view src/nbdebug.h @ 33862:242b964d6269 v9.0.2140

patch 9.0.2140: [security]: use-after-free in win-enter Commit: https://github.com/vim/vim/commit/eec0c2b3a4cfab93dd8d4adaa60638d47a2bbc8a Author: Christian Brabandt <cb@256bit.org> Date: Tue Nov 28 22:03:48 2023 +0100 patch 9.0.2140: [security]: use-after-free in win-enter Problem: [security]: use-after-free in win-enter Solution: validate window pointer before calling win_enter() win_goto() may stop visual mode, if it is active. However, this may in turn trigger the ModeChanged autocommand, which could potentially free the wp pointer which was valid before now became stale and points to now freed memory. So before calling win_enter(), let's verify one more time, that the wp pointer still points to a valid window structure. Reported by @henices, thanks! Signed-off-by: Christian Brabandt <cb@256bit.org>
author Christian Brabandt <cb@256bit.org>
date Sun, 10 Dec 2023 15:16:01 +0100
parents 50555279168b
children
line wrap: on
line source

/* vi:set ts=8 sw=8 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *			Visual Workshop integration by Gordon Prieur
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 */


#ifndef NBDEBUG_H
#define NBDEBUG_H

#ifdef NBDEBUG

# ifndef ASSERT
#  define ASSERT(c) \
    if (!(c)) \
    { \
	fprintf(stderr, "Assertion failed: line %d, file %s\n", \
		__LINE__, __FILE__); \
	fflush(stderr); \
	abort(); \
    }
# endif

# define nbdebug(a) nbdbg a

# define NB_TRACE		0x00000001
# define NB_TRACE_VERBOSE	0x00000002
# define NB_TRACE_COLONCMD	0x00000004
# define NB_PRINT		0x00000008
# define NB_DEBUG_ALL		0xffffffff

# define NBDLEVEL(flags)	(nb_debug != NULL && (nb_dlevel & (flags)))

# define NBDEBUG_TRACE	1

typedef enum {
		WT_ENV = 1,		// look for env var if set
		WT_WAIT,		// look for ~/.gvimwait if set
		WT_STOP			// look for ~/.gvimstop if set
} WtWait;


void		 nbdbg(char *, ...) ATTRIBUTE_FORMAT_PRINTF(1, 2);

void nbdebug_wait(u_int wait_flags, char *wait_var, u_int wait_secs);
void nbdebug_log_init(char *log_var, char *level_var);

extern FILE	*nb_debug;
extern u_int	 nb_dlevel;		// nb_debug verbosity level

#else		// not NBDEBUG

# ifndef ASSERT
#  define ASSERT(c)
# endif

/*
 * The following 3 stubs are needed because a macro cannot be used because of
 * the variable number of arguments.
 */

void
nbdbg(
	char		*fmt,
	...)
{
}

#endif // NBDEBUG
#endif // NBDEBUG_H