rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (0 ticks this GP) idle=9d9c/1/0x4000000000000000 softirq=78778/78778 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P26688/1:b..l
rcu: 	(detected by 0, t=10506 jiffies, g=135085, q=121 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 26687 Comm: syz-executor.2 Not tainted 6.7.0-rc3-next-20231130-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:advance_sched+0x4c0/0xc60 net/sched/sch_taprio.c:968
Code: ff df 80 3c 01 00 0f 85 95 07 00 00 49 03 af 30 01 00 00 48 8b 04 24 49 89 af 28 01 00 00 48 8b 98 50 01 00 00 e9 0b fe ff ff <4c> 8b 6c 24 60 4c 8b 7c 24 08 4c 8b 74 24 68 e8 3c 76 df f8 48 83
RSP: 0018:ffffc900001f0d80 EFLAGS: 00000046
RAX: 0000000000010002 RBX: 184e04cc6a1f6188 RCX: ffffffff88a8ae1c
RDX: ffff88803dba3b80 RSI: 0000000000000002 RDI: 0000000000000004
RBP: ffff88804e2c1010 R08: 0000000000000004 R09: 0000000000000002
R10: 0000000000000002 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000001 R14: 0000000000000002 R15: 000000007eb24548
FS:  00007fe3d87a96c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3172b000 CR3: 0000000037438000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x20c/0xc20 kernel/time/hrtimer.c:1752
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1814
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1065 [inline]
 __sysvec_apic_timer_interrupt+0x10c/0x410 arch/x86/kernel/apic/apic.c:1082
 sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 f6 27 de f6 48 89 df e8 be 9f de f6 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f <bf> 01 00 00 00 e8 b5 49 d0 f6 65 8b 05 16 63 79 75 85 c0 74 12 5b
RSP: 0018:ffffc9001615fa40 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffff88823bd8c088 RCX: 1ffffffff1e728c1
RDX: 0000000000000000 RSI: ffffffff8accb720 RDI: ffffffff8b2f16e0
RBP: 0000000000000283 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f3978d7 R11: 0000000000000000 R12: dffffc0000000000
R13: 19792a00e40cfc3b R14: 179c53b0e40cfc3b R15: ffff88823bd8c088
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 timerfd_clock_was_set+0x164/0x310 fs/timerfd.c:113
 clock_was_set+0x67c/0x850 kernel/time/hrtimer.c:982
 timekeeping_inject_offset+0x4d1/0x640 kernel/time/timekeeping.c:1395
 do_adjtimex+0x373/0xaa0 kernel/time/timekeeping.c:2444
 do_clock_adjtime kernel/time/posix-timers.c:1159 [inline]
 __do_sys_clock_adjtime+0x173/0x280 kernel/time/posix-timers.c:1171
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7fe3d7a7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe3d87a90c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007fe3d7b9c050 RCX: 00007fe3d7a7cae9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007fe3d7ac847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fe3d7b9c050 R15: 00007fff292e59e8
 </TASK>
task:syz-executor.2  state:R  running task     stack:26672 pid:26688 tgid:26688 ppid:26687  flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5399 [inline]
 __schedule+0xf15/0x5c00 kernel/sched/core.c:6726
 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6903
 preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
 __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
 _raw_spin_unlock+0x3a/0x40 kernel/locking/spinlock.c:186
 spin_unlock include/linux/spinlock.h:391 [inline]
 zap_pte_range mm/memory.c:1539 [inline]
 zap_pmd_range mm/memory.c:1587 [inline]
 zap_pud_range mm/memory.c:1616 [inline]
 zap_p4d_range mm/memory.c:1637 [inline]
 unmap_page_range+0x13ef/0x2b60 mm/memory.c:1658
 unmap_single_vma+0x194/0x2b0 mm/memory.c:1704
 unmap_vmas+0x22f/0x490 mm/memory.c:1748
 exit_mmap+0x1c1/0xb60 mm/mmap.c:3274
 __mmput+0x12a/0x4d0 kernel/fork.c:1341
 mmput+0x62/0x70 kernel/fork.c:1363
 exit_mm kernel/exit.c:567 [inline]
 do_exit+0x9a1/0x2ad0 kernel/exit.c:858
 __do_sys_exit kernel/exit.c:988 [inline]
 __se_sys_exit kernel/exit.c:986 [inline]
 __x64_sys_exit+0x42/0x50 kernel/exit.c:986
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x62/0x6a
RIP: 0033:0x7fe3d7a7cae9
RSP: 002b:0000000020003318 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007fe3d7a7cae9
RDX: 00007fe3d7a7cae9 RSI: 0000000020003340 RDI: 000000000000000b
RBP: 00007fe3d7ac847a R08: 0000000020003980 R09: 0000000000000000
R10: 0000000020003980 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fe3d7b9c050 R15: 00007fff292e59e8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10505 jiffies! g135085 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=250942
rcu: rcu_preempt kthread starved for 10506 jiffies! g135085 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:27888 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5399 [inline]
 __schedule+0xf15/0x5c00 kernel/sched/core.c:6726
 __schedule_loop kernel/sched/core.c:6801 [inline]
 schedule+0xe7/0x270 kernel/sched/core.c:6816
 schedule_timeout+0x136/0x290 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1631
 rcu_gp_kthread+0x245/0x380 kernel/rcu/tree.c:1830
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>