1 files changed, 73 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-phosphor/users/phosphor-user-manager/0006-Use-groupmems-instead-of-getgrnam_r-due-to-overlay.patch b/meta-openbmc-mods/meta-common/recipes-phosphor/users/phosphor-user-manager/0006-Use-groupmems-instead-of-getgrnam_r-due-to-overlay.patch
new file mode 100644
index 000000000..12a2bda3e
--- /dev/null
+++ b/meta-openbmc-mods/meta-common/recipes-phosphor/users/phosphor-user-manager/0006-Use-groupmems-instead-of-getgrnam_r-due-to-overlay.patch
@@ -0,0 +1,73 @@
+From c0bf911cbc33659adddebde767029ffc23251c61 Mon Sep 17 00:00:00 2001
+From: Richard Marian Thomaiyar <richard.marian.thomaiyar@linux.intel.com>
+Date: Mon, 24 Feb 2020 13:37:12 +0530
+Subject: [PATCH] Use groupmems instead of getgrnam_r due to overlay
+
+With JFFS2 overlay, getgrnam_r during initial time returns the
+old group details as per the lower dir, instead of the overlay one
+but at the same time groupmems where returning proper values, which
+reads the file everytime. Hence replacing getgrnam_r with groupmems
+
+Tested:
+1. Verified that when added multiple user and then doing
+BMC reset using ipmitool raw 6 2 doesn't reproduce the issue of
+user with only ssh group. (on 38 version source + this fix)
+2. Updated using redfish to version 39 + this fix, and made sure
+issue doesn't happen.
+
+Note: For testing purpose added debug statements to dump ouput of
+both getgrnam_r & groupmems and able to see proper list only
+in groupmems when the issue is reproduced
+
+Signed-off-by: Richard Marian Thomaiyar <richard.marian.thomaiyar@linux.intel.com>
+---
+ user_service.cpp | 26 +++++++++++---------------
+ 1 file changed, 11 insertions(+), 15 deletions(-)
+
+diff --git a/user_service.cpp b/user_service.cpp
+index c3c45bd..4fdf7a1 100644
+--- a/user_service.cpp
++++ b/user_service.cpp
+@@ -143,28 +143,24 @@ class ShadowService : public phosphor::user::UserServiceInterface
+         getUsersInGroup(const std::string &groupName) const override
+     {
+         std::vector<std::string> usersInGroup;
+-        // Should be more than enough to get the pwd structure.
+-        std::array<char, 4096> buffer{};
+-        struct group grp;
+-        struct group *grpPtr = &grp;
+-        struct group *resultPtr;
+-
+-        int status = getgrnam_r(groupName.c_str(), grpPtr, buffer.data(),
+-                                buffer.max_size(), &resultPtr);
+-
+-        if (!status && (grpPtr == resultPtr))
++        std::vector<std::string> output;
++        try
+         {
+-            for (; *(grp.gr_mem) != NULL; ++(grp.gr_mem))
+-            {
+-                usersInGroup.emplace_back(*(grp.gr_mem));
+-            }
++            output = phosphor::user::executeCmd("/usr/sbin/groupmems", "-l",
++                                                "-g", groupName.c_str());
+         }
+-        else
++        catch (const phosphor::user::InternalFailure &e)
+         {
+             phosphor::logging::log<phosphor::logging::level::ERR>(
+                 "Group not found",
+                 phosphor::logging::entry("GROUP=%s", groupName.c_str()));
+             // Don't throw error, just return empty usersInGroup - fallback
++            return usersInGroup;
++        }
++        if (!output.empty())
++        {
++            boost::algorithm::split(usersInGroup, output[0],
++                                    boost::algorithm::is_any_of(" "));
+         }
+         return usersInGroup;
+     }
+-- 
+2.7.4
+