uprobes: misc bugfixes

Ingo, please pull from

git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc uprobes/core

Mostly bugfixes. Nothing really serious, but probably makes sense for 3.7 anyway, everything looks straightforward enough.

Oleg Nesterov (19):
uprobes: Do not leak UTASK_BP_HIT if find_active_uprobe() fails
uprobes: Do not setup ->active_uprobe/state prematurely
uprobes: Fix UPROBE_SKIP_SSTEP checks in handle_swbp()
uprobes: Kill UTASK_BP_HIT state
uprobes: Move clear_thread_flag(TIF_UPROBE) to uprobe_notify_resume()
uprobes: Change write_opcode() to use FOLL_FORCE
uprobes: Change valid_vma() to demand VM_MAYEXEC rather than VM_EXEC
uprobes: Restrict valid_vma(false) to skip VM_SHARED vmas
uprobes: Kill set_swbp()->is_swbp_at_addr()
uprobes: Introduce copy_opcode(), kill read_opcode()
uprobes: Kill set_orig_insn()->is_swbp_at_addr()
uprobes: Simplify is_swbp_at_addr(), remove stale comments uprobes/x86: Only rep+nop can be emulated correctly
uprobes: Don't return success if alloc_uprobe() fails
uprobes: Do not delete uprobe if uprobe_unregister() fails
uprobes: Fix handle_swbp() vs unregister() + register() race
uprobes: Introduce prepare_uprobe()
uprobes: Fix prepare_uprobe() race with itself
uprobes: Fix the racy uprobe->flags manipulation

 arch/x86/kernel/signal.c  |    4 +-
 arch/x86/kernel/uprobes.c |   16 +--
 include/linux/uprobes.h   |   11 --
 kernel/events/uprobes.c   |  345 +++++++++++++++++++++------------------------
 4 files changed, 165 insertions(+), 211 deletions(-)