rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10501 ticks this GP) idle=8454/1/0x4000000000000000 softirq=64268/64268 fqs=0
rcu: 	(t=10502 jiffies g=51713 q=1108 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10502 jiffies! g51713 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=23428
rcu: rcu_preempt kthread starved for 10505 jiffies! g51713 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:27320 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x149b/0x4fd0 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6960
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
CPU: 1 UID: 0 PID: 12906 Comm: syz.0.1800 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:taprio_dequeue_tc_priority+0x27f/0x750 net/sched/sch_taprio.c:801
Code: 04 20 84 c0 0f 85 39 02 00 00 45 8b 36 89 df 44 89 f6 e8 a4 86 50 f8 44 39 f3 73 15 48 8b 5c 24 10 48 85 db 0f 85 7a 04 00 00 <e8> cc 84 50 f8 eb 29 42 0f b6 44 25 00 84 c0 48 8b 5c 24 10 0f 85
RSP: 0018:ffffc90000a08cd8 EFLAGS: 00000246
RAX: ffffffff897072dc RBX: 0000000000000000 RCX: 0000000000000100
RDX: ffff88803e770000 RSI: 0000000000000010 RDI: 0000000000000009
RBP: 1ffff11007fc466a R08: ffffffff896fcc56 R09: ffffffff8df41aa0
R10: 0000000000000001 R11: ffffffff89631050 R12: dffffc0000000000
R13: ffff88803fe23354 R14: 0000000000000010 R15: 0000000000000002
FS:  00007fa27aa356c0(0000) GS:ffff888125f1f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000034000 CR3: 0000000054c42000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 taprio_dequeue+0x186/0x550 net/sched/sch_taprio.c:-1
 dequeue_skb net/sched/sch_generic.c:297 [inline]
 qdisc_restart net/sched/sch_generic.c:402 [inline]
 __qdisc_run+0x23f/0x1510 net/sched/sch_generic.c:420
 qdisc_run+0xc7/0x300 include/net/pkt_sched.h:120
 net_tx_action+0x717/0x900 net/core/dev.c:5782
 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x60/0x150 kernel/softirq.c:723
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:free_frozen_page_commit+0x3a/0x1290 mm/page_alloc.c:2840
Code: 4c 24 10 45 89 c7 89 cd 49 89 d4 49 89 f6 48 89 7c 24 48 49 bd 00 00 00 00 00 fc ff df e8 1e db 40 09 89 44 24 54 49 8d 5e 55 <48> 89 d8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 47 02 00 00 d0 2b
RSP: 0018:ffffc9000be3f638 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8880b8740b95 RCX: 0000000080000002
RDX: ffffea00022c4e40 RSI: ffffffff8bc08340 RDI: ffffffff8bc08300
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff520017c7ec8 R12: ffffea00022c4e40
R13: dffffc0000000000 R14: ffff8880b8740b40 R15: 0000000000000000
 __free_frozen_pages+0x67f/0xd30 mm/page_alloc.c:2970
 __folio_put+0x21b/0x2c0 mm/swap.c:112
 af_alg_free_areq_sgls crypto/af_alg.c:793 [inline]
 af_alg_free_resources+0x55f/0x750 crypto/af_alg.c:1130
 _skcipher_recvmsg crypto/algif_skcipher.c:208 [inline]
 skcipher_recvmsg+0xc2c/0x11d0 crypto/algif_skcipher.c:221
 sock_recvmsg_nosec net/socket.c:1078 [inline]
 sock_recvmsg+0x22c/0x270 net/socket.c:1100
 ____sys_recvmsg+0x1c9/0x460 net/socket.c:2812
 ___sys_recvmsg+0x1b5/0x510 net/socket.c:2854
 __sys_recvmsg net/socket.c:2887 [inline]
 __do_sys_recvmsg net/socket.c:2893 [inline]
 __se_sys_recvmsg net/socket.c:2890 [inline]
 __x64_sys_recvmsg+0x198/0x260 net/socket.c:2890
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa279b8f749
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:00007fa27aa35038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fa279de6090 RCX: 00007fa279b8f749
RDX: 0000000000000000 RSI: 00002000000005c0 RDI: 0000000000000008
RBP: 00007fa279c13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa279de6128 R14: 00007fa279de6090 R15: 00007ffc83b2fc88
 </TASK>
sched: DL replenish lagged too much