rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P20521/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=165737, q=9 ncpus=1)
task:syz.3.3196      state:R  running task     stack:24984 pid:20521 tgid:20518 ppid:16980  task_flags:0x400140 flags:0x00080003
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x125c/0x6730 kernel/sched/core.c:7234
 preempt_schedule_irq+0x50/0x90 kernel/sched/core.c:7556
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x205/0xa00 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__sanitizer_cov_trace_pc+0x54/0x70 kernel/kcov.c:222
Code: c3 cc cc cc cc 8b 82 24 17 00 00 85 c0 74 f1 8b 82 f8 16 00 00 83 f8 02 75 e6 48 8b 8a 00 17 00 00 8b 92 fc 16 00 00 48 8b 01 <48> 83 c0 01 48 39 d0 73 cd 48 89 01 48 89 34 c1 c3 cc cc cc cc 0f
RSP: 0018:ffffc900052a79b8 EFLAGS: 00000246
RAX: 000000000007ffff RBX: ffff888029479208 RCX: ffffc90011dba000
RDX: 0000000000080000 RSI: ffffffff8b921be1 RDI: ffff88802a830000
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000004
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: 000000000000000f R14: dffffc0000000000 R15: 000000110c22ffff
 ma_slots lib/maple_tree.c:690 [inline]
 mtree_lookup_walk lib/maple_tree.c:2986 [inline]
 mtree_load+0x571/0xa90 lib/maple_tree.c:5668
 vma_lookup include/linux/mm.h:4238 [inline]
 do_pages_stat_array mm/migrate.c:2460 [inline]
 do_pages_stat+0x3d1/0x7f0 mm/migrate.c:2530
 kernel_move_pages+0xf11/0x14a0 mm/migrate.c:2616
 __do_sys_move_pages mm/migrate.c:2627 [inline]
 __se_sys_move_pages mm/migrate.c:2622 [inline]
 __x64_sys_move_pages+0xe0/0x1c0 mm/migrate.c:2622
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbcedf9ce59
RSP: 002b:00007fbceed97028 EFLAGS: 00000246 ORIG_RAX: 0000000000000117
RAX: ffffffffffffffda RBX: 00007fbcee216090 RCX: 00007fbcedf9ce59
RDX: 0000000000000000 RSI: 0002000000000003 RDI: 0000000000000001
RBP: 00007fbcee032e6f R08: 0000000000000000 R09: 8000400000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbcee216128 R14: 00007fbcee216090 R15: 00007ffed223aca8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g165737 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=46894
rcu: rcu_preempt kthread starved for 10502 jiffies! g165737 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27672 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x125c/0x6730 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0xdd/0x2c0 kernel/sched/core.c:7326
 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1a9/0x900 kernel/rcu/tree.c:2123
 rcu_gp_kthread+0x179/0x230 kernel/rcu/tree.c:2325
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 20638 Comm: syz.2.3223 Tainted: G     U       L      syzkaller #0 PREEMPT(full) 
Tainted: [U]=USER, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:lock_acquire+0x7b/0x370 kernel/locking/lockdep.c:5872
Code: 35 ee 85 f7 0e 85 f6 0f 85 c7 00 00 00 48 8b 44 24 30 65 48 2b 05 9d 06 2f 12 0f 85 ec 02 00 00 48 83 c4 38 5b 5d 41 5c 41 5d <41> 5e 41 5f c3 cc cc cc cc 65 8b 05 a9 06 2f 12 83 f8 07 0f 87 86
RSP: 0018:ffffc90003ff6ba8 EFLAGS: 00000286
RAX: 0000000000000000 RBX: ffff888058ab0000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8df333b0 RDI: ffffffff8c1e8f80
RBP: dffffc0000000000 R08: 00000000880883f3 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000000 R12: 1ffff920007fed83
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fc777e946c0(0000) GS:ffff8881242e7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd09ec6003f CR3: 000000005cd5a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 rcu_read_lock include/linux/rcupdate.h:840 [inline]
 tipc_sk_lookup+0xcd/0xa00 net/tipc/socket.c:3003
 tipc_sk_rcv+0x2ee/0x1c80 net/tipc/socket.c:2496
 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x177/0x3c0 net/tipc/node.c:1781
 tipc_sk_rcv+0xaab/0x1c80 net/tipc/socket.c:2505
 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701
 tipc_sk_push_backlog+0x318/0xa00 net/tipc/socket.c:1313
 tipc_sk_filter_connect net/tipc/socket.c:2259 [inline]
 tipc_sk_filter_rcv+0x95d/0x3250 net/tipc/socket.c:2368
 tipc_sk_enqueue net/tipc/socket.c:2449 [inline]
 tipc_sk_rcv+0xe90/0x1c80 net/tipc/socket.c:2501
 tipc_node_xmit+0x23e/0xfb0 net/tipc/node.c:1701
 tipc_node_xmit_skb net/tipc/node.c:1766 [inline]
 tipc_node_distr_xmit+0x177/0x3c0 net/tipc/node.c:1781
 tipc_sk_backlog_rcv+0x16f/0x1e0 net/tipc/socket.c:2416
 sk_backlog_rcv include/net/sock.h:1190 [inline]
 __release_sock+0x3a2/0x440 net/core/sock.c:3258
 release_sock+0x1e5/0x280 net/core/sock.c:3857
 sockopt_release_sock net/core/sock.c:1163 [inline]
 sk_setsockopt+0x46b/0x5d80 net/core/sock.c:1681
 do_sock_setsockopt+0x193/0x1d0 net/socket.c:2364
 __sys_setsockopt+0x119/0x190 net/socket.c:2393
 __do_sys_setsockopt net/socket.c:2399 [inline]
 __se_sys_setsockopt net/socket.c:2396 [inline]
 __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2396
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x840 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc776f9ce59
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:00007fc777e94028 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007fc777216090 RCX: 00007fc776f9ce59
RDX: 0000000000000021 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007fc777032e6f R08: 0000000000000009 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc777216128 R14: 00007fc777216090 R15: 00007ffe3a46fa68
 </TASK>