linux-kernel - [PATCH 5.5 104/257] seccomp: Add missing compat

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Message-Id: <20200416131339.134491351@linuxfoundation.org>
Date:   Thu, 16 Apr 2020 15:22:35 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Sven Schnelle <svens@...ux.ibm.com>,
        Kees Cook <keescook@...omium.org>
Subject: [PATCH 5.5 104/257] seccomp: Add missing compat_ioctl for notify

From: Sven Schnelle <svens@...ux.ibm.com>

commit 3db81afd99494a33f1c3839103f0429c8f30cb9d upstream.

Executing the seccomp_bpf testsuite under a 64-bit kernel with 32-bit
userland (both s390 and x86) doesn't work because there's no compat_ioctl
handler defined. Add the handler.

Signed-off-by: Sven Schnelle <svens@...ux.ibm.com>
Fixes: 6a21cc50f0c7 ("seccomp: add a return code to trap to userspace")
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/r/20200310123332.42255-1-svens@linux.ibm.com
Signed-off-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 kernel/seccomp.c |    1 +
 1 file changed, 1 insertion(+)

--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -1221,6 +1221,7 @@ static const struct file_operations secc
 	.poll = seccomp_notify_poll,
 	.release = seccomp_notify_release,
 	.unlocked_ioctl = seccomp_notify_ioctl,
+	.compat_ioctl = seccomp_notify_ioctl,
 };
 
 static struct file *init_listener(struct seccomp_filter *filter)