[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <20200514161607.9212-1-daniel@iogearbox.net>
Date: Thu, 14 May 2020 18:16:04 +0200
From: Daniel Borkmann <daniel@...earbox.net>
To: ast@...nel.org
Cc: bpf@...r.kernel.org, netdev@...r.kernel.org,
torvalds@...ux-foundation.org, mhiramat@...nel.org,
brendan.d.gregg@...il.com, hch@....de, john.fastabend@...il.com,
yhs@...com, Daniel Borkmann <daniel@...earbox.net>
Subject: [PATCH bpf 0/3] Restrict bpf_probe_read{,str}() and bpf_trace_printk()'s %s
Small set of fixes in order to restrict BPF helpers for tracing which are
broken on archs with overlapping address ranges as per discussion in [0].
I've targetted this for -bpf tree so they can be routed as fixes. Thanks!
[0] https://lore.kernel.org/bpf/CAHk-=wjJKo0GVixYLmqPn-Q22WFu0xHaBSjKEo7e7Yw72y5SPQ@mail.gmail.com/T/
Daniel Borkmann (3):
bpf: restrict bpf_probe_read{,str}() only to archs where they work
bpf: add bpf_probe_read_{user, kernel}_str() to do_refine_retval_range
bpf: restrict bpf_trace_printk()'s %s usage and add %psK, %psU specifier
Documentation/core-api/printk-formats.rst | 14 ++++
arch/arm/Kconfig | 1 +
arch/arm64/Kconfig | 1 +
arch/x86/Kconfig | 1 +
init/Kconfig | 3 +
kernel/bpf/verifier.c | 4 +-
kernel/trace/bpf_trace.c | 98 +++++++++++++++--------
lib/vsprintf.c | 7 +-
8 files changed, 94 insertions(+), 35 deletions(-)
--
2.21.0
Powered by blists - more mailing lists