Mercurial > vim
view src/proto/evalfunc.pro @ 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 | 16025ef158bf |
children |
line wrap: on
line source
/* evalfunc.c */ int arg_type_modifiable(type_T *type, int arg_idx); char_u *get_function_name(expand_T *xp, int idx); char_u *get_expr_name(expand_T *xp, int idx); int find_internal_func(char_u *name); int has_internal_func(char_u *name); char *internal_func_name(int idx); int internal_func_check_arg_types(type2_T *types, int idx, int argcount, cctx_T *cctx); void internal_func_get_argcount(int idx, int *argcount, int *min_argcount); type_T *internal_func_ret_type(int idx, int argcount, type2_T *argtypes, type_T **decl_type, garray_T *type_gap); int internal_func_is_map(int idx); int check_internal_func(int idx, int argcount); funcerror_T call_internal_func(char_u *name, int argcount, typval_T *argvars, typval_T *rettv); void call_internal_func_by_idx(int idx, typval_T *argvars, typval_T *rettv); funcerror_T call_internal_method(char_u *name, int argcount, typval_T *argvars, typval_T *rettv, typval_T *basetv); int non_zero_arg(typval_T *argvars); buf_T *get_buf_arg(typval_T *arg); win_T *get_optional_window(typval_T *argvars, int idx); void execute_redir_str(char_u *value, int value_len); void execute_cmds_from_string(char_u *str); char_u *get_list_line(int c, void *cookie, int indent, getline_opt_T options); void execute_common(typval_T *argvars, typval_T *rettv, int arg_off); void f_exists(typval_T *argvars, typval_T *rettv); void f_has(typval_T *argvars, typval_T *rettv); int dynamic_feature(char_u *feature); void f_len(typval_T *argvars, typval_T *rettv); void mzscheme_call_vim(char_u *name, typval_T *args, typval_T *rettv); void range_list_materialize(list_T *list); long do_searchpair(char_u *spat, char_u *mpat, char_u *epat, int dir, typval_T *skip, int flags, pos_T *match_pos, linenr_T lnum_stop, long time_limit); /* vim: set ft=c : */