Messages in this thread | | | From | Tejun Heo <> | Subject | [PATCHSET] ptrace: kill most tracehooks | Date | Fri, 17 Jun 2011 16:50:33 +0200 |
| |
Hello,
At this point, tracehooks aren't useful to mainline kernel and mostly just add an extra layer of obfuscation. Although they have comments, without actual in-kernel users, it is difficult to tell what are their assumptions and they're actually trying to achieve. To mainline kernel, they just aren't worth keeping around.
This patchset kills most tracehooks which aren't used from arch codes. The remaining ones will be dealt with with future changes.
0001-ptrace-kill-task_ptrace.patch 0002-ptrace-introduce-ptrace_event_enabled-and-simplify-p.patch 0003-ptrace-move-SIGTRAP-on-exec-2-logic-to-ptrace_event.patch 0004-ptrace-kill-trivial-tracehooks.patch 0005-ptrace-kill-clone-exec-tracehooks.patch 0006-ptrace-kill-detah-tracehooks.patch 0007-ptrace-s-tracehook_tracer_task-ptrace_parent.patch
Most conversions are straightforward. The only tricky one is 0006 which reimplements the decision logic.
This patch is on top of Oleg's ptrace branch[1] - 544b2c91a9 (ptrace: implement PTRACE_LISTEN), and available in the following git branch.
git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git review-tracehook
diffstat follows.
arch/s390/kernel/traps.c | 4 fs/exec.c | 9 - fs/proc/array.c | 2 fs/proc/base.c | 2 include/linux/ptrace.h | 71 ++++++--- include/linux/tracehook.h | 333 --------------------------------------------- kernel/exit.c | 43 +++-- kernel/fork.c | 43 ++++- kernel/signal.c | 22 +- mm/nommu.c | 3 mm/oom_kill.c | 3 security/apparmor/domain.c | 2 security/selinux/hooks.c | 4 13 files changed, 136 insertions(+), 405 deletions(-)
-- tejun
[1] git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc.git ptrace
| |