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Fix unpacking of bindists with hardinks pointing to themselves 

https://github.com/vmchale/libarchive/issues/14
https://github.com/libarchive/libarchive/issues/1381
This commit is contained in:
Julian Ospald 2020-07-20 19:28:56 +02:00
parent 3ecdb63063
commit 2c638cd2e2
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1 changed files with 12 additions and 0 deletions
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12
3rdparty/libarchive/c/archive_write_disk_posix.c vendored
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@ -546,6 +546,7 @@ _archive_write_disk_header(struct archive *_a, struct archive_entry *entry)
{
struct archive_write_disk *a = (struct archive_write_disk *)_a;
struct fixup_entry *fe;
const char *linkname;
int ret, r;
archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
@ -590,6 +591,17 @@ _archive_write_disk_header(struct archive *_a, struct archive_entry *entry)
if (ret != ARCHIVE_OK)
return (ret);
/*
* Check if we have a hardlink that points to itself.
*/
linkname = archive_entry_hardlink(a->entry);
if (linkname != NULL && strcmp(a->name, linkname) == 0) {
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
"Skipping hardlink pointing to itself: %s",
a->name);
return (ARCHIVE_WARN);
}
/*
* Query the umask so we get predictable mode settings.
* This gets done on every call to _write_header in case the