glibc/SOURCES/glibc-rh1810142-3.patch

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2021-04-23 04:11:25 +00:00
From: Florian Weimer <fweimer@redhat.com>
Date: Tue, 21 Jan 2020 16:11:01 +0000 (+0100)
Subject: resolv: Fix file handle leak in __resolv_conf_load [BZ #25429]
X-Git-Url: https://sourceware.org/git/?p=glibc.git;a=commitdiff_plain;h=a1a20f029299dc27170912bb9233070c8403444d
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>
---
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;
}