The patch name seems a little weird? The commit id is better to be put 
in 'Upstream-Status: Backport [xxxx]'.

Regards,
Chen Qi

On 06/17/2021 04:49 PM, Alexander Kanavin wrote:
> Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
> ---
>   meta/recipes-core/util-linux/util-linux.inc   |  1 +
>   ...74160b96498d672e3652827aa7e6d7f3a120.patch | 29 +++++++++++++++++++
>   2 files changed, 30 insertions(+)
>   create mode 100644 meta/recipes-core/util-linux/util-linux/8a3a74160b96498d672e3652827aa7e6d7f3a120.patch
>
> diff --git a/meta/recipes-core/util-linux/util-linux.inc b/meta/recipes-core/util-linux/util-linux.inc
> index 6a7a6a968f..9d7d8a23aa 100644
> --- a/meta/recipes-core/util-linux/util-linux.inc
> +++ b/meta/recipes-core/util-linux/util-linux.inc
> @@ -35,5 +35,6 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/utils/util-linux/v${MAJOR_VERSION}/util-lin
>              file://run-ptest \
>              file://display_testname_for_subtest.patch \
>              file://avoid_parallel_tests.patch \
> +           file://8a3a74160b96498d672e3652827aa7e6d7f3a120.patch \
>              "
>   SRC_URI[sha256sum] = "bd07b7e98839e0359842110525a3032fdb8eaf3a90bedde3dd1652d32d15cce5"
> diff --git a/meta/recipes-core/util-linux/util-linux/8a3a74160b96498d672e3652827aa7e6d7f3a120.patch b/meta/recipes-core/util-linux/util-linux/8a3a74160b96498d672e3652827aa7e6d7f3a120.patch
> new file mode 100644
> index 0000000000..a5bb00ab65
> --- /dev/null
> +++ b/meta/recipes-core/util-linux/util-linux/8a3a74160b96498d672e3652827aa7e6d7f3a120.patch
> @@ -0,0 +1,29 @@
> +From 8a3a74160b96498d672e3652827aa7e6d7f3a120 Mon Sep 17 00:00:00 2001
> +From: Karel Zak <kzak@redhat.com>
> +Date: Tue, 15 Jun 2021 12:04:43 +0200
> +Subject: [PATCH] mkswap: fix holes detection (infinite loop and/or
> + stack-buffer-underflow)
> +
> +Reported-by: Brian Lane <bcl@redhat.com>
> +Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1971877
> +Fix: https://github.com/karelzak/util-linux/issues/1348
> +Signed-off-by: Karel Zak <kzak@redhat.com>
> +Upstream-Status: Backport
> +Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
> +---
> + disk-utils/mkswap.c | 2 ++
> + 1 file changed, 2 insertions(+)
> +
> +diff --git a/disk-utils/mkswap.c b/disk-utils/mkswap.c
> +index 27374fd72..c45a3a317 100644
> +--- a/disk-utils/mkswap.c
> ++++ b/disk-utils/mkswap.c
> +@@ -267,6 +267,8 @@ static void check_extents(struct mkswap_control *ctl)
> + 			return;
> +
> + 		n = fiemap->fm_mapped_extents;
> ++		if (n == 0)
> ++			break;
> +
> + 		for (i = 0; i < n; i++) {
> + 			struct fiemap_extent *e = &fiemap->fm_extents[i];
>
>
> 
>