------------[ cut here ]------------
WARNING: CPU: 0 PID: 6725 at fs/ext4/inode.c:3415 ext4_iomap_begin+0x964/0xad0 fs/ext4/inode.c:3415
Modules linked in:
CPU: 0 UID: 0 PID: 6725 Comm: syz.3.19 Not tainted 6.15.0-rc5-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:ext4_iomap_begin+0x964/0xad0 fs/ext4/inode.c:3415
Code: 00 00 75 72 44 89 f0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 86 2c 53 ff e9 73 ff ff ff e8 7c 2c 53 ff <0f> 0b 41 be de ff ff ff 49 bf 00 00 00 00 00 fc ff df eb 84 89 d9
RSP: 0018:ffffc9000399f100 EFLAGS: 00010293
RAX: ffffffff82691b24 RBX: ffff88805bd93f22 RCX: ffff888023f45a00
RDX: 0000000000000000 RSI: 00000000000000d4 RDI: 0000000000000000
RBP: ffffc9000399f258 R08: ffff88805bd93bc7 R09: 1ffff1100b7b2778
R10: dffffc0000000000 R11: ffffed100b7b2779 R12: 00000000000000d4
R13: 1ffff1100b7b27e4 R14: 000000000000000a R15: 0000000000000000
FS:  00007f5ebd6136c0(0000) GS:ffff888126b7c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5ebd5f2d58 CR3: 00000000796c2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iomap_iter+0x516/0xe00 fs/iomap/iter.c:109
 __iomap_dio_rw+0xc63/0x1de0 fs/iomap/direct-io.c:733
 iomap_dio_rw+0x45/0xb0 fs/iomap/direct-io.c:823
 ext4_dio_write_iter fs/ext4/file.c:575 [inline]
 ext4_file_write_iter+0x16a2/0x1bc0 fs/ext4/file.c:716
 iter_file_splice_write+0x937/0x1000 fs/splice.c:738
 do_splice_from fs/splice.c:935 [inline]
 direct_splice_actor+0xfe/0x160 fs/splice.c:1158
 splice_direct_to_actor+0x5a5/0xcb0 fs/splice.c:1102
 do_splice_direct_actor fs/splice.c:1201 [inline]
 do_splice_direct+0x181/0x270 fs/splice.c:1227
 do_sendfile+0x4da/0x7d0 fs/read_write.c:1368
 __do_sys_sendfile64 fs/read_write.c:1429 [inline]
 __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1415
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x7f/0x160 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f5ebc78e969
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:00007f5ebd613038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f5ebc9b6080 RCX: 00007f5ebc78e969
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004
RBP: 00007f5ebc810ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000014000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f5ebc9b6080 R15: 00007ffdf0e925b8
 </TASK>