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authorDavid Howells <dhowells@redhat.com>2009-02-27 14:03:03 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-02-27 16:26:21 -0800
commit5170836679185357dc1b7660bad13287b39e1e33 (patch)
tree0b470820e11df7c7eef7e3161657aefe90c7c35e /include
parent8ca2f156b06bdcbfd1ab543355279246d05e2499 (diff)
downloadlinux-2.6.38-lt-ux500-5170836679185357dc1b7660bad13287b39e1e33.tar.gz
Fix recursive lock in free_uid()/free_user_ns()
free_uid() and free_user_ns() are corecursive when CONFIG_USER_SCHED=n, but free_user_ns() is called from free_uid() by way of uid_hash_remove(), which requires uidhash_lock to be held. free_user_ns() then calls free_uid() to complete the destruction. Fix this by deferring the destruction of the user_namespace. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Serge Hallyn <serue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/user_namespace.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index 315bcd37522..cc4f45361db 100644
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -13,6 +13,7 @@ struct user_namespace {
struct kref kref;
struct hlist_head uidhash_table[UIDHASH_SZ];
struct user_struct *creator;
+ struct work_struct destroyer;
};
extern struct user_namespace init_user_ns;