From: Will Drewry <wad@chromium.org>
To: Markus Gutschke <markus@chromium.org>
Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-doc@vger.kernel.org, kernel-hardening@lists.openwall.com,
netdev@vger.kernel.org, x86@kernel.org, arnd@arndb.de,
davem@davemloft.net, hpa@zytor.com, mingo@redhat.com,
oleg@redhat.com, peterz@infradead.org, rdunlap@xenotime.net,
mcgrathr@chromium.org, tglx@linutronix.de, luto@mit.edu,
eparis@redhat.com, serge.hallyn@canonical.com, djm@mindrot.org,
scarybeasts@gmail.com, indan@nul.nu, pmoore@redhat.com,
akpm@linux-foundation.org, corbet@lwn.net,
eric.dumazet@gmail.com, keescook@chromium.org
Subject: Re: [PATCH v8 5/8] seccomp: Add SECCOMP_RET_TRAP
Date: Thu, 16 Feb 2012 14:42:50 -0600 [thread overview]
Message-ID: <CABqD9hZSLqn+=jr6sWwp_eJ5WsuGpH2Khoc_7aRmYt+1ZaEGoA@mail.gmail.com> (raw)
In-Reply-To: <CAE6n16mCrJC=Sre+PT1H_VfSjW0MGyi0xtEcdcRvGMvvwXWzmA@mail.gmail.com>
On Thu, Feb 16, 2012 at 2:24 PM, Markus Gutschke <markus@chromium.org> wrote:
> SIGTRAP might not be the ideal choice of signal number, as it can make it
> very difficult to debug the program in gdb.
True enough. In theory, we could use the lower 16-bits of the return
value to let the bpf program set a signal, but not all signals are
masked synchronous and those that are probably get gdb's attention,
just not a severely :) (ILL, SEGV, BUS, TRAP, FPE). Perhaps SIGILL is
a logically appropriate option -- or letting the api user decide from
the SYNCHRONOUS_MASK set. I'm open to whatever makes sense, though.
(I wasn't even sure if it was kosher to add a new TRAP_SECCOMP value.)
cheers!
will
next prev parent reply other threads:[~2012-02-16 20:42 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-16 20:02 [PATCH v8 1/8] sk_run_filter: add support for custom load_pointer Will Drewry
2012-02-16 20:02 ` Will Drewry
2012-02-16 20:02 ` [PATCH v8 2/8] seccomp: kill the seccomp_t typedef Will Drewry
2012-02-16 20:02 ` Will Drewry
2012-02-20 2:55 ` James Morris
2012-02-16 20:02 ` [PATCH v8 3/8] seccomp: add system call filtering using BPF Will Drewry
2012-02-16 20:02 ` Will Drewry
2012-02-16 20:06 ` H. Peter Anvin
2012-02-16 20:25 ` Will Drewry
2012-02-16 21:17 ` H. Peter Anvin
2012-02-16 21:28 ` Markus Gutschke
2012-02-16 21:34 ` H. Peter Anvin
2012-02-16 21:51 ` Will Drewry
2012-02-16 22:06 ` H. Peter Anvin
2012-02-16 23:00 ` Will Drewry
2012-02-17 0:23 ` Andrew Lutomirski
2012-02-17 0:43 ` H. Peter Anvin
2012-02-17 0:43 ` H. Peter Anvin
2012-02-17 0:50 ` Eric Paris
2012-02-17 2:24 ` H. Peter Anvin
2012-02-17 2:24 ` H. Peter Anvin
2012-02-17 3:53 ` Will Drewry
2012-02-17 4:12 ` H. Peter Anvin
2012-02-17 4:12 ` H. Peter Anvin
2012-02-17 4:26 ` Will Drewry
2012-02-17 4:26 ` Will Drewry
2012-02-17 4:32 ` H. Peter Anvin
2012-02-17 4:32 ` H. Peter Anvin
2012-02-17 4:40 ` Will Drewry
2012-02-17 4:40 ` Will Drewry
2012-02-16 21:31 ` Will Drewry
2012-02-16 21:31 ` Will Drewry
2012-02-17 0:48 ` Indan Zupancic
2012-02-17 0:48 ` Indan Zupancic
2012-02-17 0:51 ` Andrew Lutomirski
2012-02-17 1:10 ` H. Peter Anvin
2012-02-17 1:25 ` Indan Zupancic
2012-02-17 1:33 ` H. Peter Anvin
2012-02-17 1:33 ` H. Peter Anvin
2012-02-17 2:00 ` Indan Zupancic
2012-02-17 2:00 ` Indan Zupancic
2012-02-17 2:16 ` Andrew Lutomirski
2012-02-17 2:22 ` H. Peter Anvin
2012-02-17 2:22 ` H. Peter Anvin
2012-02-17 3:27 ` Indan Zupancic
2012-02-17 4:09 ` H. Peter Anvin
2012-02-17 4:51 ` Indan Zupancic
2012-02-17 2:44 ` Indan Zupancic
2012-02-17 2:44 ` Indan Zupancic
2012-02-17 3:38 ` [kernel-hardening] " Will Drewry
2012-02-16 20:02 ` [PATCH v8 4/8] seccomp: add SECCOMP_RET_ERRNO Will Drewry
2012-02-16 20:02 ` Will Drewry
2012-02-16 20:02 ` [PATCH v8 5/8] seccomp: Add SECCOMP_RET_TRAP Will Drewry
2012-02-16 20:02 ` Will Drewry
[not found] ` <CAE6n16mCrJC=Sre+PT1H_VfSjW0MGyi0xtEcdcRvGMvvwXWzmA@mail.gmail.com>
2012-02-16 20:28 ` Markus Gutschke
2012-02-16 20:28 ` Markus Gutschke
2012-02-16 21:23 ` H. Peter Anvin
2012-02-16 21:23 ` H. Peter Anvin
2012-02-16 20:42 ` Will Drewry [this message]
2012-02-16 20:42 ` Will Drewry
2012-02-16 21:11 ` [PATCH v9 " Will Drewry
2012-02-16 21:11 ` Will Drewry
2012-02-16 21:11 ` [PATCH v9 8/8] Documentation: prctl/seccomp_filter Will Drewry
2012-02-16 21:28 ` [PATCH v8 5/8] seccomp: Add SECCOMP_RET_TRAP H. Peter Anvin
2012-02-16 21:28 ` H. Peter Anvin
2012-02-16 21:33 ` Will Drewry
2012-02-16 21:33 ` Will Drewry
2012-02-16 20:02 ` [PATCH v8 6/8] ptrace,seccomp: Add PTRACE_SECCOMP support Will Drewry
2012-02-16 20:02 ` Will Drewry
2012-02-17 5:08 ` Indan Zupancic
2012-02-17 5:08 ` Indan Zupancic
2012-02-17 16:23 ` Will Drewry
2012-02-17 16:23 ` Will Drewry
2012-02-17 22:55 ` Indan Zupancic
2012-02-17 22:55 ` Indan Zupancic
2012-02-21 17:31 ` Will Drewry
2012-02-21 17:31 ` Will Drewry
2012-02-16 20:02 ` [PATCH v8 7/8] x86: Enable HAVE_ARCH_SECCOMP_FILTER Will Drewry
2012-02-16 20:02 ` [PATCH v8 8/8] Documentation: prctl/seccomp_filter Will Drewry
2012-02-16 20:02 ` Will Drewry
2012-02-16 20:08 ` [PATCH v8 1/8] sk_run_filter: add support for custom load_pointer Will Drewry
2012-02-16 20:08 ` Will Drewry
2012-02-17 1:54 ` Joe Perches
2012-02-17 2:22 ` Will Drewry
2012-02-17 2:22 ` Will Drewry
2012-02-17 3:04 ` Indan Zupancic
2012-02-17 3:04 ` Indan Zupancic
2012-02-17 4:13 ` Will Drewry
2012-02-17 4:13 ` Will Drewry
2012-02-17 5:05 ` Indan Zupancic
2012-02-17 5:05 ` Indan Zupancic
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