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ima: hashing large files bug fix

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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>
This commit is contained in:
Mimi Zohar 2009-08-21 14:32:49 -04:00 committed by James Morris
parent 6777d773a4
commit 16bfa38b19
1 changed files with 4 additions and 2 deletions
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6
security/integrity/ima/ima_crypto.c
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@ -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);