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unlzma: add comments about possible bug from BZ 2689

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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2014-02-28 15:42:10 +01:00
parent 2108a6f0b5
commit 81071e6872
1 changed files with 6 additions and 0 deletions
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6
archival/libarchive/decompress_unlzma.c
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@ -237,6 +237,9 @@ unpack_lzma_stream(transformer_aux_data_t *aux UNUSED_PARAM, int src_fd, int dst
pos_state_mask = (1 << pb) - 1;
literal_pos_mask = (1 << lp) - 1;
/* Example values from linux-3.3.4.tar.lzma:
* dict_size: 64M, dst_size: 2^64-1
*/
header.dict_size = SWAP_LE32(header.dict_size);
header.dst_size = SWAP_LE64(header.dst_size);
@ -443,6 +446,9 @@ unpack_lzma_stream(transformer_aux_data_t *aux UNUSED_PARAM, int src_fd, int dst
}
len--;
} while (len != 0 && buffer_pos < header.dst_size);
/* FIXME: ...........^^^^^
* shouldn't it be "global_pos + buffer_pos < header.dst_size"?
*/
}
}