When allocate crypto algorithms, e.g. crypto_alloc_shash(), using
template model will run into the path that call module_request().
But there have no any module alias that match with the template name.
e.g.
Enable the module_request tracing event then run "modprobe tcrypt
mode=10" to test, it produces module_request event:
[...]
modprobe-4965 [000] .... 123.504690: module_request: ecb(aes)
wait=1 call_site=crypto_larval_lookup
modprobe-4965 [002] .... 123.506826: module_request:
ecb(aes)-all wait=1 call_site=crypto_larval_lookup
cryptomgr_probe-4970 [003] .... 123.509007: module_request: ecb
wait=1 call_site=crypto_lookup_template
Here should not call module_request() for ecb(aes) because the template
name doesn't match with any driver's alias.
This patch add the name checking in crypto_larval_lookup() to
filter out the template before request kernel module.
Signed-off-by: Lee, Chun-Yi <jlee@xxxxxxxx>
---
crypto/api.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/crypto/api.c b/crypto/api.c
index a2b39c5..9aac892 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -215,7 +215,7 @@ struct crypto_alg *crypto_larval_lookup(const char *name, u32 type, u32 mask)
type &= mask;
alg = crypto_alg_lookup(name, type, mask);
- if (!alg) {
+ if (!alg && !strchr(name, '(')) {
request_module("%s", name);
if (!((type ^ CRYPTO_ALG_NEED_FALLBACK) & mask &
--
1.6.4.2
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