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fix incorrect usage of alloca and a buffer overflow

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svn path=/trunk/; revision=18540
This commit is contained in:
Thomas Bluemel 2005-10-17 22:18:14 +00:00
parent 2c226cd315
commit 18d6c8993b
1 changed files with 18 additions and 17 deletions
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27
reactos/tools/nci/ncitool.c
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@ -327,7 +327,6 @@ CreateStubs(FILE * SyscallDb,
{ {
char Line[INPUT_BUFFER_SIZE]; char Line[INPUT_BUFFER_SIZE];
char *NtSyscallName; char *NtSyscallName;
char *ZwSyscallName = NULL;
char *SyscallArguments; char *SyscallArguments;
int SyscallId; int SyscallId;
unsigned StackBytes; unsigned StackBytes;
@ -345,14 +344,6 @@ CreateStubs(FILE * SyscallDb,
/* Make sure we really extracted something */ /* Make sure we really extracted something */
if (NtSyscallName) { if (NtSyscallName) {
/* Create the ZwXXX name, if requested */
if (NeedsZw) {
ZwSyscallName = alloca(strlen(NtSyscallName));
strcpy(ZwSyscallName, NtSyscallName);
ZwSyscallName[0] = 'Z';
ZwSyscallName[1] = 'w';
}
/* Create Usermode Stubs for Nt/Zw syscalls in each Usermode file */ /* Create Usermode Stubs for Nt/Zw syscalls in each Usermode file */
int i; int i;
for (i= 0; i < UserFiles; i++) { for (i= 0; i < UserFiles; i++) {
@ -364,18 +355,28 @@ CreateStubs(FILE * SyscallDb,
SyscallId | Index); SyscallId | Index);
/* If a Zw Version is needed (was specified), write it too */ /* If a Zw Version is needed (was specified), write it too */
if (ZwSyscallName) WriteUserModeStub(UserModeFiles[i], if (NeedsZw) {
ZwSyscallName,
NtSyscallName[0] = 'Z';
NtSyscallName[1] = 'w';
WriteUserModeStub(UserModeFiles[i],
NtSyscallName,
StackBytes, StackBytes,
SyscallId | Index); SyscallId | Index);
}
} }
/* Create the Kernel coutnerparts (only Zw*, Nt* are the real functions!) */ /* Create the Kernel coutnerparts (only Zw*, Nt* are the real functions!) */
if (KernelModeFile) WriteKernelModeStub(KernelModeFile, if (KernelModeFile) {
ZwSyscallName,
NtSyscallName[0] = 'Z';
NtSyscallName[1] = 'w';
WriteKernelModeStub(KernelModeFile,
NtSyscallName,
StackBytes, StackBytes,
SyscallId | Index); SyscallId | Index);
}
/* Only increase if we actually added something */ /* Only increase if we actually added something */
SyscallId++; SyscallId++;