rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=216c/1/0x4000000000000000 softirq=41368/47272 fqs=0
rcu: 	(t=10501 jiffies g=34209 q=282 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10500 jiffies! g34209 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=16849
rcu: rcu_preempt kthread starved for 10501 jiffies! g34209 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:28280 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0xf43/0x5890 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6856
 schedule_timeout+0x124/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2226
 kthread+0x3af/0x750 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 15060 Comm: syz.3.911 Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:124 [inline]
RIP: 0010:lock_acquire.part.0+0xd3/0x380 kernel/locking/lockdep.c:5847
Code: 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 80 02 00 00 8b 95 ec 0a 00 00 85 d2 0f 85 d5 00 00 00 44 89 44 24 04 89 0c 24 9c 5d <fa> 48 c7 c7 60 ef 6c 8b e8 40 43 bf 09 44 89 e2 44 89 f6 4c 89 ef
RSP: 0018:ffffc90000007c98 EFLAGS: 00000046
RAX: 0000000000000007 RBX: 1ffff92000000f94 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888053812f2c
RBP: 0000000000000046 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff90621517 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8e1bcbc0 R14: 0000000000000000 R15: 0000000000000000
FS:  00007ff9ca4846c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f818ff8 CR3: 000000005a65c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 advance_sched+0x67f/0xc60 net/sched/sch_taprio.c:985
 __run_hrtimer kernel/time/hrtimer.c:1738 [inline]
 __hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1802
 hrtimer_interrupt+0x392/0x8e0 kernel/time/hrtimer.c:1864
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:trace_kfree include/trace/events/kmem.h:94 [inline]
RIP: 0010:kfree+0x54/0x4d0 mm/slub.c:4744
Code: 31 c0 48 8b 75 08 0f 1f 44 00 00 49 c7 c4 0c d9 03 00 65 41 8b 04 24 83 f8 07 0f 87 bb 02 00 00 89 c0 48 0f a3 05 8c ff 4f 0e <0f> 82 01 02 00 00 48 83 fb 10 0f 86 12 01 00 00 48 89 df e8 f4 ac
RSP: 0018:ffffc9000214faf0 EFLAGS: 00000297
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000ccc4000
RDX: 0000000000080000 RSI: ffffffff8927de62 RDI: 0000000000000000
RBP: ffffc9000214fb50 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000000003d90c
R13: 0000000000000002 R14: ffffc9000214fd98 R15: 0000000020317980
 ___sys_recvmsg+0x122/0x1a0 net/socket.c:2831
 do_recvmmsg+0x2f8/0x740 net/socket.c:2925
 __sys_recvmmsg net/socket.c:2999 [inline]
 __do_sys_recvmmsg net/socket.c:3022 [inline]
 __se_sys_recvmmsg net/socket.c:3015 [inline]
 __x64_sys_recvmmsg+0x239/0x290 net/socket.c:3015
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff9c958cda9
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:00007ff9ca484038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007ff9c97a5fa0 RCX: 00007ff9c958cda9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007ff9c960e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff9c97a5fa0 R15: 00007ffcd13cc928
 </TASK>
CPU: 1 UID: 0 PID: 15072 Comm: syz.4.912 Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:write_comp_data+0x8b/0x90 kernel/kcov.c:272
Code: 00 00 4a 8d 34 dd 28 00 00 00 48 39 f2 72 1b 48 83 c7 01 48 89 38 4c 89 44 30 e0 4c 89 4c 30 e8 4c 89 54 30 f0 4a 89 4c d8 20 <c3> cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3
RSP: 0018:ffffc900041a7c08 EFLAGS: 00000297
RAX: 0000000000000002 RBX: ffff8880b86469c0 RCX: ffffffff81ada9ca
RDX: ffff88802f682440 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000002 R12: ffffed10170c8d39
R13: 0000000000000001 R14: ffff8880b873fe40 R15: ffff8880b86469c8
FS:  00007ff1cb2606c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f816ff8 CR3: 000000004ee08000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 csd_lock_wait kernel/smp.c:340 [inline]
 smp_call_function_many_cond+0x4ea/0x12c0 kernel/smp.c:885
 clock_was_set+0x646/0x850 kernel/time/hrtimer.c:963
 do_settimeofday64+0x305/0x4c0 kernel/time/timekeeping.c:1381
 do_sys_settimeofday64+0x1dc/0x260 kernel/time/time.c:195
 __do_sys_clock_settime kernel/time/posix-timers.c:1135 [inline]
 __se_sys_clock_settime kernel/time/posix-timers.c:1119 [inline]
 __x64_sys_clock_settime+0x1bf/0x2a0 kernel/time/posix-timers.c:1119
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff1ca38cda9
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:00007ff1cb260038 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007ff1ca5a5fa0 RCX: 00007ff1ca38cda9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007ff1ca40e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff1ca5a5fa0 R15: 00007fff03e19cd8
 </TASK>