rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10528 ticks this GP) idle=5cf4/1/0x4000000000000000 softirq=110006/110007 fqs=5244
rcu: hardirqs softirqs csw/system
rcu: number: 6031 0 0
rcu: cputime: 142 52347 8 ==> 52510(ms)
rcu: (t=10503 jiffies g=68621 q=1874 ncpus=2)
CPU: 0 UID: 0 PID: 12532 Comm: syz.2.2066 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x5d/0x70 kernel/kcov.c:235
Code: 58 16 00 00 83 fa 02 75 21 48 8b 91 60 16 00 00 48 8b 32 48 8d 7e 01 8b 89 5c 16 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 08 <e9> 3e 90 8e 09 cc 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90
RSP: 0018:ffffc90000007b40 EFLAGS: 00000246
RAX: ffffffff8965b0c0 RBX: 0000000000000000 RCX: ffff88802f5a3c80
RDX: 0000000000000100 RSI: 0000000000000010 RDI: 000000000000000b
RBP: 1ffff110065c3672 R08: 0000000000000000 R09: ffffffff896509a6
R10: 0000000000000001 R11: ffffffff89586210 R12: dffffc0000000000
R13: ffff888032e1b394 R14: 0000000000000010 R15: 0000000000000002
FS: 00007fa6823bc6c0(0000) GS:ffff888125d12000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3c141f CR3: 0000000057a92000 CR4: 00000000003526f0
Call Trace:
<IRQ>
taprio_dequeue_tc_priority+0x2d0/0x750 net/sched/sch_taprio.c:802
taprio_dequeue+0x186/0x550 net/sched/sch_taprio.c:-1
dequeue_skb net/sched/sch_generic.c:294 [inline]
qdisc_restart net/sched/sch_generic.c:399 [inline]
__qdisc_run+0x239/0x15f0 net/sched/sch_generic.c:417
qdisc_run+0xc2/0x230 include/net/pkt_sched.h:126
net_tx_action+0x7c9/0x980 net/core/dev.c:5749
handle_softirqs+0x283/0x870 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5872
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 eb fc f3 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9001a0a75d0 EFLAGS: 00000206
RAX: 5fe7b8eb4db3d700 RBX: 0000000000000000 RCX: 5fe7b8eb4db3d700
RDX: 0000000000000000 RSI: ffffffff8d9d1601 RDI: ffffffff8bc074e0
RBP: ffffffff89f631c7 R08: 0000000000000000 R09: ffffffff89f631c7
R10: dffffc0000000000 R11: fffffbfff1f3c1ef R12: 0000000000000000
R13: ffff88802cee86d8 R14: 0000000000000001 R15: 0000000000000246
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
unix_stream_read_generic+0xbd7/0x2470 net/unix/af_unix.c:3104
unix_stream_recvmsg+0x15d/0x1b0 net/unix/af_unix.c:3172
sock_recvmsg_nosec net/socket.c:1078 [inline]
sock_recvmsg+0x22c/0x270 net/socket.c:1100
____sys_recvmsg+0x1c9/0x460 net/socket.c:2850
___sys_recvmsg+0x1b5/0x510 net/socket.c:2892
__sys_recvmsg net/socket.c:2925 [inline]
__do_sys_recvmsg net/socket.c:2931 [inline]
__se_sys_recvmsg net/socket.c:2928 [inline]
__x64_sys_recvmsg+0x198/0x260 net/socket.c:2928
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa68158eec9
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:00007fa6823bc038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fa6817e6180 RCX: 00007fa68158eec9
RDX: 0000000040002002 RSI: 0000200000000000 RDI: 0000000000000008
RBP: 00007fa681611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa6817e6218 R14: 00007fa6817e6180 R15: 00007ffeb19dc808
</TASK>
sched: DL replenish lagged too much