==================================================================
BUG: KASAN: slab-out-of-bounds in _copy_to_iter+0x493/0x1420
Read of size 4092 at addr ffff888045894008 by task syz-executor.4/4029

CPU: 0 PID: 4029 Comm: syz-executor.4 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
 proc_reg_read_iter+0x20a/0x2e0
 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: 0033:0x7f1f1e2fab19
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:00007f1f1b870188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f1f1e40df60 RCX: 00007f1f1e2fab19
RDX: 0000000020000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007f1f1e354f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000080000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff46585e5f R14: 00007f1f1b870300 R15: 0000000000022000
 </TASK>

Allocated by task 4029:
 kasan_save_stack+0x1e/0x40
 __kasan_kmalloc+0x81/0xa0
 kvmalloc_node+0x41/0x1e0
 seq_read_iter+0x9d6/0x12b0
 proc_reg_read_iter+0x20a/0x2e0
 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

The buggy address belongs to the object at ffff888045894000
 which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 8 bytes inside of
 4096-byte region [ffff888045894000, ffff888045895000)

The buggy address belongs to the physical page:
page:00000000a5003101 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x45890
head:00000000a5003101 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff88800e20ce41
flags: 0x100000000010200(slab|head|node=0|zone=1)
raw: 0100000000010200 ffffea0001163800 dead000000000002 ffff88800784c280
raw: 0000000000000000 0000000080040004 00000001ffffffff ffff88800e20ce41
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888045894f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888045894f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888045895000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff888045895080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888045895100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
loop2: detected capacity change from 0 to 256
audit: type=1400 audit(1658128750.822:10): avc:  denied  { module_load } for  pid=4051 comm="syz-executor.3" path=2F6D656D66643A42DB2F89036CDE62CBB534EDBE4C4BA4673F4B29A0F09B3859B55AE11253F547CCF3E902680BCA2896E143DF1CEA8543FB1013FA0316CD05202864656C6574656429 dev="tmpfs" ino=10 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:tmpfs_t:s0 tclass=system permissive=1
Invalid ELF header magic: != ELF
FAT-fs (loop2): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)