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Inherit P2_PROTMAX_{ENABLE,DISABLE} across fork().

Browse source 
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
This commit is contained in:
Mark Johnston 2019-07-10 19:57:48 +00:00
parent 6325d2df9e
commit 2ffee5c1b2
1 changed files with 2 additions and 1 deletions
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3
sys/kern/kern_fork.c
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@ -465,7 +465,8 @@ do_fork(struct thread *td, struct fork_req *fr, struct proc *p2, struct thread *
*/
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);