Changeset 55a81a31 in mainline for uspace/app/blkdump/blkdump.c

Timestamp:

2025-04-22T10:07:30Z (33 hours ago)

Author:

Miroslav Cimerman <mc@…>

Children:

2008c4a

Parents:

0639afc

Message:

uspace/app/blkdump: fix argv null deref

File:

• uspace/app/blkdump/blkdump.c (modified) (3 diffs)

uspace/app/blkdump/blkdump.c

@@ -95 +95 @@
         }
 
-        if (str_cmp(*argv, "--offset") == 0) {
+        if (*argv && str_cmp(*argv, "--offset") == 0) {
                 --argc;
                 ++argv;
@@ -115 +115 @@
         }
 
-        if (str_cmp(*argv, "--count") == 0) {
+        if (*argv && str_cmp(*argv, "--count") == 0) {
                 --argc;
                 ++argv;
@@ -136 +136 @@
 
 devname:
+        if (*argv == NULL) {
+                printf(NAME ": Error, argument missing (device_name).\n");
+                syntax_print();
+                return 1;
+        }
+
         if (argc != 1) {
                 printf(NAME ": Error, unexpected argument.\n");