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patch 8.2.2463: using :arglocal in an autocommand may use freed memory

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Problem:    Using :arglocal in an autocommand may use freed memory.
            (houyunsong)
Solution:   Check if the arglist is locked.
This commit is contained in:
Bram Moolenaar
2021-02-03 21:23:29 +01:00
parent 2c363a2e95
commit 6bcb877ec1
3 changed files with 15 additions and 0 deletions
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4
src/arglist.c
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@@ -557,6 +557,8 @@ ex_args(exarg_T *eap)
if (eap->cmdidx != CMD_args)
{
if (check_arglist_locked() == FAIL)
return;
alist_unlink(ALIST(curwin));
if (eap->cmdidx == CMD_argglobal)
ALIST(curwin) = &global_alist;
@@ -566,6 +568,8 @@ ex_args(exarg_T *eap)
if (*eap->arg != NUL)
{
if (check_arglist_locked() == FAIL)
return;
// ":args file ..": define new argument list, handle like ":next"
// Also for ":argslocal file .." and ":argsglobal file ..".
ex_next(eap);