KERNEL: check for NULL in LoadModule16

Alex Villací­s Lasso a_villacis at
Thu Sep 1 11:15:37 CDT 2005

Andreas Mohr wrote:

>On Mon, Aug 29, 2005 at 01:43:04PM -0500, Alex Villací­s Lasso wrote:
>>I could not find any MSDN reference on any documented behavior for 
>>LoadLibrary16 or LoadModule16 when libname == NULL.
>I've checked it now (Watcom, Win98 SE):
>(forgot to zero LOADPARAMS, sorry! But it hopefully didn't matter...)
>a) NULL, &lp		0 "system out of mem/executable corrupt/relocs invalid"
>b) "kernel", NULL	kernel handle
>c) NULL, NULL		0
>d) (char *)0x1, &lp	2 "file not found"
>e) (char *)0x1256, NULL	2
>f) NULL, (void *)0x1257	0
>NO CRASHES whatsoever, IOW it fully intercepts any invalid pointers.
>a), c), f) vs. d) indicates that it does an explicit check against a NULL name,
>since probably otherwise LoadModule16 will continue due to the non-NULL
>name (0x1) and notice somewhat later (in some file API) that file name 0x1
>is invalid.
The attached patch should implement the observed behavior in Win98SE.

Alex Villacís Lasso

- Add NULL and exception handler to LoadModule16 to check against NULL 
or invalid libname

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