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-rw-r--r--libarchive/archive_read_support_format_cpio.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/libarchive/archive_read_support_format_cpio.c b/libarchive/archive_read_support_format_cpio.c
index c2ca85bd3ad9..b09db0e9a59b 100644
--- a/libarchive/archive_read_support_format_cpio.c
+++ b/libarchive/archive_read_support_format_cpio.c
@@ -401,6 +401,11 @@ archive_read_format_cpio_read_header(struct archive_read *a,
/* If this is a symlink, read the link contents. */
if (archive_entry_filetype(entry) == AE_IFLNK) {
+ if (cpio->entry_bytes_remaining > 1024 * 1024) {
+ archive_set_error(&a->archive, ENOMEM,
+ "Rejecting malformed cpio archive: symlink contents exceed 1 megabyte");
+ return (ARCHIVE_FATAL);
+ }
h = __archive_read_ahead(a,
(size_t)cpio->entry_bytes_remaining, NULL);
if (h == NULL)