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ntoskrnl.exe: Protect the two relocated pages independently. 

They may have different protection flags.

This fixes a regression introduced by 22dfb0df10.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49198
Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2020-05-22 09:52:56 -05:00 committed by Alexandre Julliard
parent 9ddceebe52
commit c750ae6b9d
1 changed files with 6 additions and 4 deletions
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10
dlls/ntoskrnl.exe/ntoskrnl.c
View File

@ -3413,8 +3413,8 @@ static NTSTATUS perform_relocations( void *module, SIZE_T len, ULONG page_size )
while (rel < end - 1 && rel->SizeOfBlock)
{
void *page = get_rva( module, rel->VirtualAddress );
DWORD old_prot;
char *page = get_rva( module, rel->VirtualAddress );
DWORD old_prot1, old_prot2;
if (rel->VirtualAddress >= len)
{
@ -3424,10 +3424,12 @@ static NTSTATUS perform_relocations( void *module, SIZE_T len, ULONG page_size )
/* Relocation entries may hang over the end of the page, so we need to
* protect two pages. */
VirtualProtect( page, page_size * 2, PAGE_READWRITE, &old_prot );
VirtualProtect( page, page_size, PAGE_READWRITE, &old_prot1 );
VirtualProtect( page + page_size, page_size, PAGE_READWRITE, &old_prot2 );
rel = LdrProcessRelocationBlock( page, (rel->SizeOfBlock - sizeof(*rel)) / sizeof(USHORT),
(USHORT *)(rel + 1), delta );
VirtualProtect( page, page_size * 2, old_prot, &old_prot );
VirtualProtect( page, page_size, old_prot1, &old_prot1 );
VirtualProtect( page + page_size, page_size, old_prot2, &old_prot2 );
if (!rel) return STATUS_INVALID_IMAGE_FORMAT;
}