[dm-devel] [PATCH] Fix segfault when fast_io_fail_tmo is empty in config file.

[Jose Castillo]

If the option "fast_io_fail_tmo" is specified in multipath.conf, without a value, the command 'multipathd reconfigure' segfaults.
With the patch included here, multipathd returns "error parsing config file" and does not segfaults.

Signed-off-by: Jose Castillo <jcastillo at redhat.com>
---
 libmultipath/dict.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libmultipath/dict.c b/libmultipath/dict.c
index 9db4725..91d9b83 100644
--- a/libmultipath/dict.c
+++ b/libmultipath/dict.c
@@ -43,6 +43,9 @@ def_fast_io_fail_handler(vector strvec)
 	char * buff;
 
 	buff = set_value(strvec);
+	if (!buff)
+		return 1;
+
 	if (strlen(buff) == 3 && !strcmp(buff, "off"))
 		conf->fast_io_fail = MP_FAST_IO_FAIL_OFF;
 	else if (sscanf(buff, "%d", &conf->fast_io_fail) != 1 ||
-- 
1.9.0