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-rw-r--r--kernel/printk.c32
1 files changed, 20 insertions, 12 deletions
diff --git a/kernel/printk.c b/kernel/printk.c
index 50c96b5651b6..6a76ab9d4476 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -389,8 +389,10 @@ static ssize_t devkmsg_writev(struct kiocb *iocb, const struct iovec *iv,
line = buf;
for (i = 0; i < count; i++) {
- if (copy_from_user(line, iv[i].iov_base, iv[i].iov_len))
+ if (copy_from_user(line, iv[i].iov_base, iv[i].iov_len)) {
+ ret = -EFAULT;
goto out;
+ }
line += iv[i].iov_len;
}
@@ -1540,17 +1542,23 @@ asmlinkage int vprintk_emit(int facility, int level,
lflags |= LOG_NEWLINE;
}
- /* strip syslog prefix and extract log level or control flags */
- if (text[0] == '<' && text[1] && text[2] == '>') {
- switch (text[1]) {
- case '0' ... '7':
- if (level == -1)
- level = text[1] - '0';
- case 'd': /* KERN_DEFAULT */
- lflags |= LOG_PREFIX;
- case 'c': /* KERN_CONT */
- text += 3;
- text_len -= 3;
+ /* strip kernel syslog prefix and extract log level or control flags */
+ if (facility == 0) {
+ int kern_level = printk_get_level(text);
+
+ if (kern_level) {
+ const char *end_of_header = printk_skip_level(text);
+ switch (kern_level) {
+ case '0' ... '7':
+ if (level == -1)
+ level = kern_level - '0';
+ case 'd': /* KERN_DEFAULT */
+ lflags |= LOG_PREFIX;
+ case 'c': /* KERN_CONT */
+ break;
+ }
+ text_len -= end_of_header - text;
+ text = (char *)end_of_header;
}
}