From: David Miller <davem@davemloft.net>
To: luto@kernel.org
Cc: akpm@linux-foundation.org, viro@zeniv.linux.org.uk,
torvalds@linux-foundation.org, x86@kernel.org,
linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
cmetcalf@ezchip.com, linux-parisc@vger.kernel.org,
linux-mips@linux-mips.org, sparclinux@vger.kernel.org
Subject: Re: [PATCH v2 02/16] sparc/compat: Provide an accurate in_compat_syscall implementation
Date: Mon, 25 Jan 2016 14:51:08 -0800 (PST) [thread overview]
Message-ID: <20160125.145108.1332641183366177944.davem@davemloft.net> (raw)
Message-ID: <20160125225108.RfVKGzUSCqmpeMGDCvprCHRI23fWwdDsNYBC6pt51LE@z> (raw)
In-Reply-To: <e520030f750b29d14486aa1e99c271a0fa18f19e.1453759363.git.luto@kernel.org>
From: Andy Lutomirski <luto@kernel.org>
Date: Mon, 25 Jan 2016 14:24:16 -0800
> On sparc64 compat-enabled kernels, any task can make 32-bit and
> 64-bit syscalls. is_compat_task returns true in 32-bit tasks, which
> does not necessarily imply that the current syscall is 32-bit.
>
> Provide an in_compat_syscall implementation that checks whether the
> current syscall is compat.
>
> As far as I know, sparc is the only architecture on which
> is_compat_task checks the compat status of the task and on which the
> compat status of a syscall can differ from the compat status of the
> task. On x86, is_compat_task checks the syscall type, not the task
> type.
>
> Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
next prev parent reply other threads:[~2016-01-25 22:51 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-25 22:24 [PATCH v2 00/16] compat: Introduce and use in_compat_syscall Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 01/16] compat: Add in_compat_syscall to ask whether we're in a compat syscall Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 02/16] sparc/compat: Provide an accurate in_compat_syscall implementation Andy Lutomirski
2016-01-25 22:51 ` David Miller [this message]
2016-01-25 22:51 ` David Miller
2016-01-26 6:29 ` Sam Ravnborg
2016-01-26 6:29 ` Sam Ravnborg
2016-01-26 6:51 ` David Miller
2016-01-26 17:44 ` Sam Ravnborg
2016-01-26 17:44 ` Sam Ravnborg
2016-01-26 17:48 ` Andy Lutomirski
2016-01-26 17:48 ` Andy Lutomirski
2016-01-26 18:04 ` David Miller
2016-01-26 18:04 ` David Miller
2016-01-25 22:24 ` [PATCH v2 03/16] sparc/syscall: Fix syscall_get_arch Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 04/16] seccomp: Check in_compat_syscall, not is_compat_task, in strict mode Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 05/16] ptrace: in PEEK_SIGINFO, check syscall bitness, not task bitness Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 06/16] auditsc: For seccomp events, log syscall compat state using in_compat_syscall Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 07/16] staging/lustre: Switch from is_compat_task to in_compat_syscall Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 08/16] ext4: In ext4_dir_llseek, check syscall bitness directly Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 09/16] net/sctp: Use in_compat_syscall for sctp_getsockopt_connectx3 Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 10/16] net/xfrm_user: Use in_compat_syscall to deny compat syscalls Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 11/16] firewire: Use in_compat_syscall to check ioctl compatness Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 12/16] efivars: Use in_compat_syscall to check for compat callers Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 13/16] amdkfd: Use in_compat_syscall to check open() caller type Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 14/16] input: Redefine INPUT_COMPAT_TEST as in_compat_syscall() Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-27 19:17 ` Dmitry Torokhov
2016-01-27 19:17 ` Dmitry Torokhov
2016-01-27 20:29 ` Andy Lutomirski
2016-01-27 20:29 ` Andy Lutomirski
2016-01-27 21:06 ` Dmitry Torokhov
2016-03-22 20:51 ` Andrew Morton
2016-03-22 20:51 ` Andrew Morton
2016-03-23 18:42 ` Dmitry Torokhov
2016-01-25 22:24 ` [PATCH v2 15/16] uhid: Check write() bitness using in_compat_syscall Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
2016-01-25 22:24 ` [PATCH v2 16/16] x86/compat: Remove is_compat_task Andy Lutomirski
2016-01-25 22:24 ` Andy Lutomirski
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