[reactos] 02/11: [NTOS:IO] Remove final NULL char of PDO name before writing to registry

[Hervé Poussineau]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=a86c3794a6d47bd5c9f4c0...

commit a86c3794a6d47bd5c9f4c06eacd6eecfc49181b4
Author:     Hervé Poussineau [e-mail]
AuthorDate: Thu Oct 7 20:50:38 2021 +0200
Commit:     Hervé Poussineau [e-mail]
CommitDate: Thu Oct 14 23:39:30 2021 +0200

[NTOS:IO] Remove final NULL char of PDO name before writing to registry

Otherwise, if a PDO has no name (bad!), you'll see two "(Default)" entries
    in HKLM\HARDWARE\RESOURCEMAP\PnP Manager\PnpManager
---
 ntoskrnl/io/pnpmgr/pnpres.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ntoskrnl/io/pnpmgr/pnpres.c b/ntoskrnl/io/pnpmgr/pnpres.c
index 1cdf1d85b84..57eabfe69c2 100644
--- a/ntoskrnl/io/pnpmgr/pnpres.c
+++ b/ntoskrnl/io/pnpmgr/pnpres.c
@@ -915,7 +915,7 @@ IopUpdateResourceMap(
             ASSERT(FALSE);
         }

-        NameU.Length = (USHORT)OldLength;
+        NameU.Length = (USHORT)OldLength - sizeof(UNICODE_NULL); /* Remove final NULL */

RtlAppendUnicodeStringToString(&NameU, &RawSuffix);

@@ -933,7 +933,7 @@ IopUpdateResourceMap(
         }

/* "Remove" the suffix by setting the length back to what it used to be */
-        NameU.Length = (USHORT)OldLength;
+        NameU.Length = (USHORT)OldLength - sizeof(UNICODE_NULL); /* Remove final NULL */

RtlAppendUnicodeStringToString(&NameU, &TranslatedSuffix);