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ntdll: Add a magic number to validate timer queue pointers.

This commit is contained in:
Alexandre Julliard 2013-08-20 20:13:58 +02:00
parent d5b2c8e943
commit 2810c5647f
1 changed files with 8 additions and 3 deletions
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11
dlls/ntdll/threadpool.c
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@ -553,6 +553,7 @@ struct queue_timer
struct timer_queue
{
DWORD magic;
RTL_CRITICAL_SECTION cs;
struct list timers; /* sorted by expiration time */
BOOL quit; /* queue should be deleted; once set, never unset */
@ -561,6 +562,7 @@ struct timer_queue
};
#define EXPIRE_NEVER (~(ULONGLONG) 0)
#define TIMER_QUEUE_MAGIC 0x516d6954 /* TimQ */
static void queue_remove_timer(struct queue_timer *t)
{
@ -748,6 +750,7 @@ static void WINAPI timer_queue_thread_proc(LPVOID p)
NtClose(q->event);
RtlDeleteCriticalSection(&q->cs);
q->magic = 0;
RtlFreeHeap(GetProcessHeap(), 0, q);
}
@ -788,6 +791,7 @@ NTSTATUS WINAPI RtlCreateTimerQueue(PHANDLE NewTimerQueue)
RtlInitializeCriticalSection(&q->cs);
list_init(&q->timers);
q->quit = FALSE;
q->magic = TIMER_QUEUE_MAGIC;
status = NtCreateEvent(&q->event, EVENT_ALL_ACCESS, NULL, SynchronizationEvent, FALSE);
if (status != STATUS_SUCCESS)
{
@ -830,7 +834,7 @@ NTSTATUS WINAPI RtlDeleteTimerQueueEx(HANDLE TimerQueue, HANDLE CompletionEvent)
HANDLE thread;
NTSTATUS status;
if (!q)
if (!q || q->magic != TIMER_QUEUE_MAGIC)
return STATUS_INVALID_HANDLE;
thread = q->thread;
@ -925,8 +929,9 @@ NTSTATUS WINAPI RtlCreateTimer(PHANDLE NewTimer, HANDLE TimerQueue,
NTSTATUS status;
struct queue_timer *t;
struct timer_queue *q = get_timer_queue(TimerQueue);
if (!q)
return STATUS_NO_MEMORY;
if (!q) return STATUS_NO_MEMORY;
if (q->magic != TIMER_QUEUE_MAGIC) return STATUS_INVALID_HANDLE;
t = RtlAllocateHeap(GetProcessHeap(), 0, sizeof *t);
if (!t)