------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 0 PID: 35 at kernel/locking/lockdep.c:234 hlock_class kernel/locking/lockdep.c:234 [inline] WARNING: CPU: 0 PID: 35 at kernel/locking/lockdep.c:234 check_wait_context kernel/locking/lockdep.c:4852 [inline] WARNING: CPU: 0 PID: 35 at kernel/locking/lockdep.c:234 __lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5178 Modules linked in: CPU: 0 UID: 0 PID: 35 Comm: kcompactd1 Not tainted 6.14.0-rc7-syzkaller-00069-g81e4f8d68c66 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:hlock_class kernel/locking/lockdep.c:234 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4852 [inline] RIP: 0010:__lock_acquire+0x564/0x2100 kernel/locking/lockdep.c:5178 Code: 00 00 83 3d 01 4e a0 0e 00 75 23 90 48 c7 c7 40 b2 2a 8c 48 c7 c6 40 b5 2a 8c e8 97 bc e4 ff 48 ba 00 00 00 00 00 fc ff df 90 <0f> 0b 90 90 90 31 db 48 81 c3 c4 00 00 00 48 89 d8 48 c1 e8 03 0f RSP: 0018:ffffc90000ab7430 EFLAGS: 00010046 RAX: 36e6d74489b57400 RBX: 0000000000001b20 RCX: ffff888140eb0000 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00000000000c1b20 R08: ffffffff81819e52 R09: 1ffff110170c519a R10: dffffc0000000000 R11: ffffed10170c519b R12: ffff888140eb0ad4 R13: 0000000000000000 R14: 1ffff110281d6162 R15: ffff888140eb0b10 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30118ff8 CR3: 000000002f510000 CR4: 0000000000350ef0 Call Trace: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606 raw_spin_rq_lock kernel/sched/sched.h:1521 [inline] rq_lock kernel/sched/sched.h:1852 [inline] __schedule+0x357/0x4c90 kernel/sched/core.c:6688 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7087 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707 RIP: 0010:fill_contig_page_info mm/vmstat.c:1093 [inline] RIP: 0010:extfrag_for_order+0x7e/0x120 mm/vmstat.c:1141 Code: 68 48 83 fd 0b 74 5f 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 f6 ae 21 00 4d 8b 7d 00 <4d> 89 fe 89 e9 49 d3 e6 48 3b 6c 24 08 72 ba 48 8b 44 24 20 48 01 RSP: 0018:ffffc90000ab7a68 EFLAGS: 00000246 RAX: 1ffff11047fff0e8 RBX: ffff88823fff8740 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000009 RDI: ffff88823fff83c0 RBP: 0000000000000004 R08: ffffffff820b7b48 R09: 1ffff92000156f50 R10: dffffc0000000000 R11: fffff52000156f51 R12: 0000000000000846 R13: ffff88823fff8740 R14: 0000000000000660 R15: 000000000000005a fragmentation_score_zone mm/compaction.c:2205 [inline] fragmentation_score_zone_weighted mm/compaction.c:2222 [inline] fragmentation_score_node+0x193/0x340 mm/compaction.c:2244 should_proactive_compact_node mm/compaction.c:2271 [inline] kcompactd+0x76e/0x1540 mm/compaction.c:3223 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 ---------------- Code disassembly (best guess): 0: 68 48 83 fd 0b push $0xbfd8348 5: 74 5f je 0x66 7: 48 89 d8 mov %rbx,%rax a: 48 c1 e8 03 shr $0x3,%rax e: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 15: fc ff df 18: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) 1c: 74 08 je 0x26 1e: 48 89 df mov %rbx,%rdi 21: e8 f6 ae 21 00 call 0x21af1c 26: 4d 8b 7d 00 mov 0x0(%r13),%r15 * 2a: 4d 89 fe mov %r15,%r14 <-- trapping instruction 2d: 89 e9 mov %ebp,%ecx 2f: 49 d3 e6 shl %cl,%r14 32: 48 3b 6c 24 08 cmp 0x8(%rsp),%rbp 37: 72 ba jb 0xfffffff3 39: 48 8b 44 24 20 mov 0x20(%rsp),%rax 3e: 48 rex.W 3f: 01 .byte 0x1