Author: markj
Date: Wed Jul 10 19:57:48 2019
New Revision: 349892
URL: https://svnweb.freebsd.org/changeset/base/349892
Log:
Inherit P2_PROTMAX_{ENABLE,DISABLE} across fork().
Thus, when using proccontrol(1) to disable implicit application of
PROT_MAX within a process, child processes will inherit this setting.
Discussed with: kib
MFC with: r349609
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/kern/kern_fork.c
Modified: head/sys/kern/kern_fork.c
==============================================================================
--- head/sys/kern/kern_fork.c Wed Jul 10 19:32:50 2019 (r349891)
+++ head/sys/kern/kern_fork.c Wed Jul 10 19:57:48 2019 (r349892)
@@ -465,7 +465,8 @@ do_fork(struct thread *td, struct fork_req *fr, struct
*/
p2->p_flag = P_INMEM;
p2->p_flag2 = p1->p_flag2 & (P2_ASLR_DISABLE | P2_ASLR_ENABLE |
- P2_ASLR_IGNSTART | P2_NOTRACE | P2_NOTRACE_EXEC | P2_TRAPCAP);
+ P2_ASLR_IGNSTART | P2_NOTRACE | P2_NOTRACE_EXEC |
+ P2_PROTMAX_ENABLE | P2_PROTMAX_DISABLE | P2_TRAPCAP);
p2->p_swtick = ticks;
if (p1->p_flag & P_PROFIL)
startprofclock(p2);
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