git: bfd451210e59 - main - imgact_elf: Disable the stack gap for now

The branch main has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=bfd451210e5972c1f2ec5200b6ca6ca70a9f24ae

commit bfd451210e5972c1f2ec5200b6ca6ca70a9f24ae
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2021-12-14 21:15:06 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2021-12-14 21:19:40 +0000

    imgact_elf: Disable the stack gap for now
    
    The integration with RLIMIT_STACK is still causing problems for some
    programs such as lang/sdcc and syzkaller's executor.  Until this is
    resolved by some work currently in progress, disable the stack gap by
    default.
    
    PR:             260303
    Reviewed by:    kib, emaste
    Sponsored by:   The FreeBSD Foundation
    Differential Revision:  https://reviews.freebsd.org/D33438
---
 sys/kern/imgact_elf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/kern/imgact_elf.c b/sys/kern/imgact_elf.c
index ce04e845cef5..6834b7dfd150 100644
--- a/sys/kern/imgact_elf.c
+++ b/sys/kern/imgact_elf.c
@@ -201,7 +201,7 @@ SYSCTL_INT(ASLR_NODE_OID, OID_AUTO, honor_sbrk, CTLFLAG_RW,
     &__elfN(aslr_honor_sbrk), 0,
     __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) ": assume sbrk is used");
 
-static int __elfN(aslr_stack_gap) = 3;
+static int __elfN(aslr_stack_gap) = 0;
 SYSCTL_INT(ASLR_NODE_OID, OID_AUTO, stack_gap, CTLFLAG_RW,
     &__elfN(aslr_stack_gap), 0,
     __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE))