 <65> 8b 15 29 52 78 11 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75
RSP: 0018:ffffc900000077e0 EFLAGS: 00000246
RAX: ffffffff866c4838 RBX: 0000000000000000 RCX: ffff888066393d80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffc90000007a7f R09: 0000000000000000
R10: ffffc90000007a10 R11: ffffffff866c4770 R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8880285bc028 R15: 0000000000000000
FS:  00007f02e13d56c0(0000) GS:ffff888125245000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556a3894d950 CR3: 000000002e1ea000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 bond_select_queue+0xc8/0x130 drivers/net/bonding/bond_main.c:5398
 netdev_core_pick_tx+0x11c/0x350 net/core/dev.c:4734
 __dev_queue_xmit+0x5d1/0x3950 net/core/dev.c:4825
 dev_queue_xmit include/linux/netdevice.h:3401 [inline]
 llc_conn_send_pdus+0x144/0x1e0 net/llc/llc_conn.c:344
 llc_conn_ac_send_sabme_cmd_p_set_x+0x2f9/0x420 net/llc/llc_c_ac.c:794
 llc_exec_conn_trans_actions net/llc/llc_conn.c:443 [inline]
 llc_conn_service net/llc/llc_conn.c:368 [inline]
 llc_conn_state_process+0x4f1/0x1360 net/llc/llc_conn.c:72
 llc_process_tmr_ev net/llc/llc_c_ac.c:1448 [inline]
 llc_conn_tmr_common_cb+0x34a/0x790 net/llc/llc_c_ac.c:1331
 call_timer_fn+0x192/0x5e0 kernel/time/timer.c:1748
 expire_timers kernel/time/timer.c:1799 [inline]
 __run_timers kernel/time/timer.c:2374 [inline]
 __run_timer_base+0x652/0x8b0 kernel/time/timer.c:2386
 run_timer_base kernel/time/timer.c:2395 [inline]
 run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2405
 handle_softirqs+0x22a/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:188 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:206
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 7a e6 eb f5 48 89 df e8 82 5b ec f5 e8 8d 77 17 f6 fb bf 01 00 00 00 <e8> 32 ed dd f5 65 8b 05 2b f0 87 07 85 c0 74 07 5b e9 d1 47 00 00
RSP: 0018:ffffc90005fef370 EFLAGS: 00000202
RAX: 0000000000002767 RBX: ffff888041ecad98 RCX: 0000000080000001
RDX: 0000000000000007 RSI: ffffffff8dfb65fa RDI: 0000000000000001
RBP: ffffc90005fef4d0 R08: ffffffff903215b7 R09: 1ffffffff20642b6
R10: dffffc0000000000 R11: fffffbfff20642b7 R12: ffffc90005fef420
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000001
 spin_unlock_irq include/linux/spinlock.h:402 [inline]
 shmem_add_to_page_cache+0xa5e/0xd40 mm/shmem.c:928
 shmem_alloc_and_add_folio+0x866/0xf80 mm/shmem.c:2001
 shmem_get_folio_gfp+0x5a9/0x1670 mm/shmem.c:2570
 shmem_fault+0x179/0x390 mm/shmem.c:2771
 __do_fault+0x138/0x390 mm/memory.c:5364
 do_read_fault mm/memory.c:5799 [inline]
 do_fault mm/memory.c:5933 [inline]
 do_pte_missing+0x228f/0x3490 mm/memory.c:4477
 handle_pte_fault mm/memory.c:6317 [inline]
 __handle_mm_fault mm/memory.c:6455 [inline]
 handle_mm_fault+0x1bec/0x3310 mm/memory.c:6624
 faultin_page mm/gup.c:1126 [inline]
 __get_user_pages+0x165b/0x29d0 mm/gup.c:1428
 populate_vma_page_range+0x2be/0x3c0 mm/gup.c:1860
 __mm_populate+0x25f/0x390 mm/gup.c:1963
 mm_populate include/linux/mm.h:3894 [inline]
 vm_mmap_pgoff+0x3aa/0x4f0 mm/util.c:586
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f02e319c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f02e13d5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f02e3416180 RCX: 00007f02e319c819
RDX: b635773f05ebbee1 RSI: 0000000000b36000 RDI: 0000200000000000
RBP: 00007f02e3232c91 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f02e3416218 R14: 00007f02e3416180 R15: 00007ffc6dcfa6d8
 </TASK>
sched: DL replenish lagged too much