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| author | Oleg Nesterov <oleg@redhat.com> | 2013-12-23 22:45:01 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-09 20:25:08 (GMT) |
| commit | 3a3f7cfe5c16170aeb0dd2654f464cfbd2332b1d (patch) | |
| tree | 78f00da06241774350fd3193ca09a978ac0981e1 /sound | |
| parent | a37a5f4dd1fc8e716316ad7f528037d69a13d0ba (diff) | |
| download | linux-fsl-qoriq-3a3f7cfe5c16170aeb0dd2654f464cfbd2332b1d.tar.xz | |
selinux: selinux_setprocattr()->ptrace_parent() needs rcu_read_lock()
commit c0c1439541f5305b57a83d599af32b74182933fe 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>
Diffstat (limited to 'sound')
0 files changed, 0 insertions, 0 deletions