Mercurial > vim
view src/os_qnx.c @ 33879:d418c82f02a4 v9.0.2149
patch 9.0.2149: [security]: use-after-free in exec_instructions()
Commit: https://github.com/vim/vim/commit/5dd41d4b6370b7b7d09d691f9252b3899c66102a
Author: Christian Brabandt <cb@256bit.org>
Date: Mon Dec 4 22:52:23 2023 +0100
patch 9.0.2149: [security]: use-after-free in exec_instructions()
Problem: [security]: use-after-free in exec_instructions()
Solution: get tv pointer again
[security]: use-after-free in exec_instructions()
exec_instructions may access freed memory, if the GA_GROWS_FAILS()
re-allocates memory. When this happens, the typval tv may still point to
now already freed memory. So let's get that pointer again and compare it
with tv. If those two pointers differ, tv is now invalid and we have to
refresh the tv pointer.
closes: #13621
Signed-off-by: Christian Brabandt <cb@256bit.org>
author | Christian Brabandt <cb@256bit.org> |
---|---|
date | Sun, 10 Dec 2023 15:16:17 +0100 |
parents | 97255d909654 |
children |
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/* vi:set ts=8 sts=4 sw=4 noet: * * VIM - Vi IMproved by Bram Moolenaar * * QNX port by Julian Kinraid * * Do ":help uganda" in Vim to read copying and usage conditions. * Do ":help credits" in Vim to see a list of people who contributed. */ /* * os_qnx.c */ #include "vim.h" #if defined(FEAT_GUI_PHOTON) int is_photon_available; #endif void qnx_init(void) { #if defined(FEAT_GUI_PHOTON) PhChannelParms_t parms; CLEAR_FIELD(parms); parms.flags = Ph_DYNAMIC_BUFFER; is_photon_available = (PhAttach(NULL, &parms) != NULL) ? TRUE : FALSE; #endif } #if (defined(FEAT_GUI_PHOTON) && defined(FEAT_CLIPBOARD)) || defined(PROTO) #define CLIP_TYPE_VIM "VIMTYPE" #define CLIP_TYPE_TEXT "TEXT" // Turn on the clipboard for a console vim when photon is running void qnx_clip_init(void) { if (is_photon_available == TRUE && !gui.in_use) clip_init(TRUE); } ///////////////////////////////////////////////////////////////////////////// // Clipboard // No support for owning the clipboard int clip_mch_own_selection(Clipboard_T *cbd) { return FALSE; } void clip_mch_lose_selection(Clipboard_T *cbd) { } void clip_mch_request_selection(Clipboard_T *cbd) { int type = MLINE, clip_length = 0, is_type_set = FALSE; void *cbdata; PhClipHeader *clip_header; char_u *clip_text = NULL; cbdata = PhClipboardPasteStart(PhInputGroup(NULL)); if (cbdata == NULL) return; // Look for the vim specific clip first clip_header = PhClipboardPasteType(cbdata, CLIP_TYPE_VIM); if (clip_header != NULL && clip_header->data != NULL) { switch(*(char *) clip_header->data) { default: // fallthrough to line type case 'L': type = MLINE; break; case 'C': type = MCHAR; break; case 'B': type = MBLOCK; break; } is_type_set = TRUE; } // Try for just normal text clip_header = PhClipboardPasteType(cbdata, CLIP_TYPE_TEXT); if (clip_header != NULL) { clip_text = clip_header->data; clip_length = clip_header->length - 1; if (clip_text != NULL && is_type_set == FALSE) type = MAUTO; } if ((clip_text != NULL) && (clip_length > 0)) clip_yank_selection(type, clip_text, clip_length, cbd); PhClipboardPasteFinish(cbdata); } void clip_mch_set_selection(Clipboard_T *cbd) { int type; long_u len; char_u *text_clip, vim_clip[2], *str = NULL; PhClipHeader clip_header[2]; // Prevent recursion from clip_get_selection() if (cbd->owned == TRUE) return; cbd->owned = TRUE; clip_get_selection(cbd); cbd->owned = FALSE; type = clip_convert_selection(&str, &len, cbd); if (type >= 0) { text_clip = alloc(len + 1); // Normal text if (text_clip && vim_clip) { CLEAR_FIELD(clip_header); STRNCPY(clip_header[0].type, CLIP_TYPE_VIM, 8); clip_header[0].length = sizeof(vim_clip); clip_header[0].data = vim_clip; STRNCPY(clip_header[1].type, CLIP_TYPE_TEXT, 8); clip_header[1].length = len + 1; clip_header[1].data = text_clip; switch(type) { default: // fallthrough to MLINE case MLINE: *vim_clip = 'L'; break; case MCHAR: *vim_clip = 'C'; break; case MBLOCK: *vim_clip = 'B'; break; } vim_strncpy(text_clip, str, len); vim_clip[ 1 ] = NUL; PhClipboardCopy(PhInputGroup(NULL), 2, clip_header); } vim_free(text_clip); } vim_free(str); } #endif