==================================================================
BUG: KASAN: slab-out-of-bounds in init_module_from_file+0x630/0x6b0
Read of size 8 at addr ffff888043777e20 by task syz-executor.7/77222

CPU: 1 PID: 77222 Comm: syz-executor.7 Not tainted 6.4.0-next-20230630 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x91/0xf0
 print_report+0xcc/0x620
 kasan_report+0xbe/0xf0
 init_module_from_file+0x630/0x6b0
 __x64_sys_finit_module+0xee/0x160
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7fc2b414db19
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:00007fc2b16c3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 00007fc2b4260f60 RCX: 00007fc2b414db19
RDX: 0000000000000002 RSI: 0000000020000140 RDI: 0000000000000003
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 0
RBP: 00007fc2b41a7f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd5cbed81f R14: 00007fc2b16c3300 R15: 0000000000022000
 </TASK>

CPU: 0 PID: 77228 Comm: syz-executor.1 Not tainted 6.4.0-next-20230630 #1
Allocated by task 103:
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
 kasan_save_stack+0x22/0x50
Call Trace:
 kasan_set_track+0x25/0x30
 <TASK>
 __kasan_slab_alloc+0x59/0x70
 dump_stack_lvl+0xc1/0xf0
 kmem_cache_alloc+0x16b/0x370
 should_fail_ex+0x4b4/0x5b0
 getname_flags.part.0+0x50/0x4f0
 _copy_to_user+0x30/0xc0
 getname+0x92/0xe0
 simple_read_from_buffer+0xd0/0x170
 do_sys_openat2+0xec/0x1d0
 proc_fail_nth_read+0x1a2/0x240
 __x64_sys_openat+0x143/0x200
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
 vfs_read+0x1de/0x8f0

Freed by task 103:
 kasan_save_stack+0x22/0x50
 kasan_set_track+0x25/0x30
 kasan_save_free_info+0x2b/0x50
 ksys_read+0x122/0x250
 __kasan_slab_free+0x10a/0x190
 kmem_cache_free+0x10d/0x4d0
 putname+0x102/0x140
 do_syscall_64+0x3f/0x90
 do_sys_openat2+0x14a/0x1d0
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
 __x64_sys_openat+0x143/0x200
RIP: 0033:0x7fed84d1169c
 do_syscall_64+0x3f/0x90
Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 2f fd ff ff 48
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RSP: 002b:00007fed822d4170 EFLAGS: 00000246

The buggy address belongs to the object at ffff888043776600
 which belongs to the cache names_cache of size 4096
 ORIG_RAX: 0000000000000000
The buggy address is located 2080 bytes to the right of
 allocated 4096-byte region [ffff888043776600, ffff888043777600)
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fed84d1169c

The buggy address belongs to the physical page:
RDX: 000000000000000f RSI: 00007fed822d41e0 RDI: 0000000000000004
page:0000000076819d8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x43770
RBP: 00007fed822d41d0 R08: 0000000000000000 R09: 0000000000000000
head:0000000076819d8c order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
anon flags: 0x100000000010200(slab|head|node=0|zone=1)
R13: 00007ffca24a976f R14: 00007fed822d4300 R15: 0000000000022000
page_type: 0xffffffff()
 </TASK>
raw: 0100000000010200 ffff8880087ba3c0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888043777d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888043777d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888043777e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff888043777e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888043777f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
----------------
Code disassembly (best guess):
   0:	ec                   	in     (%dx),%al
   1:	28 48 89             	sub    %cl,-0x77(%rax)
   4:	54                   	push   %rsp
   5:	24 18                	and    $0x18,%al
   7:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
   c:	89 7c 24 08          	mov    %edi,0x8(%rsp)
  10:	e8 f9 fc ff ff       	callq  0xfffffd0e
  15:	48 8b 54 24 18       	mov    0x18(%rsp),%rdx
  1a:	48 8b 74 24 10       	mov    0x10(%rsp),%rsi
  1f:	41 89 c0             	mov    %eax,%r8d
  22:	8b 7c 24 08          	mov    0x8(%rsp),%edi
  26:	31 c0                	xor    %eax,%eax
  28:	0f 05                	syscall
* 2a:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax <-- trapping instruction
  30:	77 34                	ja     0x66
  32:	44 89 c7             	mov    %r8d,%edi
  35:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
  3a:	e8 2f fd ff ff       	callq  0xfffffd6e
  3f:	48                   	rex.W