From: Daniel Borkmann <daniel@iogearbox.net>
To: ast@kernel.org
Cc: bpf@vger.kernel.org, netdev@vger.kernel.org,
torvalds@linux-foundation.org, mhiramat@kernel.org,
brendan.d.gregg@gmail.com, hch@lst.de, john.fastabend@gmail.com,
yhs@fb.com, Daniel Borkmann <daniel@iogearbox.net>
Subject: [PATCH bpf 0/3] Restrict bpf_probe_read{,str}() and bpf_trace_printk()'s %s
Date: Thu, 14 May 2020 18:16:04 +0200 [thread overview]
Message-ID: <20200514161607.9212-1-daniel@iogearbox.net> (raw)
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
next reply other threads:[~2020-05-14 16:18 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-14 16:16 Daniel Borkmann [this message]
2020-05-14 16:16 ` [PATCH bpf 1/3] bpf: restrict bpf_probe_read{,str}() only to archs where they work Daniel Borkmann
2020-05-14 18:57 ` Linus Torvalds
2020-05-15 0:06 ` Masami Hiramatsu
2020-05-14 16:16 ` [PATCH bpf 2/3] bpf: add bpf_probe_read_{user, kernel}_str() to do_refine_retval_range Daniel Borkmann
2020-05-14 16:22 ` John Fastabend
2020-05-14 17:41 ` Yonghong Song
2020-05-14 16:16 ` [PATCH bpf 3/3] bpf: restrict bpf_trace_printk()'s %s usage and add %psK, %psU specifier Daniel Borkmann
2020-05-14 18:10 ` Yonghong Song
2020-05-14 21:05 ` Daniel Borkmann
2020-05-14 16:58 ` [PATCH bpf 0/3] Restrict bpf_probe_read{,str}() and bpf_trace_printk()'s %s Christoph Hellwig
2020-05-14 19:54 ` Daniel Borkmann
2020-05-14 19:58 ` Christoph Hellwig
2020-05-14 21:10 ` Daniel Borkmann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200514161607.9212-1-daniel@iogearbox.net \
--to=daniel@iogearbox.net \
--cc=ast@kernel.org \
--cc=bpf@vger.kernel.org \
--cc=brendan.d.gregg@gmail.com \
--cc=hch@lst.de \
--cc=john.fastabend@gmail.com \
--cc=mhiramat@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=yhs@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).