lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Wed, 26 Dec 2012 13:08:17 +0800
From:	Chen Gang <>
To:	Theodore Ts'o <>
Subject: Re: [PATCH] fs/ext3: use kzalloc instead of kmalloc

于 2012年12月26日 12:45, Theodore Ts'o 写道:
> On Wed, Dec 26, 2012 at 11:15:19AM +0800, Chen Gang wrote:
>>   checking the ext3_acl_size, it does not like what you said above.
>>   but we can say, the design for ext3_acl_size is really not quit well.
>>     (maybe can cause issue).
> Ah, I see.  What's there is OK, but it's not at all obvious that it's
> OK.  A valid acl must have a very specific order of tags, as enforced
> by posix_acl_valid() in fs/posix_acl.c:
> [1] Where * is the regexp sense of "0 or more times"
> [2] Only if there is at least one ACL_USER or ACL_GROUP tag; otherwise
> 	skip ACL_MASK.
> Hence, a valid acl can have at most 4 short acl entry types
> (ACL_USER_OBJ, ACL_GROUP, ACL_MASK, and ACL_OTHER), and if there is
> less than 4 acl entries, they must all be short acl types.
> All I can say is, this is a horrible way of coding things, and I wish
> this was documented explicitly somewhere either in fs/posix_acl.c or
> in include/linux/posix_acl.h.  Yuck, yuck, yuck....
> 						- Ted



  also better to give a comment above the function ext3_acl_size.


Chen Gang

Asianux Corporation
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists