diff options
| author | Konstantin Belousov <kib@FreeBSD.org> | 2015-10-20 20:22:57 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2015-10-20 20:22:57 +0000 |
| commit | 77b9bec37b1cffef0ae85a1a0452b9522023627a (patch) | |
| tree | d6ac59d637b5d3cb16e3bdaa175011387d59ef31 /sys/kern/sys_process.c | |
| parent | 16a5c008cc080c91c0f471e04e44895a0fa6ba81 (diff) | |
| download | src-77b9bec37b1cffef0ae85a1a0452b9522023627a.tar.gz src-77b9bec37b1cffef0ae85a1a0452b9522023627a.zip | |
Reviewed by: jhb, pho
Reported and tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Differential revision: https://reviews.freebsd.org/D3908
Notes
Notes:
svn path=/head/; revision=289660
Diffstat (limited to 'sys/kern/sys_process.c')
| -rw-r--r-- | sys/kern/sys_process.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/sys/kern/sys_process.c b/sys/kern/sys_process.c index 588b43c606fe..85be385f3669 100644 --- a/sys/kern/sys_process.c +++ b/sys/kern/sys_process.c @@ -744,7 +744,18 @@ kern_ptrace(struct thread *td, int req, pid_t pid, void *addr, int data) */ switch (req) { case PT_TRACE_ME: - /* Always legal. */ + /* + * Always legal, when there is a parent process which + * could trace us. Otherwise, reject. + */ + if ((p->p_flag & P_TRACED) != 0) { + error = EBUSY; + goto fail; + } + if (p->p_pptr == initproc) { + error = EPERM; + goto fail; + } break; case PT_ATTACH: |