ext4_file_write_iter+0x819/0x1950 fs/ext4/file.c:698 __kernel_write_iter+0x261/0x7b0 fs/read_write.c:523 dump_emit_page fs/coredump.c:888 [inline] dump_user_range+0x299/0x790 fs/coredump.c:915 ------------[ cut here ]------------ kernel BUG at include/linux/page-flags.h:314! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 15485 Comm: syz-executor.3 Not tainted 6.7.0-syzkaller-01727-gab27740f7665 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:folio_flags+0x1b9/0x1f0 include/linux/page-flags.h:314 Code: 41 83 e4 01 44 89 e6 e8 55 01 af ff 45 84 e4 0f 85 c8 fe ff ff e8 17 06 af ff 48 c7 c6 20 87 da 8a 48 89 ef e8 78 cd ed ff 90 <0f> 0b e8 e0 21 06 00 e9 6a fe ff ff 48 89 ef e8 d3 21 06 00 eb b6 RSP: 0018:ffffc90015e1f348 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffc9000b96a000 RDX: 0000000000040000 RSI: ffffffff81d90e98 RDI: 0000000000000000 RBP: ffffea0000dd7000 R08: 0000000000000000 R09: fffffbfff1e73772 R10: ffffffff8f39bb97 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000004 R14: ffffea0000dd7000 R15: 00000000000375c0 FS: 00007f9bda4d66c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002012a030 CR3: 000000002f1f1000 CR4: 0000000000350ef0 Call Trace: folio_test_hugetlb include/linux/page-flags.h:849 [inline] PageHuge+0x215/0x2b0 mm/hugetlb.c:2173 isolate_migratepages_block+0x61b/0x4a60 mm/compaction.c:949 isolate_migratepages mm/compaction.c:2055 [inline] compact_zone+0x18ef/0x3f80 mm/compaction.c:2511 compact_node+0x13e/0x1e0 mm/compaction.c:2832 compact_nodes mm/compaction.c:2845 [inline] sysctl_compaction_handler mm/compaction.c:2891 [inline] sysctl_compaction_handler+0x11b/0x1c0 mm/compaction.c:2878 proc_sys_call_handler+0x4c6/0x6f0 fs/proc/proc_sysctl.c:600 call_write_iter include/linux/fs.h:2085 [inline] iter_file_splice_write+0x7c8/0xda0 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x19b/0x6c0 fs/splice.c:1164 splice_direct_to_actor+0x347/0xa30 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x17e/0x250 fs/splice.c:1233 do_sendfile+0xaa8/0xdb0 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1356 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x155/0x220 fs/read_write.c:1348 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f9bd967cd29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9bda4d60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f9bd97abf80 RCX: 00007f9bd967cd29 RDX: 0000000020002080 RSI: 0000000000000003 RDI: 0000000000000004 RBP: 00007f9bd96c947a R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000023b R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f9bd97abf80 R15: 00007ffc51fa6ac8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:folio_flags+0x1b9/0x1f0 include/linux/page-flags.h:314 Code: 41 83 e4 01 44 89 e6 e8 55 01 af ff 45 84 e4 0f 85 c8 fe ff ff e8 17 06 af ff 48 c7 c6 20 87 da 8a 48 89 ef e8 78 cd ed ff 90 <0f> 0b e8 e0 21 06 00 e9 6a fe ff ff 48 89 ef e8 d3 21 06 00 eb b6 RSP: 0018:ffffc90015e1f348 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffc9000b96a000 RDX: 0000000000040000 RSI: ffffffff81d90e98 RDI: 0000000000000000 RBP: ffffea0000dd7000 R08: 0000000000000000 R09: fffffbfff1e73772 R10: ffffffff8f39bb97 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000004 R14: ffffea0000dd7000 R15: 00000000000375c0 FS: 00007f9bda4d66c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feec81e8d58 CR3: 000000002f1f1000 CR4: 0000000000350ef0