diff --git a/pkgs/os-specific/linux/kernel/crc-regression.patch b/pkgs/os-specific/linux/kernel/crc-regression.patch
new file mode 100644
index 000000000000..623713d16a65
--- /dev/null
+++ b/pkgs/os-specific/linux/kernel/crc-regression.patch
@@ -0,0 +1,24 @@
+See https://github.com/NixOS/nixpkgs/issues/6231
+
+v3.14.31:crypto/crc32c.c is missing the MODULE_ALIAS_CRYPTO("crc32c").
+That's probably because crypto/crc32c.c was renamed to
+crypto/crc32c_generic.c in commit
+06e5a1f29819759392239669beb2cad27059c8ec and therefore fell through
+the cracks when backporting commit
+5d26a105b5a73e5635eae0629b42fa0a90e07b7b.
+
+So the affected kernels (all that backported the "crypto-" prefix
+patches) need this additional patch:
+
+diff --git a/crypto/crc32c.c b/crypto/crc32c.c
+index 06f7018c9d95..aae5829eb681 100644
+--- a/crypto/crc32c.c
++++ b/crypto/crc32c.c
+@@ -167,6 +167,7 @@ static void __exit crc32c_mod_fini(void)
+ module_init(crc32c_mod_init);
+ module_exit(crc32c_mod_fini);
+
++MODULE_ALIAS_CRYPTO("crc32c");
+ MODULE_AUTHOR("Clay Haapala <chaapala@cisco.com>");
+ MODULE_DESCRIPTION("CRC32c (Castagnoli) calculations wrapper for lib/crc32c");
+ MODULE_LICENSE("GPL");
diff --git a/pkgs/os-specific/linux/kernel/patches.nix b/pkgs/os-specific/linux/kernel/patches.nix
index 6c8047ab1d4c..14c25374b3f0 100644
--- a/pkgs/os-specific/linux/kernel/patches.nix
+++ b/pkgs/os-specific/linux/kernel/patches.nix
@@ -82,4 +82,9 @@ rec {
     { name = "grsec-fix-path";
       patch = ./grsec-path.patch;
     };
+
+  crc_regression =
+    { name = "crc-backport-regression";
+      patch = ./crc-regression.patch;
+    };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7ed94373a12b..80ad6e13576c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8623,7 +8623,7 @@ let
 
   linux_3_10 = makeOverridable (import ../os-specific/linux/kernel/linux-3.10.nix) {
     inherit fetchurl stdenv perl buildLinux;
-    kernelPatches = [ kernelPatches.bridge_stp_helper ]
+    kernelPatches = [ kernelPatches.bridge_stp_helper kernelPatches.crc_regression ]
       ++ lib.optionals ((platform.kernelArch or null) == "mips")
       [ kernelPatches.mips_fpureg_emu
         kernelPatches.mips_fpu_sigill
@@ -8633,7 +8633,7 @@ let
 
   linux_3_12 = makeOverridable (import ../os-specific/linux/kernel/linux-3.12.nix) {
     inherit fetchurl stdenv perl buildLinux;
-    kernelPatches = [ kernelPatches.bridge_stp_helper ]
+    kernelPatches = [ kernelPatches.bridge_stp_helper kernelPatches.crc_regression ]
       ++ lib.optionals ((platform.kernelArch or null) == "mips")
       [ kernelPatches.mips_fpureg_emu
         kernelPatches.mips_fpu_sigill
@@ -8643,7 +8643,7 @@ let
 
   linux_3_14 = makeOverridable (import ../os-specific/linux/kernel/linux-3.14.nix) {
     inherit fetchurl stdenv perl buildLinux;
-    kernelPatches = [ kernelPatches.bridge_stp_helper ]
+    kernelPatches = [ kernelPatches.bridge_stp_helper kernelPatches.crc_regression ]
       ++ lib.optionals ((platform.kernelArch or null) == "mips")
       [ kernelPatches.mips_fpureg_emu
         kernelPatches.mips_fpu_sigill