syzbot

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-...D } 2660 jiffies s: 45537 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 11610 Comm: syz.4.1115 Not tainted 6.11.0-syzkaller-11624-ge477dba5442c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
RIP: 0010:rcu_is_watching+0xd/0xc0 kernel/rcu/tree.c:737
Code: 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 53 65 ff 05 eb fc 90 7e <e8> 2e 14 ad 09 48 c7 c3 28 81 03 00 83 f8 07 89 c5 0f 87 82 00 00
RSP: 0018:ffffc90000007d68 EFLAGS: 00000082
RAX: 0000000080010001 RBX: 0000000000000001 RCX: ffffffff892f8b5f
RDX: ffff88802d573c00 RSI: ffffffff892f8de4 RDI: 0000000000000005
RBP: ffff88806b828410 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000002
R13: ffff88806b828400 R14: ffff88806751f340 R15: ffff88806b829400
FS:  00007fd9471026c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002001b030 CR3: 000000006f1bc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_read_lock include/linux/rcupdate.h:850 [inline]
 advance_sched+0x919/0xc60 net/sched/sch_taprio.c:985
 __run_hrtimer kernel/time/hrtimer.c:1691 [inline]
 __hrtimer_run_queues+0x20c/0xcc0 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1026 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1043
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1037 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1037
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 86 94 47 f6 48 89 df e8 ae 11 48 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 b5 37 39 f6 65 8b 05 c6 76 e1 74 85 c0 74 16 5b
RSP: 0018:ffffc90004a77718 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffff888022385bc0 RCX: 1ffffffff2dcb534
RDX: 0000000000000000 RSI: ffffffff8b6ccc40 RDI: ffffffff8bd196e0
RBP: 0000000000000246 R08: 0000000000000001 R09: fffffbfff2dc2b9d
R10: ffffffff96e15cef R11: 0000000000000000 R12: ffff888022385ba8
R13: ffff8880296e9a00 R14: 0000000000000246 R15: ffffc90004a778b8
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 __skb_try_recv_datagram+0x177/0x4f0 net/core/datagram.c:266
 __unix_dgram_recvmsg+0x1d1/0xe50 net/unix/af_unix.c:2435
 unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2537
 sock_recvmsg_nosec net/socket.c:1051 [inline]
 ____sys_recvmsg+0x5f8/0x6b0 net/socket.c:2819
 ___sys_recvmsg+0x115/0x1a0 net/socket.c:2863
 do_recvmmsg+0x2ba/0x750 net/socket.c:2957
 __sys_recvmmsg net/socket.c:3036 [inline]
 __do_sys_recvmmsg net/socket.c:3059 [inline]
 __se_sys_recvmmsg net/socket.c:3052 [inline]
 __x64_sys_recvmmsg+0x239/0x290 net/socket.c:3052
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd94637df39
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:00007fd947102038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fd946535f80 RCX: 00007fd94637df39
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fd9463f0216 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd946535f80 R15: 00007ffe9d897918
 </TASK>