device-mapper-multipath/SOURCES/0031-libmultipath-cleanup-invalid-config-handling.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Benjamin Marzinski <bmarzins@redhat.com>
Date: Mon, 4 Oct 2021 16:52:55 -0500
Subject: [PATCH] libmultipath: cleanup invalid config handling

Add error reporting to the remaining config handlers. If the value is
invalid, do not change the existing config option's value. Also print
an error whenever 0 is returned for an invalid value. When the handler
returns 1, config processing already fails with an error message.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
---
 libmultipath/dict.c | 73 +++++++++++++++++++++++++++++++--------------
 1 file changed, 51 insertions(+), 22 deletions(-)

diff --git a/libmultipath/dict.c b/libmultipath/dict.c
index 68647061..c534d703 100644
--- a/libmultipath/dict.c
+++ b/libmultipath/dict.c
@@ -199,8 +199,11 @@ set_yes_no(vector strvec, void *ptr, const char *file, int line_nr)
 
 	if (strcmp(buff, "yes") == 0 || strcmp(buff, "1") == 0)
 		*int_ptr = YN_YES;
-	else
+	else if (strcmp(buff, "no") == 0 || strcmp(buff, "0") == 0)
 		*int_ptr = YN_NO;
+	else
+		condlog(1, "%s line %d, invalid value for %s: \"%s\"",
+			file, line_nr, (char*)VECTOR_SLOT(strvec, 0), buff);
 
 	FREE(buff);
 	return 0;
@@ -221,7 +224,8 @@ set_yes_no_undef(vector strvec, void *ptr, const char *file, int line_nr)
 	else if (strcmp(buff, "yes") == 0 || strcmp(buff, "1") == 0)
 		*int_ptr = YNU_YES;
 	else
-		*int_ptr = YNU_UNDEF;
+		condlog(1, "%s line %d, invalid value for %s: \"%s\"",
+			file, line_nr, (char*)VECTOR_SLOT(strvec, 0), buff);
 
 	FREE(buff);
 	return 0;
@@ -480,9 +484,6 @@ def_find_multipaths_handler(struct config *conf, vector strvec,
 	char *buff;
 	int i;
 
-	if (set_yes_no_undef(strvec, &conf->find_multipaths, file, line_nr) == 0 && conf->find_multipaths != FIND_MULTIPATHS_UNDEF)
-		return 0;
-
 	buff = set_value(strvec);
 	if (!buff)
 		return 1;
@@ -495,9 +496,14 @@ def_find_multipaths_handler(struct config *conf, vector strvec,
 		}
 	}
 
-	if (conf->find_multipaths == YNU_UNDEF) {
-		condlog(0, "illegal value for find_multipaths: %s", buff);
-		conf->find_multipaths = DEFAULT_FIND_MULTIPATHS;
+	if (i >= __FIND_MULTIPATHS_LAST) {
+		if (strcmp(buff, "no") == 0 || strcmp(buff, "0") == 0)
+			conf->find_multipaths = FIND_MULTIPATHS_OFF;
+		else if (strcmp(buff, "yes") == 0 || strcmp(buff, "1") == 0)
+			conf->find_multipaths = FIND_MULTIPATHS_ON;
+		else
+			condlog(1, "%s line %d, invalid value for find_multipaths: \"%s\"",
+				file, line_nr, buff);
 	}
 
 	FREE(buff);
@@ -546,8 +552,10 @@ static int uid_attrs_handler(struct config *conf, vector strvec,
 	if (!val)
 		return 1;
 	if (parse_uid_attrs(val, conf))
-		condlog(1, "error parsing uid_attrs: \"%s\"", val);
-	condlog(3, "parsed %d uid_attrs", VECTOR_SIZE(&conf->uid_attrs));
+		condlog(1, "%s line %d,error parsing uid_attrs: \"%s\"", file,
+			line_nr, val);
+	else
+		condlog(4, "parsed %d uid_attrs", VECTOR_SIZE(&conf->uid_attrs));
 	FREE(val);
 	return 0;
 }
@@ -775,8 +783,11 @@ def_config_dir_handler(struct config *conf, vector strvec, const char *file,
 		       int line_nr)
 {
 	/* this is only valid in the main config file */
-	if (conf->processed_main_config)
+	if (conf->processed_main_config) {
+		condlog(1, "%s line %d, config_dir option only valid in /etc/multipath.conf",
+			file, line_nr);
 		return 0;
+	}
 	condlog(2, "%s line %d, \"config_dir\" is deprecated and will be disabled in a future release",
 		file, line_nr);
 	return set_path(strvec, &conf->config_dir, file, line_nr);
@@ -836,7 +847,9 @@ set_mode(vector strvec, void *ptr, int *flags, const char *file, int line_nr)
 	if (sscanf(buff, "%o", &mode) == 1 && mode <= 0777) {
 		*flags |= (1 << ATTR_MODE);
 		*mode_ptr = mode;
-	}
+	} else
+		condlog(1, "%s line %d, invalid value for mode: \"%s\"",
+			file, line_nr, buff);
 
 	FREE(buff);
 	return 0;
@@ -861,7 +874,9 @@ set_uid(vector strvec, void *ptr, int *flags, const char *file, int line_nr)
 	else if (sscanf(buff, "%u", &uid) == 1){
 		*flags |= (1 << ATTR_UID);
 		*uid_ptr = uid;
-	}
+	} else
+		condlog(1, "%s line %d, invalid value for uid: \"%s\"",
+			file, line_nr, buff);
 
 	FREE(buff);
 	return 0;
@@ -887,7 +902,9 @@ set_gid(vector strvec, void *ptr, int *flags, const char *file, int line_nr)
 	else if (sscanf(buff, "%u", &gid) == 1){
 		*flags |= (1 << ATTR_GID);
 		*gid_ptr = gid;
-	}
+	} else
+		condlog(1, "%s line %d, invalid value for gid: \"%s\"",
+			file, line_nr, buff);
 	FREE(buff);
 	return 0;
 }
@@ -989,7 +1006,8 @@ set_dev_loss(vector strvec, void *ptr, const char *file, int line_nr)
 	if (!strcmp(buff, "infinity"))
 		*uint_ptr = MAX_DEV_LOSS_TMO;
 	else if (sscanf(buff, "%u", uint_ptr) != 1)
-		*uint_ptr = DEV_LOSS_TMO_UNSET;
+		condlog(1, "%s line %d, invalid value for dev_loss_tmo: \"%s\"",
+			file, line_nr, buff);
 
 	FREE(buff);
 	return 0;
@@ -1023,13 +1041,19 @@ static int
 set_pgpolicy(vector strvec, void *ptr, const char *file, int line_nr)
 {
 	char * buff;
+	int policy;
 	int *int_ptr = (int *)ptr;
 
 	buff = set_value(strvec);
 	if (!buff)
 		return 1;
 
-	*int_ptr = get_pgpolicy_id(buff);
+	policy = get_pgpolicy_id(buff);
+	if (policy != IOPOLICY_UNDEF)
+		*int_ptr = policy;
+	else
+		condlog(1, "%s line %d, invalid value for path_grouping_policy: \"%s\"",
+			file, line_nr, buff);
 	FREE(buff);
 
 	return 0;
@@ -1142,10 +1166,11 @@ set_rr_weight(vector strvec, void *ptr, const char *file, int line_nr)
 
 	if (!strcmp(buff, "priorities"))
 		*int_ptr = RR_WEIGHT_PRIO;
-
-	if (!strcmp(buff, "uniform"))
+	else if (!strcmp(buff, "uniform"))
 		*int_ptr = RR_WEIGHT_NONE;
-
+	else
+		condlog(1, "%s line %d, invalid value for rr_weight: \"%s\"",
+			file, line_nr, buff);
 	FREE(buff);
 
 	return 0;
@@ -1281,10 +1306,13 @@ def_log_checker_err_handler(struct config *conf, vector strvec,
 	if (!buff)
 		return 1;
 
-	if (strlen(buff) == 4 && !strcmp(buff, "once"))
+	if (!strcmp(buff, "once"))
 		conf->log_checker_err = LOG_CHKR_ERR_ONCE;
-	else if (strlen(buff) == 6 && !strcmp(buff, "always"))
+	else if (!strcmp(buff, "always"))
 		conf->log_checker_err = LOG_CHKR_ERR_ALWAYS;
+	else
+		condlog(1, "%s line %d, invalid value for log_checker_err: \"%s\"",
+			file, line_nr, buff);
 
 	free(buff);
 	return 0;
@@ -1545,7 +1573,8 @@ hw_vpd_vendor_handler(struct config *conf, vector strvec, const char *file,
 			goto out;
 		}
 	}
-	hwe->vpd_vendor_id = 0;
+	condlog(1, "%s line %d, invalid value for vpd_vendor: \"%s\"",
+		file, line_nr, buff);
 out:
 	FREE(buff);
 	return 0;