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BUG: KASAN: slab-out-of-bounds in ext4_xattr_set_entry+0x13e2/0x1ed6 fs/ext4/xattr.c:1750
Write of size 4029 at addr ffffffe009e3f440 by task syz-executor.0/3424

CPU: 0 PID: 3424 Comm: syz-executor.0 Not tainted 5.15.0-rc1-syzkaller-00001-g64a19591a293 #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8000957e>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:112

Allocated by task 1:
(stack is not available)

The buggy address belongs to the object at ffffffe009e3f000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 1088 bytes inside of
 2048-byte region [ffffffe009e3f000, ffffffe009e3f800)
The buggy address belongs to the page:
page:ffffffcf02280e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8a038
head:ffffffcf02280e00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xffe000000010200(slab|head|node=0|zone=0|lastcpupid=0x7ff)
raw: 0ffe000000010200 0000000000000000 0000000000000122 ffffffe005602000
raw: 0000000000000000 0000000000080008 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 26905774600, free_ts 0
page_owner allocation stack trace missing
page_owner free stack trace missing

Memory state around the buggy address:
 ffffffe009e3f380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffe009e3f400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffffe009e3f480: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                           ^
 ffffffe009e3f500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffffffe009e3f580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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