------------[ cut here ]------------
kernel BUG at fs/ext4/extents.c:2140!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 350 Comm: kworker/u4:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work
RIP: 0010:ext4_ext_insert_extent+0x477e/0x47c0 fs/ext4/extents.c:2140
Code: ff 44 89 f1 80 e1 07 fe c1 38 c1 0f 8c a5 e8 ff ff 4c 89 f7 e8 73 78 d4 ff e9 98 e8 ff ff e8 19 45 95 ff 0f 0b e8 12 45 95 ff <0f> 0b e8 0b 45 95 ff 0f 0b 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 19
RSP: 0018:ffffc900014674c0 EFLAGS: 00010293
RAX: ffffffff81d484ce RBX: ffff88811d24d400 RCX: ffff88810d6762c0
RDX: 0000000000000000 RSI: 0000000000000024 RDI: 0000000000000024
RBP: ffffc90001467670 R08: ffff888130805e77 R09: 1ffff11026100bce
R10: dffffc0000000000 R11: ffffed1026100bcf R12: 0000000000000024
R13: ffff88812164cd50 R14: ffff88811d24d40c R15: 0000000000000024
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555578943908 CR3: 000000012ebd9000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_ext_map_blocks+0x186c/0x61e0 fs/ext4/extents.c:4368
 ext4_map_blocks+0x988/0x1b30 fs/ext4/inode.c:674
 ext4_convert_unwritten_extents+0x2b7/0x5f0 fs/ext4/extents.c:4875
 ext4_convert_unwritten_io_end_vec+0x103/0x180 fs/ext4/extents.c:4914
 ext4_end_io_end fs/ext4/page-io.c:186 [inline]
 ext4_do_flush_completed_IO fs/ext4/page-io.c:259 [inline]
 ext4_end_io_rsv_work+0x2c1/0x610 fs/ext4/page-io.c:273
 process_one_work+0x6be/0xba0 kernel/workqueue.c:2325
 worker_thread+0xa59/0x1200 kernel/workqueue.c:2472
 kthread+0x411/0x500 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Modules linked in:
---[ end trace a8172276cb0c7614 ]---
RIP: 0010:ext4_ext_insert_extent+0x477e/0x47c0 fs/ext4/extents.c:2140
Code: ff 44 89 f1 80 e1 07 fe c1 38 c1 0f 8c a5 e8 ff ff 4c 89 f7 e8 73 78 d4 ff e9 98 e8 ff ff e8 19 45 95 ff 0f 0b e8 12 45 95 ff <0f> 0b e8 0b 45 95 ff 0f 0b 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 19
RSP: 0018:ffffc900014674c0 EFLAGS: 00010293
RAX: ffffffff81d484ce RBX: ffff88811d24d400 RCX: ffff88810d6762c0
RDX: 0000000000000000 RSI: 0000000000000024 RDI: 0000000000000024
RBP: ffffc90001467670 R08: ffff888130805e77 R09: 1ffff11026100bce
R10: dffffc0000000000 R11: ffffed1026100bcf R12: 0000000000000024
R13: ffff88812164cd50 R14: ffff88811d24d40c R15: 0000000000000024
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1015f53dac CR3: 000000010d61d000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400