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libbacktrace: fix UBSAN issues

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Fix issues mentioned in the PR.

	PR libbacktrace/103167

libbacktrace/ChangeLog:

	* elf.c (elf_uncompress_lzma_block): Cast to unsigned int.
	(elf_uncompress_lzma): Likewise.
	* xztest.c (test_samples): memcpy only if v > 0.
This commit is contained in:
Martin Liska
2021-11-12 14:50:57 +01:00
committed by Ian Lance Taylor
parent c5cc931918
commit 5aa92540f0
2 changed files with 17 additions and 17 deletions
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2
xztest.c
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@@ -172,7 +172,7 @@ test_samples (struct backtrace_state *state)
tests[i].name, uncompressed_len, v);
++failures;
}
else if (memcmp (tests[i].uncompressed, uncompressed, v) != 0)
else if (v > 0 && memcmp (tests[i].uncompressed, uncompressed, v) != 0)
{
size_t j;