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Message-ID: <1423468516-8688-3-git-send-email-bogdan.purcareata@freescale.com> Date: Mon, 9 Feb 2015 07:55:15 +0000 From: Bogdan Purcareata <bogdan.purcareata@...escale.com> To: <benh@...nel.crashing.org>, <paulus@...ba.org>, <linuxppc-dev@...ts.ozlabs.org> CC: <linux-kernel@...r.kernel.org>, <pmoore@...hat.com>, <strosake@...ux.vnet.ibm.com>, Bogdan Purcareata <bogdan.purcareata@...escale.com> Subject: [PATCH 2/3] powerpc: Relax secure computing on syscall entry trace The secure_computing_strict will just force the kernel to panic on secure_computing failure. Once SECCOMP_FILTER support is enabled in the kernel, syscalls can be denied without system failure. Signed-off-by: Bogdan Purcareata <bogdan.purcareata@...escale.com> --- arch/powerpc/kernel/ptrace.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 100e01c..5c654ac 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -1772,7 +1772,9 @@ long do_syscall_trace_enter(struct pt_regs *regs) user_exit(); - secure_computing_strict(regs->gpr[0]); + /* Do the secure computing check first; failures should be fast. */ + if (secure_computing(regs->gpr[0]) == -1) + return -1L; if (test_thread_flag(TIF_SYSCALL_TRACE) && tracehook_report_syscall_entry(regs)) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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