diff options
| author | Ingo Molnar <mingo@elte.hu> | 2010-09-15 10:27:31 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-09-15 10:27:31 +0200 |
| commit | 3aabae7d9dfaed60effe93662f02c19bafc18537 (patch) | |
| tree | af94cdd69add07601d9f3f5988dfc1dc255e3886 /security/keys/keyctl.c | |
| parent | 79e406d7b00ab2b261ae32a59f266fd3b7af6f29 (diff) | |
| parent | 57c072c7113f54f9512624d6c665db6184448782 (diff) | |
Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core
Diffstat (limited to 'security/keys/keyctl.c')
| -rw-r--r-- | security/keys/keyctl.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/security/keys/keyctl.c b/security/keys/keyctl.c index b2b0998d6ab..60924f6a52d 100644 --- a/security/keys/keyctl.c +++ b/security/keys/keyctl.c @@ -1272,6 +1272,7 @@ long keyctl_session_to_parent(void) keyring_r = NULL; me = current; + rcu_read_lock(); write_lock_irq(&tasklist_lock); parent = me->real_parent; @@ -1304,7 +1305,8 @@ long keyctl_session_to_parent(void) goto not_permitted; /* the keyrings must have the same UID */ - if (pcred->tgcred->session_keyring->uid != mycred->euid || + if ((pcred->tgcred->session_keyring && + pcred->tgcred->session_keyring->uid != mycred->euid) || mycred->tgcred->session_keyring->uid != mycred->euid) goto not_permitted; @@ -1319,6 +1321,7 @@ long keyctl_session_to_parent(void) set_ti_thread_flag(task_thread_info(parent), TIF_NOTIFY_RESUME); write_unlock_irq(&tasklist_lock); + rcu_read_unlock(); if (oldcred) put_cred(oldcred); return 0; @@ -1327,6 +1330,7 @@ already_same: ret = 0; not_permitted: write_unlock_irq(&tasklist_lock); + rcu_read_unlock(); put_cred(cred); return ret; |