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From: Hsuan-Chi Kuo <hsuanchikuo@gmail.com>
To: keescook@chromium.org
Cc: hsuanchikuo@gmail.com, Andy Lutomirski <luto@amacapital.net>,
	Will Drewry <wad@chromium.org>,
	linux-kernel@vger.kernel.org
Subject: [PATCH] seccomp: Fix resetting filter count at seccomp_sync_threads()
Date: Thu,  4 Mar 2021 17:37:08 -0600	[thread overview]
Message-ID: <20210304233708.420597-1-hsuanchikuo@gmail.com> (raw)

The desired behavior is to set the caller's filter count to thread's.

Signed-off-by: Hsuan-Chi Kuo <hsuanchikuo@gmail.com>
---
 kernel/seccomp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index 1d60fc2c99..3dde1aa173 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -597,7 +597,7 @@ static inline void seccomp_sync_threads(unsigned long flags)
 		smp_store_release(&thread->seccomp.filter,
 				  caller->seccomp.filter);
 		atomic_set(&thread->seccomp.filter_count,
-			   atomic_read(&thread->seccomp.filter_count));
+			   atomic_read(&caller->seccomp.filter_count));
 
 		/*
 		 * Don't let an unprivileged task work around
-- 
2.30.1


             reply	other threads:[~2021-03-04 23:35 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-04 23:37 Hsuan-Chi Kuo [this message]
2021-08-11 19:00 ` [PATCH] seccomp: Fix resetting filter count at seccomp_sync_threads() Kees Cook

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