[ Upstream commit 93ef8305 ]

When it fails to allocate fragment, it does not free and return error.
And check the pointer inappropriately.

Fixed merge conflicts with
commit 61888776 ("kunit: update NULL vs IS_ERR() tests")
Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: NYoungJun.park <her0gyugyu@gmail.com>
Reviewed-by: NDavid Gow <davidgow@google.com>
Signed-off-by: NShuah Khan <skhan@linuxfoundation.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>