Daniel Borkmann d269176e76 bpf, ppc64: fix out of bounds access in tail call ... While working on 16338a9b3a ("bpf, arm64: fix out of bounds access in tail call") I noticed that ppc64 JIT is partially affected as well. While the bound checking is correctly performed as unsigned comparison, the register with the index value however, is never truncated into 32 bit space, so e.g. a index value of 0x100000000ULL with a map of 1 element would pass with PPC_CMPLW() whereas we later on continue with the full 64 bit register value. Therefore, as we do in interpreter and other JITs truncate the value to 32 bit initially in order to fix access. Fixes: ce0761419f ("powerpc/bpf: Implement support for tail calls") Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Reviewed-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Tested-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2018-02-26 19:58:09 -08:00
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bpf_jit32.h	powerpc/bpf/jit: Isolate classic BPF JIT specifics into a separate header	2016-06-24 15:15:51 +10:00
bpf_jit64.h	bpf: take advantage of stack_depth tracking in powerpc JIT	2017-11-06 16:48:16 +11:00
bpf_jit_asm64.S	powerpc/ebpf/jit: Implement JIT compiler for extended BPF	2016-06-24 15:17:57 +10:00
bpf_jit_asm.S	powerpc/bpf/jit: Isolate classic BPF JIT specifics into a separate header	2016-06-24 15:15:51 +10:00
bpf_jit_comp64.c	bpf, ppc64: fix out of bounds access in tail call	2018-02-26 19:58:09 -08:00
bpf_jit_comp.c	bpf: get rid of pure_initcall dependency to enable jits	2018-01-19 18:37:00 -08:00
bpf_jit.h	bpf, ppc64: implement jiting of BPF_J{LT, LE, SLT, SLE}	2017-08-09 16:53:57 -07:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00