EXT4-fs error (device loop0): __ext4_get_inode_loc:4426: comm kworker/u4:3: Invalid inode table block 0 in block_group 0
==================================================================
BUG: KASAN: use-after-free in ext4_ext_binsearch fs/ext4/extents.c:826 [inline]
BUG: KASAN: use-after-free in ext4_find_extent+0xbab/0xdb0 fs/ext4/extents.c:945
Read of size 4 at addr ffff8881226a2058 by task kworker/u4:3/351

CPU: 0 PID: 351 Comm: kworker/u4:3 Not tainted 5.10.209-syzkaller-999849-gdd976ecce2ce #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Workqueue: writeback wb_workfn (flush-7:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0x179/0x1c0 mm/kasan/report.c:452
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 ext4_ext_binsearch fs/ext4/extents.c:826 [inline]
 ext4_find_extent+0xbab/0xdb0 fs/ext4/extents.c:945
 ext4_ext_map_blocks+0x26d/0x6be0 fs/ext4/extents.c:4097
 ext4_map_blocks+0xaa7/0x1ec0 fs/ext4/inode.c:646
 mpage_map_one_extent fs/ext4/inode.c:2440 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2493 [inline]
 ext4_writepages+0x148b/0x3c00 fs/ext4/inode.c:2861
 do_writepages+0x12e/0x270 mm/page-writeback.c:2358
 __writeback_single_inode+0xd7/0xac0 fs/fs-writeback.c:1470
 writeback_sb_inodes+0x99c/0x16b0 fs/fs-writeback.c:1733
 wb_writeback+0x404/0xc60 fs/fs-writeback.c:1908
 wb_do_writeback fs/fs-writeback.c:2053 [inline]
 wb_workfn+0x3d9/0x1110 fs/fs-writeback.c:2094
 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301
 worker_thread+0xaea/0x1510 kernel/workqueue.c:2447
 kthread+0x34b/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299

The buggy address belongs to the page:
page:ffffea000489a880 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x1226a2
flags: 0x4000000000000000()
raw: 4000000000000000 ffff8881f725ab70 ffffea000489a848 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)

Memory state around the buggy address:
 ffff8881226a1f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881226a1f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881226a2000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                                    ^
 ffff8881226a2080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881226a2100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2452!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 351 Comm: kworker/u4:3 Tainted: G    B             5.10.209-syzkaller-999849-gdd976ecce2ce #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Workqueue: writeback wb_workfn (flush-7:0)
RIP: 0010:mpage_map_one_extent fs/ext4/inode.c:2452 [inline]
RIP: 0010:mpage_map_and_submit_extent fs/ext4/inode.c:2493 [inline]
RIP: 0010:ext4_writepages+0x3b44/0x3c00 fs/ext4/inode.c:2861
Code: 00 74 08 48 89 df e8 8b f0 c9 ff 48 8b 3b 48 8b 74 24 28 48 8b 54 24 50 44 89 e1 45 89 f8 e8 13 d2 07 00 eb 5d e8 ec 78 8c ff <0f> 0b e8 e5 78 8c ff eb 3b e8 de 78 8c ff eb 77 e8 d7 78 8c ff 31
RSP: 0018:ffffc90000f570a0 EFLAGS: 00010293
RAX: ffffffff81de2f04 RBX: dffffc0000000000 RCX: ffff88810cad8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000f57490 R08: ffffffff81de0b09 R09: ffffed102397bd6e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000f573b0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200110bf CR3: 000000010c8de000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_writepages+0x12e/0x270 mm/page-writeback.c:2358
 __writeback_single_inode+0xd7/0xac0 fs/fs-writeback.c:1470
 writeback_sb_inodes+0x99c/0x16b0 fs/fs-writeback.c:1733
 wb_writeback+0x404/0xc60 fs/fs-writeback.c:1908
 wb_do_writeback fs/fs-writeback.c:2053 [inline]
 wb_workfn+0x3d9/0x1110 fs/fs-writeback.c:2094
 process_one_work+0x6dc/0xbd0 kernel/workqueue.c:2301
 worker_thread+0xaea/0x1510 kernel/workqueue.c:2447
 kthread+0x34b/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299
Modules linked in:
---[ end trace 39edc91353ed2caa ]---
RIP: 0010:mpage_map_one_extent fs/ext4/inode.c:2452 [inline]
RIP: 0010:mpage_map_and_submit_extent fs/ext4/inode.c:2493 [inline]
RIP: 0010:ext4_writepages+0x3b44/0x3c00 fs/ext4/inode.c:2861
Code: 00 74 08 48 89 df e8 8b f0 c9 ff 48 8b 3b 48 8b 74 24 28 48 8b 54 24 50 44 89 e1 45 89 f8 e8 13 d2 07 00 eb 5d e8 ec 78 8c ff <0f> 0b e8 e5 78 8c ff eb 3b e8 de 78 8c ff eb 77 e8 d7 78 8c ff 31
RSP: 0018:ffffc90000f570a0 EFLAGS: 00010293
RAX: ffffffff81de2f04 RBX: dffffc0000000000 RCX: ffff88810cad8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000f57490 R08: ffffffff81de0b09 R09: ffffed102397bd6e
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc90000f573b0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200110bf CR3: 000000010c8de000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400