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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2015-05-11 16:55:16 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2015-05-11 16:55:16 +0200 |
| commit | bdb540e04f3eb52c4cd790c45c5d8efd6d749c70 (patch) | |
| tree | aff390bd9d45788afe923101adbea75e9b1f2419 | |
| parent | 778efe37eed03de6e194a746925f1160181ff587 (diff) | |
| download | busybox-bdb540e04f3eb52c4cd790c45c5d8efd6d749c70.tar.gz | |
tar: do not try to decode GNU extended headers as pax headers
function old new delta
get_header_tar 1736 1692 -44
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | archival/libarchive/get_header_tar.c | 28 |
1 files changed, 17 insertions, 11 deletions
diff --git a/archival/libarchive/get_header_tar.c b/archival/libarchive/get_header_tar.c index 2dbcdb50c..fb68673b9 100644 --- a/archival/libarchive/get_header_tar.c +++ b/archival/libarchive/get_header_tar.c @@ -350,7 +350,14 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) case '6': file_header->mode |= S_IFIFO; goto size0; + case 'g': /* pax global header */ + case 'x': { /* pax extended header */ + if ((uoff_t)file_header->size > 0xfffff) /* paranoia */ + goto skip_ext_hdr; + process_pax_hdr(archive_handle, file_header->size, (tar.typeflag == 'g')); + goto again_after_align; #if ENABLE_FEATURE_TAR_GNU_EXTENSIONS +/* See http://www.gnu.org/software/tar/manual/html_node/Extensions.html */ case 'L': /* free: paranoia: tar with several consecutive longnames */ free(p_longname); @@ -370,18 +377,17 @@ char FAST_FUNC get_header_tar(archive_handle_t *archive_handle) archive_handle->offset += file_header->size; /* return get_header_tar(archive_handle); */ goto again; - case 'D': /* GNU dump dir */ - case 'M': /* Continuation of multi volume archive */ - case 'N': /* Old GNU for names > 100 characters */ - case 'S': /* Sparse file */ - case 'V': /* Volume header */ +/* + * case 'S': // Sparse file + * Was seen in the wild. Not supported (yet?). + * See https://www.gnu.org/software/tar/manual/html_section/tar_92.html + * for the format. (An "Old GNU Format" was seen, not PAX formats). + */ +// case 'D': /* GNU dump dir */ +// case 'M': /* Continuation of multi volume archive */ +// case 'N': /* Old GNU for names > 100 characters */ +// case 'V': /* Volume header */ #endif - case 'g': /* pax global header */ - case 'x': { /* pax extended header */ - if ((uoff_t)file_header->size > 0xfffff) /* paranoia */ - goto skip_ext_hdr; - process_pax_hdr(archive_handle, file_header->size, (tar.typeflag == 'g')); - goto again_after_align; } skip_ext_hdr: { |