REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4506
res_init() is called from different places in sockets library. It depends
on global _res variable containing a state.
The problem is that if __BIND_RES_TEXT macro is not defined, _res is not
initialized. Depending on compiler and build optimization this can fill the
variable with garbage that is later used by res_init().
Fix is trivial - explicitly initialize _res.
Cc: Rebecca Cran <rebe...@bsdio.com>
Cc: Michael D Kinney <michael.d.kin...@intel.com>
Cc: Jayaprakash N <n.jayaprak...@intel.com>
Signed-off-by: Kloper Dimitry <dimitry.klo...@intel.com>
---
StdLib/BsdSocketLib/res_init.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/StdLib/BsdSocketLib/res_init.c b/StdLib/BsdSocketLib/res_init.c
index 613a76a..faf2b5e 100644
--- a/StdLib/BsdSocketLib/res_init.c
+++ b/StdLib/BsdSocketLib/res_init.c
@@ -121,9 +121,11 @@ static u_int32_t net_mask __P((struct in_addr));
*/
struct __res_state _res
-# if defined(__BIND_RES_TEXT)
+#if defined(__BIND_RES_TEXT)
= { RES_TIMEOUT, } /* Motorola, et al. */
-# endif
+#endif
+ = {0}
+#endif
;
--
2.40.0.windows.1
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