rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6534/1:b..l P6517/1:b..l
rcu: 	(detected by 1, t=10502 jiffies, g=14529, q=328 ncpus=2)
task:syz.4.268       state:R  running task     stack:23728 pid:6517  tgid:6514  ppid:5534   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 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:lock_is_held_type+0x13b/0x190
Code: 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 04 25 28 00 00 00 <48> 3b 44 24 08 75 42 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc9000b6ff4f0 EFLAGS: 00000206
RAX: dcdc4564f556c700 RBX: 0000000000000001 RCX: 0000000000040000
RDX: ffffc9001712b000 RSI: ffffffff8beae6a0 RDI: ffffffff8c3f9480
RBP: 0000000000000000 R08: ffffffff8ba0b793 R09: 1ffffffff269cf00
R10: dffffc0000000000 R11: fffffbfff269cf01 R12: 0000000000000246
R13: ffff888021383c00 R14: 00000000ffffffff R15: ffff888016379e18
 lock_is_held include/linux/lockdep.h:249 [inline]
 mt_locked lib/maple_tree.c:781 [inline]
 mas_root lib/maple_tree.c:832 [inline]
 mas_start+0x1d4/0x5a0 lib/maple_tree.c:1362
 mas_state_walk lib/maple_tree.c:3671 [inline]
 mt_find+0x2dc/0x850 lib/maple_tree.c:6932
 find_vma+0xf9/0x170 mm/mmap.c:2019
 lock_mm_and_find_vma+0x5f/0x2f0 mm/memory.c:5933
 do_user_addr_fault arch/x86/mm/fault.c:1361 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x1bf/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:__put_user_nocheck_4+0x7/0x20 arch/x86/lib/putuser.S:97
Code: d9 0f 01 cb 89 01 31 c9 0f 01 ca c3 cc cc cc cc 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 01 cb <89> 01 31 c9 0f 01 ca c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc9000b6ff8f8 EFLAGS: 00050202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000201c2030
RDX: ffff888021383c00 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffffc9000b6ffa70 R08: ffffffff89707d93 R09: 1ffff920016dfed0
R10: dffffc0000000000 R11: fffff520016dfed1 R12: dffffc0000000000
R13: 0000000000000002 R14: 0000000000000000 R15: 00000000201c2000
 ____sys_recvmsg+0x2b9/0x470 net/socket.c:2829
 ___sys_recvmsg net/socket.c:2858 [inline]
 do_recvmmsg+0x474/0xae0 net/socket.c:2952
 __sys_recvmmsg net/socket.c:3031 [inline]
 __do_sys_recvmmsg net/socket.c:3054 [inline]
 __se_sys_recvmmsg net/socket.c:3047 [inline]
 __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3047
 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: 0033:0x7f7b97b77299
RSP: 002b:00007f7b989f9048 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f7b97d06058 RCX: 00007f7b97b77299
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000005
RBP: 00007f7b97be48e6 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f7b97d06058 R15: 00007ffcf5cae218
 </TASK>
task:modprobe        state:R  running task     stack:23680 pid:6534  tgid:6534  ppid:11     flags:0x00000002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:6851
 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:__down_read_trylock kernel/locking/rwsem.c:1281 [inline]
RIP: 0010:down_read_trylock+0xa2/0x3c0 kernel/locking/rwsem.c:1565
Code: 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 03 03 00 00 83 3d 00 af 87 0e 00 75 32 4d 8d 77 68 4c 89 f3 48 c1 eb 03 42 80 3c 2b 00 <74> 08 4c 89 f7 e8 14 b6 88 00 4d 39 7f 68 74 12 80 3d e5 57 71 0e
RSP: 0000:ffffc9000bd77d20 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff1100465aa0d RCX: 1ffff920017aefa8
RDX: 1ffff920017aefa8 RSI: 0000000000000032 RDI: ffff8880232d5000
RBP: ffffc9000bd77dd0 R08: ffffffff81deffbc R09: ffffffff8ba0b412
R10: 0000000000000003 R11: ffff888020f8bc00 R12: 1ffff1100466687e
R13: dffffc0000000000 R14: ffff8880232d5068 R15: ffff8880232d5000
 vma_start_read include/linux/mm.h:690 [inline]
 lock_vma_under_rcu+0x2f9/0x6e0 mm/memory.c:5999
 do_user_addr_fault arch/x86/mm/fault.c:1329 [inline]
 handle_page_fault arch/x86/mm/fault.c:1481 [inline]
 exc_page_fault+0x17b/0x8c0 arch/x86/mm/fault.c:1539
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7fb76fdb3439
RSP: 002b:00007ffcef60c438 EFLAGS: 00010283
RAX: 0000000000000000 RBX: 000055e6c3ffa910 RCX: ffffffffffffff90
RDX: 000055e69d07b000 RSI: 00007ffcef60c510 RDI: 000055e69d07b000
RBP: 00007fb76fef8b22 R08: 00007fb76fe408c0 R09: 0000000000000000
R10: 000000000000006c R11: 0000000000000217 R12: 00007fb76fef8b22
R13: 0000000000000019 R14: 00007fb76fe01c29 R15: 00007ffcef60c510
 </TASK>
rcu: rcu_preempt kthread starved for 9266 jiffies! g14529 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:26608 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5188 [inline]
 __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529
 __schedule_loop kernel/sched/core.c:6606 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6621
 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-syzkaller-12881-g6342649c33d2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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:acpi_safe_halt+0x21/0x30 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 65 48 8b 04 25 00 d7 03 00 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d e5 7b 9c 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: ffff8880182a8000 RBX: ffff88801b2fe864 RCX: 000000000111b281
RDX: 0000000000000001 RSI: ffff88801b2fe800 RDI: ffff88801b2fe864
RBP: 000000000003a678 R08: ffff8880b9337c7b R09: 1ffff11017266f8f
R10: dffffc0000000000 R11: ffffffff8bacc790 R12: ffff8880183a7800
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8eec7960
FS:  0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc6292d1ab8 CR3: 0000000066530000 CR4: 00000000003526f0
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:702
 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>