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- Add a check for an incorrect virtual size. Currently ReactOS's floppy.sys has such an incorrect section.

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svn path=/trunk/; revision=30691
This commit is contained in:
Aleksey Bragin 2007-11-23 13:39:31 +00:00
parent d4e96ba358
commit 787a5cdaa4
1 changed files with 12 additions and 3 deletions
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15
reactos/lib/rossym/frommem.c
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@ -24,8 +24,9 @@ RosSymCreateFromMem(PVOID ImageStart, ULONG_PTR ImageSize, PROSSYM_INFO *RosSymI
PIMAGE_DOS_HEADER DosHeader;
PIMAGE_NT_HEADERS NtHeaders;
PIMAGE_SECTION_HEADER SectionHeader;
unsigned SectionIndex;
char SectionName[IMAGE_SIZEOF_SHORT_NAME];
ULONG SectionIndex;
BOOLEAN RosSymSectionFound = FALSE;
CHAR SectionName[IMAGE_SIZEOF_SHORT_NAME];
/* Check if MZ header is valid */
DosHeader = (PIMAGE_DOS_HEADER) ImageStart;
@ -58,11 +59,13 @@ RosSymCreateFromMem(PVOID ImageStart, ULONG_PTR ImageSize, PROSSYM_INFO *RosSymI
{
if (0 == memcmp(SectionName, SectionHeader->Name, IMAGE_SIZEOF_SHORT_NAME))
{
RosSymSectionFound = TRUE;
break;
}
SectionHeader++;
}
if (NtHeaders->FileHeader.NumberOfSections <= SectionIndex)
if (!RosSymSectionFound)
{
DPRINT("No %s section found\n", ROSSYM_SECTION_NAME);
return FALSE;
@ -76,6 +79,12 @@ RosSymCreateFromMem(PVOID ImageStart, ULONG_PTR ImageSize, PROSSYM_INFO *RosSymI
return FALSE;
}
if (SectionHeader->VirtualAddress + SectionHeader->Misc.VirtualSize > ImageSize)
{
DPRINT("Bad %s section virtual size!\n", ROSSYM_SECTION_NAME);
return FALSE;
}
/* Load it */
return RosSymCreateFromRaw((char *) ImageStart + SectionHeader->VirtualAddress,
SectionHeader->SizeOfRawData, RosSymInfo);