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    Subject[135/165] Set cred->user_ns in key_replace_session_keyring
    2.6.39-stable review patch.  If anyone has any objections, please let us know.

    Content-Length: 1072
    Lines: 31

    From: "Serge E. Hallyn" <>

    commit f7285b5d631fd6096b11c6af0058ed3a2b30ef4e upstream.

    Since this cred was not created with copy_creds(), it needs to get
    initialized. Otherwise use of syscall(__NR_keyctl, KEYCTL_SESSION_TO_PARENT);
    can lead to a NULL deref. Thanks to Robert for finding this.

    But introduced by commit 47a150edc2a ("Cache user_ns in struct cred").

    Signed-off-by: Serge E. Hallyn <>
    Reported-by: Robert Święcki <>
    Cc: David Howells <>
    Signed-off-by: Linus Torvalds <>
    Signed-off-by: Greg Kroah-Hartman <>

    security/keys/process_keys.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/security/keys/process_keys.c
    +++ b/security/keys/process_keys.c
    @@ -845,6 +845,7 @@ void key_replace_session_keyring(void)
    new-> sgid = old-> sgid;
    new->fsgid = old->fsgid;
    new->user = get_uid(old->user);
    + new->user_ns = new->user->user_ns;
    new->group_info = get_group_info(old->group_info);

    new->securebits = old->securebits;

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      Last update: 2011-06-01 10:29    [W:0.022 / U:15.452 seconds]
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