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Oleg Nesterov e6bc60b8fb tracing: Fix syscall_*regfunc() vs copy_process() race 
commit 4af4206be2 upstream.

syscall_regfunc() and syscall_unregfunc() should set/clear
TIF_SYSCALL_TRACEPOINT system-wide, but do_each_thread() can race
with copy_process() and miss the new child which was not added to
the process/thread lists yet.

Change copy_process() to update the child's TIF_SYSCALL_TRACEPOINT
under tasklist.

Link: http://lkml.kernel.org/p/20140413185854.GB20668@redhat.com

Fixes: a871bd33a6 "tracing: Add syscall tracepoints"
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-06 18:54:16 -07:00
..
acpi ACPI / hotplug: Fix conflicted PCI bridge notify handlers 2013-12-04 10:57:04 -08:00
asm-generic mm: use paravirt friendly ops for NUMA hinting ptes 2014-05-30 21:52:12 -07:00
clocksource clocksource: arch_timer: use virtual counters 2014-01-09 12:24:26 -08:00
crypto crypto: scatterwalk - Use sg_chain_ptr on chain entries 2013-12-11 22:36:29 -08:00
drm drm/radeon: 0x9649 is SUMO2 not SUMO 2014-01-09 12:24:22 -08:00
dt-bindings
keys
linux ptrace,x86: force IRET path after a ptrace_stop() 2014-07-06 18:54:15 -07:00
math-emu
media media: v4l2: added missing mutex.h include to v4l2-ctrls.h 2013-09-26 17:18:26 -07:00
memory
misc
net net: fix inet_getid() and ipv6_select_ident() bugs 2014-06-26 15:12:38 -04:00
pcmcia
ras
rdma
rxrpc
scsi scsi: fix our current target reap infrastructure 2014-05-30 21:52:11 -07:00
sound ALSA: control: Protect user controls against concurrent access 2014-06-26 15:12:43 -04:00
target target: Report correct response length for some commands 2014-06-30 20:09:45 -07:00
trace tracing: Fix syscall_*regfunc() vs copy_process() race 2014-07-06 18:54:16 -07:00
uapi ALSA: compress: Cancel the optimization of compiler and fix the size of struct for all platform. 2014-06-26 15:12:41 -04:00
video Merge branch 'fbdev-3.10-fixes' of git://gitorious.org/linux-omap-dss2/linux into linux-fbdev/for-3.10-fixes 2013-05-29 17:00:34 +08:00
xen xenbus: delay xenbus frontend resume if xenstored is not running 2013-05-29 09:04:19 -04:00
Kbuild UAPI: remove empty Kbuild files 2013-04-30 17:04:09 -07:00