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userns: Fix build of drivers/staging/dgrp 

Explicitly test for GLOBAL_ROOT_UID and GLOBAL_ROOT_GID
instead of using 0, allowing dgrp to compile and work
properly when user namespace support is enabled.

Cc: Bill Pemberton <wfp5p@virginia.edu>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
This commit is contained in:
Eric W. Biederman 2012-10-02 15:37:37 -07:00
parent 88265322c1
commit 702e490211
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/dgrp/dgrp_common.c
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@ -179,9 +179,9 @@ void dgrp_carrier(struct ch_struct *ch)
*/
int dgrp_chk_perm(int mode, int op)
{
if (!current_euid())
if (!uid_eq(GLOBAL_ROOT_UID, current_euid()))
mode >>= 6;
else if (in_egroup_p(0))
else if (in_egroup_p(GLOBAL_ROOT_GID))
mode >>= 3;
if ((mode & op & 0007) == op)