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| author | Krzysztof Kolasa <kkolasa@winsoft.pl> | 2015-05-03 22:58:59 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-24 11:56:29 -0700 |
| commit | 99b7e93c95c78952724a9783de6c78def8fbfc3f (patch) | |
| tree | fdd2c8f93ef829138eab5f76391851cd49cbe9cb | |
| parent | 61a590fa67ac3c897e7c21fd75a5c85a4671b384 (diff) | |
| download | linux-99b7e93c95c78952724a9783de6c78def8fbfc3f.tar.gz linux-99b7e93c95c78952724a9783de6c78def8fbfc3f.tar.bz2 linux-99b7e93c95c78952724a9783de6c78def8fbfc3f.zip | |
lz4: fix system halt at boot kernel on x86_64
Sometimes, on x86_64, decompression fails with the following
error:
Decompressing Linux...
Decoding failed
-- System halted
This condition is not needed for a 64bit kernel(from commit d5e7caf):
if( ... ||
(op + COPYLENGTH) > oend)
goto _output_error
macro LZ4_SECURE_COPY() tests op and does not copy any data
when op exceeds the value.
added by analogy to lz4_uncompress_unknownoutputsize(...)
Signed-off-by: Krzysztof Kolasa <kkolasa@winsoft.pl>
Tested-by: Alexander Kuleshov <kuleshovmail@gmail.com>
Tested-by: Caleb Jorden <cjorden@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | lib/lz4/lz4_decompress.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/lib/lz4/lz4_decompress.c b/lib/lz4/lz4_decompress.c index 26cc6029b280..6d940c72b5fc 100644 --- a/lib/lz4/lz4_decompress.c +++ b/lib/lz4/lz4_decompress.c @@ -140,8 +140,12 @@ static int lz4_uncompress(const char *source, char *dest, int osize) /* Error: request to write beyond destination buffer */ if (cpy > oend) goto _output_error; +#if LZ4_ARCH64 + if ((ref + COPYLENGTH) > oend) +#else if ((ref + COPYLENGTH) > oend || (op + COPYLENGTH) > oend) +#endif goto _output_error; LZ4_SECURECOPY(ref, op, (oend - COPYLENGTH)); while (op < cpy) @@ -266,7 +270,13 @@ static int lz4_uncompress_unknownoutputsize(const char *source, char *dest, if (cpy > oend - COPYLENGTH) { if (cpy > oend) goto _output_error; /* write outside of buf */ - +#if LZ4_ARCH64 + if ((ref + COPYLENGTH) > oend) +#else + if ((ref + COPYLENGTH) > oend || + (op + COPYLENGTH) > oend) +#endif + goto _output_error; LZ4_SECURECOPY(ref, op, (oend - COPYLENGTH)); while (op < cpy) *op++ = *ref++; |