leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
a2284d912b
linux/arch
History
Daniel Borkmann a2284d912b bpf, arm64: fix stack_depth tracking in combination with tail calls 
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>
2018-01-16 11:29:15 -08:00
..
alpha bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
arc ARC fixes for 4.15-rc7 2018-01-05 16:06:35 -08:00
arm kernel/exit.c: export abort() to modules 2018-01-04 16:45:09 -08:00
arm64 bpf, arm64: fix stack_depth tracking in combination with tail calls 2018-01-16 11:29:15 -08:00
blackfin bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
c6x bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
cris bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
frv bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
h8300 bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
hexagon bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
ia64 bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
m32r kernel/exit.c: export abort() to modules 2018-01-04 16:45:09 -08:00
m68k Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-12-08 13:32:44 -08:00
metag bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
microblaze bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
mips MIPS: Validate PR_SET_FP_MODE prctl(2) requests against the ABI of the task 2017-12-20 11:55:43 +01:00
mn10300 bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
nios2 bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
openrisc bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
parisc parisc: qemu idle sleep support 2018-01-06 12:28:04 +01:00
powerpc powerpc fixes for 4.15 #6 2018-01-06 09:48:27 -08:00
riscv riscv: rename SR_* constants to match the spec 2018-01-07 15:14:39 -08:00
s390 KVM fixes for v4.15-rc7 2018-01-06 17:05:05 -08:00
score bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
sh SolutionEngine771x: add Ether TSU resource 2018-01-09 12:21:14 -05:00
sparc sparc64: repair calling incorrect hweight function from stubs 2017-12-27 20:29:48 -05:00
tile bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
um Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-12-23 11:53:04 -08:00
unicore32 kernel/exit.c: export abort() to modules 2018-01-04 16:45:09 -08:00
x86 KVM fixes for v4.15-rc7 2018-01-06 17:05:05 -08:00
xtensa bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type 2017-12-05 15:02:40 +01:00
.gitignore
Kconfig bpf: Revert bpf_overrid_function() helper changes. 2017-11-11 18:24:55 +09:00