GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P30927/1:b..l rcu: (detected by 0, t=10502 jiffies, g=186929, q=1260138 ncpus=1) task:syz.0.8938 state:R running task stack:22504 pid:30927 tgid:30927 ppid:5596 task_flags:0x40074c flags:0x00080001 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x1259/0x6920 kernel/sched/core.c:7284 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7606 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x205/0xa10 kernel/entry/common.c:167 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:__orc_find+0x3d/0xf0 arch/x86/kernel/unwind_orc.c:105 Code: 53 48 83 ec 08 85 d2 0f 84 99 00 00 00 49 89 fe 48 89 f0 49 39 fc 72 7b 48 b9 00 00 00 00 00 fc ff df 49 89 ff 48 89 fd eb 0c <48> 8d 6b 04 49 89 df 49 39 ec 72 4e 4c 89 e2 48 29 ea 48 89 d6 48 RSP: 0018:ffffc900062deee0 EFLAGS: 00000212 RAX: ffffffff91f9f122 RBX: ffffffff916a1360 RCX: dffffc0000000000 RDX: ffffffff829dc155 RSI: 0000000000000000 RDI: ffffffff916a1358 RBP: ffffffff916a1360 R08: ffffffff91f9f158 R09: 0000000000000007 R10: 0000000000000200 R11: 0000000000019dc1 R12: ffffffff916a1364 R13: ffffffff829dc184 R14: ffffffff916a1358 R15: ffffffff916a135c orc_find arch/x86/kernel/unwind_orc.c:238 [inline] unwind_next_frame+0x2ec/0x2090 arch/x86/kernel/unwind_orc.c:510 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122 save_stack+0x162/0x1e0 mm/page_owner.c:183 __reset_page_owner+0x84/0x190 mm/page_owner.c:338 reset_page_owner include/linux/page_owner.h:26 [inline] __free_pages_prepare mm/page_alloc.c:1418 [inline] free_unref_folios+0xa4a/0x1790 mm/page_alloc.c:3022 folios_put_refs+0x585/0xaa0 mm/folio.c:1036 folio_batch_release include/linux/folio_batch.h:101 [inline] shmem_undo_range+0x5e5/0x1570 mm/shmem.c:1161 shmem_truncate_range mm/shmem.c:1289 [inline] shmem_evict_inode+0x3b1/0xca0 mm/shmem.c:1420 evict+0x3c2/0xad0 fs/inode.c:822 iput_final fs/inode.c:2014 [inline] iput.part.0+0x989/0x1050 fs/inode.c:2063 iput+0x35/0x40 fs/inode.c:2029 dentry_unlink_inode+0x284/0x470 fs/dcache.c:479 dentry_kill+0x25d/0xc20 fs/dcache.c:826 finish_dput fs/dcache.c:1001 [inline] dput.part.0+0xd7/0x240 fs/dcache.c:1042 dput+0x1f/0x30 fs/dcache.c:1037 __fput+0x519/0xb50 fs/file_table.c:520 task_work_run+0x150/0x240 kernel/task_work.c:233 exit_task_work include/linux/task_work.h:40 [inline] do_exit+0x8da/0x2a50 kernel/exit.c:986 do_group_exit+0xd5/0x2a0 kernel/exit.c:1129 get_signal+0x1ec7/0x21e0 kernel/signal.c:3112 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop kernel/entry/common.c:101 [inline] __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline] irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline] irqentry_exit+0x402/0xa10 kernel/entry/common.c:165 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0033:0x7f00cd053bd7 RSP: 002b:00007f00ce0271a0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007f00cd19e159 RDX: 00007f00ce0271c0 RSI: 00007f00ce0272f0 RDI: 000000000000000b RBP: 00007f00cd23506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f00cd426038 R14: 00007f00cd425fa0 R15: 00007fff42fba878