rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P9954/1:b..l P9945/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=61297, q=641 ncpus=2)
task:syz.2.892 state:R running task stack:22736 pid:9945 tgid:9943 ppid:9577 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5763
Code: 2b 00 74 08 4c 89 f7 e8 ea e0 87 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90008ede7e0 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920011dbd08 RCX: 38aaf7bdfd69e000
RDX: dffffc0000000000 RSI: ffffffff8beae6e0 RDI: ffffffff8c3fba80
RBP: ffffc90008ede940 R08: ffffffff93fa6847 R09: 1ffffffff27f4d08
R10: dffffc0000000000 R11: fffffbfff27f4d09 R12: 1ffff920011dbd04
R13: dffffc0000000000 R14: ffffc90008ede840 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
folio_evictable+0x37/0x310 mm/internal.h:369
shrink_folio_list+0x942/0x8ee0 mm/vmscan.c:1071
reclaim_folio_list mm/vmscan.c:2120 [inline]
reclaim_pages+0x921/0xc70 mm/vmscan.c:2156
madvise_cold_or_pageout_pte_range+0x2964/0x32a0 mm/madvise.c:550
walk_pmd_range mm/pagewalk.c:104 [inline]
walk_pud_range mm/pagewalk.c:176 [inline]
walk_p4d_range mm/pagewalk.c:209 [inline]
walk_pgd_range+0xba1/0x1810 mm/pagewalk.c:244
__walk_page_range+0x132/0x720 mm/pagewalk.c:346
walk_page_range+0x58f/0x7c0 mm/pagewalk.c:472
madvise_pageout_page_range mm/madvise.c:609 [inline]
madvise_pageout mm/madvise.c:636 [inline]
madvise_vma_behavior mm/madvise.c:1042 [inline]
madvise_walk_vmas mm/madvise.c:1271 [inline]
do_madvise+0x3384/0x4760 mm/madvise.c:1467
__do_sys_madvise mm/madvise.c:1484 [inline]
__se_sys_madvise mm/madvise.c:1482 [inline]
__x64_sys_madvise+0xa6/0xc0 mm/madvise.c:1482
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: 0033:0x7f1c6157cef9
RSP: 002b:00007f1c60fff038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007f1c61735f80 RCX: 00007f1c6157cef9
RDX: 0000000000000015 RSI: 0000000000600000 RDI: 0000000020000000
RBP: 00007f1c615ef046 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f1c61735f80 R15: 00007ffc7fa5ce48
task:syz.3.885 state:R running task stack:26000 pid:9954 tgid:9923 ppid:9451 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6708
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6732
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x130/0x140 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
__wake_up_common_lock+0x18c/0x1e0 kernel/sched/wait.c:108
sock_def_readable+0x20f/0x5b0 net/core/sock.c:3374
tcp_data_queue+0x20fd/0x76c0 net/ipv4/tcp_input.c:5283
tcp_rcv_established+0xfba/0x2020 net/ipv4/tcp_input.c:6230
tcp_v4_do_rcv+0x96d/0xc70 net/ipv4/tcp_ipv4.c:1911
sk_backlog_rcv include/net/sock.h:1111 [inline]
__release_sock+0x214/0x350 net/core/sock.c:3004
release_sock+0x61/0x1f0 net/core/sock.c:3558
sk_stream_wait_memory+0x762/0xfa0 net/core/stream.c:145
tcp_sendmsg_locked+0x1471/0x4e10 net/ipv4/tcp.c:1312
tcp_sendmsg+0x30/0x50 net/ipv4/tcp.c:1354
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x1a6/0x270 net/socket.c:745
__sys_sendto+0x3a4/0x4f0 net/socket.c:2204
__do_sys_sendto net/socket.c:2216 [inline]
__se_sys_sendto net/socket.c:2212 [inline]
__x64_sys_sendto+0xde/0x100 net/socket.c:2212
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: 0033:0x7f81ce77cef9
RSP: 002b:00007f81cf641038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f81ce936058 RCX: 00007f81ce77cef9
RDX: 00000000fffffea5 RSI: 0000000020000480 RDI: 0000000000000003
RBP: 00007f81ce7ef046 R08: 0000000000000000 R09: 00000000fffffcef
R10: 000000000000c000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f81ce936058 R15: 00007ffff6a40b78
rcu: rcu_preempt kthread starved for 10582 jiffies! g61297 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
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:26448 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2581
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2034
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2236
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:106 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:111