The flag CRYPTO_ALG_ALLOCATES_MEMORY indicates that an algorithm might allocate memory in the datapath and therefore sleep. Dm-integrity is filtering out implementations of skcipher algorithms that have this flag set. However, in the same function it does allocations with GFP_KERNEL. As dm-integrity is re-entrant and capable of handling sleeps that could occur during allocations with GFP_KERNEL, then it is also capable of using skcipher algorithm implementations that have CRYPTO_ALG_ALLOCATES_MEMORY set. Remove the filtering of skcipher implementations with the flag CRYPTO_ALG_ALLOCATES_MEMORY set. Suggested-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Link: https://lore.kernel.org/linux-crypto/ZILvtASXQKLG43y9@xxxxxxxxxxxxxxxxxxx/ Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@xxxxxxxxx> Reviewed-by: Fiona Trahe <fiona.trahe@xxxxxxxxx> --- drivers/md/dm-integrity.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c index 31838b13ea54..a1013eff01b4 100644 --- a/drivers/md/dm-integrity.c +++ b/drivers/md/dm-integrity.c @@ -3785,7 +3785,7 @@ static int create_journal(struct dm_integrity_c *ic, char **error) struct journal_completion comp; comp.ic = ic; - ic->journal_crypt = crypto_alloc_skcipher(ic->journal_crypt_alg.alg_string, 0, CRYPTO_ALG_ALLOCATES_MEMORY); + ic->journal_crypt = crypto_alloc_skcipher(ic->journal_crypt_alg.alg_string, 0, 0); if (IS_ERR(ic->journal_crypt)) { *error = "Invalid journal cipher"; r = PTR_ERR(ic->journal_crypt); -- 2.40.1
