Messages in this thread | | | Date | Thu, 30 Oct 2014 10:18:08 +0000 | From | Russell King - ARM Linux <> | Subject | Re: [PATCH] tracing/syscalls: ignore numbers outside NR_syscalls' range |
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On Thu, Oct 30, 2014 at 01:26:06AM -0700, Christoph Hellwig wrote: > On Wed, Oct 29, 2014 at 11:06:58PM +0100, Rabin Vincent wrote: > > ARM has some private syscalls (for example, set_tls(2)) which lie > > outside the range of NR_syscalls. If any of these are called while > > syscall tracing is being performed, out-of-bounds array access will > > occur in the ftrace and perf sys_{enter,exit} handlers. > > While this patch looks like good caution, having syscalls outside of > NR_syscalls seems like a receipe for a disaster. Can you try to fix > that issue as ell, please?
No. We've had them since the inception of Linux on ARM. They predate this tracing crap by more than a decade. We're not changing them because that would be a massive user API breakage.
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