[PATCH] x86-64: Print type and size correctly for unknown compat ioctls

Signed-off-by: Andi Kleen <ak@suse.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/fs/compat.c b/fs/compat.c
index 040a8be38a48..72e5e6923828 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -371,13 +371,14 @@ static void compat_ioctl_error(struct file *filp, unsigned int fd,
                         fn = "?";
         }
 
-        sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
+        sprintf(buf,"'%c'", (cmd>>_IOC_TYPESHIFT) & _IOC_TYPEMASK);
         if (!isprint(buf[1]))
                 sprintf(buf, "%02x", buf[1]);
         compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
-                        "cmd(%08x){%s} arg(%08x) on %s\n",
+                        "cmd(%08x){t:%s;sz:%u} arg(%08x) on %s\n",
                         current->comm, current->pid,
                         (int)fd, (unsigned int)cmd, buf,
+                        (cmd >> _IOC_SIZESHIFT) & _IOC_SIZEMASK,
                         (unsigned int)arg, fn);
 
         if (path)