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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-06-20 22:01:41 -0700 |
|---|---|---|
| committer | Simon Shields <keepcalm444@gmail.com> | 2016-06-12 21:20:11 +1000 |
| commit | 69a113aae3d8c2753f68d0b64f0219d9cc6e493f (patch) | |
| tree | c6582ca7a9a2bcf4baeabea2f5fb723aa0c9f8a4 /lib | |
| parent | fab4f77d0ecc98293ec060bc9c77303db7dbdc46 (diff) | |
| download | kernel_samsung_smdk4412-69a113aae3d8c2753f68d0b64f0219d9cc6e493f.tar.gz kernel_samsung_smdk4412-69a113aae3d8c2753f68d0b64f0219d9cc6e493f.tar.bz2 kernel_samsung_smdk4412-69a113aae3d8c2753f68d0b64f0219d9cc6e493f.zip | |
lz4: ensure length does not wrap
Given some pathologically compressed data, lz4 could possibly decide to
wrap a few internal variables, causing unknown things to happen. Catch
this before the wrapping happens and abort the decompression.
Reported-by: "Don A. Bailey" <donb@securitymouse.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/lz4/lz4_decompress.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/lz4/lz4_decompress.c b/lib/lz4/lz4_decompress.c index df6839e3ce0..99a03acb7d4 100644 --- a/lib/lz4/lz4_decompress.c +++ b/lib/lz4/lz4_decompress.c @@ -72,6 +72,8 @@ static int lz4_uncompress(const char *source, char *dest, int osize) len = *ip++; for (; len == 255; length += 255) len = *ip++; + if (unlikely(length > (size_t)(length + len))) + goto _output_error; length += len; } |