detected buffer overflow in strnlen
------------[ cut here ]------------
kernel BUG at lib/string_helpers.c:1031!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 16895 Comm: syz-executor.1 Not tainted 6.5.0-rc2-next-20230718-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:fortify_panic+0x1c/0x20 lib/string_helpers.c:1031
Code: ba fd eb d7 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 53 48 89 fb e8 23 de 65 fd 48 89 de 48 c7 c7 00 2c c8 8a e8 e4 28 49 fd <0f> 0b 66 90 f3 0f 1e fa 41 55 41 54 55 53 48 89 fb e8 fe dd 65 fd
RSP: 0018:ffffc9000743fb38 EFLAGS: 00010286
RAX: 0000000000000023 RBX: ffffffff8a879260 RCX: ffffc90004775000
RDX: 0000000000000000 RSI: ffffffff816aad20 RDI: 0000000000000005
RBP: ffff88805fe4e000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: 1ffff92000e87f69
R13: 0000000000000004 R14: ffff888053d8a864 R15: ffffc9000743fb68
FS:  00007fdea511c6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3d1db12f78 CR3: 00000000285a8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 strnlen include/linux/fortify-string.h:181 [inline]
 strscpy include/linux/fortify-string.h:324 [inline]
 hfs_show_options+0x6c7/0x7a0 fs/hfs/super.c:138
 show_vfsmnt+0x364/0x470 fs/proc_namespace.c:129
 seq_read_iter+0xaf0/0x1280 fs/seq_file.c:272
 call_read_iter include/linux/fs.h:1911 [inline]
 new_sync_read fs/read_write.c:389 [inline]
 vfs_read+0x4e0/0x930 fs/read_write.c:470
 ksys_read+0x12f/0x250 fs/read_write.c:613
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fdea447cb29
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:00007fdea511c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fdea459bf80 RCX: 00007fdea447cb29
RDX: 0000000000002020 RSI: 0000000020000340 RDI: 0000000000000004
RBP: 00007fdea44c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fdea459bf80 R15: 00007ffddbcb40b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:fortify_panic+0x1c/0x20 lib/string_helpers.c:1031
Code: ba fd eb d7 66 2e 0f 1f 84 00 00 00 00 00 f3 0f 1e fa 53 48 89 fb e8 23 de 65 fd 48 89 de 48 c7 c7 00 2c c8 8a e8 e4 28 49 fd <0f> 0b 66 90 f3 0f 1e fa 41 55 41 54 55 53 48 89 fb e8 fe dd 65 fd
RSP: 0018:ffffc9000743fb38 EFLAGS: 00010286
RAX: 0000000000000023 RBX: ffffffff8a879260 RCX: ffffc90004775000
RDX: 0000000000000000 RSI: ffffffff816aad20 RDI: 0000000000000005
RBP: ffff88805fe4e000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000080000000 R11: 0000000000000001 R12: 1ffff92000e87f69
R13: 0000000000000004 R14: ffff888053d8a864 R15: ffffc9000743fb68
FS:  00007fdea511c6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e731000 CR3: 00000000285a8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400