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ima: fix freeing ongoing ahash_request

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integrity_kernel_read() can fail in which case we forward to call
ahash_request_free() on a currently running request. We have to wait
for its completion before we can free the request.

This was observed by interrupting a "find / -type f -xdev -print0 | xargs -0
cat 1>/dev/null" with ctrl-c on an IMA enabled filesystem.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
This commit is contained in:
Sascha Hauer 2019-07-02 10:00:41 +02:00 committed by Mimi Zohar
parent f5e1040196
commit 4ece3125f2
1 changed files with 5 additions and 0 deletions
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5
security/integrity/ima/ima_crypto.c
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@ -271,6 +271,11 @@ static int ima_calc_file_hash_atfm(struct file *file,
if (rc != rbuf_len) {
if (rc >= 0)
rc = -EINVAL;
/*
* Forward current rc, do not overwrite with return value
* from ahash_wait()
*/
ahash_wait(ahash_rc, &wait);
goto out3;
}