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Mon, 06 Jul 2026 09:04:05 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Mon, 06 Jul 2026 12:04:04 -0400 Message-Id: To: "Malaya Kumar Rout" , , , Cc: "Alexei Starovoitov" , "Eduard Zingerman" , "Kumar Kartikeya Dwivedi" , "Song Liu" , "Yonghong Song" , "Jiri Olsa" , "Emil Tsalapatis" , "Shuah Khan" , "John Fastabend" , , , Subject: Re: [PATCH v2] selftests/bpf: Fix memory leak in msg_alloc_iov error path From: "Emil Tsalapatis" X-Mailer: aerc 0.21.0-0-g5549850facc2 References: <7f3e0f9992a32264f6c7cf00f2ef3ce87a0a6fbd6703084aff3de68cda77dc9c@mail.kernel.org> <20260704122936.102394-1-malayarout91@gmail.com> In-Reply-To: <20260704122936.102394-1-malayarout91@gmail.com> On Sat Jul 4, 2026 at 8:29 AM EDT, Malaya Kumar Rout wrote: > In msg_alloc_iov(), when calloc() fails for an individual iov_base > allocation, the error path frees all previously allocated iov_base > entries but fails to free the iov array itself that was allocated > with calloc() at the beginning of the function. This results in a > memory leak of the iov array. > > Add free(iov) in the unwind_iov error path to ensure proper cleanup > of all allocated memory. > > Fixes: 753fb2ee0934 ("bpf: sockmap, add msg_peek tests to test_sockmap") > Signed-off-by: Malaya Kumar Rout Reviewed-by: Emil Tsalapatis > --- > tools/testing/selftests/bpf/test_sockmap.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/s= elftests/bpf/test_sockmap.c > index ac814eb63edb..3e6be455d158 100644 > --- a/tools/testing/selftests/bpf/test_sockmap.c > +++ b/tools/testing/selftests/bpf/test_sockmap.c > @@ -436,6 +436,7 @@ static int msg_alloc_iov(struct msghdr *msg, > unwind_iov: > for (i--; i >=3D 0 ; i--) > free(msg->msg_iov[i].iov_base); > + free(iov); > return -ENOMEM; > } > =20