loop1: detected capacity change from 0 to 1024
------------[ cut here ]------------
kernel BUG at fs/ext4/extents.c:2151!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
CPU: 1 UID: 0 PID: 7195 Comm: syz.1.162 Not tainted 6.14.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ext4_ext_insert_extent+0x13e6/0x13f0 fs/ext4/extents.c:2151
Code: 82 ba a9 04 00 00 31 c9 45 31 c0 49 c7 c1 36 d2 51 82 50 e8 8c 84 05 00 48 83 c4 08 e9 5a ff ff ff e8 5e 80 92 00 90 0f 0b 90 <0f> 0b 90 0f 0b 90 0f 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90006a5f8c0 EFLAGS: 00010246
RAX: 0000000000000021 RBX: ffff88810dedce40 RCX: ffffc90006a5fa30
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888110641498
RBP: ffff88811d861400 R08: ffff8881156289d8 R09: 0000000000000001
R10: 0000000000000003 R11: ffffffffffffffff R12: 0000000000000001
R13: ffff88811d86143c R14: ffff88811541cd70 R15: ffff88810dedce70
FS:  00007fd9f4bdf6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003000 CR3: 000000010b3e8000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 ext4_ext_map_blocks+0xb8c/0x1e50 fs/ext4/extents.c:4400
 ext4_map_create_blocks fs/ext4/inode.c:516 [inline]
 ext4_map_blocks+0x25f/0x560 fs/ext4/inode.c:702
 _ext4_get_block+0x8e/0x150 fs/ext4/inode.c:781
 ext4_get_block_unwritten+0x12/0x40 fs/ext4/inode.c:814
 ext4_block_write_begin+0x17d/0x510 fs/ext4/inode.c:1063
 ext4_write_begin+0x230/0x640 fs/ext4/inode.c:-1
 generic_perform_write+0xd2/0x270 mm/filemap.c:4177
 ext4_buffered_write_iter+0xc3/0x170 fs/ext4/file.c:299
 do_iter_readv_writev+0x1a5/0x1f0 fs/read_write.c:-1
 vfs_writev+0x23a/0x4d0 fs/read_write.c:1050
 do_pwritev fs/read_write.c:1146 [inline]
 __do_sys_pwritev2 fs/read_write.c:1204 [inline]
 __se_sys_pwritev2+0x66/0x100 fs/read_write.c:1195
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xe2/0x210 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd9f516e929
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:00007fd9f4bdf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007fd9f5395fa0 RCX: 00007fd9f516e929
RDX: 0000000000000001 RSI: 0000200000000100 RDI: 0000000000000004
RBP: 00007fd9f51f0b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000005412 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd9f5395fa0 R15: 00007ffc05adeff8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_ext_insert_extent+0x13e6/0x13f0 fs/ext4/extents.c:2151
Code: 82 ba a9 04 00 00 31 c9 45 31 c0 49 c7 c1 36 d2 51 82 50 e8 8c 84 05 00 48 83 c4 08 e9 5a ff ff ff e8 5e 80 92 00 90 0f 0b 90 <0f> 0b 90 0f 0b 90 0f 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90006a5f8c0 EFLAGS: 00010246
RAX: 0000000000000021 RBX: ffff88810dedce40 RCX: ffffc90006a5fa30
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888110641498
RBP: ffff88811d861400 R08: ffff8881156289d8 R09: 0000000000000001
R10: 0000000000000003 R11: ffffffffffffffff R12: 0000000000000001
R13: ffff88811d86143c R14: ffff88811541cd70 R15: ffff88810dedce70
FS:  00007fd9f4bdf6c0(0000) GS:ffff888237d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003000 CR3: 000000010b3e8000 CR4: 0000000000350ef0