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| author | Arnd Bergmann <arnd@arndb.de> | 2019-01-10 17:24:31 +0100 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2019-01-11 11:23:58 -0800 |
| commit | 5a9372f751b5350e0ce3d2ee91832f1feae2c2e5 (patch) | |
| tree | b405c318cc8d8654857045a255cac16b48964515 /arch | |
| parent | a214720cbf50cd8c3f76bbb9c3f5c283910e9d33 (diff) | |
| download | lwn-5a9372f751b5350e0ce3d2ee91832f1feae2c2e5.tar.gz lwn-5a9372f751b5350e0ce3d2ee91832f1feae2c2e5.zip | |
mips: fix n32 compat_ipc_parse_version
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+
Diffstat (limited to 'arch')
| -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 787290781b8c..0d14f51d0002 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -3155,6 +3155,7 @@ 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 |