Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2ac3c8d1 authored by Kees Cook's avatar Kees Cook
Browse files

MIPS/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: Ralf Baechle <ralf@linux-mips.org>
Cc: "Maciej W. Rozycki" <macro@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
parent a5cd110c

arch/mips/kernel/ptrace.c

+4 −5
Original line number Diff line number Diff line
@@ -888,17 +888,16 @@ long arch_ptrace(struct task_struct *child, long request, 
 */

asmlinkage long syscall_trace_enter(struct pt_regs *regs, long syscall)

{

	long ret = 0;

	user_exit();



	current_thread_info()->syscall = syscall;



	if (secure_computing(NULL) == -1)

		return -1;



	if (test_thread_flag(TIF_SYSCALL_TRACE) &&

	    tracehook_report_syscall_entry(regs))

		ret = -1;

		return -1;



	if (secure_computing(NULL) == -1)

		return -1;



	if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))

		trace_sys_enter(regs, regs->regs[2]);