EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
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BUG: KASAN: slab-out-of-bounds in ext4_ext_binsearch_idx fs/ext4/extents.c:796 [inline]
BUG: KASAN: slab-out-of-bounds in ext4_find_extent+0x7a9/0xda0 fs/ext4/extents.c:958
Read of size 4 at addr ffff8881e9f53da0 by task syz-executor.0/412

CPU: 0 PID: 412 Comm: syz-executor.0 Not tainted 5.4.242-syzkaller-00082-g487daef44f9f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1d8/0x241 lib/dump_stack.c:118
 print_address_description+0x8c/0x600 mm/kasan/report.c:384
 __kasan_report+0xf3/0x120 mm/kasan/report.c:516
 kasan_report+0x30/0x60 mm/kasan/common.c:653
 ext4_ext_binsearch_idx fs/ext4/extents.c:796 [inline]
 ext4_find_extent+0x7a9/0xda0 fs/ext4/extents.c:958
 ext4_clu_mapped+0xe3/0x7c0 fs/ext4/extents.c:6034
 ext4_insert_delayed_block fs/ext4/inode.c:1840 [inline]
 ext4_da_map_blocks fs/ext4/inode.c:1951 [inline]
 ext4_da_get_block_prep+0xa26/0x13f0 fs/ext4/inode.c:2015
 ext4_block_write_begin+0x68a/0x1390 fs/ext4/inode.c:1223
 ext4_da_write_begin+0x7c9/0xfe0 fs/ext4/inode.c:3185
 generic_perform_write+0x2c7/0x560 mm/filemap.c:3311
 __generic_file_write_iter+0x224/0x530 mm/filemap.c:3440
 ext4_file_write_iter+0x499/0x10e0 fs/ext4/file.c:270
 call_write_iter include/linux/fs.h:1981 [inline]
 new_sync_write fs/read_write.c:483 [inline]
 __vfs_write+0x5d3/0x750 fs/read_write.c:496
 vfs_write+0x206/0x4e0 fs/read_write.c:558
 ksys_write+0x199/0x2c0 fs/read_write.c:611
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Allocated by task 347:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 __kasan_kmalloc+0x171/0x210 mm/kasan/common.c:529
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2829 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0xd9/0x250 mm/slub.c:2842
 alloc_inode fs/inode.c:233 [inline]
 new_inode_pseudo+0x78/0x210 fs/inode.c:927
 get_pipe_inode fs/pipe.c:745 [inline]
 create_pipe_files+0x4b/0x610 fs/pipe.c:785
 __do_pipe_flags+0x46/0x200 fs/pipe.c:822
 do_pipe2+0xd0/0x300 fs/pipe.c:870
 __do_sys_pipe2 fs/pipe.c:888 [inline]
 __se_sys_pipe2 fs/pipe.c:886 [inline]
 __x64_sys_pipe2+0x56/0x60 fs/pipe.c:886
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Freed by task 357:
 save_stack mm/kasan/common.c:70 [inline]
 set_track mm/kasan/common.c:78 [inline]
 kasan_set_free_info mm/kasan/common.c:345 [inline]
 __kasan_slab_free+0x1b5/0x270 mm/kasan/common.c:487
 slab_free_hook mm/slub.c:1455 [inline]
 slab_free_freelist_hook mm/slub.c:1494 [inline]
 slab_free mm/slub.c:3080 [inline]
 kmem_cache_free+0x10b/0x2c0 mm/slub.c:3096
 destroy_inode fs/inode.c:281 [inline]
 evict+0x59d/0x6a0 fs/inode.c:592
 __dentry_kill+0x429/0x630 fs/dcache.c:579
 dentry_kill+0xb8/0x280 fs/dcache.c:673
 dput+0x154/0x2f0 fs/dcache.c:859
 __fput+0x443/0x680 fs/file_table.c:294
 task_work_run+0x140/0x170 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x190/0x1a0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode+0x199/0x200 arch/x86/entry/common.c:194
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

The buggy address belongs to the object at ffff8881e9f53ac8
 which belongs to the cache inode_cache of size 664
The buggy address is located 64 bytes to the right of
 664-byte region [ffff8881e9f53ac8, ffff8881e9f53d60)
The buggy address belongs to the page:
page:ffffea0007a7d400 refcount:1 mapcount:0 mapping:ffff8881f5cfd400 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f5cfd400
raw: 0000000000000000 0000000000140014 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Reclaimable, gfp_mask 0xd20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x18f/0x370 mm/page_alloc.c:2171
 get_page_from_freelist+0x2d13/0x2d90 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x393/0x840 mm/page_alloc.c:4891
 alloc_slab_page+0x39/0x3c0 mm/slub.c:343
 allocate_slab mm/slub.c:1683 [inline]
 new_slab+0x97/0x440 mm/slub.c:1749
 new_slab_objects mm/slub.c:2505 [inline]
 ___slab_alloc+0x2fe/0x490 mm/slub.c:2667
 __slab_alloc+0x62/0xa0 mm/slub.c:2707
 slab_alloc_node mm/slub.c:2792 [inline]
 slab_alloc mm/slub.c:2837 [inline]
 kmem_cache_alloc+0x109/0x250 mm/slub.c:2842
 alloc_inode fs/inode.c:233 [inline]
 new_inode_pseudo+0x78/0x210 fs/inode.c:927
 get_pipe_inode fs/pipe.c:745 [inline]
 create_pipe_files+0x4b/0x610 fs/pipe.c:785
 __do_pipe_flags+0x46/0x200 fs/pipe.c:822
 do_pipe2+0xd0/0x300 fs/pipe.c:870
 __do_sys_pipe2 fs/pipe.c:888 [inline]
 __se_sys_pipe2 fs/pipe.c:886 [inline]
 __x64_sys_pipe2+0x56/0x60 fs/pipe.c:886
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881e9f53c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881e9f53d00: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff8881e9f53d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff8881e9f53e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881e9f53e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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