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liblzma: lzma_str_to_filters: Set *error_pos on all errors

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The API docs clearly say that if error_pos isn't NULL then *error
is always set on any error. However, it wasn't touched if str == NULL
or filters == NULL or unsupported flags were specified.

Fixes: cedeeca2ea6ada5b0411b2ae10d7a859e837f203
This commit is contained in:
Lasse Collin 2024-04-22 21:54:39 +03:00
parent ed8e552395
commit 70d12dd069
1 changed files with 6 additions and 0 deletions
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6
src/liblzma/common/string_conversion.c
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@ -1002,6 +1002,12 @@ extern LZMA_API(const char *)
lzma_str_to_filters(const char *str, int *error_pos, lzma_filter *filters,
uint32_t flags, const lzma_allocator *allocator)
{
// If error_pos isn't NULL, *error_pos must always be set.
// liblzma <= 5.4.6 and <= 5.6.1 have a bug and don't do this
// when str == NULL or filters == NULL or flags are unsupported.
if (error_pos != NULL)
*error_pos = 0;
if (str == NULL || filters == NULL)
return "Unexpected NULL pointer argument(s) "
"to lzma_str_to_filters()";