diff --git a/backport-libkmod-do-not-crash-on-unknown-signature-algorithm.patch b/backport-libkmod-do-not-crash-on-unknown-signature-algorithm.patch
new file mode 100644
index 0000000000000000000000000000000000000000..78cc8a90394999570181acec131f7dffe495768d
--- /dev/null
+++ b/backport-libkmod-do-not-crash-on-unknown-signature-algorithm.patch
@@ -0,0 +1,40 @@
+From d5950b0b5e66a5ec1c21b638dec3974056aaabeb Mon Sep 17 00:00:00 2001
+From: Mikhail Novosyolov <m.novosyolov@rosalinux.ru>
+Date: Sun, 25 Sep 2022 17:46:08 +0300
+Subject: libkmod: do not crash on unknown signature algorithm
+
+Conflict:NA
+Reference:https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git/commit?id=d5950b0b5e66a5ec1c21b638dec3974056aaabeb
+
+Example kernel module:
+https://file-store.rosalinux.ru/download/7281f97e0c04c0f818ad3f936706f4a407e8dc7e
+(/lib/modules/5.15.67-generic-1rosa2021.1-x86_64/kernel/drivers/usb/host/xhci-pci.ko.zst)
+It is signed with Streebog 512.
+
+libkmod v30 crashed in libkmod-module.c:2413 in this code:
+
+n = kmod_module_info_append(list,
+	"sig_hashalgo", strlen("sig_hashalgo"),
+	sig_info.hash_algo, strlen(sig_info.hash_algo));
+
+because strlen() got null.
+---
+ libkmod/libkmod-signature.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/libkmod/libkmod-signature.c b/libkmod/libkmod-signature.c
+index 4ae5af6..092f396 100644
+--- a/libkmod/libkmod-signature.c
++++ b/libkmod/libkmod-signature.c
+@@ -278,6 +278,9 @@ static bool fill_pkcs7(const char *mem, off_t size,
+ 	X509_ALGOR_get0(&o, NULL, NULL, dig_alg);
+ 
+ 	sig_info->hash_algo = pkey_hash_algo[obj_to_hash_algo(o)];
++	// hash algo has not been recognized
++	if (sig_info->hash_algo == NULL)
++		goto err3;
+ 	sig_info->id_type = pkey_id_type[modsig->id_type];
+ 
+ 	pvt = malloc(sizeof(*pvt));
+-- 
+cgit 
diff --git a/kmod.spec b/kmod.spec
index 91c58384063abccc7c6573ec46e0a93ad81fafbd..8c37d946c333e5f5aa356a0a254b3047aa8ed567 100644
--- a/kmod.spec
+++ b/kmod.spec
@@ -1,6 +1,6 @@
 Name:           kmod
 Version:        29
-Release:        4
+Release:        5
 Summary:        Kernel module management
 # GPLv2+ is used by programs, LGPLv2+ is used for libraries.
 License:        GPLv2+ and LGPLv2+
@@ -14,6 +14,8 @@ Patch2:		0002-Module-replace-the-module-with-new-module.patch
 Patch3:		0003-Module-suspend-the-module-by-rmmod-r-option.patch
 Patch4: 	0004-don-t-check-module-s-refcnt-when-rmmod-with-r.patch
 
+Patch6000:      backport-libkmod-do-not-crash-on-unknown-signature-algorithm.patch
+
 BuildRequires:  gcc chrpath zlib-devel xz-devel libxslt openssl-devel
 
 Provides:       module-init-tools = 4.0-1
@@ -120,6 +122,9 @@ install -m 0644 %{SOURCE2} $RPM_BUILD_ROOT%{_sysconfdir}/depmod.d/dist.conf
 %doc TODO NEWS README
 
 %changelog
+* Fri Dec 23 2022 Lai Hangliang <laihangliang1@huawei.com> - 29-5
+- libkmod: do not crash on unknown signature algorithm
+
 * Thu Feb 24 2022 Yang Yanchao <yangyanchao6@huawei.com> - 29-4
 - add package python3-kmod.