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patch 8.2.5079: DirChanged autocommand may use freed memory

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Problem:    DirChanged autocommand may use freed memory. (Shane-XB Qian)
Solution:   Free the memory later. (closes #10555)
This commit is contained in:
Bram Moolenaar
2022-06-12 11:49:16 +01:00
parent 3269efdf01
commit d8c9d32c89
3 changed files with 12 additions and 1 deletions
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4
src/ex_docmd.c
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@@ -7525,6 +7525,7 @@ changedir_func(
int dir_differs;
char_u *acmd_fname = NULL;
char_u **pp;
char_u *tofree;
if (new_dir == NULL || allbuf_locked())
return FALSE;
@@ -7601,13 +7602,14 @@ changedir_func(
pp = &curtab->tp_prevdir;
else
pp = &prev_dir;
vim_free(*pp);
tofree = *pp; // new_dir may use this
*pp = pdir;
post_chdir(scope);
if (dir_differs)
apply_autocmds(EVENT_DIRCHANGED, acmd_fname, new_dir, FALSE, curbuf);
vim_free(tofree);
return TRUE;
}