Author: kib
Date: Fri Aug 22 07:52:47 2014
New Revision: 270320
URL: http://svnweb.freebsd.org/changeset/base/270320
Log:
Check the validity of struct sigaction sa_flags value, reject unknown
flags.
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Modified:
head/sys/kern/kern_sig.c
Modified: head/sys/kern/kern_sig.c
==============================================================================
--- head/sys/kern/kern_sig.c Fri Aug 22 07:09:54 2014 (r270319)
+++ head/sys/kern/kern_sig.c Fri Aug 22 07:52:47 2014 (r270320)
@@ -639,6 +639,10 @@ kern_sigaction(td, sig, act, oact, flags
if (!_SIG_VALID(sig))
return (EINVAL);
+ if (act != NULL && (act->sa_flags & ~(SA_ONSTACK | SA_RESTART |
+ SA_RESETHAND | SA_NOCLDSTOP | SA_NODEFER | SA_NOCLDWAIT |
+ SA_SIGINFO)) != 0)
+ return (EINVAL);
PROC_LOCK(p);
ps = p->p_sigacts;
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