------------[ cut here ]------------
kernel BUG at fs/ext4/extents.c:3180!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 682 Comm: syz.1.44 Not tainted 5.10.234-syzkaller-1006652-g3f5f2283d684 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:ext4_split_extent_at+0x121c/0x1240 fs/ext4/extents.c:3180
Code: fe c1 38 c1 0f 8c 16 fa ff ff e8 cf b7 cf ff 48 8b 54 24 58 48 8b 74 24 40 e9 02 fa ff ff e8 1b 18 92 ff 0f 0b e8 14 18 92 ff <0f> 0b e8 0d 18 92 ff 0f 0b e8 66 4f d5 02 e8 01 18 92 ff 0f 0b e8
RSP: 0018:ffffc90001696440 EFLAGS: 00010293
RAX: ffffffff81d8a74c RBX: 000000000000003d RCX: ffff88812c230000
RDX: 0000000000000000 RSI: 000000000000001f RDI: 000000000000003d
RBP: ffffc900016965b8 R08: ffffffff81d897b2 R09: ffffc90001696540
R10: fffff520002d2ca9 R11: dffffc0000000001 R12: 0000000000000032
R13: 0000000000000010 R14: 1ffff110242b7e02 R15: 000000000000000b
FS:  00007efc8f1ca6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000040000004007f CR3: 000000011b17f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_split_extent+0x370/0x4e0 fs/ext4/extents.c:3379
 ext4_split_convert_extents fs/ext4/extents.c:3708 [inline]
 ext4_ext_handle_unwritten_extents fs/ext4/extents.c:3869 [inline]
 ext4_ext_map_blocks+0x2206/0x6ee0 fs/ext4/extents.c:4224
 ext4_map_blocks+0xa65/0x1d10 fs/ext4/inode.c:673
 _ext4_get_block+0x21b/0x610 fs/ext4/inode.c:816
 ext4_get_block_unwritten+0x2a/0x40 fs/ext4/inode.c:847
 ext4_block_write_begin+0x61e/0x13b0 fs/ext4/inode.c:1100
 ext4_write_begin+0x6fa/0x1730
 ext4_da_write_begin+0x49d/0xf60 fs/ext4/inode.c:3032
 generic_perform_write+0x2cd/0x570 mm/filemap.c:3509
 ext4_buffered_write_iter+0x482/0x610 fs/ext4/file.c:271
 ext4_file_write_iter+0x193/0x1c80 fs/ext4/file.c:685
 do_iter_readv_writev+0x58e/0x790
 do_iter_write+0x183/0x640 fs/read_write.c:866
 vfs_iter_write+0x7c/0xa0 fs/read_write.c:907
 iter_file_splice_write+0x7f8/0xf90 fs/splice.c:689
 do_splice_from fs/splice.c:767 [inline]
 direct_splice_actor+0xff/0x130 fs/splice.c:936
 splice_direct_to_actor+0x4d1/0xba0 fs/splice.c:891
 do_splice_direct+0x27f/0x3c0 fs/splice.c:979
 do_sendfile+0x8f4/0x10e0 fs/read_write.c:1257
 __do_sys_sendfile64 fs/read_write.c:1318 [inline]
 __se_sys_sendfile64 fs/read_write.c:1304 [inline]
 __x64_sys_sendfile64+0x1ce/0x230 fs/read_write.c:1304
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7efc8f758169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efc8f1ca038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007efc8f970fa0 RCX: 00007efc8f758169
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000005
RBP: 00007efc8f7d92a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000100001 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007efc8f970fa0 R15: 00007fff6740add8
Modules linked in:
---[ end trace b4213e71ed20ce3f ]---
RIP: 0010:ext4_split_extent_at+0x121c/0x1240 fs/ext4/extents.c:3180
Code: fe c1 38 c1 0f 8c 16 fa ff ff e8 cf b7 cf ff 48 8b 54 24 58 48 8b 74 24 40 e9 02 fa ff ff e8 1b 18 92 ff 0f 0b e8 14 18 92 ff <0f> 0b e8 0d 18 92 ff 0f 0b e8 66 4f d5 02 e8 01 18 92 ff 0f 0b e8
RSP: 0018:ffffc90001696440 EFLAGS: 00010293
RAX: ffffffff81d8a74c RBX: 000000000000003d RCX: ffff88812c230000
RDX: 0000000000000000 RSI: 000000000000001f RDI: 000000000000003d
RBP: ffffc900016965b8 R08: ffffffff81d897b2 R09: ffffc90001696540
R10: fffff520002d2ca9 R11: dffffc0000000001 R12: 0000000000000032
R13: 0000000000000010 R14: 1ffff110242b7e02 R15: 000000000000000b
FS:  00007efc8f1ca6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdec67fbba0 CR3: 000000011b17f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400