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s390/pkey: Wipe sensitive data on failure

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[ Upstream commit 1d8c270de5eb74245d72325d285894a577a945d9 ]

Wipe sensitive data from stack also if the copy_to_user() fails.

Suggested-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Holger Dengler <dengler@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Holger Dengler 2024-05-07 17:03:18 +02:00 committed by Greg Kroah-Hartman
parent 0b3246052e
commit b5eb9176eb
1 changed files with 2 additions and 2 deletions
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4
drivers/s390/crypto/pkey_api.c
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@ -784,7 +784,7 @@ static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd,
if (rc)
break;
if (copy_to_user(ucs, &kcs, sizeof(kcs)))
return -EFAULT;
rc = -EFAULT;
memzero_explicit(&kcs, sizeof(kcs));
break;
}
@ -816,7 +816,7 @@ static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd,
if (rc)
break;
if (copy_to_user(ucp, &kcp, sizeof(kcp)))
return -EFAULT;
rc = -EFAULT;
memzero_explicit(&kcp, sizeof(kcp));
break;
}