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crypto: scomp - Fix null-pointer deref when freeing streams

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As the scomp streams are freed when an algorithm is unregistered,
it is possible that the algorithm has never been used at all (e.g.,
an algorithm that does not have a self-test).  So test whether the
streams exist before freeing them.

Reported-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Fixes: 3d72ad46a23a ("crypto: acomp - Move stream management into scomp layer")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Sourabh Jain <sourabhjain@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2025-04-08 12:20:34 +08:00
parent 1ddaff40c0
commit cfb32c656e
1 changed files with 3 additions and 0 deletions
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3
crypto/scompress.c
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@ -111,6 +111,9 @@ static void scomp_free_streams(struct scomp_alg *alg)
struct crypto_acomp_stream __percpu *stream = alg->stream;
int i;
if (!stream)
return;
for_each_possible_cpu(i) {
struct crypto_acomp_stream *ps = per_cpu_ptr(stream, i);