From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Fri, 15 May 2015 10:02:23 +0000 (+0100)
Subject: ARM: fix missing syscall trace exit
X-Git-Tag: omap-for-v4.2/wakeirq-drivers-v2^2~2^2~31^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b97937246d8b97c0760d16d8992c7937bdf5e6a;p=pandora-kernel.git

ARM: fix missing syscall trace exit

Josh Stone reports:

  I've discovered a case where both arm and arm64 will miss a ptrace
  syscall-exit that they should report.  If the syscall is entered
  without TIF_SYSCALL_TRACE set, then it goes on the fast path.  It's
  then possible to have TIF_SYSCALL_TRACE added in the middle of the
  syscall, but ret_fast_syscall doesn't check this flag again.

Fix this by always checking for a syscall trace in the fast exit path.

Reported-by: Josh Stone <jistone@redhat.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

Reading git-diff-tree failed