From bb724fa986f6be4663f0cf15949bbb8de5814ff1 Mon Sep 17 00:00:00 2001
From: Jeremy Fleischman <jeremyfleischman@gmail.com>
Date: Wed, 22 Feb 2023 19:43:02 -0800
Subject: [PATCH] sysdig: Include driver patch to fix compilation on Linux 6.2

On nixos-unstable with the latest kernel (6.2.0), I'm seeing sysdig
fail to compile:

    /build/source/build/driver/src/main.c:2788:30: error: assignment to 'char * (*)(const struct device *, umode_t *)' {aka 'char * (*)(const struct device *, short unsigned int *)'} from incompatible pointer type 'char * (*)(struct device *, umode_t *)' {aka 'char * (*)(struct device *, short unsigned int *)'} [-Werror=incompatible-pointer-types]
     2788 |         g_ppm_class->devnode = ppm_devnode;
          |                              ^
    /build/libs/userspace/libscap/scap_procs.c: In function 'scap_os_getpid_global':

This has already been fixed upstream, this just cherry-picks that fix.
---
 pkgs/os-specific/linux/sysdig/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/os-specific/linux/sysdig/default.nix b/pkgs/os-specific/linux/sysdig/default.nix
index a8579a50fb65..2e01a38a0698 100644
--- a/pkgs/os-specific/linux/sysdig/default.nix
+++ b/pkgs/os-specific/linux/sysdig/default.nix
@@ -22,6 +22,11 @@ let
     rev = "3.0.1+driver";
     sha256 = "sha256-bK9wv17bVl93rOqw7JICnMOM0fDtPIErfMmUmNKOD5c=";
   };
+  # Workaround for scap-driver compilation error on kernel 6.2: https://github.com/falcosecurity/libs/issues/918
+  driverPatch = fetchpatch {
+    url = "https://github.com/falcosecurity/libs/commit/b8ec3e8637c850066d01543616fe413e8deb9e1f.patch";
+    hash = "sha256-s7iHbOjVqHSWRY4gktZldgrU5OClqRmbqmDtUgFIeh0=";
+  };
 
 in
 stdenv.mkDerivation rec {
@@ -67,6 +72,7 @@ stdenv.mkDerivation rec {
     chmod -R +w libs
     cp -r ${driver} driver-src
     chmod -R +w driver-src
+    patch -p1 -d driver-src < ${driverPatch}
     cmakeFlagsArray+=(
       "-DFALCOSECURITY_LIBS_SOURCE_DIR=$(pwd)/libs"
       "-DVALIJSON_INCLUDE=${valijson}/include"