1 files changed, 2 insertions, 1 deletions

diff --git a/fs/locks.c b/fs/locks.c
index 5eb259e3cd38..20457486d6b2 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1580,7 +1580,8 @@ asmlinkage long sys_flock(unsigned int fd, unsigned int cmd)
         cmd &= ~LOCK_NB;
         unlock = (cmd == LOCK_UN);
 
-        if (!unlock && !(cmd & LOCK_MAND) && !(filp->f_mode & 3))
+        if (!unlock && !(cmd & LOCK_MAND) &&
+            !(filp->f_mode & (FMODE_READ|FMODE_WRITE)))
                 goto out_putf;
 
         error = flock_make_lock(filp, &lock, cmd);