NAME

       PR_SET_MDWE - set the Memory-Deny-Write-Execute protection mask for the calling process

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <linux/prctl.h>  /* Definition of PR_* constants */
       #include <sys/prctl.h>

       int prctl(PR_SET_MDWE, unsigned long mask, 0L, 0L, 0L);

DESCRIPTION

       Set  the  calling process' Memory-Deny-Write-Execute protection mask.  Once protection bits are set, they
       can not be changed.

       mask must be a bit mask of:

       PR_MDWE_REFUSE_EXEC_GAIN
              New memory mapping protections can't be writable and executable.   Non-executable  mappings  can't
              become executable.

       PR_MDWE_NO_INHERIT  (since Linux 6.6)
              Do not propagate MDWE protection to child processes on fork(2).  Setting this bit requires setting
              PR_MDWE_REFUSE_EXEC_GAIN too.

RETURN VALUE

       On success, 0 is returned.  On error, -1 is returned, and errno is set to indicate the error.

ERRORS

       EINVAL mask is not a valid value.

STANDARDS

       Linux.

HISTORY

       Linux 6.3.

SEE ALSO

       prctl(2), PR_GET_MDWE(2const)

Linux man-pages 6.9.1                              2024-06-01                                PR_SET_MDWE(2const)