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| author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2009-08-21 14:32:49 -0400 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2009-08-24 14:58:29 +1000 |
| commit | 16bfa38b1936212428cb38fbfbbb8f6c62b8d81f (patch) | |
| tree | bf7f3722ebfddf3d3fee3d0f9c704e0c1c794b90 /security/integrity/ima/ima_crypto.c | |
| parent | 6777d773a463ac045d333b989d4e44660f8d92ad (diff) | |
| download | lwn-16bfa38b1936212428cb38fbfbbb8f6c62b8d81f.tar.gz lwn-16bfa38b1936212428cb38fbfbbb8f6c62b8d81f.zip | |
ima: hashing large files bug fix
Hashing files larger than INT_MAX causes process to loop.
Dependent on redefining kernel_read() offset type to loff_t.
(http://bugzilla.kernel.org/show_bug.cgi?id=13909)
Cc: stable@kernel.org
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/integrity/ima/ima_crypto.c')
| -rw-r--r-- | security/integrity/ima/ima_crypto.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/security/integrity/ima/ima_crypto.c b/security/integrity/ima/ima_crypto.c index 63003a63aaee..46642a19bc78 100644 --- a/security/integrity/ima/ima_crypto.c +++ b/security/integrity/ima/ima_crypto.c @@ -45,9 +45,9 @@ int ima_calc_hash(struct file *file, char *digest) { struct hash_desc desc; struct scatterlist sg[1]; - loff_t i_size; + loff_t i_size, offset = 0; char *rbuf; - int rc, offset = 0; + int rc; rc = init_desc(&desc); if (rc != 0) @@ -67,6 +67,8 @@ int ima_calc_hash(struct file *file, char *digest) rc = rbuf_len; break; } + if (rbuf_len == 0) + break; offset += rbuf_len; sg_init_one(sg, rbuf, rbuf_len); |