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Driver: Drop too long path.

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This commit is contained in:
Nodir Temirkhodjaev 2015-01-10 15:14:04 +05:00
parent 92762a5389
commit a4502f7589
2 changed files with 11 additions and 7 deletions
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14
src/drv/wipfbuf.c
View File

@ -1,6 +1,6 @@
/* Windows IP Filter Log Buffer */
#define WIPF_BUFFER_SIZE 4 * 1024
#define WIPF_BUFFER_SIZE 2 * 1024
#define WIPF_BUFFER_SIZE_MAX 32 * 1024
#include "../wipflog.c"
@ -36,12 +36,16 @@ wipf_buffer_write (PWIPF_BUFFER buf, UINT32 remote_ip, UINT64 pid,
UINT32 path_len, const PVOID path,
PIRP *irp, NTSTATUS *irp_status, ULONG_PTR *info)
{
const UINT32 len = sizeof(UINT32) + sizeof(UINT64)
+ sizeof(UINT32) + path_len;
UINT32 len = WIPF_LOG_SIZE(path_len);
UINT32 size;
KIRQL irq;
NTSTATUS status = STATUS_SUCCESS;
if (len > WIPF_BUFFER_SIZE) {
path_len = 0; /* drop too long path */
len = WIPF_LOG_SIZE(0);
}
KeAcquireSpinLock(&buf->lock, &irq);
/* Try to directly write to pending client */
@ -64,10 +68,6 @@ wipf_buffer_write (PWIPF_BUFFER buf, UINT32 remote_ip, UINT64 pid,
size = buf->size;
if (len > WIPF_BUFFER_SIZE) {
status = STATUS_INVALID_PARAMETER;
goto end; /* drop too long path */
}
if (len > size - buf->top) {
size *= 2;
}

4
src/wipflog.c
View File

@ -1,5 +1,9 @@
/* Windows IP Filter Log */
#define WIPF_LOG_SIZE(path_len) \
(sizeof(UINT32) + sizeof(UINT64) + sizeof(UINT32) + (path_len))
static void
wipf_log_write (char *p, UINT32 remote_ip, UINT64 pid,
UINT32 path_len, const char *path)