rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 ticks this GP) idle=1ea4/1/0x4000000000000000 softirq=44694/44697 fqs=0
	(detected by 0, t=10506 jiffies, g=61417, q=39 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10818 Comm: syz.0.1951 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:mark_lock+0x9c/0x320 kernel/locking/lockdep.c:4606
Code: 89 c7 41 81 e7 ff 1f 00 00 c1 e8 03 25 f8 03 00 00 48 8d b8 40 22 ae 90 be 08 00 00 00 e8 3c 54 6d 00 4c 0f a3 3d 34 73 4a 0f <73> 10 4b 8d 04 7f c1 e0 06 4c 8d b8 00 a1 46 90 eb 24 48 c7 c0 40
RSP: 0018:ffffc900001e08a0 EFLAGS: 00000057
RAX: 0000000000000001 RBX: ffff88802e0a8000 RCX: ffffffff8163af04
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90ae2248
RBP: 0000000000000008 R08: dffffc0000000000 R09: fffffbfff215c44a
R10: fffffbfff215c44a R11: 1ffffffff215c449 R12: 0000000000000100
R13: dffffc0000000000 R14: ffff88802e0a8b30 R15: 000000000000005e
FS:  00005555910c1500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2df20000 CR3: 00000000797d2000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 mark_usage kernel/locking/lockdep.c:4549 [inline]
 __lock_acquire+0xd6f/0x7c50 kernel/locking/lockdep.c:5003
 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irq+0x9f/0xe0 kernel/locking/spinlock.c:170
 __run_hrtimer kernel/time/hrtimer.c:1751 [inline]
 __hrtimer_run_queues+0x63a/0xd60 kernel/time/hrtimer.c:1811
 hrtimer_interrupt+0x3c5/0x9c0 kernel/time/hrtimer.c:1873
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:mas_data_end lib/maple_tree.c:1483 [inline]
RIP: 0010:mt_validate_nulls lib/maple_tree.c:7198 [inline]
RIP: 0010:mt_validate+0x44cb/0x4c90 lib/maple_tree.c:7247
Code: c1 e8 03 0f b6 04 18 84 c0 0f 84 28 01 00 00 44 89 f9 80 e1 07 38 c1 0f 8c 1a 01 00 00 4c 89 ff e8 aa 64 cb f7 e9 0d 01 00 00 <e8> 30 36 7b f7 49 8d 46 08 48 89 44 24 40 eb 0e e8 20 36 7b f7 48
RSP: 0018:ffffc90003af76e0 EFLAGS: 00000246
RAX: 0000000000000003 RBX: dffffc0000000000 RCX: 0000000000000005
RDX: ffffffff8a059c88 RSI: ffffffff8e085520 RDI: 0000000000000001
RBP: ffffc90003af78b0 R08: ffff88802e0a8000 R09: 0000000000000003
R10: 0000000000000003 R11: 0000000000000000 R12: ffff88801ee6bf78
R13: ffff8880605ce680 R14: ffff8880605ce600 R15: 0000000000000001
 validate_mm_mt+0xcd/0x420 mm/mmap.c:295
 validate_mm+0xcc/0x2b0 mm/mmap.c:332
 mmap_region+0x780/0x1c70 mm/mmap.c:2922
 do_mmap+0x958/0xfd0 mm/mmap.c:1436
 vm_mmap_pgoff+0x1b2/0x2b0 mm/util.c:520
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7c1df8f003
Code: f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 41 89 ca 41 f7 c1 ff 0f 00 00 75 14 b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 25 c3 0f 1f 40 00 48 c7 c0 a8 ff ff ff 64 c7
RSP: 002b:00007ffd336aef58 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f7c1c9f76c0 RCX: 00007f7c1df8f003
RDX: 0000000000000000 RSI: 0000000000021000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000ffffffff R09: 0000000000000000
R10: 0000000000020022 R11: 0000000000000246 R12: 00007ffd336af0b0
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
 </TASK>
rcu: rcu_preempt kthread starved for 10506 jiffies! g61417 f0x0 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:27840 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 10796 Comm: syz.9.1942 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:csd_lock_wait kernel/smp.c:424 [inline]
RIP: 0010:smp_call_function_many_cond+0xe8d/0x1270 kernel/smp.c:998
Code: 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 07 e8 e9 d5 0a 00 eb 37 f3 90 41 0f b6 04 1c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e <e8> ce d5 0a 00 eb e5 44 89 f9 80 e1 07 80 c1 03 38 c1 7c e3 4c 89
RSP: 0018:ffffc9000384faa0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90018f4f000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000384fbf0 R08: dffffc0000000000 R09: ffffed10171c7773
R10: ffffed10171c7773 R11: 1ffff110171c7772 R12: 1ffff110171e81c9
R13: ffff8880b8e3bb80 R14: 0000000000000001 R15: ffff8880b8f40e48
FS:  00007f5c15dc36c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc3e2197000 CR3: 0000000059577000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1165
 kill_bdev block/bdev.c:75 [inline]
 set_blocksize+0x2cd/0x350 block/bdev.c:152
 sb_set_blocksize block/bdev.c:161 [inline]
 sb_min_blocksize+0xbc/0x180 block/bdev.c:177
 xfs_fs_fill_super+0x1c7/0x1350 fs/xfs/xfs_super.c:1477
 get_tree_bdev+0x3f1/0x610 fs/super.c:1366
 vfs_get_tree+0x88/0x270 fs/super.c:1573
 do_new_mount+0x24a/0xa40 fs/namespace.c:3078
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3606
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5c14f9076a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f5c15dc2e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f5c15dc2ef0 RCX: 00007f5c14f9076a
RDX: 0000200000009740 RSI: 0000200000009780 RDI: 00007f5c15dc2eb0
RBP: 0000200000009740 R08: 00007f5c15dc2ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000009780
R13: 00007f5c15dc2eb0 R14: 00000000000097a6 R15: 0000200000000000
 </TASK>