Mercurial > vim
view src/nbdebug.h @ 34627:5071d4c3ff2e v9.1.0202
patch 9.1.0202: leaking memory in add_user() on failure
Commit: https://github.com/vim/vim/commit/7a2f217988afa1c35b9c093a9d3477198ea250b9
Author: Christian Brabandt <cb@256bit.org>
Date: Sun Mar 24 09:50:03 2024 +0100
patch 9.1.0202: leaking memory in add_user() on failure
Problem: leaking memory in add_user() (LuMingYinDetect)
Solution: free user_copy pointer instead of the user ptr
add_user() is called with a user pointer and the user pointer comes
from these functions:
- return value from the getpwent() function (Unix).
- return value from the getpwnam() function (Unix).
- return value from the NetUserEnum() function (MS Windows).
For the first 2 callers, the man page for those functions directly says,
one should not free the returned pointer (since it comes from static
memory).
For the third caller (on MS Windows), the returned buffer is already
freed directly after calling the add_user() function in
NetApiBufferFree(), so this would lead to a double free().
This all indicates, the user ptr is wrongly freed in the add_user()
function and the intention was to free the user_copy pointer instead in
case of an error.
So let's just use that now.
fixes: #14250
closes: #14260
Signed-off-by: Christian Brabandt <cb@256bit.org>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Sun, 24 Mar 2024 10:00:09 +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