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authorFlorian Weimer <fweimer@redhat.com>2020-01-21 17:11:01 +0100
committerFlorian Weimer <fweimer@redhat.com>2020-02-14 08:13:58 +0100
commita1a20f029299dc27170912bb9233070c8403444d (patch)
tree58caad17547053524bee65848c564ea1c0fc8f81 /resolv/res_init.c
parent9642b85fd0dfa5731020a3271c08e33e1dc05c85 (diff)
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resolv: Fix file handle leak in __resolv_conf_load [BZ #25429]
res_vinit_1 did not close the stream on errors, only on success.
This change moves closing the stream to __resolv_conf_load, for both
the success and error cases.

Fixes commit 89f187a40fc0ad4e22838526bfe34d73f758b776 ("resolv: Use
getline for configuration file reading in res_vinit_1") and commit
3f853f22c87f0b671c0366eb290919719fa56c0e ("resolv: Lift domain search
list limits [BZ #19569] [BZ #21475]"), where memory allocation was
introduced into res_vinit_1.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'resolv/res_init.c')
-rw-r--r--resolv/res_init.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/resolv/res_init.c b/resolv/res_init.c
index 95dce098aa..09345718cd 100644
--- a/resolv/res_init.c
+++ b/resolv/res_init.c
@@ -508,7 +508,6 @@ res_vinit_1 (FILE *fp, struct resolv_conf_parser *parser)
               continue;
             }
         }
-      fclose (fp);
     }
   if (__glibc_unlikely (nameserver_list_size (&parser->nameserver_list) == 0))
     {
@@ -593,6 +592,13 @@ __resolv_conf_load (struct __res_state *preinit)
     }
   resolv_conf_parser_free (&parser);
 
+  if (fp != NULL)
+    {
+      int saved_errno = errno;
+      fclose (fp);
+      __set_errno (saved_errno);
+    }
+
   return conf;
 }