==================================================================
BUG: KASAN: slab-out-of-bounds in _copy_to_iter+0x493/0x1420
Read of size 4087 at addr ffff88803c452011 by task syz-executor.2/4492

CPU: 1 PID: 4492 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
 seq_read_iter+0x71a/0x12b0
 generic_file_splice_read+0x187/0x4d0
 do_splice_to+0x1bc/0x240
 splice_direct_to_actor+0x2ac/0x8c0
 do_splice_direct+0x1b8/0x290
 do_sendfile+0xb1d/0x1280
 __x64_sys_sendfile64+0x149/0x210
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f254da41b19
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:00007f254afb7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f254db54f60 RCX: 00007f254da41b19
RDX: 0000000020000140 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00007f254da9bf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdab33e29f R14: 00007f254afb7300 R15: 0000000000022000
 </TASK>

Allocated by task 4492:
 kasan_save_stack+0x1e/0x40
 __kasan_kmalloc+0x81/0xa0
 kvmalloc_node+0x41/0x1e0
 seq_read_iter+0x81c/0x12b0
 do_iter_readv_writev+0x2f0/0x3c0
 do_iter_read+0x2fb/0x750
 vfs_readv+0xe5/0x160
 __x64_sys_preadv+0x22f/0x310
 do_syscall_64+0x3b/0x90
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Last potentially related work creation:
 kasan_save_stack+0x1e/0x40
 __kasan_record_aux_stack+0x97/0xb0
 kvfree_call_rcu+0x2c/0x700
 drop_sysctl_table+0x3c4/0x4e0
 unregister_sysctl_table+0xc0/0x190
 ipv4_sysctl_exit_net+0x82/0xb0
 ops_exit_list+0xb3/0x180
 cleanup_net+0x484/0x9e0
 process_one_work+0xa0f/0x1690
 worker_thread+0x637/0x1260
 kthread+0x2ed/0x3a0
 ret_from_fork+0x22/0x30

The buggy address belongs to the object at ffff88803c452000
 which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 17 bytes inside of
 4096-byte region [ffff88803c452000, ffff88803c453000)

The buggy address belongs to the physical page:
page:00000000709ed746 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3c450
head:00000000709ed746 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff88800d4a1841
flags: 0x100000000010200(slab|head|node=0|zone=1)
raw: 0100000000010200 ffffea00007c4a00 dead000000000003 ffff88800784c280
raw: 0000000000000000 0000000080040004 00000001ffffffff ffff88800d4a1841
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88803c452f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803c452f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88803c453000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff88803c453080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803c453100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
netlink: 'syz-executor.4': attribute type 33 has an invalid length.