From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Paul Burton <paul.burton@mips.com>,
linux-mips@vger.kernel.org
Subject: [PATCH 4.4 051/104] mips: fix n32 compat_ipc_parse_version
Date: Thu, 24 Jan 2019 20:19:40 +0100 [thread overview]
Message-ID: <20190124190201.415332191@linuxfoundation.org> (raw)
In-Reply-To: <20190124190154.968308875@linuxfoundation.org>
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Arnd Bergmann <arnd@arndb.de>
commit 5a9372f751b5350e0ce3d2ee91832f1feae2c2e5 upstream.
While reading through the sysvipc implementation, I noticed that the n32
semctl/shmctl/msgctl system calls behave differently based on whether
o32 support is enabled or not: Without o32, the IPC_64 flag passed by
user space is rejected but calls without that flag get IPC_64 behavior.
As far as I can tell, this was inadvertently changed by a cleanup patch
but never noticed by anyone, possibly nobody has tried using sysvipc
on n32 after linux-3.19.
Change it back to the old behavior now.
Fixes: 78aaf956ba3a ("MIPS: Compat: Fix build error if CONFIG_MIPS32_COMPAT but no compat ABI.")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: stable@vger.kernel.org # 3.19+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/mips/Kconfig | 1 +
1 file changed, 1 insertion(+)
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2972,6 +2972,7 @@ config MIPS32_O32
config MIPS32_N32
bool "Kernel support for n32 binaries"
depends on 64BIT
+ select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
select COMPAT
select MIPS32_COMPAT
select SYSVIPC_COMPAT if SYSVIPC
next parent reply other threads:[~2019-01-24 20:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190124190154.968308875@linuxfoundation.org>
2019-01-24 19:19 ` Greg Kroah-Hartman [this message]
2019-01-24 19:19 ` [PATCH 4.4 053/104] Disable MSI also when pcie-octeon.pcie_disable on Greg Kroah-Hartman
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