------------[ cut here ]------------
kernel BUG at fs/ext4/extents_status.c:968!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4433 Comm: syz.9.1016 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:ext4_es_cache_extent+0x57b/0x5d0 fs/ext4/extents_status.c:968
Code: e8 03 42 80 3c 38 00 74 08 48 89 df e8 ee 3e d2 ff 48 8b 3b 48 8b 74 24 28 48 8d 54 24 60 e8 fc 72 0c 00 eb 13 e8 b5 be 97 ff <0f> 0b e8 ae be 97 ff eb 28 e8 a7 be 97 ff 31 f6 65 ff 0d da 78 35
RSP: 0018:ffffc90000d071a0 EFLAGS: 00010283
RAX: ffffffff81ccf49b RBX: 000000000000003b RCX: 0000000000080000
RDX: ffffc9000b814000 RSI: 0000000000001293 RDI: 0000000000001294
RBP: ffffc90000d072a8 R08: ffffc90000d07217 R09: ffffc90000d07200
R10: dffffc0000000000 R11: fffff520001a0e43 R12: ffff888126e833c8
R13: 47ffffffffffffff R14: 0000000000000039 R15: dffffc0000000000
FS:  00007f18225256c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1822525d58 CR3: 000000011fff3000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_cache_extents fs/ext4/extents.c:516 [inline]
 __read_extent_tree_block+0x44b/0x790 fs/ext4/extents.c:563
 ext4_find_extent+0x8b9/0xe20 fs/ext4/extents.c:928
 ext4_ext_map_blocks+0x20b/0x5dd0 fs/ext4/extents.c:4166
 ext4_map_blocks+0x985/0x1bd0 fs/ext4/inode.c:674
 mpage_map_one_extent fs/ext4/inode.c:2452 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2505 [inline]
 ext4_writepages+0x136a/0x2eb0 fs/ext4/inode.c:2873
 do_writepages+0x128/0x280 mm/page-writeback.c:2380
 __filemap_fdatawrite_range+0x2a0/0x350 mm/filemap.c:427
 filemap_write_and_wait_range+0x65/0x290 mm/filemap.c:660
 ext4_insert_range fs/ext4/extents.c:5550 [inline]
 ext4_fallocate+0xcdb/0x1a70 fs/ext4/extents.c:4774
 vfs_fallocate+0x4b4/0x590 fs/open.c:310
 ksys_fallocate fs/open.c:333 [inline]
 __do_sys_fallocate fs/open.c:341 [inline]
 __se_sys_fallocate fs/open.c:339 [inline]
 __x64_sys_fallocate+0xc0/0x110 fs/open.c:339
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f1823b0c819
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:00007f1822525028 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f1823d86180 RCX: 00007f1823b0c819
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000004
RBP: 00007f1823ba2c91 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000a800000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1823d86218 R14: 00007f1823d86180 R15: 00007ffe74129088
Modules linked in:
---[ end trace a7f2c03f6734faf3 ]---
RIP: 0010:ext4_es_cache_extent+0x57b/0x5d0 fs/ext4/extents_status.c:968
Code: e8 03 42 80 3c 38 00 74 08 48 89 df e8 ee 3e d2 ff 48 8b 3b 48 8b 74 24 28 48 8d 54 24 60 e8 fc 72 0c 00 eb 13 e8 b5 be 97 ff <0f> 0b e8 ae be 97 ff eb 28 e8 a7 be 97 ff 31 f6 65 ff 0d da 78 35
RSP: 0018:ffffc90000d071a0 EFLAGS: 00010283
RAX: ffffffff81ccf49b RBX: 000000000000003b RCX: 0000000000080000
RDX: ffffc9000b814000 RSI: 0000000000001293 RDI: 0000000000001294
RBP: ffffc90000d072a8 R08: ffffc90000d07217 R09: ffffc90000d07200
R10: dffffc0000000000 R11: fffff520001a0e43 R12: ffff888126e833c8
R13: 47ffffffffffffff R14: 0000000000000039 R15: dffffc0000000000
FS:  00007f18225256c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1822525d58 CR3: 000000011fff3000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400