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fs/mount_setattr: always cleanup mount_kattr
commit 012e332 upstream. Make sure that finish_mount_kattr() is called after mount_kattr was succesfully built in both the success and failure case to prevent leaking any references we took when we built it. We returned early if path lookup failed thereby risking to leak an additional reference we took when building mount_kattr when an idmapped mount was requested. Cc: linux-fsdevel@vger.kernel.org Cc: stable@vger.kernel.org Fixes: 9caccd4 ("fs: introduce MOUNT_ATTR_IDMAP") Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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