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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2019-07-02 11:00:41 +0300 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.ibm.com> | 2019-08-06 01:40:28 +0300 |
| commit | 4ece3125f21b1d42b84896c5646dbf0e878464e1 (patch) | |
| tree | e48c770e068bf33bc33a8835c496e22494667d5f /security/integrity | |
| parent | f5e1040196dbfe14c77ce3dfe3b7b08d2d961e88 (diff) | |
| download | linux-4ece3125f21b1d42b84896c5646dbf0e878464e1.tar.xz | |
ima: fix freeing ongoing ahash_request
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>
Diffstat (limited to 'security/integrity')
| -rw-r--r-- | security/integrity/ima/ima_crypto.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index 7532b062be59..73044fc6a952 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -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; } |