From: Andy Lutomirski <luto@amacapital.net>
Date: Fri, 21 Nov 2014 21:26:07 +0000 (-0800)
Subject: uprobes, x86: Fix _TIF_UPROBE vs _TIF_NOTIFY_RESUME
X-Git-Tag: omap-for-v3.19/fixes-for-merge-window~75
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=82975bc6a6df743b9a01810fb32cb65d0ec5d60b;p=pandora-kernel.git

uprobes, x86: Fix _TIF_UPROBE vs _TIF_NOTIFY_RESUME

x86 call do_notify_resume on paranoid returns if TIF_UPROBE is set but
not on non-paranoid returns.  I suspect that this is a mistake and that
the code only works because int3 is paranoid.

Setting _TIF_NOTIFY_RESUME in the uprobe code was probably a workaround
for the x86 bug.  With that bug fixed, we can remove _TIF_NOTIFY_RESUME
from the uprobes code.

Reported-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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