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| author | Pavel Emelyanov <xemul@openvz.org> | 2007-11-26 21:21:49 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-11-26 21:21:49 +0100 |
| commit | 5e8869bb699d50be5c0733edfc71cfcd5b43e10a (patch) | |
| tree | 5ce6e7b25ffb2c78bb876861e4b0c83fd6f9b565 /kernel/user.c | |
| parent | 2ffbb8377c7a0713baf6644e285adc27a5654582 (diff) | |
| download | lwn-5e8869bb699d50be5c0733edfc71cfcd5b43e10a.tar.gz lwn-5e8869bb699d50be5c0733edfc71cfcd5b43e10a.zip | |
sched: don't forget to unlock uids_mutex on error paths
The commit
commit 5cb350baf580017da38199625b7365b1763d7180
Author: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Date: Mon Oct 15 17:00:14 2007 +0200
sched: group scheduling, sysfs tunables
introduced the uids_mutex and the helpers to lock/unlock it.
Unfortunately, the error paths of alloc_uid() were not patched
to unlock it.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/user.c')
| -rw-r--r-- | kernel/user.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/user.c b/kernel/user.c index 0f3aa0234107..8320a87f3e5a 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -337,8 +337,11 @@ struct user_struct * alloc_uid(struct user_namespace *ns, uid_t uid) struct user_struct *new; new = kmem_cache_alloc(uid_cachep, GFP_KERNEL); - if (!new) + if (!new) { + uids_mutex_unlock(); return NULL; + } + new->uid = uid; atomic_set(&new->__count, 1); atomic_set(&new->processes, 0); @@ -355,6 +358,7 @@ struct user_struct * alloc_uid(struct user_namespace *ns, uid_t uid) if (alloc_uid_keyring(new, current) < 0) { kmem_cache_free(uid_cachep, new); + uids_mutex_unlock(); return NULL; } @@ -362,6 +366,7 @@ struct user_struct * alloc_uid(struct user_namespace *ns, uid_t uid) key_put(new->uid_keyring); key_put(new->session_keyring); kmem_cache_free(uid_cachep, new); + uids_mutex_unlock(); return NULL; } |