------------[ cut here ]------------
kernel BUG at fs/ext4/extents.c:2156!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 9339 Comm: syz.1.436 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:ext4_ext_insert_extent+0x4b19/0x4b50 fs/ext4/extents.c:2156
Code: 89 d9 80 e1 07 fe c1 38 c1 0f 8c 98 e7 ff ff 48 89 df e8 aa 01 b5 ff e9 8b e7 ff ff e8 60 f1 4e ff 90 0f 0b e8 58 f1 4e ff 90 <0f> 0b e8 50 f1 4e ff 90 0f 0b 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c
RSP: 0018:ffffc900055f6f20 EFLAGS: 00010283
RAX: ffffffff827574b8 RBX: 0000000000000030 RCX: 0000000000080000
RDX: ffffc90016935000 RSI: 000000000000a08b RDI: 000000000000a08c
RBP: ffffc900055f70d0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100c2ddb04 R12: 0000000000000030
R13: dffffc0000000000 R14: ffff88806597a454 R15: ffff88801a7b6f00
FS:  00007f0283d466c0(0000) GS:ffff88812643c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f028309aff8 CR3: 00000000347d4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_ext_map_blocks+0x15fe/0x58b0 fs/ext4/extents.c:4457
 ext4_map_create_blocks+0x11d/0x540 fs/ext4/inode.c:616
 ext4_map_blocks+0x7cd/0x11d0 fs/ext4/inode.c:809
 _ext4_get_block+0x1e3/0x470 fs/ext4/inode.c:909
 ext4_block_write_begin+0xb14/0x1950 fs/ext4/inode.c:1196
 ext4_write_begin+0xb40/0x18c0 fs/ext4/ext4_jbd2.h:-1
 generic_perform_write+0x2af/0x8b0 mm/filemap.c:4319
 ext4_buffered_write_iter+0xd0/0x3a0 fs/ext4/file.c:300
 ext4_file_write_iter+0x299/0x1c10 fs/ext4/file.c:-1
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x629/0xba0 fs/read_write.c:688
 ksys_write+0x156/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0285aec799
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:00007f0283d46028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f0285d65fa0 RCX: 00007f0285aec799
RDX: 00000000ffffff20 RSI: 00002000000000c0 RDI: 0000000000000005
RBP: 00007f0285b82c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0285d66038 R14: 00007f0285d65fa0 R15: 00007fff30a3ac28
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_ext_insert_extent+0x4b19/0x4b50 fs/ext4/extents.c:2156
Code: 89 d9 80 e1 07 fe c1 38 c1 0f 8c 98 e7 ff ff 48 89 df e8 aa 01 b5 ff e9 8b e7 ff ff e8 60 f1 4e ff 90 0f 0b e8 58 f1 4e ff 90 <0f> 0b e8 50 f1 4e ff 90 0f 0b 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c
RSP: 0018:ffffc900055f6f20 EFLAGS: 00010283
RAX: ffffffff827574b8 RBX: 0000000000000030 RCX: 0000000000080000
RDX: ffffc90016935000 RSI: 000000000000a08b RDI: 000000000000a08c
RBP: ffffc900055f70d0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100c2ddb04 R12: 0000000000000030
R13: dffffc0000000000 R14: ffff88806597a454 R15: ffff88801a7b6f00
FS:  00007f0283d466c0(0000) GS:ffff88812643c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f028309aff8 CR3: 00000000347d4000 CR4: 00000000003526f0