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Commit 375f0183 authored by Kees Cook's avatar Kees Cook
Browse files

parisc/ptrace: run seccomp after ptrace 



Close the hole where ptrace can change a syscall out from under seccomp.

Signed-off-by: default avatarKees Cook <keescook@chromium.org>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-parisc@vger.kernel.org
parent 2ac3c8d1

arch/parisc/kernel/ptrace.c

+5 −4
Original line number Diff line number Diff line
@@ -311,10 +311,6 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, 


long do_syscall_trace_enter(struct pt_regs *regs)

{

	/* Do the secure computing check first. */

	if (secure_computing(NULL) == -1)

		return -1;



	if (test_thread_flag(TIF_SYSCALL_TRACE) &&

	    tracehook_report_syscall_entry(regs)) {

		/*
@@ -325,6 +321,11 @@ long do_syscall_trace_enter(struct pt_regs *regs) 
		regs->gr[20] = -1UL;

		goto out;

	}



	/* Do the secure computing check after ptrace. */

	if (secure_computing(NULL) == -1)

		return -1;



#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS

	if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))

		trace_sys_enter(regs, regs->gr[20]);