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| author | Mike Rapoport <rppt@linux.vnet.ibm.com> | 2018-02-06 15:40:17 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-02-06 18:32:46 -0800 |
| commit | 2ee0826085d1c0281cb60c1f4bc3e0c27efeedc3 (patch) | |
| tree | bb2dc8915be7e4f0fea7438edf380d84b896f80a /security/yama | |
| parent | eab216e9cc636c24cec06bdf57a80f4c26b34493 (diff) | |
| download | linux-stable-2ee0826085d1c0281cb60c1f4bc3e0c27efeedc3.tar.gz linux-stable-2ee0826085d1c0281cb60c1f4bc3e0c27efeedc3.tar.bz2 linux-stable-2ee0826085d1c0281cb60c1f4bc3e0c27efeedc3.zip | |
pids: introduce find_get_task_by_vpid() helper
There are several functions that do find_task_by_vpid() followed by
get_task_struct(). We can use a helper function instead.
Link: http://lkml.kernel.org/r/1509602027-11337-1-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'security/yama')
| -rw-r--r-- | security/yama/yama_lsm.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/security/yama/yama_lsm.c b/security/yama/yama_lsm.c index 8298e094f4f7..ffda91a4a1aa 100644 --- a/security/yama/yama_lsm.c +++ b/security/yama/yama_lsm.c @@ -250,15 +250,10 @@ int yama_task_prctl(int option, unsigned long arg2, unsigned long arg3, } else { struct task_struct *tracer; - rcu_read_lock(); - tracer = find_task_by_vpid(arg2); - if (tracer) - get_task_struct(tracer); - else + tracer = find_get_task_by_vpid(arg2); + if (!tracer) { rc = -EINVAL; - rcu_read_unlock(); - - if (tracer) { + } else { rc = yama_ptracer_add(tracer, myself); put_task_struct(tracer); } |