Hi,
On Thu, 26 May 2011 11:10:07 +0200, dexen deVries wrote:
> Hi list,
> 
> in /etc/rc.d/rc.local I have a command starting cleanerd for root filesystem:
> # /sbin/nilfs_cleanerd -c /etc/nilfs_cleanerd-root.conf /dev/sda3
> 
> At first I wanted a separate config for root filesystem, but now same was to 
> be 
> used for both / and /home. So I've removed the metion of the config file, and 
>  
> the command became:
> 
> # /sbin/nilfs_cleanerd -c /dev/sda3
> 
> (note the -c !)
> ...ended up with nilfs_cleanerd spewing countless errors into 
> /var/log/syslog, 
> like:
> 
> May 26 11:05:08 coil nilfs_cleanerd[18902]: ׸��: unknown keyword
> May 26 11:05:08 coil nilfs_cleanerd[18902]: cˮ���: unknown keyword
> May 26 11:05:08 coil nilfs_cleanerd[18902]: A�;^C�S-�g^W�^Fɂ: unknown keyword
> May 26 11:05:08 coil nilfs_cleanerd[18902]: too long line
> 
> 
> nilfs_cleanerd using whole partition as the config file == fun! ;-)

Okay, so non-regular files should be rejected for the config option ;)

The following patch will resolve this.

Thanks,
Ryusuke Konishi
---
From: Ryusuke Konishi <[email protected]>

nilfs_cleanerd: reject configuration file other than regular file

The current config file option accepts any types of node other than
regular files.  Thus,

 # /sbin/nilfs_cleanerd -c /dev/sda3

will let cleaner daemon read the device as a configuration file.  This
patch prevents the unwanted result.

Reported-by: dexen deVries <[email protected]>
Signed-off-by: Ryusuke Konishi <[email protected]>
---
 sbin/cleanerd/cldconfig.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/sbin/cleanerd/cldconfig.c b/sbin/cleanerd/cldconfig.c
index 46a15ac..1e0d066 100644
--- a/sbin/cleanerd/cldconfig.c
+++ b/sbin/cleanerd/cldconfig.c
@@ -684,6 +684,14 @@ static int nilfs_cldconfig_do_read(struct nilfs_cldconfig 
*config,
 int nilfs_cldconfig_read(struct nilfs_cldconfig *config, const char *path,
                         struct nilfs *nilfs)
 {
+       struct stat stbuf;
+
+       if (stat(path, &stbuf) < 0 || !S_ISREG(stbuf.st_mode)) {
+               syslog(LOG_ERR, "%s: bad configuration file", path);
+               errno = EINVAL;
+               return -1;
+       }
+
        nilfs_cldconfig_set_default(config, nilfs);
        if (nilfs_cldconfig_do_read(config, path, nilfs) < 0)
                syslog(LOG_WARNING, "%s: cannot read", path);
-- 
1.7.3.5

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