[Acked] [SRU Xenial, bionic/linux-hwe, focal/linux-oem-5.6 0/1] setting extended attribute may cause memory leak

[Andy Whitcroft]

On Thu, Apr 15, 2021 at 08:23:34PM -0300, Thadeu Lima de Souza Cascardo wrote:
> BugLink: https://bugs.launchpad.net/bugs/1924611
> 
> [Impact]
> A memory leak may happen when an error happens when setting extended
> attributes.
> 
> [Fix]
> The issue was introduced by an improper backport, so the fix is specific to
> Ubuntu, so a SAUCE patch.
> 
> [Test case]
> Test setting attribute under a user namespace.
> 
> [Regression potential]
> A double free bug might be introduced. Or setting extended attributes might
> fail.
> 
> Thadeu Lima de Souza Cascardo (1):
>   UBUNTU: SAUCE: vfs_setxattr: free converted value if xattr_permission
>     returns error
> 
>  fs/xattr.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)

Acked-by: Andy Whitcroft <apw at canonical.com>

-apw