[Bug 94791] New: syscall fanotify_mark overflow.

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https://bugzilla.kernel.org/show_bug.cgi?id=94791

            Bug ID: 94791
           Summary: syscall fanotify_mark overflow.
           Product: File System
           Version: 2.5
    Kernel Version: 4.x
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: ext4
          Assignee: fs_ext4@kernel-bugs.osdl.org
          Reporter: du.guowei2@zte.com.cn
        Regression: No

file:
     fanotify_usr.c:
     syscall function fanotify_mark,below code will overflow on 32-bit system.

/* we only use the lower 32 bits as of right now. */
if ( mask & ((__u64)0xffffffff << 32))
        return -EINVAL;


include/linux/syscalls.h:
 asmlinkage long sys_fanotify_mark(int fanotify_fd, unsigned int flags, u64
mask, int fd, const char __usr *pathname);


u64 mask ,should convert to unsigned int mask???

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