Re: [PATCH] sysfs: Don't leak secdata when a sysfs_dirent is freed.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Grr.  Please all ignore the 01/42 in the subject.  Clearly I was
a bit too tired when I sent this but the fix is good and fixes a bug
2.6.32-rc5 that should be there in the first place.


ebiederm@xxxxxxxxxxxx (Eric W. Biederman) writes:

> While refreshing my sysfs patches I noticed a leak in the secdata
> implementation.  We don't free the secdata when we free the
> sysfs dirent. 
>
> This is a bug in 2.6.32-rc5 that we really should close.
>
> Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxxxxxxxx>

> ---
>  fs/sysfs/dir.c |    4 ++++
>  1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
> index 5fad489..e020183 100644
> --- a/fs/sysfs/dir.c
> +++ b/fs/sysfs/dir.c
> @@ -21,6 +21,7 @@
>  #include <linux/completion.h>
>  #include <linux/mutex.h>
>  #include <linux/slab.h>
> +#include <linux/security.h>
>  #include "sysfs.h"
>  
>  DEFINE_MUTEX(sysfs_mutex);
> @@ -285,6 +286,9 @@ void release_sysfs_dirent(struct sysfs_dirent * sd)
>  		sysfs_put(sd->s_symlink.target_sd);
>  	if (sysfs_type(sd) & SYSFS_COPY_NAME)
>  		kfree(sd->s_name);
> +	if (sd->s_iattr && sd->s_iattr->ia_secdata)
> +		security_release_secctx(sd->s_iattr->ia_secdata,
> +					sd->s_iattr->ia_secdata_len);
>  	kfree(sd->s_iattr);
>  	sysfs_free_ino(sd->s_ino);
>  	kmem_cache_free(sysfs_dir_cachep, sd);
> -- 
> 1.6.5.2.143.g8cc62
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
--
To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [Samba]     [Device Mapper]     [CEPH Development]
  Powered by Linux