SRU Justification:
Impact: removed directories in cifs mounted share can still appear within application calls. This could potentially be a security issue?
Fix: A patch from Steve French fixes the problem, [CIFS] revalidate parent inode when rmdir done within that directory
Test: Originator of the bug tested the kernel in http://people.ubuntu.com/~manjo/lp317274-jaunty and reported to work.
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I found this when updating to subversion 1.5 in hardy backports. Basically a sequence of removing and then confirming a directory has been removed that subversion carries out causes the behaviour. I directory is removed, and then a new readdir call will show the directory is still present.
This has been reported to the samba team and a fix has been comitted to the upstream kernel. Git commit is http://git.kernel.org/?p=linux/kernel/git/sfrench/cifs-2.6.git;a=commit;h=a3952c2de7f7e76bc84d85e5895f70ca10079cd0
I have confirmed this patch fixes the problem on intrepid and hardy latest kernels. This probably affects earlier kernels but I cannot confirm.
I have attached a test application that triggers the behaviour.
This bug is stopping us using subversion 1.5 on a cifs mount, and I assume will affect any one else wanting to do the same.
ProblemType: Bug
Architecture: amd64
Date: Thu Jan 15 10:47:16 2009
Dependencies:
DistroRelease: Ubuntu 8.04
NonfreeKernelModules: nvidia
Package: linux None [modified: /var/lib/dpkg/info/linux.list]
PackageArchitecture: amd64
ProcEnviron:
PATH=/usr/local/kicad/linux/:/home/username/.bin/:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
LANG=en_NZ.UTF-8
SHELL=/bin/bhostname
SourcePackage: linux-meta
Uname: Linux 2.6.24-23-generic x86_64
This is not a bug in the linux-meta package, moving to the linux package.