rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=33009, q=341 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294967541-4294957038), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10504 jiffies! g33009 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27848 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x15ae/0x4660 kernel/sched/core.c:6701
 schedule+0xbd/0x170 kernel/sched/core.c:6775
 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8720 Comm: syz.3.1098 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:178 [inline]
RIP: 0010:kasan_check_range+0x63/0x290 mm/kasan/generic.c:187
Code: 00 49 89 ff 49 c1 ef 03 49 ba 00 00 00 00 00 fc ff df 4f 8d 1c 17 49 ff c8 4d 89 c1 49 c1 e9 03 48 bb 01 00 00 00 00 fc ff df <4d> 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 3d
RSP: 0018:ffffc900001efc68 EFLAGS: 00000803
RAX: 0000000000000001 RBX: dffffc0000000001 RCX: ffffffff81694434
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff911ef508
RBP: 0000000000000009 R08: ffffffff911ef50f R09: 1ffffffff223dea1
R10: dffffc0000000000 R11: fffffbfff223dea1 R12: 0000000000000200
R13: dffffc0000000000 R14: ffff888022274788 R15: 1ffffffff223dea1
FS:  00007fdcb738d6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002940 CR3: 0000000030bb4000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 hlock_class kernel/locking/lockdep.c:228 [inline]
 mark_lock+0x94/0x320 kernel/locking/lockdep.c:4656
 mark_usage kernel/locking/lockdep.c:4599 [inline]
 __lock_acquire+0xd3e/0x7d80 kernel/locking/lockdep.c:5091
 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754
 seqcount_lockdep_reader_access+0xd1/0x1d0 include/linux/seqlock.h:102
 ktime_get+0x35/0x280 kernel/time/timekeeping.c:846
 hrtimer_forward_now include/linux/hrtimer.h:509 [inline]
 perf_swevent_hrtimer+0x4ae/0x610 kernel/events/core.c:11227
 __run_hrtimer kernel/time/hrtimer.c:1754 [inline]
 __hrtimer_run_queues+0x4e8/0xc10 kernel/time/hrtimer.c:1818
 hrtimer_interrupt+0x39d/0x980 kernel/time/hrtimer.c:1880
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
 __sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0x51/0xc0 arch/x86/kernel/apic/apic.c:1088
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xc0/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 1b a8 c3 f6 65 8b 05 7c 76 6a 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900001f0720 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: 30ca3ae282c89900
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: 0000000000000001
RBP: ffffc900001f07b8 R08: ffffffff911ef5c7 R09: 1ffffffff223deb8
R10: dffffc0000000000 R11: fffffbfff223deb9 R12: dffffc0000000000
R13: ffff88805d4c8000 R14: ffffffff9759f030 R15: 1ffff9200003e0e4
 __debug_check_no_obj_freed lib/debugobjects.c:1054 [inline]
 debug_check_no_obj_freed+0x47b/0x520 lib/debugobjects.c:1075
 free_pages_prepare mm/page_alloc.c:1188 [inline]
 free_unref_page_prepare+0x1ed/0x8f0 mm/page_alloc.c:2366
 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2459
 napi_frag_unref include/linux/skbuff.h:3539 [inline]
 skb_release_data+0x3ca/0x7f0 net/core/skbuff.c:982
 skb_release_all net/core/skbuff.c:1054 [inline]
 __kfree_skb+0x57/0x70 net/core/skbuff.c:1068
 tcp_write_queue_purge+0x140/0x310 net/ipv4/tcp.c:3007
 tcp_done_with_error+0x43/0xc0 net/ipv4/tcp_input.c:4476
 tcp_write_err net/ipv4/tcp_timer.c:72 [inline]
 tcp_write_timeout net/ipv4/tcp_timer.c:281 [inline]
 tcp_retransmit_timer+0x1c94/0x3030 net/ipv4/tcp_timer.c:576
 tcp_write_timer+0x12a/0x280 net/ipv4/tcp_timer.c:709
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x570/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:lock_acquire+0x208/0x420 kernel/locking/lockdep.c:5758
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3c 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 3c 00 00 00 00 43 c7 44 3c 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc9000cd3f260 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 30ca3ae282c89900
RDX: 0000000000000000 RSI: ffffffff8acadd60 RDI: ffffffff8b1d3260
RBP: ffffc9000cd3f380 R08: dffffc0000000000 R09: 1ffffffff223dea2
R10: dffffc0000000000 R11: fffffbfff223dea3 R12: 1ffff920019a7e58
R13: ffffffff8d2280a0 R14: 0000000000000246 R15: dffffc0000000000
 fs_reclaim_acquire+0x98/0x100 mm/page_alloc.c:3617
 might_alloc include/linux/sched/mm.h:303 [inline]
 slab_pre_alloc_hook+0x2a/0x300 mm/slab.h:714
 slab_alloc_node mm/slub.c:3477 [inline]
 __kmem_cache_alloc_node+0x53/0x250 mm/slub.c:3534
 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098
 kmalloc include/linux/slab.h:600 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 bpf_prog_alloc_no_stats+0xd7/0x430 kernel/bpf/core.c:103
 jit_subprogs kernel/bpf/verifier.c:18782 [inline]
 fixup_call_args kernel/bpf/verifier.c:18964 [inline]
 bpf_check+0xb2bd/0xec30 kernel/bpf/verifier.c:20673
 bpf_prog_load+0x10fa/0x1610 kernel/bpf/syscall.c:2753
 __sys_bpf+0x5ba/0x890 kernel/bpf/syscall.c:5478
 __do_sys_bpf kernel/bpf/syscall.c:5582 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5580 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5580
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fdcb659e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdcb738d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fdcb6825fa0 RCX: 00007fdcb659e0d9
RDX: 0000000000000080 RSI: 0000200000000240 RDI: 0000000000000005
RBP: 00007fdcb6635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdcb6826038 R14: 00007fdcb6825fa0 R15: 00007ffe58da3318
 </TASK>