From 21c6b94373d239d7e86bd480fcd558e30391712f Mon Sep 17 00:00:00 2001 From: Lasse Collin Date: Tue, 28 Apr 2009 23:08:32 +0300 Subject: Fixed a crash in liblzma. liblzma tries to avoid useless free()/malloc() pairs in initialization when multiple files are handled using the same lzma_stream. This didn't work with filter chains due to comparison of wrong pointers in lzma_next_coder_init(), making liblzma think that no memory reallocation is needed even when it actually is. Easy way to trigger this bug is to decompress two files with a single xz command. The first file should have e.g. x86+LZMA2 as the filter chain, and the second file just LZMA2. --- src/liblzma/common/alone_decoder.c | 2 +- src/liblzma/common/alone_encoder.c | 4 ++-- src/liblzma/common/auto_decoder.c | 2 +- src/liblzma/common/block_decoder.c | 2 +- src/liblzma/common/block_encoder.c | 2 +- src/liblzma/common/common.h | 4 ++-- src/liblzma/common/easy_encoder.c | 2 +- src/liblzma/common/index_decoder.c | 2 +- src/liblzma/common/index_encoder.c | 2 +- src/liblzma/common/stream_decoder.c | 2 +- src/liblzma/common/stream_encoder.c | 2 +- 11 files changed, 13 insertions(+), 13 deletions(-) diff --git a/src/liblzma/common/alone_decoder.c b/src/liblzma/common/alone_decoder.c index ffbc8b45..fa7fb839 100644 --- a/src/liblzma/common/alone_decoder.c +++ b/src/liblzma/common/alone_decoder.c @@ -188,7 +188,7 @@ extern lzma_ret lzma_alone_decoder_init(lzma_next_coder *next, lzma_allocator *allocator, uint64_t memlimit) { - lzma_next_coder_init(lzma_alone_decoder_init, next, allocator); + lzma_next_coder_init(&lzma_alone_decoder_init, next, allocator); if (memlimit == 0) return LZMA_PROG_ERROR; diff --git a/src/liblzma/common/alone_encoder.c b/src/liblzma/common/alone_encoder.c index d501c7a2..68c9505d 100644 --- a/src/liblzma/common/alone_encoder.c +++ b/src/liblzma/common/alone_encoder.c @@ -78,7 +78,7 @@ static lzma_ret alone_encoder_init(lzma_next_coder *next, lzma_allocator *allocator, const lzma_options_lzma *options) { - lzma_next_coder_init(alone_encoder_init, next, allocator); + lzma_next_coder_init(&alone_encoder_init, next, allocator); if (next->coder == NULL) { next->coder = lzma_alloc(sizeof(lzma_coder), allocator); @@ -140,7 +140,7 @@ extern lzma_ret lzma_alone_encoder_init(lzma_next_coder *next, lzma_allocator *allocator, const lzma_options_alone *options) { - lzma_next_coder_init(alone_encoder_init, next, allocator, options); + lzma_next_coder_init(&alone_encoder_init, next, allocator, options); } */ diff --git a/src/liblzma/common/auto_decoder.c b/src/liblzma/common/auto_decoder.c index 4420495a..ae6c3e78 100644 --- a/src/liblzma/common/auto_decoder.c +++ b/src/liblzma/common/auto_decoder.c @@ -146,7 +146,7 @@ static lzma_ret auto_decoder_init(lzma_next_coder *next, lzma_allocator *allocator, uint64_t memlimit, uint32_t flags) { - lzma_next_coder_init(auto_decoder_init, next, allocator); + lzma_next_coder_init(&auto_decoder_init, next, allocator); if (memlimit == 0) return LZMA_PROG_ERROR; diff --git a/src/liblzma/common/block_decoder.c b/src/liblzma/common/block_decoder.c index 8c174a80..9b998e63 100644 --- a/src/liblzma/common/block_decoder.c +++ b/src/liblzma/common/block_decoder.c @@ -186,7 +186,7 @@ extern lzma_ret lzma_block_decoder_init(lzma_next_coder *next, lzma_allocator *allocator, lzma_block *block) { - lzma_next_coder_init(lzma_block_decoder_init, next, allocator); + lzma_next_coder_init(&lzma_block_decoder_init, next, allocator); // Validate the options. lzma_block_unpadded_size() does that for us // except for Uncompressed Size and filters. Filters are validated diff --git a/src/liblzma/common/block_encoder.c b/src/liblzma/common/block_encoder.c index 2da7cb54..0d7b3ef2 100644 --- a/src/liblzma/common/block_encoder.c +++ b/src/liblzma/common/block_encoder.c @@ -149,7 +149,7 @@ extern lzma_ret lzma_block_encoder_init(lzma_next_coder *next, lzma_allocator *allocator, lzma_block *block) { - lzma_next_coder_init(lzma_block_encoder_init, next, allocator); + lzma_next_coder_init(&lzma_block_encoder_init, next, allocator); if (block->version != 0) return LZMA_OPTIONS_ERROR; diff --git a/src/liblzma/common/common.h b/src/liblzma/common/common.h index ca75d506..de252604 100644 --- a/src/liblzma/common/common.h +++ b/src/liblzma/common/common.h @@ -240,9 +240,9 @@ do { \ /// next->init to func is still OK. #define lzma_next_coder_init(func, next, allocator) \ do { \ - if ((uintptr_t)(&func) != (next)->init) \ + if ((uintptr_t)(func) != (next)->init) \ lzma_next_end(next, allocator); \ - (next)->init = (uintptr_t)(&func); \ + (next)->init = (uintptr_t)(func); \ } while (0) diff --git a/src/liblzma/common/easy_encoder.c b/src/liblzma/common/easy_encoder.c index cbabdb85..5e2641c9 100644 --- a/src/liblzma/common/easy_encoder.c +++ b/src/liblzma/common/easy_encoder.c @@ -45,7 +45,7 @@ static lzma_ret easy_encoder_init(lzma_next_coder *next, lzma_allocator *allocator, uint32_t preset, lzma_check check) { - lzma_next_coder_init(easy_encoder_init, next, allocator); + lzma_next_coder_init(&easy_encoder_init, next, allocator); if (next->coder == NULL) { next->coder = lzma_alloc(sizeof(lzma_coder), allocator); diff --git a/src/liblzma/common/index_decoder.c b/src/liblzma/common/index_decoder.c index 4145a450..51e9de38 100644 --- a/src/liblzma/common/index_decoder.c +++ b/src/liblzma/common/index_decoder.c @@ -243,7 +243,7 @@ static lzma_ret index_decoder_init(lzma_next_coder *next, lzma_allocator *allocator, lzma_index **i, uint64_t memlimit) { - lzma_next_coder_init(index_decoder_init, next, allocator); + lzma_next_coder_init(&index_decoder_init, next, allocator); if (i == NULL || memlimit == 0) return LZMA_PROG_ERROR; diff --git a/src/liblzma/common/index_encoder.c b/src/liblzma/common/index_encoder.c index 662f646b..e23963ce 100644 --- a/src/liblzma/common/index_encoder.c +++ b/src/liblzma/common/index_encoder.c @@ -189,7 +189,7 @@ extern lzma_ret lzma_index_encoder_init(lzma_next_coder *next, lzma_allocator *allocator, lzma_index *i) { - lzma_next_coder_init(lzma_index_encoder_init, next, allocator); + lzma_next_coder_init(&lzma_index_encoder_init, next, allocator); if (i == NULL) return LZMA_PROG_ERROR; diff --git a/src/liblzma/common/stream_decoder.c b/src/liblzma/common/stream_decoder.c index d5924dea..dcc047d9 100644 --- a/src/liblzma/common/stream_decoder.c +++ b/src/liblzma/common/stream_decoder.c @@ -398,7 +398,7 @@ extern lzma_ret lzma_stream_decoder_init(lzma_next_coder *next, lzma_allocator *allocator, uint64_t memlimit, uint32_t flags) { - lzma_next_coder_init(lzma_stream_decoder_init, next, allocator); + lzma_next_coder_init(&lzma_stream_decoder_init, next, allocator); if (memlimit == 0) return LZMA_PROG_ERROR; diff --git a/src/liblzma/common/stream_encoder.c b/src/liblzma/common/stream_encoder.c index 6303b44a..292efc82 100644 --- a/src/liblzma/common/stream_encoder.c +++ b/src/liblzma/common/stream_encoder.c @@ -211,7 +211,7 @@ extern lzma_ret lzma_stream_encoder_init(lzma_next_coder *next, lzma_allocator *allocator, const lzma_filter *filters, lzma_check check) { - lzma_next_coder_init(lzma_stream_encoder_init, next, allocator); + lzma_next_coder_init(&lzma_stream_encoder_init, next, allocator); if (filters == NULL) return LZMA_PROG_ERROR; -- cgit v1.2.3