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vim-patch:8.1.2197: ExitPre autocommand may cause accessing freed memory

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Problem:    ExitPre autocommand may cause accessing freed memory.
Solution:   Check the window pointer is still valid. (closes vim/vim#5093)
34ba06b6e6
This commit is contained in:
Jan Edmund Lazo
2019-10-20 20:12:08 -04:00
parent 13a6878d18
commit c067efa696
2 changed files with 27 additions and 3 deletions
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8
src/nvim/ex_docmd.c
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@@ -6070,9 +6070,11 @@ static bool before_quit_autocmds(win_T *wp, bool quit_all, int forceit)
if (quit_all
|| (check_more(false, forceit) == OK && only_one_window())) {
apply_autocmds(EVENT_EXITPRE, NULL, NULL, false, curbuf);
// Refuse to quit when locked or when the buffer in the last window is
// being closed (can only happen in autocommands).
if (curbuf_locked()
// Refuse to quit when locked or when the window was closed or the
// buffer in the last window is being closed (can only happen in
// autocommands).
if (!win_valid(wp)
|| curbuf_locked()
|| (curbuf->b_nwindows == 1 && curbuf->b_locked > 0)) {
return true;
}