diff options
Diffstat (limited to 'drivers/char/mem.c')
-rw-r--r-- | drivers/char/mem.c | 61 |
1 files changed, 1 insertions, 60 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c index cf56614479ef..0e7fbfcbd6e6 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -807,65 +807,6 @@ static const struct file_operations oldmem_fops = { }; #endif -static ssize_t kmsg_writev(struct kiocb *iocb, const struct iovec *iv, - unsigned long count, loff_t pos) -{ - char *buf, *line; - int i; - int level = default_message_loglevel; - int facility = 1; /* LOG_USER */ - size_t len = iov_length(iv, count); - ssize_t ret = len; - - if (len > 1024) - return -EINVAL; - buf = kmalloc(len+1, GFP_KERNEL); - if (buf == NULL) - return -ENOMEM; - - line = buf; - for (i = 0; i < count; i++) { - if (copy_from_user(line, iv[i].iov_base, iv[i].iov_len)) - goto out; - line += iv[i].iov_len; - } - - /* - * Extract and skip the syslog prefix <[0-9]*>. Coming from userspace - * the decimal value represents 32bit, the lower 3 bit are the log - * level, the rest are the log facility. - * - * If no prefix or no userspace facility is specified, we - * enforce LOG_USER, to be able to reliably distinguish - * kernel-generated messages from userspace-injected ones. - */ - line = buf; - if (line[0] == '<') { - char *endp = NULL; - - i = simple_strtoul(line+1, &endp, 10); - if (endp && endp[0] == '>') { - level = i & 7; - if (i >> 3) - facility = i >> 3; - endp++; - len -= endp - line; - line = endp; - } - } - line[len] = '\0'; - - printk_emit(facility, level, NULL, 0, "%s", line); -out: - kfree(buf); - return ret; -} - -static const struct file_operations kmsg_fops = { - .aio_write = kmsg_writev, - .llseek = noop_llseek, -}; - static const struct memdev { const char *name; umode_t mode; @@ -884,7 +825,7 @@ static const struct memdev { [7] = { "full", 0666, &full_fops, NULL }, [8] = { "random", 0666, &random_fops, NULL }, [9] = { "urandom", 0666, &urandom_fops, NULL }, - [11] = { "kmsg", 0, &kmsg_fops, NULL }, + [11] = { "kmsg", 0644, &kmsg_fops, NULL }, #ifdef CONFIG_CRASH_DUMP [12] = { "oldmem", 0, &oldmem_fops, NULL }, #endif |