patch 9.0.2123: Problem with initializing the length of range() lists Commit: https://github.com/vim/vim/commit/df63da98d8dc284b1c76cfe1b17fa0acbd6094d8 Author: Christian Brabandt <cb@256bit.org> Date: Thu Nov 23 20:14:28 2023 +0100 patch 9.0.2123: Problem with initializing the length of range() lists Problem: Problem with initializing the length of range() lists Solution: Set length explicitly when it shouldn't contain any items range() may cause a wrong calculation of list length, which may later then cause a segfault in list_find(). This is usually not a problem, because range_list_materialize() calculates the length, when it materializes the list. In addition, in list_find() when the length of the range was wrongly initialized, it may seem to be valid, so the check for list index out-of-bounds will not be true, because it is called before the list is actually materialized. And so we may eventually try to access a null pointer, causing a segfault. So this patch does 3 things: - In f_range(), when we know that the list should be empty, explicitly set the list->lv_len value to zero. This should happen, when start is larger than end (in case the stride is positive) or end is larger than start when the stride is negative. This should fix the underlying issue properly. However, - as a safety measure, let's check that the requested index is not out of range one more time, after the list has been materialized and return NULL in case it suddenly is. - add a few more tests to verify the behaviour. fixes: #13557 closes: #13563 Co-authored-by: Tim Pope <tpope@github.com> Signed-off-by: Christian Brabandt <cb@256bit.org>

// this file contains the actual definitions of
// the IIDs and CLSIDs

// link this file in with the server and any clients


// File created by MIDL compiler version 3.00.44
// at Sat Jan 03 16:34:55 1998
// Compiler settings for if_ole.idl:
// Os (OptLev=s), W1, Zp8, env=Win32, ms_ext, c_ext
// error checks: none
//@@MIDL_FILE_HEADING(  )
#ifdef __cplusplus
extern "C"{
#endif

#ifdef __MINGW32__
# include <w32api.h>

# if __W32API_MAJOR_VERSION == 3 && __W32API_MINOR_VERSION < 10
   // This define is missing from older MingW versions of w32api, even though
   // IID is defined.
#  define __IID_DEFINED__
# endif
#endif

#ifndef __IID_DEFINED__
# define __IID_DEFINED__

typedef struct _IID
{
    unsigned long x;
    unsigned short s1;
    unsigned short s2;
    unsigned char  c[8];
} IID;

#endif

#ifndef CLSID_DEFINED
# define CLSID_DEFINED
typedef IID CLSID;
#endif

const IID IID_IVim = {0x0F0BFAE2,0x4C90,0x11d1,{0x82,0xD7,0x00,0x04,0xAC,0x36,0x85,0x19}};


const IID LIBID_Vim = {0x0F0BFAE0,0x4C90,0x11d1,{0x82,0xD7,0x00,0x04,0xAC,0x36,0x85,0x19}};


const CLSID CLSID_Vim = {0x0F0BFAE1,0x4C90,0x11d1,{0x82,0xD7,0x00,0x04,0xAC,0x36,0x85,0x19}};


#ifdef __cplusplus
}
#endif