rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P19126/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=155109, q=386 ncpus=2)
task:syz.0.2796      state:R  running task     stack:25696 pid:19126 tgid:19119 ppid:18182  flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5248 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6600
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6922
 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:__sanitizer_cov_trace_pc+0x46/0x70 kernel/kcov.c:212
Code: ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2
RSP: 0018:ffffc90003f1f3b8 EFLAGS: 00000246
RAX: ffffffff81e38dfa RBX: 0000000000000001 RCX: ffff888026289e00
RDX: ffffc9000a002000 RSI: 00000000000061ea RDI: ffffffff8c207ec0
RBP: ffffc90003f1f6b0 R08: ffffffff81e38de8 R09: 1ffff11005e16878
R10: dffffc0000000000 R11: ffffed1005e16879 R12: 00000000129cc225
R13: 0000000000000000 R14: 0000000000000001 R15: 1ffff920007e3eb0
 rcu_read_unlock include/linux/rcupdate.h:874 [inline]
 pte_unmap include/linux/pgtable.h:115 [inline]
 do_anonymous_page mm/memory.c:4615 [inline]
 do_pte_missing mm/memory.c:3946 [inline]
 handle_pte_fault+0x507a/0x6eb0 mm/memory.c:5523
 __handle_mm_fault mm/memory.c:5666 [inline]
 handle_mm_fault+0x1021/0x1990 mm/memory.c:5831
 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:fault_in_readable+0x165/0x2b0 mm/gup.c:2244
Code: b4 ff 4c 8d b3 ff 0f 00 00 48 89 d8 4d 01 e6 49 81 e6 00 f0 ff ff 49 39 c6 72 6b e8 15 b5 b4 ff 4c 39 f3 74 6e 4c 89 64 24 10 <44> 8a 23 43 0f b6 04 2f 84 c0 75 18 44 88 64 24 40 48 81 c3 00 10
RSP: 0018:ffffc90003f1fa20 EFLAGS: 00050287
RAX: ffffffff81decef7 RBX: 00000000200f6000 RCX: 0000000000040000
RDX: ffffc9000a002000 RSI: 000000000000618c RDI: 000000000000618d
RBP: ffffc90003f1fad8 R08: ffffffff81dece68 R09: ffffffff84ad12d9
R10: 0000000000000002 R11: ffff888026289e00 R12: 0000000000200000
R13: dffffc0000000000 R14: 0000000020201000 R15: 1ffff920007e3f4c
 fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94
 generic_perform_write+0x29f/0x840 mm/filemap.c:4009
 shmem_file_write_iter+0xfc/0x120 mm/shmem.c:3085
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 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: 0033:0x7fe677b75bd9
RSP: 002b:00007fe6789b3048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fe677d04110 RCX: 00007fe677b75bd9
RDX: 000000000208e24b RSI: 00000000200006c0 RDI: 000000000000000a
RBP: 00007fe677be4a98 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fe677d04110 R15: 00007ffe0c6eb038
 </TASK>
rcu: rcu_preempt kthread starved for 10406 jiffies! g155109 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:26128 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5248 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6600
 __schedule_loop kernel/sched/core.c:6677 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6692
 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.10.0-rc6-next-20240703-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:113
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 40 d7 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d 85 c7 98 00 f3 0f 1e fa fb f4 <fa> c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d08 EFLAGS: 00000246
RAX: ffff8880176f0000 RBX: ffff888015110864 RCX: 000000000264bc59
RDX: 0000000000000001 RSI: ffff888015110800 RDI: ffff888015110864
RBP: 000000000003a6b8 R08: ffff8880b9537c9b R09: 1ffff110172a6f93
R10: dffffc0000000000 R11: ffffffff8b915050 R12: ffff88801ab11000
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8ead8980
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe786947880 CR3: 000000007b1bc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707
 cpuidle_enter_state+0x112/0x480 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x5d/0xa0 drivers/cpuidle/cpuidle.c:388
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:230 [inline]
 do_idle+0x375/0x5d0 kernel/sched/idle.c:326
 cpu_startup_entry+0x42/0x60 kernel/sched/idle.c:424
 start_secondary+0x100/0x100 arch/x86/kernel/smpboot.c:313
 common_startup_64+0x13e/0x147
 </TASK>