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| author | Arnd Bergmann <arnd@arndb.de> | 2019-01-10 17:24:31 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-01-22 21:40:33 +0100 |
| commit | 8f469dc0e6dcc4189972a2dbe0a3aeeb3eb8c9c2 (patch) | |
| tree | 18182a763f29476401b3769286608687985121a7 | |
| parent | 9d37f4a046c27c7c86598f128bbc470d17befc20 (diff) | |
| download | linux-stable-8f469dc0e6dcc4189972a2dbe0a3aeeb3eb8c9c2.tar.gz linux-stable-8f469dc0e6dcc4189972a2dbe0a3aeeb3eb8c9c2.tar.bz2 linux-stable-8f469dc0e6dcc4189972a2dbe0a3aeeb3eb8c9c2.zip | |
mips: fix n32 compat_ipc_parse_version
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>
| -rw-r--r-- | arch/mips/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 35511999156a..154b811d5894 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -3149,6 +3149,7 @@ 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 |