usercopy: Kernel memory overwrite attempt detected to SLUB object 'kmalloc-16' (offset 8, size 16)!
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kernel BUG at mm/usercopy.c:102!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 PID: 5455 Comm: syz-executor.4 Not tainted 6.9.0-rc2-next-20240403-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:usercopy_abort+0x84/0x90 mm/usercopy.c:102
Code: 49 89 ce 48 c7 c3 60 27 d8 8b 48 0f 44 de 48 c7 c7 00 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 81 ac 75 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90004effd78 EFLAGS: 00010286
RAX: 0000000000000063 RBX: ffffffff8bd82760 RCX: 9738bc3d8fd18a00
RDX: ffffc90009c2a000 RSI: 0000000000002d5e RDI: 0000000000002d5f
RBP: 0000000000000008 R08: ffffffff81760b5c R09: 1ffff920009dff4c
R10: dffffc0000000000 R11: fffff520009dff4d R12: ffffea0000ba0340
R13: 0000000000000010 R14: 0000000000000008 R15: 0000000000000010
FS:  00007f44f74796c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa34dd03000 CR3: 000000002c288000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __check_heap_object+0xb1/0x100 mm/slub.c:5482
 check_heap_object mm/usercopy.c:196 [inline]
 __check_object_size+0x1e3/0x900 mm/usercopy.c:251
 check_object_size include/linux/thread_info.h:215 [inline]
 check_copy_size include/linux/thread_info.h:251 [inline]
 copy_from_user include/linux/uaccess.h:182 [inline]
 handle_to_path fs/fhandle.c:203 [inline]
 do_handle_open+0x1f6/0x660 fs/fhandle.c:226
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x72/0x7a
RIP: 0033:0x7f44f667dde9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f44f74790c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000130
RAX: ffffffffffffffda RBX: 00007f44f67abf80 RCX: 00007f44f667dde9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007f44f66ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f44f67abf80 R15: 00007ffe17824b38
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:usercopy_abort+0x84/0x90 mm/usercopy.c:102
Code: 49 89 ce 48 c7 c3 60 27 d8 8b 48 0f 44 de 48 c7 c7 00 26 d8 8b 4c 89 de 48 89 c1 41 52 41 56 53 e8 81 ac 75 09 48 83 c4 18 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90004effd78 EFLAGS: 00010286
RAX: 0000000000000063 RBX: ffffffff8bd82760 RCX: 9738bc3d8fd18a00
RDX: ffffc90009c2a000 RSI: 0000000000002d5e RDI: 0000000000002d5f
RBP: 0000000000000008 R08: ffffffff81760b5c R09: 1ffff920009dff4c
R10: dffffc0000000000 R11: fffff520009dff4d R12: ffffea0000ba0340
R13: 0000000000000010 R14: 0000000000000008 R15: 0000000000000010
FS:  00007f44f74796c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f39aaad56c6 CR3: 000000002c288000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400