tree aeb16e15ff5e6f88cc7137847fb5610377bf7395
parent 9a7262a0563da6b91019156abf487bcdf1a41526
author Serge E. Hallyn <serue@us.ibm.com> 1262119819 -0600
committer Linus Torvalds <torvalds@linux-foundation.org> 1262205344 -0800

generic_permission: MAY_OPEN is not write access

generic_permission was refusing CAP_DAC_READ_SEARCH-enabled
processes from opening DAC-protected files read-only, because
do_filp_open adds MAY_OPEN to the open mask.

Ignore MAY_OPEN.  After this patch, CAP_DAC_READ_SEARCH is
again sufficient to open(fname, O_RDONLY) on a file to which
DAC otherwise refuses us read permission.

Reported-by: Mike Kazantsev <mk.fraggod@gmail.com>
Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Tested-by: Mike Kazantsev <mk.fraggod@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>