5.15-stable review patch. If anyone has any objections, please let me know.
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From: Herbert Xu herbert@gondor.apana.org.au
commit b7b39df7e710b0068356e4c696af07aa10e2cd3d upstream.
Ensure refcount is raised before request is enqueued since it could be dequeued before the call returns.
Reported-by: Sean Anderson sean.anderson@linux.dev Cc: stable@vger.kernel.org Fixes: 11144416a755 ("crypto: caam/qi - optimize frame queue cleanup") Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Reviewed-by: Horia Geantă horia.geanta@nxp.com Tested-by: Sean Anderson sean.anderson@linux.dev Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/crypto/caam/qi.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/crypto/caam/qi.c +++ b/drivers/crypto/caam/qi.c @@ -115,12 +115,12 @@ int caam_qi_enqueue(struct device *qidev qm_fd_addr_set64(&fd, addr);
do { + refcount_inc(&req->drv_ctx->refcnt); ret = qman_enqueue(req->drv_ctx->req_fq, &fd); - if (likely(!ret)) { - refcount_inc(&req->drv_ctx->refcnt); + if (likely(!ret)) return 0; - }
+ refcount_dec(&req->drv_ctx->refcnt); if (ret != -EBUSY) break; num_retries++;