2022-07-11 07:30:31

by Jianglei Nie

Subject: [PATCH] ima/evm: Fix potential memory leak in ima_init_crypto()

This patch adds the missing kfree() for ima_algo_array allocated by
kcalloc() to avoid potential memory leak.

Signed-off-by: Jianglei Nie <[email protected]>
---
security/integrity/ima/ima_crypto.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c
index a7206cc1d7d1..64499056648a 100644
--- a/security/integrity/ima/ima_crypto.c
+++ b/security/integrity/ima/ima_crypto.c
@@ -205,6 +205,7 @@ int __init ima_init_crypto(void)

crypto_free_shash(ima_algo_array[i].tfm);
}
+ kfree(ima_algo_array);
out:
crypto_free_shash(ima_shash_tfm);
return rc;
--
2.25.1

2022-07-11 12:32:47

by Mimi Zohar

Subject: Re: [PATCH] ima/evm: Fix potential memory leak in ima_init_crypto()

On Mon, 2022-07-11 at 15:22 +0800, Jianglei Nie wrote:
> This patch adds the missing kfree() for ima_algo_array allocated by
> kcalloc() to avoid potential memory leak.

Missing is the reason that ima_algo_array is being freed.

Perhaps something like,
"On failure to allocate the SHA1 tfm, IMA fails to initialize and exits
without freeing the ima_algo_array. Add the missing kfree() for
ima_algo_array to avoid the potential memory leak."

thanks,

Mimi