Aurelien Jarno 15c2ac78cb MIPS: scall64-o32: Fix indirect syscall number load ... commit 79b4a9cf0e2ea8203ce777c8d5cfa86c71eae86e upstream. Commit 4c21b8fd8f (MIPS: seccomp: Handle indirect system calls (o32)) added indirect syscall detection for O32 processes running on MIPS64, but it did not work correctly for big endian kernel/processes. The reason is that the syscall number is loaded from ARG1 using the lw instruction while this is a 64-bit value, so zero is loaded instead of the syscall number. Fix the code by using the ld instruction instead. When running a 32-bit processes on a 64 bit CPU, the values are properly sign-extended, so it ensures the value passed to syscall_trace_enter is correct. Recent systemd versions with seccomp enabled whitelist the getpid syscall for their internal processes (e.g. systemd-journald), but call it through syscall(SYS_getpid). This fix therefore allows O32 big endian systems with a 64-bit kernel to run recent systemd versions. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Cc: <stable@vger.kernel.org> # v3.15+ Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: James Hogan <jhogan@kernel.org> Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-05-16 19:44:43 +02:00
..
alchemy
ar7
ath25
ath79
bcm47xx
bcm63xx
bmips
boot	MIPS: Align kernel load address to 64KB	2019-01-13 10:05:31 +01:00
cavium-octeon	MIPS: OCTEON: fix out of bounds array access on CN68XX	2018-11-21 09:27:36 +01:00
cobalt
configs	MIPS: ath79: Enable OF serial ports in the default config	2019-03-23 08:44:16 +01:00
dec
emma
fw
include	MIPS: Fix kernel crash for R6 in jump label branch function	2019-04-03 06:23:14 +02:00
jazz	MIPS: jazz: fix 64bit build	2019-03-23 08:44:16 +01:00
jz4740
kernel	MIPS: scall64-o32: Fix indirect syscall number load	2019-05-16 19:44:43 +02:00
kvm
lantiq
lasat
lib
loongson32
loongson64	mips: loongson64: lemote-2f: Add IRQF_NO_SUSPEND to "cascade" irqaction.	2019-04-03 06:23:14 +02:00
math-emu
mm	mm: replace get_user_pages_unlocked() write/force parameters with gup_flags	2018-12-17 21:55:16 +01:00
mti-malta
mti-sead3
net
netlogic
oprofile
paravirt
pci	MIPS: OCTEON: don't set octeon_dma_bar_type if PCI is disabled	2019-02-20 10:13:18 +01:00
pistachio
pmcs-msp71xx
pnx833x
power
ralink	MIPS: ralink: Fix mt7620 nd_sd pinmux	2018-12-13 09:21:30 +01:00
rb532
sgi-ip22
sgi-ip27
sgi-ip32
sibyte	MIPS: SiByte: Enable swiotlb for SWARM, LittleSur and BigSur	2019-01-26 09:42:53 +01:00
sni
txx9
vdso	MIPS: VDSO: Include $(ccflags-vdso) in o32,n32 .lds builds	2019-02-20 10:13:19 +01:00
vr41xx
xilfpga
Kbuild
Kbuild.platforms
Kconfig	MIPS: SiByte: Enable swiotlb for SWARM, LittleSur and BigSur	2019-01-26 09:42:53 +01:00
Kconfig.debug
Makefile