arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x60 kernel/entry/common.c:296 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 ------------[ cut here ]------------ kernel BUG at include/linux/page-flags.h:314! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 3 PID: 41 Comm: kcompactd0 Not tainted 6.6.0-syzkaller-00207-g14ab6d425e80 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:folio_flags+0x1b7/0x1f0 include/linux/page-flags.h:314 Code: 06 41 83 e4 01 44 89 e6 e8 e6 4f b1 ff 45 84 e4 0f 85 c9 fe ff ff e8 a8 54 b1 ff 48 c7 c6 a0 30 9a 8a 48 89 ef e8 f9 1f ef ff <0f> 0b e8 22 67 06 00 e9 6c fe ff ff 48 89 ef e8 15 67 06 00 eb b7 RSP: 0018:ffffc90000bb78b8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff888017740b80 RSI: ffffffff81d58297 RDI: ffffffff8ae91d00 RBP: ffffea0000eda600 R08: 0000000000000000 R09: fffffbfff1d96cda R10: ffffffff8ecb66d7 R11: 0000000000000000 R12: 0000000000000000 R13: ffffea0000eda5c0 R14: ffffea0000eda600 R15: 000000000003b698 FS: 0000000000000000(0000) GS:ffff88806b900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd3c08c66e4 CR3: 00000000553cd000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: folio_test_hugetlb include/linux/page-flags.h:835 [inline] PageHuge+0x215/0x2b0 mm/hugetlb.c:2082 isolate_migratepages_block+0x61b/0x4a40 mm/compaction.c:950 isolate_migratepages mm/compaction.c:2053 [inline] compact_zone+0x18f6/0x4020 mm/compaction.c:2491 proactive_compact_node+0x118/0x1d0 mm/compaction.c:2780 kcompactd+0x710/0xd80 mm/compaction.c:3100 kthread+0x33c/0x440 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:folio_flags+0x1b7/0x1f0 include/linux/page-flags.h:314 Code: 06 41 83 e4 01 44 89 e6 e8 e6 4f b1 ff 45 84 e4 0f 85 c9 fe ff ff e8 a8 54 b1 ff 48 c7 c6 a0 30 9a 8a 48 89 ef e8 f9 1f ef ff <0f> 0b e8 22 67 06 00 e9 6c fe ff ff 48 89 ef e8 15 67 06 00 eb b7 RSP: 0018:ffffc90000bb78b8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff888017740b80 RSI: ffffffff81d58297 RDI: ffffffff8ae91d00 RBP: ffffea0000eda600 R08: 0000000000000000 R09: fffffbfff1d96cda R10: ffffffff8ecb66d7 R11: 0000000000000000 R12: 0000000000000000 R13: ffffea0000eda5c0 R14: ffffea0000eda600 R15: 000000000003b698 FS: 0000000000000000(0000) GS:ffff88806b900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd3c08c66e4 CR3: 00000000553cd000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400