svn commit: r241281 - head/sys/kern
Andriy Gapon
avg at FreeBSD.org
Sat Oct 6 19:23:45 UTC 2012
Author: avg
Date: Sat Oct 6 19:23:44 2012
New Revision: 241281
URL: http://svn.freebsd.org/changeset/base/241281
Log:
ktrace/kern_exec: check p_tracecred instead of p_cred
.. when deciding whether to continue tracing across suid/sgid exec.
Otherwise if root ktrace-d an unprivileged process and the processed
exec-ed a suid program, then tracing didn't continue across exec.
Reviewed by: bde, kib
MFC after: 22 days
Modified:
head/sys/kern/kern_exec.c
Modified: head/sys/kern/kern_exec.c
==============================================================================
--- head/sys/kern/kern_exec.c Sat Oct 6 19:19:32 2012 (r241280)
+++ head/sys/kern/kern_exec.c Sat Oct 6 19:23:44 2012 (r241281)
@@ -691,7 +691,8 @@ interpret:
setsugid(p);
#ifdef KTRACE
- if (priv_check_cred(oldcred, PRIV_DEBUG_DIFFCRED, 0))
+ if (p->p_tracecred != NULL &&
+ priv_check_cred(p->p_tracecred, PRIV_DEBUG_DIFFCRED, 0))
ktrprocexec(p, &tracecred, &tracevp);
#endif
/*
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