The patch titled Merge multiple error paths in alloc_uid into one has been added to the -mm tree. Its filename is merge-multiple-error-paths-in-alloc_uid-into-one.patch *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find out what to do about this ------------------------------------------------------ Subject: Merge multiple error paths in alloc_uid into one From: Pavel Emelyanov <xemul@xxxxxxxxxx> There are already 4 error paths in alloc_uid() that do incremental rollbacks. I think it's time to merge them. This costs us 8 lines of code :) Maybe it would be better to merge this patch with the previous one, but I remember that some time ago I sent a similar patch (fixing the error path and cleaning it), but I was told to make two patches in such cases. Signed-off-by: Pavel Emelyanov <xemul@xxxxxxxxxx> Acked-by: Dhaval Giani <dhaval@xxxxxxxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- kernel/user.c | 47 ++++++++++++++++++++--------------------------- 1 file changed, 20 insertions(+), 27 deletions(-) diff -puN kernel/user.c~merge-multiple-error-paths-in-alloc_uid-into-one kernel/user.c --- a/kernel/user.c~merge-multiple-error-paths-in-alloc_uid-into-one +++ a/kernel/user.c @@ -320,7 +320,7 @@ void free_uid(struct user_struct *up) struct user_struct * alloc_uid(struct user_namespace *ns, uid_t uid) { struct hlist_head *hashent = uidhashentry(ns, uid); - struct user_struct *up; + struct user_struct *up, *new; /* Make uid_hash_find() + uids_user_create() + uid_hash_insert() * atomic. @@ -332,13 +332,9 @@ struct user_struct * alloc_uid(struct us spin_unlock_irq(&uidhash_lock); if (!up) { - struct user_struct *new; - new = kmem_cache_alloc(uid_cachep, GFP_KERNEL); - if (!new) { - uids_mutex_unlock(); - return NULL; - } + if (!new) + goto out_unlock; new->uid = uid; atomic_set(&new->__count, 1); @@ -354,28 +350,14 @@ struct user_struct * alloc_uid(struct us #endif new->locked_shm = 0; - if (alloc_uid_keyring(new, current) < 0) { - kmem_cache_free(uid_cachep, new); - uids_mutex_unlock(); - return NULL; - } + if (alloc_uid_keyring(new, current) < 0) + goto out_free_user; - if (sched_create_user(new) < 0) { - key_put(new->uid_keyring); - key_put(new->session_keyring); - kmem_cache_free(uid_cachep, new); - uids_mutex_unlock(); - return NULL; - } + if (sched_create_user(new) < 0) + goto out_put_keys; - if (uids_user_create(new)) { - sched_destroy_user(new); - key_put(new->uid_keyring); - key_put(new->session_keyring); - kmem_cache_free(uid_cachep, new); - uids_mutex_unlock(); - return NULL; - } + if (uids_user_create(new)) + goto out_destoy_sched; /* * Before adding this, check whether we raced @@ -403,6 +385,17 @@ struct user_struct * alloc_uid(struct us uids_mutex_unlock(); return up; + +out_destoy_sched: + sched_destroy_user(new); +out_put_keys: + key_put(new->uid_keyring); + key_put(new->session_keyring); +out_free_user: + kmem_cache_free(uid_cachep, new); +out_unlock: + uids_mutex_unlock(); + return NULL; } void switch_uid(struct user_struct *new_user) _ Patches currently in -mm which might be from xemul@xxxxxxxxxx are wait_task_stopped-dont-use-task_pid_nr_ns-lockless.patch ipc-lost-unlock-and-fput-in-mqueuec-on-error-path.patch git-net.patch dont-forget-to-unlock-uids_mutex-on-error-paths.patch merge-multiple-error-paths-in-alloc_uid-into-one.patch memory-controller-add-documentation.patch memory-controller-resource-counters-v7.patch memory-controller-containers-setup-v7.patch memory-controller-accounting-setup-v7.patch memory-controller-memory-accounting-v7.patch memory-controller-task-migration-v7.patch memory-controller-add-per-container-lru-and-reclaim-v7.patch memory-controller-add-per-container-lru-and-reclaim-v7-memcgroup-fix-try_to_free-order.patch memory-controller-improve-user-interface.patch memory-controller-oom-handling-v7.patch memory-controller-add-switch-to-control-what-type-of-pages-to-limit-v7.patch memory-controller-make-page_referenced-container-aware-v7.patch memory-controller-make-charging-gfp-mask-aware.patch memcgroup-reinstate-swapoff-mod.patch bugfix-for-memory-cgroup-controller-charge-refcnt-race-fix.patch bugfix-for-memory-cgroup-controller-fix-error-handling-path-in-mem_charge_cgroup.patch bugfix-for-memory-controller-add-helper-function-for-assigning-cgroup-to-page.patch bugfix-for-memory-cgroup-controller-avoid-pagelru-page-in-mem_cgroup_isolate_pages.patch bugfix-for-memory-cgroup-controller-avoid-pagelru-page-in-mem_cgroup_isolate_pages-fix.patch memcgroup-fix-zone-isolation-oom.patch memcgroup-revert-swap_state-mods.patch bugfix-for-memory-cgroup-controller-migration-under-memory-controller-fix.patch memory-cgroup-enhancements-fix-zone-handling-in-try_to_free_mem_cgroup_page.patch memory-cgroup-enhancements-force_empty-interface-for-dropping-all-account-in-empty-cgroup.patch memory-cgroup-enhancements-remember-a-page-is-charged-as-page-cache.patch memory-cgroup-enhancements-remember-a-page-is-on-active-list-of-cgroup-or-not.patch memory-cgroup-enhancements-add-status-accounting-function-for-memory-cgroup.patch memory-cgroup-enhancements-add-status-accounting-function-for-memory-cgroup-checkpatch-fixes.patch memory-cgroup-enhancements-add-status-accounting-function-for-memory-cgroup-fix-1.patch memory-cgroup-enhancements-add-status-accounting-function-for-memory-cgroup-uninlining.patch memory-cgroup-enhancements-add-status-accounting-function-for-memory-cgroup-fix-2.patch memory-cgroup-enhancements-add-memorystat-file.patch memory-cgroup-enhancements-add-memorystat-file-checkpatch-fixes.patch memory-cgroup-enhancements-add-memorystat-file-printk-fix.patch memory-cgroup-enhancements-add-pre_destroy-handler.patch memory-cgroup-enhancements-implicit-force_empty-at-rmdir.patch add-the-namespaces-config-option.patch move-the-uts-namespace-under-uts_ns-option.patch move-the-ipc-namespace-under-ipc_ns-option.patch cleanup-the-code-managed-with-the-user_ns-option.patch cleanup-the-code-managed-with-the-user_ns-option-checkpatch-fixes.patch cleanup-the-code-managed-with-pid_ns-option.patch cleanup-the-code-managed-with-pid_ns-option-checkpatch-fixes.patch mark-net_ns-with-depends-on-namespaces.patch proc-proper-pidns-handling-for-proc-self.patch proc-fix-the-threaded-proc-self.patch reiser4.patch - To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html