==================================================================
BUG: KASAN: use-after-free in init_module_from_file+0x630/0x6b0
Read of size 8 at addr ffff8880423d7e20 by task syz-executor.5/4207

CPU: 1 PID: 4207 Comm: syz-executor.5 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: 0033:0x7fa898d55b19
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:00007fa8962cb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 00007fa898e68f60 RCX: 00007fa898d55b19
RDX: 0000000000000003 RSI: 00000000200016c0 RDI: 0000000000000003
RBP: 00007fa898daff6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe2e86ff6f R14: 00007fa8962cb300 R15: 0000000000022000
 </TASK>

The buggy address belongs to the physical page:
page:000000002520ae4a refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x423d7
flags: 0x100000000000000(node=0|zone=1)
page_type: 0xffffffff()
raw: 0100000000000000 0000000000000000 ffffea000108f5c8 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8880423d7d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880423d7d80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8880423d7e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                               ^
 ffff8880423d7e80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8880423d7f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
general protection fault, probably for non-canonical address 0xeac826e83f43c1fd: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: maybe wild-memory-access in range [0x56415741fa1e0fe8-0x56415741fa1e0fef]
CPU: 1 PID: 4207 Comm: syz-executor.5 Tainted: G    B              6.4.0-next-20230630 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:init_module_from_file+0x1c1/0x6b0
Code: 0f 84 c4 01 00 00 e8 5e 36 12 00 4d 89 e7 49 83 ef 08 74 61 e8 50 36 12 00 4c 89 fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 04 00 00 4d 3b 2f 0f 84 ae 00 00 00 e8 27 36
RSP: 0018:ffff88800feb7d28 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 00000000000000ab RCX: ffffc900035da000
RDX: 0ac82ae83f43c1fd RSI: ffffffff813a30f0 RDI: ffffffff810811d0
RBP: ffff88800e119680 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880423d7e28
R13: ffff88801bf489f0 R14: ffffffff87b7c1f8 R15: 56415741fa1e0feb
FS:  00007fa8962cb700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e52a000 CR3: 00000000401ea000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 __x64_sys_finit_module+0xee/0x160
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x6e/0xd8
RIP: 0033:0x7fa898d55b19
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:00007fa8962cb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 00007fa898e68f60 RCX: 00007fa898d55b19
RDX: 0000000000000003 RSI: 00000000200016c0 RDI: 0000000000000003
RBP: 00007fa898daff6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe2e86ff6f R14: 00007fa8962cb300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:init_module_from_file+0x1c1/0x6b0
Code: 0f 84 c4 01 00 00 e8 5e 36 12 00 4d 89 e7 49 83 ef 08 74 61 e8 50 36 12 00 4c 89 fa 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 5d 04 00 00 4d 3b 2f 0f 84 ae 00 00 00 e8 27 36
RSP: 0018:ffff88800feb7d28 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: 00000000000000ab RCX: ffffc900035da000
RDX: 0ac82ae83f43c1fd RSI: ffffffff813a30f0 RDI: ffffffff810811d0
RBP: ffff88800e119680 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880423d7e28
R13: ffff88801bf489f0 R14: ffffffff87b7c1f8 R15: 56415741fa1e0feb
FS:  00007fa8962cb700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e52a000 CR3: 00000000401ea000 CR4: 0000000000350ee0
note: syz-executor.5[4207] exited with preempt_count 1
netlink: 36 bytes leftover after parsing attributes in process `syz-executor.3'.
----------------
Code disassembly (best guess):
   0:	0f 84 c4 01 00 00    	je     0x1ca
   6:	e8 5e 36 12 00       	callq  0x123669
   b:	4d 89 e7             	mov    %r12,%r15
   e:	49 83 ef 08          	sub    $0x8,%r15
  12:	74 61                	je     0x75
  14:	e8 50 36 12 00       	callq  0x123669
  19:	4c 89 fa             	mov    %r15,%rdx
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 5d 04 00 00    	jne    0x491
  34:	4d 3b 2f             	cmp    (%r15),%r13
  37:	0f 84 ae 00 00 00    	je     0xeb
  3d:	e8                   	.byte 0xe8
  3e:	27                   	(bad)
  3f:	36                   	ss