==================================================================
BUG: KASAN: slab-out-of-bounds in dx_insert_block fs/ext4/namei.c:1358 [inline]
BUG: KASAN: slab-out-of-bounds in do_split+0x1db1/0x2310 fs/ext4/namei.c:2042
Read of size 157024 at addr ffff88812870e028 by task syz.5.523/2256

CPU: 0 PID: 2256 Comm: syz.5.523 Not tainted 5.10.226-syzkaller-00001-g6a01908517df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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
 kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189
 memmove+0x2d/0x70 mm/kasan/shadow.c:54
 dx_insert_block fs/ext4/namei.c:1358 [inline]
 do_split+0x1db1/0x2310 fs/ext4/namei.c:2042
 make_indexed_dir+0xe3a/0x1500 fs/ext4/namei.c:2346
 ext4_add_entry+0xdcf/0x1280 fs/ext4/namei.c:2458
 __ext4_link+0x4e9/0x790 fs/ext4/namei.c:3645
 ext4_link+0x1f3/0x290 fs/ext4/namei.c:3686
 vfs_link+0x68f/0x890 fs/namei.c:4213
 do_linkat+0x471/0x8b0 fs/namei.c:4281
 __do_sys_link fs/namei.c:4310 [inline]
 __se_sys_link fs/namei.c:4308 [inline]
 __x64_sys_link+0x68/0x80 fs/namei.c:4308
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f3b51fc5759
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3b51a46038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f3b5217cf80 RCX: 00007f3b51fc5759
RDX: 0000000000000000 RSI: 0000000020000bc0 RDI: 0000000020001240
RBP: 00007f3b5203875e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f3b5217cf80 R15: 00007ffe9a5f1248

The buggy address belongs to the page:
page:ffffea0004a1c380 refcount:3 mapcount:1 mapping:ffff8881092f06d0 index:0x1 pfn:0x12870e
aops:def_blk_aops ino:0
flags: 0x400000000032201e(referenced|uptodate|dirty|lru|private|mappedtodisk|unevictable|mlocked)
raw: 400000000032201e ffff88810019a040 ffffea000437ff48 ffff8881092f06d0
raw: 0000000000000001 ffff88811c3ec1f8 0000000300000000 ffff888100144000
page dumped because: kasan: bad access detected
page->mem_cgroup:ffff888100144000
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 2257, ts 153425780406, free_ts 153383771139
 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:5348
 __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]
 page_cache_ra_unbounded+0x363/0x890 mm/readahead.c:226
 do_page_cache_ra mm/readahead.c:277 [inline]
 force_page_cache_ra+0x373/0x3e0 mm/readahead.c:308
 page_cache_sync_ra+0x254/0x2c0 mm/readahead.c:582
 page_cache_sync_readahead include/linux/pagemap.h:837 [inline]
 generic_file_buffered_read+0x6da/0x2ad0 mm/filemap.c:2250
 generic_file_read_iter+0x107/0x6b0 mm/filemap.c:2568
 blkdev_read_iter+0x135/0x190 fs/block_dev.c:1956
 call_read_iter include/linux/fs.h:2015 [inline]
 new_sync_read fs/read_write.c:415 [inline]
 vfs_read+0x990/0xba0 fs/read_write.c:496
 ksys_read+0x199/0x2c0 fs/read_write.c:634
 __do_sys_read fs/read_write.c:644 [inline]
 __se_sys_read fs/read_write.c:642 [inline]
 __x64_sys_read+0x7b/0x90 fs/read_write.c:642
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
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 mm/page_alloc.c:3391 [inline]
 free_the_page+0x9e/0x370 mm/page_alloc.c:5407
 __free_pages+0x67/0xc0 mm/page_alloc.c:5418
 __free_slab+0xcf/0x190 mm/slub.c:1894
 free_slab mm/slub.c:1909 [inline]
 discard_slab mm/slub.c:1915 [inline]
 unfreeze_partials+0x15e/0x190 mm/slub.c:2410
 put_cpu_partial+0xbf/0x180 mm/slub.c:2446
 __slab_free+0x2c8/0x3a0 mm/slub.c:3095
 do_slab_free mm/slub.c:3191 [inline]
 ___cache_free+0x111/0x130 mm/slub.c:3210
 qlink_free+0x50/0x90 mm/kasan/quarantine.c:157
 qlist_free_all+0x47/0xb0 mm/kasan/quarantine.c:176
 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:283
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:440
 kasan_slab_alloc include/linux/kasan.h:244 [inline]
 slab_post_alloc_hook+0x61/0x2f0 mm/slab.h:583
 slab_alloc_node mm/slub.c:2947 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc_trace+0x163/0x2e0 mm/slub.c:2972
 kmalloc include/linux/slab.h:552 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 inet_alloc_ifa net/ipv4/devinet.c:218 [inline]
 rtm_to_ifaddr net/ipv4/devinet.c:854 [inline]
 inet_rtm_newaddr+0x2bb/0x16c0 net/ipv4/devinet.c:939
 rtnetlink_rcv_msg+0x955/0xc50 net/core/rtnetlink.c:5607

Memory state around the buggy address:
 ffff88812870ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88812870f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88812870f080: 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00
                         ^
 ffff88812870f100: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
 ffff88812870f180: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
EXT4-fs error (device loop5): ext4_dx_csum_set:529: inode #2: comm syz.5.523: dir seems corrupt?  Run e2fsck -D.