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author | 2011-11-16 23:15:31 -0800 | |
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committer | 2012-04-07 16:55:51 -0700 | |
commit | c4a4d603796c727b9555867571f89483be9c565e (patch) | |
tree | ae3b47a7b8b35c866df53cb4b4a051d49a28904a /kernel/signal.c | |
parent | cred: Add forward declaration of init_user_ns in all cases. (diff) | |
download | linux-c4a4d603796c727b9555867571f89483be9c565e.tar.gz linux-c4a4d603796c727b9555867571f89483be9c565e.tar.bz2 linux-c4a4d603796c727b9555867571f89483be9c565e.zip |
userns: Use cred->user_ns instead of cred->user->user_ns
Optimize performance and prepare for the removal of the user_ns reference
from user_struct. Remove the slow long walk through cred->user->user_ns and
instead go straight to cred->user_ns.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r-- | kernel/signal.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/signal.c b/kernel/signal.c index 17afcaf582d0..e2c5d84f2dac 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -767,14 +767,14 @@ static int kill_ok_by_cred(struct task_struct *t) const struct cred *cred = current_cred(); const struct cred *tcred = __task_cred(t); - if (cred->user->user_ns == tcred->user->user_ns && + if (cred->user_ns == tcred->user_ns && (cred->euid == tcred->suid || cred->euid == tcred->uid || cred->uid == tcred->suid || cred->uid == tcred->uid)) return 1; - if (ns_capable(tcred->user->user_ns, CAP_KILL)) + if (ns_capable(tcred->user_ns, CAP_KILL)) return 1; return 0; |