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Oleg Nesterov 2b25925431 selinux: selinux_setprocattr()->ptrace_parent() needs rcu_read_lock()

commit c0c1439541 upstream.

selinux_setprocattr() does ptrace_parent(p) under task_lock(p),
but task_struct->alloc_lock doesn't pin ->parent or ->ptrace,
this looks confusing and triggers the "suspicious RCU usage"
warning because ptrace_parent() does rcu_dereference_check().

And in theory this is wrong, spin_lock()->preempt_disable()
doesn't necessarily imply rcu_read_lock() we need to access
the ->parent.

Reported-by: Evan McNabb <emcnabb@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2014-01-09 12:24:20 -08:00

apparmor

new helper: file_inode(file)

2013-02-22 23:31:31 -05:00

integrity

Revert "ima: policy for RAMFS"

2013-11-29 11:11:44 -08:00

keys

aio: don't include aio.h in sched.h

2013-05-07 20:16:25 -07:00

selinux

selinux: selinux_setprocattr()->ptrace_parent() needs rcu_read_lock()