misc/149495: chflags sappend on zfs not working right

Daniel Zhelev daniel at zhelev.biz
Tue Aug 10 12:10:03 UTC 2010


>Number:         149495
>Category:       misc
>Synopsis:       chflags sappend on zfs not working right
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Aug 10 12:10:02 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator:     Daniel Zhelev
>Release:        8.1-RELEASE
>Organization:
none
>Environment:
root at wolfdale~# uname -a
FreeBSD wolfdale.sgate.org 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Mon Jul 19 02:36:49 UTC 2010     root at mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64
root at wolfdale~# 

>Description:
chmod o= /var/log/critical
chflags sappnd /var/log/critical
chflags sappnd /var/log/critical/* 
root at wolfdale/var/log/critical# echo "test" > critical.log
critical.log: Operation not permitted.
root at wolfdale/var/log/critical# echo "test" >> critical.log
root at wolfdale/var/log/critical# grep test critical.log 
Filesystem    1K-blocks Used   Avail Capacity  Mounted on
zroot/var/log   5242880  106 5242774     0%    /var/log
root at wolfdale~# sysctl kern.securelevel
kern.securelevel: 1

Flag sappnd/sappend is permitting also write to file not only delete on ZFS mounts. 
Submitting but-report since it is marked as done in http://wiki.freebsd.org/ZFS
Not tested other flags, please contact me if you need me to.


>How-To-Repeat:
Described above.
>Fix:
Using zvol with UFS on it - workaround 

>Release-Note:
>Audit-Trail:
>Unformatted:


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