rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=15029, q=251 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294960108-4294949606), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g15029 f0x2 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:28440 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x1139/0x6150 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6960
 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </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: 6467 Comm: syz.0.16 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:146 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:172 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:191 [inline]
RIP: 0010:kasan_check_range+0xe5/0x1b0 mm/kasan/generic.c:200
Code: 83 38 00 74 ed 48 8d 50 08 eb 0d 48 83 c0 01 48 39 d0 0f 84 90 00 00 00 80 38 00 74 ee 48 89 c2 b8 01 00 00 00 48 85 d2 74 1e <41> 83 e2 07 49 39 d1 75 0a b8 01 00 00 00 45 3a 11 7c 0b 44 89 c2
RSP: 0018:ffffc90000007d88 EFLAGS: 00000082
RAX: 0000000000000001 RBX: fffff52000000fbb RCX: ffffffff819a443c
RDX: fffff52000000fba RSI: 0000000000000004 RDI: ffffc90000007dd0
RBP: fffff52000000fba R08: 0000000000000001 R09: fffff52000000fba
R10: ffffc90000007dd3 R11: ffff8880269554b0 R12: ffff8880b8428448
R13: ffff8880b8428450 R14: ffff888075815300 R15: 0000000000000001
FS:  00007f39c267d6c0(0000) GS:ffff8881248f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f39c265bf98 CR3: 00000000762dc000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 instrument_read_write include/linux/instrumented.h:54 [inline]
 atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1301 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
 do_raw_spin_lock+0x12c/0x2b0 kernel/locking/spinlock_debug.c:116
 __run_hrtimer kernel/time/hrtimer.c:1781 [inline]
 __hrtimer_run_queues+0x2bc/0xc40 kernel/time/hrtimer.c:1841
 hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1903
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x3c0 arch/x86/kernel/apic/apic.c:1062
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lockdep_unregister_key+0xe9/0x140 kernel/locking/lockdep.c:6616
Code: 48 89 ef e8 89 ee ff ff 48 83 2d d9 02 39 14 01 89 c3 e8 0a ef ff ff 9c 58 f6 c4 02 75 52 41 f7 c4 00 02 00 00 74 01 fb 84 db <75> 1b 5b 5d 41 5c e9 4c ad 0a 00 8b 05 ba 5d ef 0e 31 db 85 c0 74
RSP: 0018:ffffc9000219f308 EFLAGS: 00000246
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8dbbe5ad RDI: ffffffff8bf2b400
RBP: ffffffff97398b48 R08: 00000000000061c2 R09: ffffffff95d34e64
R10: 0000000000000002 R11: ffff8880269554b0 R12: 0000000000000246
R13: ffff888035b60000 R14: ffff888075815000 R15: ffff888035b60000
 __qdisc_destroy+0x11a/0x4a0 net/sched/sch_generic.c:1079
 qdisc_put+0xab/0xe0 net/sched/sch_generic.c:1105
 taprio_attach+0x1fc/0x370 net/sched/sch_taprio.c:2161
 qdisc_graft+0xe3f/0x17c0 net/sched/sch_api.c:1162
 __tc_modify_qdisc net/sched/sch_api.c:1761 [inline]
 tc_modify_qdisc+0xfb3/0x2230 net/sched/sch_api.c:1817
 rtnetlink_rcv_msg+0x3c9/0xe90 net/core/rtnetlink.c:6967
 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x5aa/0x870 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8c8/0xdd0 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg net/socket.c:742 [inline]
 ____sys_sendmsg+0xa5d/0xc30 net/socket.c:2592
 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2646
 __sys_sendmsg+0x16d/0x220 net/socket.c:2678
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f39c178cde9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f39c267d038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f39c19a5fa0 RCX: 00007f39c178cde9
RDX: 0000000000000000 RSI: 00004000000007c0 RDI: 0000000000000004
RBP: 00007f39c180e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f39c19a5fa0 R15: 00007ffd2398c068
 </TASK>