EXT4-fs (loop0): Delayed block allocation failed for inode 19 at logical offset 0 with max blocks 1 with error 117
EXT4-fs (loop0): This should not happen!! Data will be lost
==================================================================
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 ffff8881248ae000 by task kworker/u4:0/7

CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.10.194-syzkaller-989230-ga27512601c2d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: writeback wb_workfn (flush-7:2)
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:ffffea0004922b80 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x1 pfn:0x1248ae
flags: 0x4000000000000000()
raw: 4000000000000000 ffffea0004924308 ffffea0004930108 0000000000000000
raw: 0000000000000001 0000000000000001 00000000ffffff7f 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Movable, gfp_mask 0x101cca(GFP_HIGHUSER_MOVABLE|__GFP_WRITE), pid 1176, ts 59321576663, free_ts 59702802544
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x166/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5346
 __alloc_pages include/linux/gfp.h:544 [inline]
 __alloc_pages_node include/linux/gfp.h:557 [inline]
 alloc_pages_node include/linux/gfp.h:571 [inline]
 alloc_pages include/linux/gfp.h:590 [inline]
 __page_cache_alloc include/linux/pagemap.h:290 [inline]
 pagecache_get_page+0x669/0x950 mm/filemap.c:1848
 grab_cache_page_write_begin+0x5d/0xa0 mm/filemap.c:3456
 ext4_write_begin+0x29f/0x1730 fs/ext4/inode.c:1184
 ext4_da_write_begin+0x49d/0xf60 fs/ext4/inode.c:3021
 generic_perform_write+0x2cd/0x570 mm/filemap.c:3506
 ext4_buffered_write_iter+0x482/0x610 fs/ext4/file.c:271
 ext4_file_write_iter+0x193/0x1c80 fs/ext4/file.c:685
 call_write_iter include/linux/fs.h:1976 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0xb55/0xe70 fs/read_write.c:605
 ksys_write+0x199/0x2c0 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1349 [inline]
 free_pcp_prepare mm/page_alloc.c:1421 [inline]
 free_unref_page_prepare+0x2ae/0x2d0 mm/page_alloc.c:3336
 free_unref_page_list+0x122/0xb20 mm/page_alloc.c:3443
 release_pages+0xea0/0xef0 mm/swap.c:1103
 __pagevec_release+0x84/0x100 mm/swap.c:1123
 pagevec_release include/linux/pagevec.h:88 [inline]
 truncate_inode_pages_range+0xa81/0x1ae0 mm/truncate.c:367
 truncate_inode_pages mm/truncate.c:473 [inline]
 truncate_inode_pages_final+0xc1/0xd0 mm/truncate.c:524
 ext4_evict_inode+0x3d7/0x1730 fs/ext4/inode.c:214
 evict+0x2a3/0x6c0 fs/inode.c:577
 dispose_list fs/inode.c:612 [inline]
 evict_inodes+0x5d1/0x650 fs/inode.c:662
 generic_shutdown_super+0x9c/0x2d0 fs/super.c:454
 kill_block_super+0x7e/0xe0 fs/super.c:1456
 deactivate_locked_super+0xad/0x110 fs/super.c:335
 deactivate_super+0xbe/0xf0 fs/super.c:366
 cleanup_mnt+0x45c/0x510 fs/namespace.c:1118
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125
 task_work_run+0x129/0x190 kernel/task_work.c:164

Memory state around the buggy address:
 ffff8881248adf00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881248adf80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881248ae000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff8881248ae080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881248ae100: 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: 0 PID: 7 Comm: kworker/u4:0 Tainted: G    B             5.10.194-syzkaller-989230-ga27512601c2d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: writeback wb_workfn (flush-7:2)
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 7b 05 ca ff 48 8b 3b 48 8b 74 24 28 48 8b 54 24 50 44 89 e1 45 89 f8 e8 f3 cb 07 00 eb 5d e8 5c b2 8c ff <0f> 0b e8 55 b2 8c ff eb 3b e8 4e b2 8c ff eb 77 e8 47 b2 8c ff 31
RSP: 0018:ffffc900000770a0 EFLAGS: 00010293
RAX: ffffffff81ddedd4 RBX: dffffc0000000000 RCX: ffff8881002513c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000077490 R08: ffffffff81ddc9d9 R09: ffffed1024c9125b
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900000773b0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0012ac000 CR3: 000000011a5e6000 CR4: 00000000003506b0
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 3982758b91ceb99b ]---
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 7b 05 ca ff 48 8b 3b 48 8b 74 24 28 48 8b 54 24 50 44 89 e1 45 89 f8 e8 f3 cb 07 00 eb 5d e8 5c b2 8c ff <0f> 0b e8 55 b2 8c ff eb 3b e8 4e b2 8c ff eb 77 e8 47 b2 8c ff 31
RSP: 0018:ffffc900000770a0 EFLAGS: 00010293
RAX: ffffffff81ddedd4 RBX: dffffc0000000000 RCX: ffff8881002513c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000077490 R08: ffffffff81ddc9d9 R09: ffffed1024c9125b
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900000773b0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0012ac000 CR3: 000000011a5e6000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400