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vim-patch:8.2.5063: error for a command may go over the end of IObuff (#19260)

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Problem:    Error for a command may go over the end of IObuff.
Solution:   Truncate the message.
44a3f3353e
This commit is contained in:
zeertzjq 2022-07-07 06:37:54 +08:00 committed by GitHub
parent 664efa497e
commit 4ffe5d0189
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 12 additions and 0 deletions
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7
src/nvim/ex_docmd.c
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@ -2904,9 +2904,16 @@ int checkforcmd(char **pp, char *cmd, int len)
/// invisible otherwise. /// invisible otherwise.
static void append_command(char *cmd) static void append_command(char *cmd)
{ {
size_t len = STRLEN(IObuff);
char *s = cmd; char *s = cmd;
char *d; char *d;
if (len > IOSIZE - 100) {
// Not enough space, truncate and put in "...".
d = (char *)IObuff + IOSIZE - 100;
d -= utf_head_off(IObuff, (const char_u *)d);
STRCPY(d, "...");
}
STRCAT(IObuff, ": "); STRCAT(IObuff, ": ");
d = (char *)IObuff + STRLEN(IObuff); d = (char *)IObuff + STRLEN(IObuff);
while (*s != NUL && (char_u *)d - IObuff + 5 < IOSIZE) { while (*s != NUL && (char_u *)d - IObuff + 5 < IOSIZE) {

5
src/nvim/testdir/test_cmdline.vim
View File

@ -1361,4 +1361,9 @@ func Test_recursive_register()
call assert_equal('yes', caught) call assert_equal('yes', caught)
endfunc endfunc
func Test_long_error_message()
" the error should be truncated, not overrun IObuff
silent! norm Q00000000000000     000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000                                                                                                                                                                                                                        
endfunc
" vim: shiftwidth=2 sts=2 expandtab " vim: shiftwidth=2 sts=2 expandtab