Daniel Borkmann c43db1a3c7 bpf, arm64: fix stack_depth tracking in combination with tail calls ...

[ upstream commit a2284d912b ]

Using dynamic stack_depth tracking in arm64 JIT is currently broken in
combination with tail calls. In prologue, we cache ctx->stack_size and
adjust SP reg for setting up function call stack, and tearing it down
again in epilogue. Problem is that when doing a tail call, the cached
ctx->stack_size might not be the same.

One way to fix the problem with minimal overhead is to re-adjust SP in
emit_bpf_tail_call() and properly adjust it to the current program's
ctx->stack_size. Tested on Cavium ThunderX ARMv8.

Fixes: f1c9eed7f4 ("bpf, arm64: take advantage of stack_depth tracking")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-01-31 14:03:50 +01:00

..

alpha

alpha/PCI: Fix noname IRQ level detection

2018-01-23 19:58:19 +01:00

arc

ARC: uaccess: dont use "l" gcc inline asm constraint modifier

2018-01-10 09:31:21 +01:00

arm

ARM: net: bpf: clarify tail_call index

2018-01-31 14:03:44 +01:00

arm64

bpf, arm64: fix stack_depth tracking in combination with tail calls

2018-01-31 14:03:50 +01:00

blackfin

pinctrl: adi2: Fix Kconfig build problem

2017-12-20 10:10:34 +01:00

c6x

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02 11:20:11 +01:00

cris

License cleanup: add SPDX license identifier to uapi header files with no license

2017-11-02 11:19:54 +01:00

frv

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02 11:20:11 +01:00

h8300

License cleanup: add SPDX license identifier to uapi header files with no license

2017-11-02 11:19:54 +01:00

hexagon

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02 11:20:11 +01:00

ia64

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-11-05 12:14:50 -08:00

m32r

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02 11:20:11 +01:00

m68k

m68k: fix ColdFire node shift size calculation

2017-12-10 13:40:39 +01:00

metag

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02 11:20:11 +01:00

microblaze

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02 11:20:11 +01:00

mips

MIPS: AR7: ensure the port type's FCR value is used

2018-01-23 19:58:21 +01:00

mn10300

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02 11:20:11 +01:00

nios2

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02 11:20:11 +01:00

openrisc

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02 11:20:11 +01:00

parisc

parisc: qemu idle sleep support

2018-01-10 09:31:22 +01:00

powerpc

powerpc/powernv: Check device-tree for RFI flush settings

2018-01-23 19:58:11 +01:00

s390

KVM: s390: add proper locking for CMMA migration bitmap

2018-01-31 14:03:42 +01:00

score

License cleanup: add SPDX license identifier to uapi header files with no license

2017-11-02 11:19:54 +01:00

sh

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02 11:20:11 +01:00

sparc

sparc64: repair calling incorrect hweight function from stubs

2018-01-02 20:31:13 +01:00

tile

fcntl: don't cap l_start and l_end values for F_GETLK64 in compat syscall

2017-12-17 15:07:59 +01:00

um

arch, mm: Allow arch_dup_mmap() to fail

2017-12-29 17:53:43 +01:00

unicore32

arch, mm: Allow arch_dup_mmap() to fail

2017-12-29 17:53:43 +01:00

x86

x86/mm/64: Fix vmapped stack syncing on very-large-memory 4-level systems

2018-01-31 14:03:49 +01:00

xtensa

License cleanup: add SPDX license identifier to uapi header files with a license

2017-11-02 11:20:11 +01:00

.gitignore

…

Kconfig

kprobes: Use synchronize_rcu_tasks() for optprobe with CONFIG_PREEMPT=y

2017-12-10 13:40:40 +01:00