From: Will Drewry <wad@chromium.org> To: linux-kernel@vger.kernel.org Cc: 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, markus@chromium.org, coreyb@linux.vnet.ibm.com, keescook@chromium.org, Will Drewry <wad@chromium.org> Subject: [PATCH v15 05/13] asm/syscall.h: add syscall_get_arch Date: Wed, 14 Mar 2012 22:11:57 -0500 [thread overview] Message-ID: <1331781125-15658-6-git-send-email-wad@chromium.org> (raw) In-Reply-To: <1331781125-15658-1-git-send-email-wad@chromium.org> Adds a stub for a function that will return the AUDIT_ARCH_* value appropriate to the supplied task based on the system call convention. For audit's use, the value can generally be hard-coded at the audit-site. However, for other functionality not inlined into syscall entry/exit, this makes that information available. seccomp_filter is the first planned consumer and, as such, the comment indicates a tie to HAVE_ARCH_SECCOMP_FILTER. That is probably an unneeded detail. Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Suggested-by: Roland McGrath <mcgrathr@chromium.org> Signed-off-by: Will Drewry <wad@chromium.org> v14: rebase/nochanges v13: rebase on to 88ebdda6159ffc15699f204c33feb3e431bf9bdc v12: rebase on to linux-next v11: fixed improper return type v10: introduced --- include/asm-generic/syscall.h | 14 ++++++++++++++ 1 files changed, 14 insertions(+), 0 deletions(-) diff --git a/include/asm-generic/syscall.h b/include/asm-generic/syscall.h index 5c122ae..a2c13dc 100644 --- a/include/asm-generic/syscall.h +++ b/include/asm-generic/syscall.h @@ -142,4 +142,18 @@ void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs, unsigned int i, unsigned int n, const unsigned long *args); +/** + * syscall_get_arch - return the AUDIT_ARCH for the current system call + * @task: task of interest, must be in system call entry tracing + * @regs: task_pt_regs() of @task + * + * Returns the AUDIT_ARCH_* based on the system call convention in use. + * + * It's only valid to call this when @task is stopped on entry to a system + * call, due to %TIF_SYSCALL_TRACE, %TIF_SYSCALL_AUDIT, or %TIF_SECCOMP. + * + * Note, at present this function is only required with + * CONFIG_HAVE_ARCH_SECCOMP_FILTER. + */ +int syscall_get_arch(struct task_struct *task, struct pt_regs *regs); #endif /* _ASM_SYSCALL_H */ -- 1.7.5.4
WARNING: multiple messages have this Message-ID (diff)
From: Will Drewry <wad@chromium.org> To: linux-kernel@vger.kernel.org Cc: 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, markus@chromium.org, coreyb@linux.vnet.ibm.com, keescook@chromium.org, Will Drewry <wad@chromium.org> Subject: [kernel-hardening] [PATCH v15 05/13] asm/syscall.h: add syscall_get_arch Date: Wed, 14 Mar 2012 22:11:57 -0500 [thread overview] Message-ID: <1331781125-15658-6-git-send-email-wad@chromium.org> (raw) In-Reply-To: <1331781125-15658-1-git-send-email-wad@chromium.org> Adds a stub for a function that will return the AUDIT_ARCH_* value appropriate to the supplied task based on the system call convention. For audit's use, the value can generally be hard-coded at the audit-site. However, for other functionality not inlined into syscall entry/exit, this makes that information available. seccomp_filter is the first planned consumer and, as such, the comment indicates a tie to HAVE_ARCH_SECCOMP_FILTER. That is probably an unneeded detail. Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Suggested-by: Roland McGrath <mcgrathr@chromium.org> Signed-off-by: Will Drewry <wad@chromium.org> v14: rebase/nochanges v13: rebase on to 88ebdda6159ffc15699f204c33feb3e431bf9bdc v12: rebase on to linux-next v11: fixed improper return type v10: introduced --- include/asm-generic/syscall.h | 14 ++++++++++++++ 1 files changed, 14 insertions(+), 0 deletions(-) diff --git a/include/asm-generic/syscall.h b/include/asm-generic/syscall.h index 5c122ae..a2c13dc 100644 --- a/include/asm-generic/syscall.h +++ b/include/asm-generic/syscall.h @@ -142,4 +142,18 @@ void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs, unsigned int i, unsigned int n, const unsigned long *args); +/** + * syscall_get_arch - return the AUDIT_ARCH for the current system call + * @task: task of interest, must be in system call entry tracing + * @regs: task_pt_regs() of @task + * + * Returns the AUDIT_ARCH_* based on the system call convention in use. + * + * It's only valid to call this when @task is stopped on entry to a system + * call, due to %TIF_SYSCALL_TRACE, %TIF_SYSCALL_AUDIT, or %TIF_SECCOMP. + * + * Note, at present this function is only required with + * CONFIG_HAVE_ARCH_SECCOMP_FILTER. + */ +int syscall_get_arch(struct task_struct *task, struct pt_regs *regs); #endif /* _ASM_SYSCALL_H */ -- 1.7.5.4
next prev parent reply other threads:[~2012-03-15 3:14 UTC|newest] Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-03-15 3:11 [PATCH v15 00/13] seccomp_filter: syscall filtering using BPF Will Drewry 2012-03-15 3:11 ` [kernel-hardening] " Will Drewry 2012-03-15 3:11 ` [PATCH v15 01/13] sk_run_filter: add BPF_S_ANC_SECCOMP_LD_W Will Drewry 2012-03-15 3:11 ` [kernel-hardening] " Will Drewry 2012-03-16 18:15 ` Eric Dumazet 2012-03-16 18:15 ` [kernel-hardening] " Eric Dumazet 2012-03-15 3:11 ` [PATCH v15 02/13] net/compat.c,linux/filter.h: share compat_sock_fprog Will Drewry 2012-03-15 3:11 ` [kernel-hardening] " Will Drewry 2012-03-16 18:16 ` Eric Dumazet 2012-03-16 18:16 ` [kernel-hardening] " Eric Dumazet 2012-03-16 19:23 ` Will Drewry 2012-03-16 19:23 ` [kernel-hardening] " Will Drewry 2012-03-15 3:11 ` [PATCH v15 03/13] seccomp: kill the seccomp_t typedef Will Drewry 2012-03-15 3:11 ` [kernel-hardening] " Will Drewry 2012-03-15 3:11 ` [PATCH v15 04/13] arch/x86: add syscall_get_arch to syscall.h Will Drewry 2012-03-15 3:11 ` [kernel-hardening] " Will Drewry 2012-03-25 19:34 ` H. Peter Anvin 2012-03-25 19:34 ` [kernel-hardening] " H. Peter Anvin 2012-04-11 3:13 ` Will Drewry 2012-04-11 3:13 ` [kernel-hardening] " Will Drewry 2012-04-11 3:16 ` H. Peter Anvin 2012-04-11 3:16 ` [kernel-hardening] " H. Peter Anvin 2012-04-11 3:20 ` H. Peter Anvin 2012-04-11 3:20 ` [kernel-hardening] " H. Peter Anvin 2012-04-11 15:41 ` Will Drewry 2012-04-11 15:41 ` [kernel-hardening] " Will Drewry 2012-03-15 3:11 ` Will Drewry [this message] 2012-03-15 3:11 ` [kernel-hardening] [PATCH v15 05/13] asm/syscall.h: add syscall_get_arch Will Drewry 2012-03-15 3:11 ` [PATCH v15 06/13] seccomp: add system call filtering using BPF Will Drewry 2012-03-15 3:11 ` [kernel-hardening] " Will Drewry 2012-03-25 7:31 ` Vladimir Murzin 2012-03-25 7:31 ` [kernel-hardening] " Vladimir Murzin 2012-03-15 3:11 ` [PATCH v15 07/13] seccomp: remove duplicated failure logging Will Drewry 2012-03-15 3:11 ` [kernel-hardening] " Will Drewry 2012-03-15 3:12 ` [PATCH v15 08/13] seccomp: add SECCOMP_RET_ERRNO Will Drewry 2012-03-15 3:12 ` [kernel-hardening] " Will Drewry 2012-03-15 3:12 ` [PATCH v15 09/13] signal, x86: add SIGSYS info and make it synchronous Will Drewry 2012-03-15 3:12 ` [kernel-hardening] " Will Drewry 2012-03-15 3:12 ` [PATCH v15 10/13] seccomp: Add SECCOMP_RET_TRAP Will Drewry 2012-03-15 3:12 ` [kernel-hardening] " Will Drewry 2012-03-15 3:12 ` [PATCH v15 11/13] ptrace,seccomp: Add PTRACE_SECCOMP support Will Drewry 2012-03-15 3:12 ` [kernel-hardening] " Will Drewry 2012-03-15 4:49 ` Indan Zupancic 2012-03-15 4:49 ` [kernel-hardening] " Indan Zupancic 2012-03-15 4:49 ` Indan Zupancic 2012-03-15 4:49 ` Indan Zupancic 2012-03-15 14:40 ` Will Drewry 2012-03-15 14:40 ` [kernel-hardening] " Will Drewry 2012-03-15 3:12 ` [PATCH v15 12/13] x86: Enable HAVE_ARCH_SECCOMP_FILTER Will Drewry 2012-03-15 3:12 ` [kernel-hardening] " Will Drewry 2012-03-15 3:12 ` [PATCH v15 13/13] Documentation: prctl/seccomp_filter Will Drewry 2012-03-15 3:12 ` [kernel-hardening] " Will Drewry 2012-03-25 19:36 ` [PATCH v15 00/13] seccomp_filter: syscall filtering using BPF H. Peter Anvin 2012-03-25 19:36 ` [kernel-hardening] " H. Peter Anvin 2012-03-26 16:53 ` Will Drewry 2012-03-26 16:53 ` [kernel-hardening] " Will Drewry
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