[Bug 13909] md5sum on 3GB file is constantly hanging

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http://bugzilla.kernel.org/show_bug.cgi?id=13909





--- Comment #28 from Roland Kletzing <devzero@xxxxxx>  2009-08-15 13:54:43 ---
rus,any chance to try the attached patch and confirm if it is the real fix for
the problem ?



We're now able to duplicate this bug. Not sure why it only affects ext4.

ima: kernel_read parm integer overflow bugfix

Reading large files >2G causes process to loop.
(http://bugzilla.kernel.org/show_bug.cgi?id=13909)

Signed-off-by: Mimi Zohar <zohar@xxxxxxxxxx>

Index: security-testing-2.6/security/integrity/ima/ima_crypto.c
===================================================================
--- security-testing-2.6.orig/security/integrity/ima/ima_crypto.c
+++ security-testing-2.6/security/integrity/ima/ima_crypto.c
@@ -47,7 +47,8 @@ int ima_calc_hash(struct file *file, cha
struct scatterlist sg[1];
loff_t i_size;
char *rbuf;
- int rc, offset = 0;
+ unsigned long offset = 0;
+ int rc;

rc = init_desc(&desc);
if (rc != 0)

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