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-rw-r--r--kernel/printk/printk.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index db7a02e0524..012f3e40671 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -1561,6 +1561,11 @@ asmlinkage int vprintk_emit(int facility, int level,
case 'd': /* KERN_DEFAULT */
lflags |= LOG_PREFIX;
}
+ /*
+ * No need to check length here because vscnprintf
+ * put '\0' at the end of the string. Only valid and
+ * newly printed level is detected.
+ */
text_len -= end_of_header - text;
text = (char *)end_of_header;
}