rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=32a4/1/0x4000000000000000 softirq=41974/41975 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=48865, q=232 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12833 Comm: syz.1.2423 Not tainted 6.14.0-rc1-syzkaller-00181-g7ee983c850b4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:lookup_object lib/debugobjects.c:423 [inline]
RIP: 0010:lookup_object_or_alloc lib/debugobjects.c:662 [inline]
RIP: 0010:debug_object_activate+0x1c2/0x580 lib/debugobjects.c:820
Code: 36 fd 48 89 5c 24 30 4c 8b 3b 45 31 e4 eb 06 4d 8b 3f 41 ff c4 4d 85 ff 74 40 49 8d 5f 18 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 34 ed 36 fd 48 8b 44 24 10 48 39 03 0f 84 16 01
RSP: 0018:ffffc90000a18be0 EFLAGS: 00000046
RAX: 1ffff1100d9fbfc3 RBX: ffff88806cfdfe18 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffc90000a18ac0
RBP: ffffc90000a18cf8 R08: 0000000000000003 R09: fffff52000143158
R10: dffffc0000000000 R11: fffff52000143158 R12: 0000000000000000
R13: 1ffff92000143184 R14: dffffc0000000000 R15: ffff88806cfdfe00
FS:  00007fdd84d9b6c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30215ff8 CR3: 000000002a5d2000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 debug_hrtimer_activate kernel/time/hrtimer.c:455 [inline]
 debug_activate kernel/time/hrtimer.c:496 [inline]
 enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1100
 __run_hrtimer kernel/time/hrtimer.c:1818 [inline]
 __hrtimer_run_queues+0x6cb/0xd30 kernel/time/hrtimer.c:1865
 hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x112/0x420 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 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:check_irqs_on fs/buffer.c:1306 [inline]
RIP: 0010:lookup_bh_lru fs/buffer.c:1358 [inline]
RIP: 0010:__find_get_block+0xed/0x1140 fs/buffer.c:1394
Code: 00 00 9c 8f 84 24 a0 00 00 00 48 b8 00 00 00 00 00 fc ff df 80 3c 03 00 74 08 4c 89 e7 e8 4b 33 dc ff 4c 8b a4 24 a0 00 00 00 <bb> 00 02 00 00 be 00 02 00 00 4c 21 e6 31 ff e8 2f 9f 75 ff 4c 21
RSP: 0018:ffffc900058e7600 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 1ffff92000b1ced4 RCX: 0000000000080000
RDX: ffffc9000bfa9000 RSI: 00000000000002d3 RDI: 00000000000002d4
RBP: ffffc900058e7728 R08: ffffffff834b9b13 R09: ffffc900058e79d0
R10: dffffc0000000000 R11: ffffffff8349d230 R12: 0000000000000246
R13: dffffc0000000000 R14: 0000000000000200 R15: 0000000000000347
 bdev_getblk+0x33/0x670 fs/buffer.c:1425
 __bread_gfp+0x86/0x400 fs/buffer.c:1485
 sb_bread include/linux/buffer_head.h:346 [inline]
 udf_read_tagged+0xa6/0xe00 fs/udf/misc.c:199
 udf_read_inode fs/udf/inode.c:1379 [inline]
 __udf_iget+0x3f3/0x3c40 fs/udf/inode.c:1966
 udf_iget fs/udf/udfdecl.h:152 [inline]
 udf_lookup+0x1e9/0x2b0 fs/udf/namei.c:127
 lookup_one_qstr_excl+0x128/0x2b0 fs/namei.c:1693
 do_renameat2+0x670/0x13f0 fs/namei.c:5167
 __do_sys_renameat2 fs/namei.c:5260 [inline]
 __se_sys_renameat2 fs/namei.c:5257 [inline]
 __x64_sys_renameat2+0xce/0xe0 fs/namei.c:5257
 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: 0033:0x7fdd83f8cde9
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:00007fdd84d9b038 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007fdd841a5fa0 RCX: 00007fdd83f8cde9
RDX: ffffffffffffff9c RSI: 0000200000000240 RDI: ffffffffffffff9c
RBP: 00007fdd8400e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000005c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdd841a5fa0 R15: 00007fffb25e05f8
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g48865 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:25968 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x190e/0x4c90 kernel/sched/core.c:6764
 __schedule_loop kernel/sched/core.c:6841 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6856
 schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
 kthread+0x7ab/0x920 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 10521 Comm: syz-executor Not tainted 6.14.0-rc1-syzkaller-00181-g7ee983c850b4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x1bae/0x2d30 kernel/smp.c:885
Code: 89 e6 83 e6 01 31 ff e8 b0 e8 0b 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 60 e4 0b 00 eb 41 f3 90 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 03 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 3b e4 0b
RSP: 0018:ffffc90004f2f560 EFLAGS: 00000293
RAX: dffffc0000000000 RBX: 1ffff110170e88f9 RCX: ffff88805aa3da00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90004f2f760 R08: ffffffff81b379b0 R09: 1ffffffff285f30e
R10: dffffc0000000000 R11: fffffbfff285f30f R12: ffff8880b863fb48
R13: ffff8880b87447c8 R14: ffff8880b863fb40 R15: 0000000000000001
FS:  00005555736e6500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555562e51808 CR3: 000000004ef26000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:966 [inline]
 flush_tlb_mm_range+0x42d/0x710 arch/x86/mm/tlb.c:1054
 dup_mmap kernel/fork.c:787 [inline]
 dup_mm kernel/fork.c:1700 [inline]
 copy_mm+0x18af/0x2160 kernel/fork.c:1752
 copy_process+0x1845/0x3d50 kernel/fork.c:2403
 kernel_clone+0x226/0x8e0 kernel/fork.c:2815
 __do_sys_clone kernel/fork.c:2958 [inline]
 __se_sys_clone kernel/fork.c:2942 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2942
 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: 0033:0x7fe657d83653
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffde86bc4f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe657d83653
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 00005555736e67d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000005819e R15: 00007ffde86bc690
 </TASK>