==================================================================
BUG: KASAN: slab-out-of-bounds in ext4_xattr_set_entry+0x13e2/0x1ec4 fs/ext4/xattr.c:1746
Write of size 4029 at addr ffffffe00b847940 by task syz-executor.1/6814

CPU: 0 PID: 6814 Comm: syz-executor.1 Not tainted 5.14.0-rc1-syzkaller-00003-g417166ddec02 #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff800095ae>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:112

Allocated by task 6590:
(stack is not available)

Freed by task 3445:
(stack is not available)

The buggy address belongs to the object at ffffffe00b846000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 2368 bytes to the right of
 4096-byte region [ffffffe00b846000, ffffffe00b847000)
The buggy address belongs to the page:
page:ffffffcf022e9000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8ba40
head:ffffffcf022e9000 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xffe000000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff)
raw: 0ffe000000010200 0000000000000100 0000000000000122 ffffffe005602140
raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 11, ts 3646770996700, free_ts 3646266929600
page_owner allocation stack trace missing
page_owner free stack trace missing

Memory state around the buggy address:
 ffffffe00b847800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffffffe00b847880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffffffe00b847900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                           ^
 ffffffe00b847980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffffffe00b847a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
EXT4-fs error (device vda): ext4_xattr_ibody_find:2180: inode #649: comm syz-executor.1: corrupted in-inode xattr