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crypto: scompress - Fix scratch allocation failure handling

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If the scratch allocation fails, all subsequent allocations will
silently succeed without actually allocating anything.  Fix this
by only incrementing users when the allocation succeeds.

Fixes: 6a8487a1f2 ("crypto: scompress - defer allocation of scratch buffer to first use")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2025-03-15 20:37:36 +08:00
parent 7e0969bae4
commit ddd0a42671
1 changed files with 5 additions and 1 deletions
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6
crypto/scompress.c
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@ -159,8 +159,12 @@ static int crypto_scomp_init_tfm(struct crypto_tfm *tfm)
if (ret)
goto unlock;
}
if (!scomp_scratch_users++)
if (!scomp_scratch_users) {
ret = crypto_scomp_alloc_scratches();
if (ret)
goto unlock;
scomp_scratch_users++;
}
unlock:
mutex_unlock(&scomp_lock);