rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10469 ticks this GP) idle=9ce4/0/0x1 softirq=0/0 fqs=15
rcu: 	(t=10500 jiffies g=180805 q=1520 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10469 jiffies! g180805 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=174080
rcu: rcu_preempt kthread starved for 10470 jiffies! g180805 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:22592 pid:18    tgid:18    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x16dc/0x5500 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7326
 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123
 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 32479 Comm: syz.0.25066 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:kasan_check_range+0x5/0x2c0 mm/kasan/generic.c:199
Code: 89 df 48 c7 c6 cb 46 af 8d e8 57 32 f9 fe 90 0f 0b cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 55 <41> 57 41 56 41 55 41 54 53 b0 01 48 85 f6 0f 84 ae 01 00 00 4c 8d
RSP: 0018:ffffc9000d377690 EFLAGS: 00000246
RAX: f8a8fd7140800e00 RBX: ffff8880296b3e00 RCX: ffffffff89e7ca47
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88803729cd60
RBP: ffffc9000d3778f0 R08: ffffffff8b44f9a0 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e1c3000 R12: ffff88803729ce28
R13: dffffc0000000000 R14: ffff88803729cd60 R15: 0000000000000000
FS:  00007f8f0c7e56c0(0000) GS:ffff888125c45000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcd4ebde5e8 CR3: 000000007330e000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 instrument_atomic_read include/linux/instrumented.h:82 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 sock_flag include/net/sock.h:1061 [inline]
 unix_stream_read_generic+0x447/0x2310 net/unix/af_unix.c:2957
 unix_stream_recvmsg+0x16b/0x1d0 net/unix/af_unix.c:3158
 sock_recvmsg_nosec net/socket.c:1126 [inline]
 sock_recvmsg+0x196/0x1e0 net/socket.c:1148
 ____sys_recvmsg+0x1f2/0x4b0 net/socket.c:2904
 ___sys_recvmsg+0x213/0x5a0 net/socket.c:2946
 __sys_recvmsg net/socket.c:2979 [inline]
 __do_sys_recvmsg net/socket.c:2985 [inline]
 __se_sys_recvmsg net/socket.c:2982 [inline]
 __x64_sys_recvmsg+0x1b4/0x290 net/socket.c:2982
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8f0e5ade99
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:00007f8f0c7e5028 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f8f0e836090 RCX: 00007f8f0e5ade99
RDX: 0000000000002082 RSI: 0000200000000300 RDI: 0000000000000006
RBP: 00007f8f0e643eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8f0e836128 R14: 00007f8f0e836090 R15: 00007ffd50bfbf18
 </TASK>
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Tainted: G             L      syzkaller #0 PREEMPT_{RT,(full)} 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 0b 71 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 93 d4 26 00 fb f4 <e9> 8c cd 03 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffc900001d7e40 EFLAGS: 00000242
RAX: 0000000002517dd3 RBX: ffffffff81998590 RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d88346d RDI: ffffffff8bca6680
RBP: ffffc900001d7f10 R08: ffff8880b8733d5b R09: 1ffff110170e67ab
R10: dffffc0000000000 R11: ffffed10170e67ac R12: 0000000000000000
R13: 1ffff110039d2000 R14: 1ffff9200003afd0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125d45000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555c5ca38 CR3: 0000000036518000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/kernel/process.c:767 [inline]
 default_idle+0x9/0x20 arch/x86/kernel/process.c:768
 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x2e0/0x540 kernel/sched/idle.c:355
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x157
 </TASK>