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tile/ptrace: run seccomp after ptrace 

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

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Chris Metcalf <cmetcalf@mellanox.com>
This commit is contained in:
Kees Cook 2016-06-02 19:56:43 -07:00
parent 1addc57e11
commit 635efc7029
1 changed files with 6 additions and 5 deletions
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11
arch/tile/kernel/ptrace.c
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@ -255,14 +255,15 @@ int do_syscall_trace_enter(struct pt_regs *regs)
{
u32 work = ACCESS_ONCE(current_thread_info()->flags);
if ((work & _TIF_SYSCALL_TRACE) &&
tracehook_report_syscall_entry(regs)) {
regs->regs[TREG_SYSCALL_NR] = -1;
return -1;
}
if (secure_computing(NULL) == -1)
return -1;
if (work & _TIF_SYSCALL_TRACE) {
if (tracehook_report_syscall_entry(regs))
regs->regs[TREG_SYSCALL_NR] = -1;
}
if (work & _TIF_SYSCALL_TRACEPOINT)
trace_sys_enter(regs, regs->regs[TREG_SYSCALL_NR]);