EXT4-fs error (device loop6): ext4_mb_mark_diskspace_used:3887: comm syz.6.1192: Allocating blocks 497-513 which overlap fs metadata
EXT4-fs (loop6): pa ffff88813341a5e8: logic 128, phys. 385, len 8
EXT4-fs error (device loop6): ext4_mb_release_inode_pa:4904: group 0, free 0, pa_free 1
------------[ cut here ]------------
kernel BUG at fs/ext4/mballoc.c:4258!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4910 Comm: syz.6.1192 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ext4_mb_normalize_request+0x1944/0x1990 fs/ext4/mballoc.c:4258
Code: 00 e9 8e fa ff ff e8 4b eb 8b ff 0f 0b e8 44 eb 8b ff 0f 0b e8 3d eb 8b ff e9 b7 fb ff ff e8 33 eb 8b ff 0f 0b e8 2c eb 8b ff <0f> 0b e8 25 eb 8b ff 0f 0b e8 1e eb 8b ff 48 8b 45 80 42 80 3c 28
RSP: 0018:ffffc9000198ec68 EFLAGS: 00010283
RAX: ffffffff81dde1d4 RBX: 0000000000000060 RCX: 0000000000080000
RDX: ffffc9000d0c4000 RSI: 0000000000043485 RDI: 0000000000043486
RBP: ffffc9000198ed50 R08: ffff8881337b09ef R09: 1ffff110266f613d
R10: dffffc0000000000 R11: ffffed10266f613e R12: 000000000000001f
R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000001f
FS:  00007f48a9d666c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3220dff8 CR3: 0000000111e96000 CR4: 00000000003506b0
Call Trace:
 <TASK>
 ext4_mb_new_blocks+0xbfd/0x42c0 fs/ext4/mballoc.c:5781
 ext4_ext_map_blocks+0x1722/0x61e0 fs/ext4/extents.c:4341
 ext4_map_blocks+0x988/0x1b30 fs/ext4/inode.c:674
 mpage_map_one_extent fs/ext4/inode.c:2421 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2474 [inline]
 ext4_writepages+0x123f/0x3090 fs/ext4/inode.c:2842
 do_writepages+0x473/0x6c0 mm/page-writeback.c:2388
 filemap_fdatawrite_wbc+0x1f4/0x250 mm/filemap.c:409
 __filemap_fdatawrite_range mm/filemap.c:442 [inline]
 file_write_and_wait_range+0x14d/0x220 mm/filemap.c:819
 ext4_sync_file+0x1a9/0xa10 fs/ext4/fsync.c:151
 vfs_fsync_range+0x190/0x1a0 fs/sync.c:188
 generic_write_sync include/linux/fs.h:3038 [inline]
 ext4_buffered_write_iter+0x5d0/0x670 fs/ext4/file.c:277
 ext4_file_write_iter+0x440/0x1540 fs/ext4/file.c:-1
 call_write_iter include/linux/fs.h:2212 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x835/0xfd0 fs/read_write.c:594
 ksys_pwrite64 fs/read_write.c:701 [inline]
 __do_sys_pwrite64 fs/read_write.c:711 [inline]
 __se_sys_pwrite64 fs/read_write.c:708 [inline]
 __x64_sys_pwrite64+0x197/0x220 fs/read_write.c:708
 x64_sys_call+0xa6/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:19
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f48ab30b799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f48a9d66028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f48ab584fa0 RCX: 00007f48ab30b799
RDX: 00000000200000c1 RSI: 00002000000000c0 RDI: 0000000000000007
RBP: 00007f48ab3a1bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000009000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f48ab585038 R14: 00007f48ab584fa0 R15: 00007fffd9147a48
 </TASK>
Modules linked in:
---[ end trace 92e7392de08d5989 ]---
RIP: 0010:ext4_mb_normalize_request+0x1944/0x1990 fs/ext4/mballoc.c:4258
Code: 00 e9 8e fa ff ff e8 4b eb 8b ff 0f 0b e8 44 eb 8b ff 0f 0b e8 3d eb 8b ff e9 b7 fb ff ff e8 33 eb 8b ff 0f 0b e8 2c eb 8b ff <0f> 0b e8 25 eb 8b ff 0f 0b e8 1e eb 8b ff 48 8b 45 80 42 80 3c 28
RSP: 0018:ffffc9000198ec68 EFLAGS: 00010283
RAX: ffffffff81dde1d4 RBX: 0000000000000060 RCX: 0000000000080000
RDX: ffffc9000d0c4000 RSI: 0000000000043485 RDI: 0000000000043486
RBP: ffffc9000198ed50 R08: ffff8881337b09ef R09: 1ffff110266f613d
R10: dffffc0000000000 R11: ffffed10266f613e R12: 000000000000001f
R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000001f
FS:  00007f48a9d666c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd395beefd0 CR3: 0000000111e96000 CR4: 00000000003506b0