Steven Rostedt (Red Hat) a5c09d4c03 ring-buffer: Check if buffer exists before polling ... commit 8b8b36834d upstream. The per_cpu buffers are created one per possible CPU. But these do not mean that those CPUs are online, nor do they even exist. With the addition of the ring buffer polling, it assumes that the caller polls on an existing buffer. But this is not the case if the user reads trace_pipe from a CPU that does not exist, and this causes the kernel to crash. Simple fix is to check the cpu against buffer bitmask against to see if the buffer was allocated or not and return -ENODEV if it is not. More updates were done to pass the -ENODEV back up to userspace. Link: http://lkml.kernel.org/r/5393DB61.6060707@oracle.com Reported-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2014-07-17 16:21:06 -07:00
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acpi	…
asm-generic	mm: use paravirt friendly ops for NUMA hinting ptes	2014-05-31 13:20:30 -07:00
clocksource	…
crypto	…
drm	Merge tag 'ttm-fixes-3.14-2014-02-18' of git://people.freedesktop.org/~thomash/linux into drm-fixes	2014-02-19 08:21:26 +10:00
dt-bindings	dt: tegra: remove non-existent clock IDs	2014-05-06 07:59:38 -07:00
keys	…
kvm	ARM: KVM: fix non-VGIC compilation	2014-03-06 09:47:42 +01:00
linux	ring-buffer: Check if buffer exists before polling	2014-07-17 16:21:06 -07:00
math-emu	…
media	…
memory	…
misc	…
net	net: fix inet_getid() and ipv6_select_ident() bugs	2014-06-26 15:15:39 -04:00
pcmcia	…
ras	…
rdma	IB/core: Don't resolve passive side RoCE L2 address in CMA REQ handler	2014-05-06 07:59:28 -07:00
rxrpc	…
scsi	scsi: fix our current target reap infrastructure	2014-05-31 13:20:27 -07:00
sound	ALSA: control: Protect user controls against concurrent access	2014-06-26 15:15:43 -04:00
target	target: Report correct response length for some commands	2014-06-30 20:12:00 -07:00
trace	tracing: Fix syscall_*regfunc() vs copy_process() race	2014-07-06 18:57:29 -07:00
uapi	usb: gadget: f_fs: resurect usb_functionfs_descs_head structure	2014-07-09 11:18:24 -07:00
video	…
xen	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2014-02-14 10:45:18 -08:00
Kbuild	…