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Merge branch 'tb/attr-limits'

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The maximum size of attribute files is enforced more consistently.

* tb/attr-limits:
  attr.c: move ATTR_MAX_FILE_SIZE check into read_attr_from_buf()
This commit is contained in:
Junio C Hamano 2024-05-13 10:19:46 -07:00
parent 328f164496 c793f9cb08
commit 71bd0c8a61
2 changed files with 19 additions and 10 deletions
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19
attr.c
View file

@ -765,8 +765,8 @@ static struct attr_stack *read_attr_from_file(const char *path, unsigned flags)
return res;
}
static struct attr_stack *read_attr_from_buf(char *buf, const char *path,
unsigned flags)
static struct attr_stack *read_attr_from_buf(char *buf, size_t length,
const char *path, unsigned flags)
{
struct attr_stack *res;
char *sp;
@ -774,6 +774,11 @@ static struct attr_stack *read_attr_from_buf(char *buf, const char *path,
if (!buf)
return NULL;
if (length >= ATTR_MAX_FILE_SIZE) {
warning(_("ignoring overly large gitattributes blob '%s'"), path);
free(buf);
return NULL;
}
CALLOC_ARRAY(res, 1);
for (sp = buf; *sp;) {
@ -813,7 +818,7 @@ static struct attr_stack *read_attr_from_blob(struct index_state *istate,
return NULL;
}
return read_attr_from_buf(buf, path, flags);
return read_attr_from_buf(buf, sz, path, flags);
}
static struct attr_stack *read_attr_from_index(struct index_state *istate,
@ -860,13 +865,7 @@ static struct attr_stack *read_attr_from_index(struct index_state *istate,
stack = read_attr_from_blob(istate, &istate->cache[sparse_dir_pos]->oid, relative_path, flags);
} else {
buf = read_blob_data_from_index(istate, path, &size);
if (!buf)
return NULL;
if (size >= ATTR_MAX_FILE_SIZE) {
warning(_("ignoring overly large gitattributes blob '%s'"), path);
return NULL;
}
stack = read_attr_from_buf(buf, path, flags);
stack = read_attr_from_buf(buf, size, path, flags);
}
return stack;
}

10
t/t0003-attributes.sh
View file

@ -572,6 +572,16 @@ test_expect_success EXPENSIVE 'large attributes file ignored in index' '
test_cmp expect err
'
test_expect_success EXPENSIVE 'large attributes blob ignored' '
test_when_finished "git update-index --remove .gitattributes" &&
blob=$(dd if=/dev/zero bs=1048576 count=101 2>/dev/null | git hash-object -w --stdin) &&
git update-index --add --cacheinfo 100644,$blob,.gitattributes &&
tree="$(git write-tree)" &&
git check-attr --cached --all --source="$tree" path >/dev/null 2>err &&
echo "warning: ignoring overly large gitattributes blob ${SQ}.gitattributes${SQ}" >expect &&
test_cmp expect err
'
test_expect_success 'builtin object mode attributes work (dir and regular paths)' '
>normal &&
attr_check_object_mode normal 100644 &&