Thread (2 messages) 2 messages, 2 authors, 2021-10-08

[PATCH] Fix 2 dc stream buffer

STALE1822d

From: Nigel Croxon <hidden>
Date: 2021-08-11 13:39:34
Subsystem: the rest · Maintainer: Linus Torvalds

To meet requirements of Common Criteria certification vulnerablility
assessment. Static code analysis has been run and found the following
Error: DC.STREAM_BUFFER (CWE-120): [#def46]
mdadm-4.2: dont_call: "fscanf" assumes an arbitrarily
long string, so callers must use correct precision specifiers or
never use "fscanf".

The change is to define a value for string %s.

Signed-off-by: Nigel Croxon <redacted>
---
 Monitor.c | 2 +-
 policy.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/Monitor.c b/Monitor.c
index f5412299..8bd3b5a1 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -359,7 +359,7 @@ static int check_one_sharer(int scan)
 			 "/proc/%d/comm", pid);
 		comm_fp = fopen(comm_path, "r");
 		if (comm_fp) {
-			if (fscanf(comm_fp, "%s", comm) &&
+			if (fscanf(comm_fp, "%19s", comm) &&
 			    strncmp(basename(comm), Name, strlen(Name)) == 0) {
 				if (scan) {
 					pr_err("Only one autorebuild process allowed in scan mode, aborting\n");
diff --git a/policy.c b/policy.c
index 3c53bd35..e9760a65 100644
--- a/policy.c
+++ b/policy.c
@@ -784,7 +784,7 @@ int policy_check_path(struct mdinfo *disk, struct map_ent *array)
 		if (!f)
 			continue;
 
-		rv = fscanf(f, " %s %x:%x:%x:%x\n",
+		rv = fscanf(f, " %255s %x:%x:%x:%x\n",
 			    array->metadata,
 			    array->uuid,
 			    array->uuid+1,
-- 
2.29.2
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