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liblzma: Stream decoder: Fix restarting after LZMA_MEMLIMIT_ERROR.

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If lzma_code() returns LZMA_MEMLIMIT_ERROR it is now possible
to use lzma_memlimit_set() to increase the limit and continue
decoding. This was supposed to work from the beginning but
there was a bug. With other decoders (.lzma or threaded .xz)
this already worked correctly.
This commit is contained in:
Lasse Collin 2022-09-28 11:05:15 +03:00
parent 2caa9580e5
commit 976f897bbb
1 changed files with 13 additions and 3 deletions
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16
src/liblzma/common/stream_decoder.c
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@ -18,7 +18,8 @@ typedef struct {
enum { enum {
SEQ_STREAM_HEADER, SEQ_STREAM_HEADER,
SEQ_BLOCK_HEADER, SEQ_BLOCK_HEADER,
SEQ_BLOCK, SEQ_BLOCK_INIT,
SEQ_BLOCK_RUN,
SEQ_INDEX, SEQ_INDEX,
SEQ_STREAM_FOOTER, SEQ_STREAM_FOOTER,
SEQ_STREAM_PADDING, SEQ_STREAM_PADDING,
@ -185,6 +186,15 @@ stream_decode(void *coder_ptr, const lzma_allocator *allocator,
return LZMA_OK; return LZMA_OK;
coder->pos = 0; coder->pos = 0;
coder->sequence = SEQ_BLOCK_INIT;
}
// Fall through
case SEQ_BLOCK_INIT: {
// Checking memusage and doing the initialization needs
// its own sequence point because we need to be able to
// retry if we return LZMA_MEMLIMIT_ERROR.
// Version 1 is needed to support the .ignore_check option. // Version 1 is needed to support the .ignore_check option.
coder->block_options.version = 1; coder->block_options.version = 1;
@ -243,12 +253,12 @@ stream_decode(void *coder_ptr, const lzma_allocator *allocator,
if (ret != LZMA_OK) if (ret != LZMA_OK)
return ret; return ret;
coder->sequence = SEQ_BLOCK; coder->sequence = SEQ_BLOCK_RUN;
} }
// Fall through // Fall through
case SEQ_BLOCK: { case SEQ_BLOCK_RUN: {
const lzma_ret ret = coder->block_decoder.code( const lzma_ret ret = coder->block_decoder.code(
coder->block_decoder.coder, allocator, coder->block_decoder.coder, allocator,
in, in_pos, in_size, out, out_pos, out_size, in, in_pos, in_size, out, out_pos, out_size,