Author: cy Date: Wed Nov 27 03:18:35 2019 New Revision: 355127 URL: https://svnweb.freebsd.org/changeset/base/355127
Log: MFC rr354733: Disable ntpd stack gap. When ASLR with STACK GAP != 0 ntpd suffers SIGSEGV. PR: 241421, 241960 Reported by: Vladimir Zakharov <zakharov...@gmail.com>, dewa...@heuristicsystems.com.au Reviewed by: kib, imp (previous version), ian (suggestion) Differential Revision: https://reviews.freebsd.org/D22358 Modified: stable/12/contrib/ntp/ntpd/ntpd.c Directory Properties: stable/12/ (props changed) Modified: stable/12/contrib/ntp/ntpd/ntpd.c ============================================================================== --- stable/12/contrib/ntp/ntpd/ntpd.c Wed Nov 27 01:54:39 2019 (r355126) +++ stable/12/contrib/ntp/ntpd/ntpd.c Wed Nov 27 03:18:35 2019 (r355127) @@ -138,6 +138,17 @@ # include <seccomp.h> #endif /* LIBSECCOMP and KERN_SECCOMP */ +#ifdef __FreeBSD__ +#include <sys/procctl.h> +#ifndef PROC_STACKGAP_CTL +/* + * Even if we compile on an older system we can still run on a newer one. + */ +#define PROC_STACKGAP_CTL 17 +#define PROC_STACKGAP_DISABLE 0x0002 +#endif +#endif + #ifdef HAVE_DNSREGISTRATION # include <dns_sd.h> DNSServiceRef mdns; @@ -402,6 +413,18 @@ main( char *argv[] ) { +#ifdef __FreeBSD__ + { + /* + * We Must disable ASLR stack gap on FreeBSD to avoid a + * segfault. See PR/241421 and PR/241960. + */ + int aslr_var = PROC_STACKGAP_DISABLE; + + pid_t my_pid = getpid(); + procctl(P_PID, my_pid, PROC_STACKGAP_CTL, &aslr_var); + } +#endif return ntpdmain(argc, argv); } #endif /* !SYS_WINNT */ _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"