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| author |   Oleg Nesterov <oleg@redhat.com> | 2013-12-23 17:45:01 -0500 |
|---|---|---|
| committer |   Paul Moore <pmoore@redhat.com> | 2013-12-23 17:45:17 -0500 |
| commit | c0c1439541f5305b57a83d599af32b74182933fe (patch) | |
| tree | e430e1d9e869d9e08a0a7e8677951465568d17dc /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | selinux: fix broken peer recv check (diff) | |
| download | linux-dev-c0c1439541f5305b57a83d599af32b74182933fe.tar.xz linux-dev-c0c1439541f5305b57a83d599af32b74182933fe.zip | |
selinux: selinux_setprocattr()->ptrace_parent() needs rcu_read_lock()
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>
Cc: stable@vger.kernel.org
Signed-off-by: Paul Moore <pmoore@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions