[S390] dasd: use vmalloc for statistics input buffer

The size of the buffer that is used to store DASD statistics input
strings depends on the user input. If the input string is to large,
the write operation could fail with -ENOMEM. To avoid this, use
vmalloc instead of kmalloc.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
index 6c3c5364d082..e12989fff4ff 100644
--- a/drivers/s390/block/dasd_proc.c
+++ b/drivers/s390/block/dasd_proc.c
@@ -312,14 +312,14 @@ static ssize_t dasd_stats_proc_write(struct file *file,
                 pr_info("The statistics have been reset\n");
         } else
                 goto out_parse_error;
-        kfree(buffer);
+        vfree(buffer);
         return user_len;
 out_parse_error:
         rc = -EINVAL;
         pr_warning("%s is not a supported value for /proc/dasd/statistics\n",
                 str);
 out_error:
-        kfree(buffer);
+        vfree(buffer);
         return rc;
 #else
         pr_warning("/proc/dasd/statistics: is not activated in this kernel\n");