From c6b7b7586e48692dab63a873ba1b70c1142362f2 Mon Sep 17 00:00:00 2001 From: Bill Zissimopoulos Date: Wed, 17 Apr 2019 14:40:06 -0700 Subject: [PATCH] sys: ea: buffers from user mode fs can have zero length --- src/sys/util.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/sys/util.c b/src/sys/util.c index 58d84127..62ed2463 100644 --- a/src/sys/util.c +++ b/src/sys/util.c @@ -683,6 +683,10 @@ NTSTATUS FspEaBufferFromFileSystemValidate( *PErrorOffset = 0; + /* EA buffers from the user mode file system are allowed to have zero length */ + if (0 == Length) + return STATUS_SUCCESS; + /* EA buffers from the user mode file system are allowed to end with NextEntryOffset != 0 */ for (PFILE_FULL_EA_INFORMATION Ea = Buffer, EaEnd = (PVOID)((PUINT8)Ea + Length); EaEnd > Ea; Ea = FSP_NEXT_EA(Ea, EaEnd))