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mntns: Add a limit on the number of mount namespaces.

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v2: Fixed the very obvious lack of setting ucounts
    on struct mnt_ns reported by Andrei Vagin, and the kbuild
    test report.

Reported-by: Andrei Vagin <[email protected]>
Acked-by: Kees Cook <[email protected]>
Signed-off-by: "Eric W. Biederman" <[email protected]>
This commit is contained in:
Eric W. Biederman 2016-08-08 14:37:37 -05:00
commit 537f7ccb39
4 changed files with 24 additions and 1 deletions
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1
fs/mount.h
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@ -10,6 +10,7 @@ struct mnt_namespace {
struct mount * root;
struct list_head list;
struct user_namespace *user_ns;
struct ucounts *ucounts;
u64 seq; /* Sequence number to prevent loops */
wait_queue_head_t poll;
u64 event;