On Mon, May 20, 2024 at 11:49:56AM -0400, Nícolas F. R. A. Prado wrote:
>
> Unfortunately this patch didn't work either. The warning is still there
> unchanged.
OK perhaps we can do it by calling current_is_async ourselves.
But this is really a nasty hack because it basically defeats
the whole point of loading optional algorithm by module.
Linus/Tejun, is it time perhaps to remove the warning introduced
by commit 0fdff3ec6d87856cdcc99e69cf42143fdd6c56b4 since it's
been ten years since the warning caused a real problem?
For the Crypto API, if it is called by some random driver via the
async context, this warning stops us from loading any modules
without printing a nasty warning that isn't relevant as the Crypto
API never calls async_synchronize_full.
---8<---
Do not call request_module if this is the case or a warning will
be printed.
Reported-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
Reported-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
---
crypto/api.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/crypto/api.c b/crypto/api.c
index 22556907b3bc..7c4b9f86c1ad 100644
--- a/crypto/api.c
+++ b/crypto/api.c
@@ -10,6 +10,7 @@
* and Nettle, by Niels Möller.
*/
+#include <linux/async.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/jump_label.h>
@@ -280,7 +281,8 @@ static struct crypto_alg *crypto_larval_lookup(const char *name, u32 type,
mask &= ~(CRYPTO_ALG_LARVAL | CRYPTO_ALG_DEAD);
alg = crypto_alg_lookup(name, type, mask);
- if (!alg && !(mask & CRYPTO_NOLOAD)) {
+ if (!alg && !(mask & CRYPTO_NOLOAD) &&
+ (!IS_BUILTIN(CONFIG_CRYPTO) || !current_is_async())) {
request_module("crypto-%s", name);
if (!((type ^ CRYPTO_ALG_NEED_FALLBACK) & mask &
--
2.39.2
--
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
