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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2025-02-27 17:04:46 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-04 14:42:01 +0200 |
| commit | 0acdc4d6e679ba31d01e3e7e2e4124b76d6d8e2a (patch) | |
| tree | a765836e774b2049884260c713639de77f10a328 /crypto | |
| parent | ab4545a2540b7039851ba8aa3e356a45da9f724e (diff) | |
| download | linux-0acdc4d6e679ba31d01e3e7e2e4124b76d6d8e2a.tar.gz linux-0acdc4d6e679ba31d01e3e7e2e4124b76d6d8e2a.tar.bz2 linux-0acdc4d6e679ba31d01e3e7e2e4124b76d6d8e2a.zip | |
crypto: lzo - Fix compression buffer overrun
[ Upstream commit cc47f07234f72cbd8e2c973cdbf2a6730660a463 ]
Unlike the decompression code, the compression code in LZO never
checked for output overruns. It instead assumes that the caller
always provides enough buffer space, disregarding the buffer length
provided by the caller.
Add a safe compression interface that checks for the end of buffer
before each write. Use the safe interface in crypto/lzo.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/lzo-rle.c | 2 | ||||
| -rw-r--r-- | crypto/lzo.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/crypto/lzo-rle.c b/crypto/lzo-rle.c index 0631d975bfac..0abc2d87f042 100644 --- a/crypto/lzo-rle.c +++ b/crypto/lzo-rle.c @@ -55,7 +55,7 @@ static int __lzorle_compress(const u8 *src, unsigned int slen, size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */ int err; - err = lzorle1x_1_compress(src, slen, dst, &tmp_len, ctx); + err = lzorle1x_1_compress_safe(src, slen, dst, &tmp_len, ctx); if (err != LZO_E_OK) return -EINVAL; diff --git a/crypto/lzo.c b/crypto/lzo.c index ebda132dd22b..8338851c7406 100644 --- a/crypto/lzo.c +++ b/crypto/lzo.c @@ -55,7 +55,7 @@ static int __lzo_compress(const u8 *src, unsigned int slen, size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */ int err; - err = lzo1x_1_compress(src, slen, dst, &tmp_len, ctx); + err = lzo1x_1_compress_safe(src, slen, dst, &tmp_len, ctx); if (err != LZO_E_OK) return -EINVAL; |