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BUG: KASAN: slab-out-of-bounds in _copy_to_iter+0x493/0x1420
Read of size 4060 at addr ffff88800eb9b824 by task syz-executor.2/4292

CPU: 1 PID: 4292 Comm: syz-executor.2 Not tainted 5.19.0-rc6-next-20220715 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x8b/0xb3
 print_report.cold+0x5e/0x5e5
 kasan_report+0xb1/0x1c0
 kasan_check_range+0x35/0x1c0
 memcpy+0x20/0x60
 _copy_to_iter+0x493/0x1420
 simple_copy_to_iter+0x4c/0x70
 __skb_datagram_iter+0x122/0x880
 skb_copy_datagram_iter+0x80/0x270
 netlink_recvmsg+0x1c3/0xd60
 sock_recvmsg+0x149/0x180
 sock_read_iter+0x2b3/0x3b0
 generic_file_splice_read+0x187/0x4d0
 sock_splice_read+0xf0/0x120
 do_splice_to+0x1bc/0x240
 splice_file_to_pipe+0x104/0x120
 do_sendfile+0x42a/0x1280
 __x64_sys_sendfile64+0x1d1/0x210
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f22bf502b19
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f22bca78188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f22bf615f60 RCX: 00007f22bf502b19
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007f22bf55cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000088 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd4e7090bf R14: 00007f22bca78300 R15: 0000000000022000
 </TASK>

Allocated by task 111:
 kasan_save_stack+0x1e/0x40
 __kasan_kmalloc+0x81/0xa0
 kernfs_fop_open+0x2fa/0xec0
 do_dentry_open+0x4ae/0x1260
 path_openat+0x19e1/0x2800
 do_filp_open+0x1b6/0x410
 do_sys_openat2+0x171/0x4c0
 __x64_sys_openat+0x13f/0x1f0
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff88800eb9b800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 36 bytes inside of
 512-byte region [ffff88800eb9b800, ffff88800eb9ba00)

The buggy address belongs to the physical page:
page:00000000596ead99 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb98
head:00000000596ead99 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x100000000010200(slab|head|node=0|zone=1)
raw: 0100000000010200 dead000000000100 dead000000000122 ffff888007841c80
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88800eb9b900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88800eb9b980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88800eb9ba00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff88800eb9ba80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88800eb9bb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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