------------[ cut here ]------------
WARNING: CPU: 0 PID: 6921 at fs/ext4/inode.c:3415 ext4_iomap_begin+0x967/0xad0 fs/ext4/inode.c:3415
Modules linked in:
CPU: 0 UID: 0 PID: 6921 Comm: syz.2.134 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ext4_iomap_begin+0x967/0xad0 fs/ext4/inode.c:3415
Code: 00 75 74 44 89 f0 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 24 eb 50 ff e9 73 ff ff ff e8 1a eb 50 ff 90 <0f> 0b 90 41 be de ff ff ff 49 bf 00 00 00 00 00 fc ff df eb 82 89
RSP: 0018:ffffc900046bf0e0 EFLAGS: 00010293
RAX: ffffffff826f05c6 RBX: ffff88804fcc1782 RCX: ffff888029c91e00
RDX: 0000000000000000 RSI: 00000000000000d4 RDI: 0000000000000000
RBP: ffffc900046bf238 R08: ffff88804fcc1427 R09: 1ffff11009f98284
R10: dffffc0000000000 R11: ffffed1009f98285 R12: 00000000000000d4
R13: 1ffff11009f982f0 R14: 000000000000000a R15: 0000000000000000
FS:  00007f9bc4c846c0(0000) GS:ffff8881260f6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1865f56440 CR3: 0000000079f98000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iomap_iter+0x53a/0xdf0 fs/iomap/iter.c:109
 __iomap_dio_rw+0xc67/0x1e40 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+0x5a8/0xcc0 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+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9bc3d8e969
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:00007f9bc4c84038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f9bc3fb5fa0 RCX: 00007f9bc3d8e969
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005
RBP: 00007f9bc3e10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9bc3fb5fa0 R15: 00007ffe7e190068
 </TASK>