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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2019-07-02 10:00:40 +0200 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.ibm.com> | 2019-08-05 18:40:27 -0400 |
| commit | f5e1040196dbfe14c77ce3dfe3b7b08d2d961e88 (patch) | |
| tree | e369877467e809e5557e7c2d9446b0612a8b37bb /security | |
| parent | e5092255bb3967bcc473dc86492dbbd5f7714023 (diff) | |
| download | linux-f5e1040196dbfe14c77ce3dfe3b7b08d2d961e88.tar.bz2 | |
ima: always return negative code for error
integrity_kernel_read() returns the number of bytes read. If this is
a short read then this positive value is returned from
ima_calc_file_hash_atfm(). Currently this is only indirectly called from
ima_calc_file_hash() and this function only tests for the return value
being zero or nonzero and also doesn't forward the return value.
Nevertheless there's no point in returning a positive value as an error,
so translate a short read into -EINVAL.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'security')
| -rw-r--r-- | security/integrity/ima/ima_crypto.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index d4c7b8e1b083..7532b062be59 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -268,8 +268,11 @@ static int ima_calc_file_hash_atfm(struct file *file, rbuf_len = min_t(loff_t, i_size - offset, rbuf_size[active]); rc = integrity_kernel_read(file, offset, rbuf[active], rbuf_len); - if (rc != rbuf_len) + if (rc != rbuf_len) { + if (rc >= 0) + rc = -EINVAL; goto out3; + } if (rbuf[1] && offset) { /* Using two buffers, and it is not the first |