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vim-patch:8.0.0378

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Problem:    Another possible overflow when reading corrupted undo file.
Solution:   Check if allocated size is not too big. (King)

0c8485f0e4

CVE-2017-6350
This commit is contained in:
James McCoy 2017-04-08 21:56:02 -04:00
parent fb66a7c69e
commit ad66826abe
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GPG Key ID: DFE691AE331BA3DB
1 changed files with 5 additions and 5 deletions
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10
src/nvim/undo.c
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@ -967,12 +967,12 @@ static u_entry_T *unserialize_uep(bufinfo_T * bi, bool *error,
uep->ue_lcount = undo_read_4c(bi);
uep->ue_size = undo_read_4c(bi);
char_u **array;
char_u **array = NULL;
if (uep->ue_size > 0) {
array = xmalloc(sizeof(char_u *) * (size_t)uep->ue_size);
memset(array, 0, sizeof(char_u *) * (size_t)uep->ue_size);
} else {
array = NULL;
if ((size_t)uep->ue_size < SIZE_MAX / sizeof(char_u *)) {
array = xmalloc(sizeof(char_u *) * (size_t)uep->ue_size);
memset(array, 0, sizeof(char_u *) * (size_t)uep->ue_size);
}
}
uep->ue_array = array;