rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=9814/1/0x4000000000000000 softirq=70781/70787 fqs=5203 rcu: hardirqs softirqs csw/system rcu: number: 15 0 0 rcu: cputime: 173 52326 16 ==> 52520(ms) rcu: (t=10503 jiffies g=53969 q=1460 ncpus=2) CPU: 0 UID: 0 PID: 13157 Comm: syz-executor Not tainted 6.14.0-rc1-syzkaller-00187-g7bca2b2d5fcc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:qdisc_peek_head+0x0/0x40 include/net/sch_generic.h:1114 Code: c1 38 c1 0f 8c c3 fe ff ff 4c 89 e7 e8 49 fa 3c f8 e9 b6 fe ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 53 48 89 fb e8 13 62 d6 f7 48 81 c3 d8 00 00 00 48 89 RSP: 0018:ffffc90000007ab8 EFLAGS: 00000246 RAX: 1ffffffff2037ba1 RBX: ffffffff901bdd08 RCX: dffffc0000000000 RDX: ffff88802f919e00 RSI: 0000000000000000 RDI: ffff8880206b9800 RBP: ffff8880206b9800 R08: ffffffff89f71ebf R09: 1ffffffff285f308 R10: dffffc0000000000 R11: ffffffff89e8fc00 R12: 0000000000000002 R13: ffff88807ea82400 R14: 0000000000000006 R15: ffff88805e78c000 FS: 0000555578bfc500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000005c6fa000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: taprio_dequeue_from_txq+0x17f/0x930 net/sched/sch_taprio.c:720 taprio_dequeue_tc_priority+0x1b5/0x7a0 net/sched/sch_taprio.c:787 taprio_dequeue+0x186/0x550 dequeue_skb net/sched/sch_generic.c:293 [inline] qdisc_restart net/sched/sch_generic.c:398 [inline] __qdisc_run+0x272/0x2180 net/sched/sch_generic.c:416 qdisc_run+0xda/0x270 include/net/pkt_sched.h:127 net_tx_action+0x896/0xa50 net/core/dev.c:5485 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 __do_softirq kernel/softirq.c:595 [inline] invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662 irq_exit_rcu+0x9/0x30 kernel/softirq.c:678 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_release+0x11/0xa30 kernel/locking/lockdep.c:5859 Code: 65 16 8b 00 e9 99 f5 ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 <48> 83 e4 e0 48 81 ec 00 01 00 00 49 89 f5 48 89 7c 24 18 65 48 8b RSP: 0018:ffffc90003467670 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000cc0 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: ffffffff821a8edf RDI: ffffffff8ea392e0 RBP: ffffc90003467698 R08: ffffffff901b5377 R09: 1ffffffff2036a6e R10: dffffc0000000000 R11: fffffbfff2036a6f R12: 0000000000000000 R13: dffffc0000000000 R14: ffff88801de828c0 R15: 0000000000000cc0 might_alloc include/linux/sched/mm.h:319 [inline] slab_pre_alloc_hook mm/slub.c:4066 [inline] slab_alloc_node mm/slub.c:4144 [inline] kmem_cache_alloc_node_noprof+0x4f/0x380 mm/slub.c:4216 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:668 alloc_skb include/linux/skbuff.h:1331 [inline] nlmsg_new include/net/netlink.h:1018 [inline] netlink_ack+0x145/0xa50 net/netlink/af_netlink.c:2480 netlink_rcv_skb+0x262/0x430 net/netlink/af_netlink.c:2549 netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1348 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1892 sock_sendmsg_nosec net/socket.c:713 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:728 __sys_sendto+0x363/0x4c0 net/socket.c:2182 __do_sys_sendto net/socket.c:2189 [inline] __se_sys_sendto net/socket.c:2185 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2185 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fba7298ec7c Code: 2a 5f 02 00 44 8b 4c 24 2c 4c 8b 44 24 20 89 c5 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 34 89 ef 48 89 44 24 08 e8 70 5f 02 00 48 8b RSP: 002b:00007ffea5f96890 EFLAGS: 00000293 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fba736d4620 RCX: 00007fba7298ec7c RDX: 0000000000000028 RSI: 00007fba736d4670 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007ffea5f968e4 R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003 R13: 0000000000000000 R14: 00007fba736d4670 R15: 0000000000000000 sched: DL replenish lagged too much