diff options
Diffstat (limited to 'sys-apps/busybox/files/busybox-1.21.0-xz.patch')
| -rw-r--r-- | sys-apps/busybox/files/busybox-1.21.0-xz.patch | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/sys-apps/busybox/files/busybox-1.21.0-xz.patch b/sys-apps/busybox/files/busybox-1.21.0-xz.patch new file mode 100644 index 000000000000..56ba1a2731e6 --- /dev/null +++ b/sys-apps/busybox/files/busybox-1.21.0-xz.patch @@ -0,0 +1,84 @@ +--- busybox-1.21.0/archival/libarchive/decompress_unxz.c ++++ busybox-1.21.0-xz/archival/libarchive/decompress_unxz.c +@@ -40,6 +40,7 @@ static uint32_t xz_crc32(const uint8_t * + IF_DESKTOP(long long) int FAST_FUNC + unpack_xz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd) + { ++ enum xz_ret xz_result; + struct xz_buf iobuf; + struct xz_dec *state; + unsigned char *membuf; +@@ -63,9 +64,8 @@ unpack_xz_stream(transformer_aux_data_t + /* Limit memory usage to about 64 MiB. */ + state = xz_dec_init(XZ_DYNALLOC, 64*1024*1024); + ++ xz_result = X_OK; + while (1) { +- enum xz_ret r; +- + if (iobuf.in_pos == iobuf.in_size) { + int rd = safe_read(src_fd, membuf, BUFSIZ); + if (rd < 0) { +@@ -73,28 +73,57 @@ unpack_xz_stream(transformer_aux_data_t + total = -1; + break; + } ++ if (rd == 0 && xz_result == XZ_STREAM_END) ++ break; + iobuf.in_size = rd; + iobuf.in_pos = 0; + } ++ if (xz_result == XZ_STREAM_END) { ++ /* ++ * Try to start decoding next concatenated stream. ++ * Stream padding must always be a multiple of four ++ * bytes to preserve four-byte alignment. To keep the ++ * code slightly smaller, we aren't as strict here as ++ * the .xz spec requires. We just skip all zero-bytes ++ * without checking the alignment and thus can accept ++ * files that aren't valid, e.g. the XZ utils test ++ * files bad-0pad-empty.xz and bad-0catpad-empty.xz. ++ */ ++ do { ++ if (membuf[iobuf.in_pos] != 0) { ++ xz_dec_reset(state); ++ goto do_run; ++ } ++ iobuf.in_pos++; ++ } while (iobuf.in_pos < iobuf.in_size); ++ } ++ do_run: + // bb_error_msg(">in pos:%d size:%d out pos:%d size:%d", + // iobuf.in_pos, iobuf.in_size, iobuf.out_pos, iobuf.out_size); +- r = xz_dec_run(state, &iobuf); ++ xz_result = xz_dec_run(state, &iobuf); + // bb_error_msg("<in pos:%d size:%d out pos:%d size:%d r:%d", +-// iobuf.in_pos, iobuf.in_size, iobuf.out_pos, iobuf.out_size, r); ++// iobuf.in_pos, iobuf.in_size, iobuf.out_pos, iobuf.out_size, xz_result); + if (iobuf.out_pos) { + xwrite(dst_fd, iobuf.out, iobuf.out_pos); + IF_DESKTOP(total += iobuf.out_pos;) + iobuf.out_pos = 0; + } +- if (r == XZ_STREAM_END) { +- break; ++ if (xz_result == XZ_STREAM_END) { ++ /* ++ * Can just "break;" here, if not for concatenated ++ * .xz streams. ++ * Checking for padding may require buffer ++ * replenishment. Can't do it here. ++ */ ++ continue; + } +- if (r != XZ_OK && r != XZ_UNSUPPORTED_CHECK) { ++ if (xz_result != XZ_OK && xz_result != XZ_UNSUPPORTED_CHECK) { + bb_error_msg("corrupted data"); + total = -1; + break; + } + } ++ + xz_dec_end(state); + free(membuf); + |