diff options
| author | Artur Grabowski <art@cvs.openbsd.org> | 2002-01-20 11:27:53 +0000 |
|---|---|---|
| committer | Artur Grabowski <art@cvs.openbsd.org> | 2002-01-20 11:27:53 +0000 |
| commit | b1debdf727116f16170aa85959010013dd34583e (patch) | |
| tree | b2f6cee252eb75c2e5b8874177dcccb398a63941 /sys/miscfs | |
| parent | 5553da18201980ea91c0445a3120d60334ec5ae5 (diff) | |
When a process is exec:ing mark it with a flag. Check that flag in ptrace
and procfs (and possibly more places in the future) and simply refuse to
fiddle with the execing process. This is an ugly hack, but this far we
haven't been successful in creating a race-free exec.
Diffstat (limited to 'sys/miscfs')
| -rw-r--r-- | sys/miscfs/procfs/procfs_mem.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/miscfs/procfs/procfs_mem.c b/sys/miscfs/procfs/procfs_mem.c index 57c121a0f9d..afa929c1f7a 100644 --- a/sys/miscfs/procfs/procfs_mem.c +++ b/sys/miscfs/procfs/procfs_mem.c @@ -1,4 +1,4 @@ -/* $OpenBSD: procfs_mem.c,v 1.15 2001/11/06 01:44:23 art Exp $ */ +/* $OpenBSD: procfs_mem.c,v 1.16 2002/01/20 11:27:52 art Exp $ */ /* $NetBSD: procfs_mem.c,v 1.8 1996/02/09 22:40:50 christos Exp $ */ /* @@ -104,6 +104,8 @@ procfs_domem(curp, p, pfs, uio) * of the entire system, and the system was not * compiled with permanently insecure mode turned * on. + * + * (3) It's currently execing. */ int procfs_checkioperm(p, t) @@ -119,6 +121,9 @@ procfs_checkioperm(p, t) if ((t->p_pid == 1) && (securelevel > -1)) return (EPERM); + if (t->p_flag & P_INEXEC) + return (EAGAIN); + return (0); } |