PR_SET_MDWE

(2const)

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

System callsmanpages-dev 6.9.1-1

#include <linux/prctl.h> /* Definition of PR_* constants */ #include <sys/prctl.h> int prctl(PR_SET_MDWE, unsigned long mask, 0L, 0L, 0L);

LIBRARY

Standard C library (libc, -lc)

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)