Thanks!
On Sat, Sep 21, 2019 at 4:03 PM Konstantin Belousov <[email protected]> wrote: > > Author: kib > Date: Sat Sep 21 20:03:17 2019 > New Revision: 352585 > URL: https://svnweb.freebsd.org/changeset/base/352585 > > Log: > kern.elf{32,64}.pie_base sysctl: enforce page alignment. > > Requested by: rstone > Sponsored by: The FreeBSD Foundation > MFC after: 1 week > > Modified: > head/sys/kern/imgact_elf.c > > Modified: head/sys/kern/imgact_elf.c > ============================================================================== > --- head/sys/kern/imgact_elf.c Sat Sep 21 19:51:57 2019 (r352584) > +++ head/sys/kern/imgact_elf.c Sat Sep 21 20:03:17 2019 (r352585) > @@ -136,8 +136,24 @@ SYSCTL_INT(_kern_elf32, OID_AUTO, read_exec, CTLFLAG_R > #endif > > static u_long __elfN(pie_base) = ET_DYN_LOAD_ADDR; > -SYSCTL_ULONG(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, pie_base, > - CTLFLAG_RWTUN, &__elfN(pie_base), 0, > +static int > +sysctl_pie_base(SYSCTL_HANDLER_ARGS) > +{ > + u_long val; > + int error; > + > + val = __elfN(pie_base); > + error = sysctl_handle_long(oidp, &val, 0, req); > + if (error != 0 || req->newptr == NULL) > + return (error); > + if ((val & PAGE_MASK) != 0) > + return (EINVAL); > + __elfN(pie_base) = val; > + return (0); > +} > +SYSCTL_PROC(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, pie_base, > + CTLTYPE_ULONG | CTLFLAG_MPSAFE | CTLFLAG_RW, NULL, 0, > + sysctl_pie_base, "LU", > "PIE load base without randomization"); > > SYSCTL_NODE(__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, aslr, > CTLFLAG_RW, 0, _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
