File nss-database-check-reload.patch of Package glibc

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File nss-database-check-reload.patch of Package glibc (Revision c17a2c0f60a604fdff5fdf03289c1873)

Currently displaying revision c17a2c0f60a604fdff5fdf03289c1873 , Show latest

From 17f0ff097887008b2d3dca270c8ffbb4b43a8749 Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyfox@gentoo.org>
Date: Fri, 5 Feb 2021 07:32:18 +0000
Subject: [PATCH] nsswitch: return result when nss database is locked [BZ
 #27343]

Before the change nss_database_check_reload_and_get() did not populate
the '*result' value when it returned success in a case of chroot
detection. This caused initgroups() to use garage pointer in the
following test (extracted from unbound):

```

int main() {
    // load some NSS modules
    struct passwd * pw = getpwnam("root");

chdir("/tmp");
    chroot("/tmp");
    chdir("/");
    // access nsswitch.conf in a chroot
    initgroups("root", 0);
}
```

Reviewed-by: DJ Delorie <dj@redhat.com>
---
 nss/nss_database.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: glibc-2.33/nss/nss_database.c
===================================================================
--- glibc-2.33.orig/nss/nss_database.c
+++ glibc-2.33/nss/nss_database.c
@@ -400,8 +400,9 @@ nss_database_check_reload_and_get (struc
 	  && (str.st_ino != local->root_ino
 	      ||  str.st_dev != local->root_dev)))
     {
-      /* Change detected; disable reloading.  */
+      /* Change detected; disable reloading and return current state.  */
       atomic_store_release (&local->data.reload_disabled, 1);
+      *result = local->data.services[database_index];
       __libc_lock_unlock (local->lock);
       __nss_module_disable_loading ();
       return true;

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File nss-database-check-reload.patch of Package glibc (Revision c17a2c0f60a604fdff5fdf03289c1873)

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